CN114101965B - Nickel-chromium-molybdenum corrosion-resistant alloy welding rod and preparation method thereof - Google Patents
Nickel-chromium-molybdenum corrosion-resistant alloy welding rod and preparation method thereof Download PDFInfo
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- 238000003466 welding Methods 0.000 title claims abstract description 151
- 238000005260 corrosion Methods 0.000 title claims abstract description 94
- 230000007797 corrosion Effects 0.000 title claims abstract description 94
- OGSYQYXYGXIQFH-UHFFFAOYSA-N chromium molybdenum nickel Chemical compound [Cr].[Ni].[Mo] OGSYQYXYGXIQFH-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 71
- 239000000956 alloy Substances 0.000 title claims abstract description 71
- 238000002360 preparation method Methods 0.000 title abstract description 26
- 238000000576 coating method Methods 0.000 claims abstract description 68
- 239000011248 coating agent Substances 0.000 claims abstract description 67
- 238000003756 stirring Methods 0.000 claims abstract description 50
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 31
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 31
- 229910001200 Ferrotitanium Inorganic materials 0.000 claims abstract description 25
- 229910000616 Ferromanganese Inorganic materials 0.000 claims abstract description 23
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims abstract description 21
- 238000005520 cutting process Methods 0.000 claims abstract description 13
- 229910010413 TiO 2 Inorganic materials 0.000 claims abstract description 11
- 229910004261 CaF 2 Inorganic materials 0.000 claims abstract description 7
- 229910004762 CaSiO Inorganic materials 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims description 61
- 238000001035 drying Methods 0.000 claims description 32
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 20
- 235000019353 potassium silicate Nutrition 0.000 claims description 12
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 12
- 239000003973 paint Substances 0.000 claims description 11
- 238000005299 abrasion Methods 0.000 claims description 10
- 239000003814 drug Substances 0.000 claims description 10
- 238000011049 filling Methods 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 10
- 238000007873 sieving Methods 0.000 claims description 10
- 238000005303 weighing Methods 0.000 claims description 10
- 238000005491 wire drawing Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 6
- 239000008188 pellet Substances 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 2
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 229910052721 tungsten Inorganic materials 0.000 claims description 2
- 229910052720 vanadium Inorganic materials 0.000 claims description 2
- 229910006501 ZrSiO Inorganic materials 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 23
- 239000002184 metal Substances 0.000 abstract description 23
- 238000005253 cladding Methods 0.000 abstract description 13
- 229910052845 zircon Inorganic materials 0.000 abstract description 11
- 239000000306 component Substances 0.000 description 49
- 239000002893 slag Substances 0.000 description 23
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- 238000007580 dry-mixing Methods 0.000 description 9
- 238000004321 preservation Methods 0.000 description 9
- 230000007547 defect Effects 0.000 description 8
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
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- 230000008018 melting Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
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- 238000010891 electric arc Methods 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 2
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- 239000000126 substance Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 239000004155 Chlorine dioxide Substances 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910001182 Mo alloy Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
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- 238000001311 chemical methods and process Methods 0.000 description 1
- 235000019398 chlorine dioxide Nutrition 0.000 description 1
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- 239000008358 core component Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005493 welding type Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
- B23K35/0266—Rods, electrodes, wires flux-cored
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3033—Ni as the principal constituent
- B23K35/304—Ni as the principal constituent with Cr as the next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The inventionThe welding rod consists of a coating and a welding core, wherein the coating comprises the following components in percentage by mass: siO 5% or less 2 ≤15%，5%≤MgO≤30%，15%≤A1 2 O 3 ≤40%，10%≤CaF 2 ≤30%，4%≤MnO 2 ≤16%，1%≤TiO 2 ≤4%，1%≤CaSiO 3 Less than or equal to 3 percent, less than or equal to 1 percent of ZrSiO4 less than or equal to 3 percent, less than or equal to 1 percent of ferrotitanium less than or equal to 3 percent, less than or equal to 1 percent of ferromanganese less than or equal to 5 percent, less than or equal to 1 percent of rare earth ferrosilicon less than or equal to 6 percent; the preparation process of the welding rod comprises drawing, straightening and cutting, batching, stirring, agglomerating, press coating and baking. The nickel-chromium-molybdenum corrosion-resistant alloy welding rod provided by the invention has the advantages of low performance requirement on welding power supply equipment, excellent operation performance, stable welding, less splashing, excellent welding manufacturability, high mechanical property of cladding metal, excellent corrosion resistance, high efficiency of a preparation process and low cost.
Description
Technical Field
The invention belongs to the field of welding materials, and particularly relates to a nickel-chromium-molybdenum corrosion-resistant alloy welding rod and a preparation method thereof.
Background
With the continuous progress of modern industry, the performance requirements of the energy and chemical industry on service materials are higher and higher, particularly the corrosion resistance of the materials, the loss caused by corrosion is huge, and the corrosion problem of pressure vessels is also more and more concerned. The traditional stainless steel material has poor chlorine corrosion resistance, for example, in the corrosion test of 304 stainless steel in ferric trichloride point, the average corrosion speed reaches 56.88 g/m 2 H, service life is shorter. However, the nickel-chromium-molybdenum series corrosion-resistant alloy has excellent corrosion resistance to various severe corrosion environmentsCan be one of the only materials resistant to corrosion by wet chlorine, hypochlorite and chlorine dioxide solution, and is an indispensable material for realizing a plurality of chemical processes. Therefore, a nickel-chromium-molybdenum corrosion-resistant alloy electrode is generally adopted to carry out surfacing on a base material, so that the corrosion resistance of the surface is improved.
The nickel-chromium-molybdenum corrosion-resistant alloy welding rod used in the nuclear and chemical fields in China at present has the advantages of high price, unstable welding process, high performance requirement on welding power supply equipment, high technical requirement on welding workers and difficult quality control, so that the nickel-chromium-molybdenum corrosion-resistant alloy welding rod with low cost, good welding operation performance, low requirement on power supply equipment, good welding manufacturability, high corrosion resistance and mechanical property is developed, and the nickel-chromium-molybdenum corrosion-resistant alloy welding rod is an economic construction and social development requirement in China.
Disclosure of Invention
Aiming at the problems of high cost, unstable welding process, high performance requirement on welding power supply equipment, high difficulty in controlling the quality of the welding rod and the like of the nickel-chromium-molybdenum series corrosion-resistant alloy welding rod, the invention provides the nickel-chromium-molybdenum series corrosion-resistant alloy welding rod and a preparation method thereof.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the nickel-chromium-molybdenum corrosion-resistant alloy welding rod consists of a coating and a welding core, wherein the coating comprises the following components in percentage by mass: siO 5% or less 2 ≤15%，5%≤MgO≤30%，15%≤A1 2 O 3 ≤40%，10%≤CaF 2 ≤30%，4%≤MnO 2 ≤16%，1%≤TiO 2 ≤4%，1%≤CaSiO 3 Less than or equal to 3 percent, less than or equal to 1 percent of ZrSiO4 less than or equal to 3 percent, less than or equal to 1 percent of ferrotitanium less than or equal to 3 percent, less than or equal to 1 percent of ferromanganese less than or equal to 5 percent, less than or equal to 1 percent of rare earth ferrosilicon less than or equal to 6 percent.
Preferably, the nickel-chromium-molybdenum series corrosion-resistant alloy welding rod comprises the following components in percentage by mass: ti is more than or equal to 25% and less than or equal to 45%, fe is more than or equal to 46% and less than or equal to 74%, al is more than or equal to 1% and less than or equal to 9%.
Preferably, the nickel-chromium-molybdenum series corrosion-resistant alloy welding rod comprises the following components in percentage by mass: mn is more than or equal to 25% and less than or equal to 45%, fe is more than or equal to 55% and less than or equal to 75%.
Preferably, the nickel-chromium-molybdenum series corrosion-resistant alloy welding rod provided by the invention comprises the following components in percentage by mass: rare earth is more than or equal to 17% and less than or equal to 47%, si is more than or equal to 35% and less than or equal to 46%, fe is more than or equal to 5% and less than or equal to 34%, mn is more than or equal to 1% and less than or equal to 4%, ca is more than or equal to 1% and less than or equal to 5%, and Ti is more than or equal to 1% and less than or equal to 4%.
Preferably, the nickel-chromium-molybdenum series corrosion-resistant alloy welding rod comprises the following core components in percentage by mass: cr is 15-16.5%, mo is 15.0-17.0%, fe is 4.0-7.0,3.0%, W is 4.5%, co is 2.5%, mn is 1.0%, si is 0.08%, V is 0.1-0.3%, and Ni is the rest.
The nickel-chromium-molybdenum series corrosion-resistant alloy electrode coating provided by the invention has the main functions that:
SiO 2 : adjusting the fluidity of slag, reducing the surface tension of slag, improving the deslagging performance, reducing the alkalinity of slag, improving the weld formation, reducing the melting point of slag and stabilizing the electric arc.
MgO: the fluidity of the slag is regulated, the alkalinity of the slag is improved, the content of diffused hydrogen is reduced, and the impact toughness of weld metal is improved.
A1 2 O 3 : adjusting the viscosity of slag, adjusting the fluidity of slag, improving the formation of weld joints, and adjusting the alkalinity of slag.
CaF 2 : the melting point, viscosity and surface tension of slag are reduced, the fluidity is improved, the slag removing property is improved, and the weld joint is formed attractive; the weld porosity sensitivity is reduced, the diffusion hydrogen content of the cladding metal is reduced, the basicity of slag is improved, and the impact toughness of the weld metal is improved.
MnO 2 : belongs to weak alkaline oxides, reduces the sensitivity of welding seams to air holes, adjusts the basicity of slag, improves the welding process performance, and has the functions of desulfurizing, compensating the burnt manganese in the welding process, and the like.
TiO 2 : the arc can be stabilized, the melting point and viscosity of slag can be adjusted, and the deslagging performance and the weld joint forming can be improved.
CaSiO 3 : and the alkalinity of the slag is regulated, the viscosity and the fluidity of the slag are regulated, and the performance of deposited metal is improved.
ZrSiO4: the melting point of the slag is improved, the viscosity of the slag is regulated, the slag coverage and slag removal performance are improved, and the impact toughness of weld metal is improved.
Ferrotitanium: is favorable for eliminating hydrogen pores, improving molten drop transition and stabilizing electric arc, reducing oxygen content in liquid metal, increasing interfacial tension between slag and metal and facilitating deslagging.
Ferromanganese: the main functions of ferromanganese are deoxidation, desulfurization and alloying, so that the weld metal obtains excellent internal performance. Manganese oxide is generated after deoxidization by ferromanganese, and slag forming is carried out.
Rare earth ferrosilicon: can deoxidize, desulfur and dephosphorize, and remove harmful impurities; improving the technological performance, eliminating the pits on the surface of the welding seam, enabling the surface of the welding seam to become bright and improving the formation of the welding seam.
The composition of the electrode coating is complex, complex interaction and nonlinear effect exist among the components, the action size and the property of each component depend on the composition and the existence and the addition amount of other components, so the invention forms the comprehensive effect of each component by optimizing the design components and the content ranges thereof, thereby ensuring the welding process of the electrode to be stable, the welding process performance to be excellent and the mechanical property of deposited metal to be higher.
The invention also provides a preparation method of the nickel-chromium-molybdenum series corrosion-resistant alloy welding rod, which comprises the following preparation steps:
(1) Drawing: firstly, carrying out abrasion and rust removal on a nickel-chromium-molybdenum series corrosion-resistant alloy wire rod with the diameter of 5.5-6.5 mm through a rust removal peeling wheel, and then carrying out multi-pass reducing drawing on the wire rod by adopting a continuous wire drawing machine to obtain a welding wire with the diameter of 2-5 mm;
(2) Straightening and cutting: cutting off the welding wire by adopting a filament cutter to obtain a core wire with a certain length;
(3) And (3) batching: weighing the raw materials of the medicine skin according to the proportion;
(4) Mixing: sieving the medicinal powder, adding into a powder mixer, dry-mixing the medicinal powder to uniformly mix, and then adding water glass to wet-mix;
(5) And (3) agglomerating: charging the powder into a powder cylinder of a briquetting machine, and pressing to prepare a coating pellet;
(6) And (3) press coating: filling the paint clusters into a cylinder of an oil press, setting the turning pressure, and starting an oil pressure powder coating machine to carry out press coating to produce welding rods;
(7) Baking: naturally airing the welding rod produced in the step (6), and pushing the welding rod into a drying furnace for drying.
Further, in the preparation method, in the step (1), the angle of the welding core cut is not smaller than 80 degrees, the bending degree of the welding core is not more than 0.5mm, and the length of the welding core is 300-400mm, so that the quality of a press coating process is not affected, the coating of the press-coated welding rod is not eccentric, and the welding process is stable.
Further, in the preparation method, in the step (4), the stirring time of dry stirring is not less than 3 minutes, and the wet stirring is not less than 5 minutes, so that the components are uniformly mixed, and the preparation method is suitable for press coating.
Further, the preparation method disclosed by the invention is characterized in that in the step (4), the water glass is stored in an environment with the temperature of more than 5 ℃, so that the quality of the water glass is ensured and the press coating quality is improved.
Further, the preparation method of the invention, wherein in the step (5), the pressed paint pellet should be smooth and complete without obvious defects.
Further, in the preparation method, in the step (6), the vehicle pressure is 7-15MPa so as to ensure the quality of the press-coated surface.
Further, in the preparation method, in the step (7), the natural drying time is more than 12 hours, the drying temperature is 150-350 ℃, and the heat preservation time is 1-3 hours, so that the moisture and the crystal water are removed, and the dried welding rod is ensured not to be burnt or cracked.
Compared with the prior art, the invention has the beneficial effects that: the preparation process is efficient, the manufacturing cost is low, the surface of the prepared welding rod is smooth, the yield is high, the quality of the prepared welding rod is excellent, the performance requirement of the welding rod on welding power supply equipment is low, the direct current positive connection, the direct current reverse connection and the alternating current can be achieved, the operation performance of the welding rod is excellent, and the technical requirement on welding engineering is low; the electric arc is stable and the splashing is less during welding; the welding manufacturability is excellent, the slag removing performance is good, and the welding seam is formed attractive; the cladding metal has higher mechanical property and excellent corrosion resistance.
Drawings
FIG. 1 is a flow chart of the preparation of a nickel-chromium-molybdenum corrosion-resistant alloy electrode;
FIG. 2 is a graph showing the morphology of a clad metal obtained by overlaying a 20 low carbon steel on a nickel-chromium-molybdenum corrosion-resistant alloy electrode prepared in example 1;
FIG. 3 is a graph showing the morphology of a clad metal obtained by overlaying a 304 stainless steel with a nickel-chromium-molybdenum-based corrosion-resistant alloy electrode prepared in example 2;
FIG. 4 is a morphology diagram of the nickel-chromium-molybdenum corrosion-resistant alloy electrode prepared in example 3 after spot corrosion of cladding metal ferric trichloride;
fig. 5 is a topography of the 304 stainless steel ferric trichloride after pitting corrosion.
Detailed Description
The technical scheme of the invention is described in detail through specific embodiments.
Example 1
The nickel-chromium-molybdenum series corrosion-resistant alloy welding rod consists of a coating and a welding core, wherein the coating comprises the following components in percentage by mass: siO (SiO) 2 9% MgO, 24% A1 2 O 3 Accounting for 32%, caF 2 14% of MnO 2 9% of TiO 2 Accounting for 1%, caSiO 3 2 percent of ZrSiO4, 1 percent of ferrotitanium, 2 percent of ferromanganese and 4 percent of rare earth ferrosilicon. Wherein, ferrotitanium comprises the following components in percentage by mass: 28% of Ti, 63% of Fe and 9% of Al; the ferromanganese comprises the following components in percentage by mass: mn accounts for 25%, fe accounts for 75%; the rare earth ferrosilicon comprises the following components in percentage by mass: rare earth 19%, si 40%, fe 31%, mn 3%, ca 5% and Ti 2%.
The nickel-chromium-molybdenum series corrosion-resistant alloy welding rod core wire comprises the following components in percentage by mass: 15.5% of Cr, 17.0% of Mo, 5.0% of Fe, 4.0% of W, 2.0% of Co, less than or equal to 0.01% of C, less than or equal to 1.0% of Mn, less than or equal to 0.08% of Si, less than or equal to 0.015% of P, less than or equal to 0.001% of S, 0.2% of V and the balance of Ni.
The preparation method of the nickel-chromium-molybdenum series corrosion-resistant alloy welding rod comprises the following steps:
(1) Drawing: firstly, carrying out abrasion and rust removal on a nickel-chromium-molybdenum corrosion-resistant alloy wire rod with the diameter of 5.5 and mm through a rust removal peeling wheel, and then carrying out multi-pass reducing drawing on the wire rod by adopting a continuous wire drawing machine to obtain a welding wire with the diameter of 2 mm;
(2) Straightening and cutting: the wire was cut by a wire cutter to obtain a core wire 300mm in length, with a core wire cut angle of 85 °, and a core wire curvature of 0.05 mm.
(3) And (3) batching: weighing the raw materials of the medicine skin according to the proportion;
(4) Mixing: sieving the medicinal powder, adding into a powder mixer, dry-mixing the medicinal powder to be uniform, and then adding water glass to perform wet stirring, wherein the stirring time of the dry stirring is 5 minutes, and the stirring time of the wet stirring is 7 minutes;
(5) And (3) agglomerating: charging the powder into a powder cylinder of a briquetting machine, and pressing to prepare a coating pellet;
(6) And (3) press coating: filling the paint clusters into a cylinder of an oil press, setting the vehicle pressure to 7MPa, and starting an oil pressure powder coater to carry out press coating to produce welding rods;
(7) Baking: and (3) naturally airing the welding rod produced in the step (6) for 12 hours, and then pushing the welding rod into a drying furnace for drying, wherein the drying temperature is 150 ℃, and the heat preservation time is 3 hours.
Example 2
The nickel-chromium-molybdenum series corrosion-resistant alloy welding rod consists of a coating and a welding core, wherein the coating comprises the following components in percentage by mass: siO (SiO) 2 11%, mgO 8%, A1 2 O 3 35% of CaF 2 18%, mnO 2 11% of TiO 2 3%, caSiO 3 3 percent of ZrSiO4, 2 percent of ferrotitanium, 3 percent of ferromanganese and 3 percent of rare earth ferrosilicon. Wherein, ferrotitanium comprises the following components in percentage by mass: 35% of Ti, 58% of Fe and 7% of Al; the ferromanganese comprises the following components in percentage by mass: mn accounts for 35 percent and Fe accounts for 65 percent; the rare earth ferrosilicon comprises the following components in percentage by mass: 27% of rare earth, 37% of Si, 27% of Fe, 2% of Mn, 4% of Ca and 3% of Ti.
The nickel-chromium-molybdenum series corrosion-resistant alloy welding rod core wire comprises the following components in percentage by mass: 15.0% of Cr, 16.5% of Mo, 5.5% of Fe, 4.5% of W, 1.5% of Co, less than or equal to 0.01% of C, less than or equal to 1.0% of Mn, less than or equal to 0.08% of Si, less than or equal to 0.015% of P, less than or equal to 0.001% of S, 0.15% of V and the balance of Ni.
The preparation method of the nickel-chromium-molybdenum series corrosion-resistant alloy welding rod comprises the following steps:
(1) Drawing: firstly, carrying out abrasion and rust removal on a nickel-chromium-molybdenum corrosion-resistant alloy wire rod with the diameter of 5.5 and mm through a rust removal peeling wheel, and then carrying out multi-pass reducing drawing on the wire rod by adopting a continuous wire drawing machine to obtain a welding wire with the diameter of 2.5 mm;
(2) Straightening and cutting: the wire was cut by a wire cutter to obtain a core wire 300mm in length, with a core wire cut angle of 87 °, and a core wire curvature of 0.1 mm.
(3) And (3) batching: weighing the raw materials of the medicine skin according to the proportion;
(4) Mixing: sieving the medicinal powder, adding into a powder mixer, dry-mixing the medicinal powder to be uniform, and then adding water glass to perform wet stirring, wherein the stirring time of the dry stirring is 6 minutes, and the stirring time of the wet stirring is 6 minutes;
(5) And (3) agglomerating: charging the powder into a powder cylinder of a briquetting machine, and pressing to prepare a coating mass, wherein the prepared coating mass is smooth and complete and has no obvious defects;
(6) And (3) press coating: filling the paint clusters into a cylinder of an oil press, setting the vehicle pressure to be 14MPa, and starting an oil pressure powder coater to carry out press coating to produce welding rods;
(7) Baking: naturally airing the welding rod produced in the step (6) for 14 hours, and then pushing the welding rod into a drying furnace for drying, wherein the drying temperature is 200 ℃, and the heat preservation time is 2.5 hours.
Example 3
The nickel-chromium-molybdenum series corrosion-resistant alloy welding rod consists of a coating and a welding core, wherein the coating comprises the following components in percentage by mass: siO (SiO) 2 12% MgO 20%, A1 2 O 3 Accounting for 22%, caF 2 26%, mnO 2 6% of TiO 2 Accounting for 2%, caSiO 3 1 percent of ZrSiO4, 2 percent of ferrotitanium, 2 percent of ferromanganese, 4 percent of ferromanganese and 3 percent of rare earth ferrosilicon. Wherein, ferrotitanium comprises the following components in percentage by mass: 32% of Ti, 62% of Fe and 6% of Al; the ferromanganese comprises the following components in percentage by mass: mn accounts for 45 percent, fe accounts for 55 percent; the rare earth ferrosilicon comprises the following components in percentage by mass: 31% of rare earth, 46% of Si, 16% of Fe, 4% of Mn, 2% of Ca and 1% of Ti.
The nickel-chromium-molybdenum series corrosion-resistant alloy welding rod core wire comprises the following components in percentage by mass: 15.0% of Cr, 15.5% of Mo, 6.0% of Fe, 3.0% of W, 2.3% of Co, less than or equal to 0.01% of C, less than or equal to 1.0% of Mn, less than or equal to 0.08% of Si, less than or equal to 0.015% of P, less than or equal to 0.001% of S, 0.1% of V and the balance of Ni.
The preparation method of the nickel-chromium-molybdenum series corrosion-resistant alloy welding rod comprises the following steps:
(1) Drawing: firstly, carrying out abrasion and rust removal on a nickel-chromium-molybdenum corrosion-resistant alloy wire rod with the diameter of 6 mm by a rust removal peeling wheel, and then carrying out multi-pass reducing drawing on the wire rod by adopting a continuous wire drawing machine to obtain a welding wire with the diameter of 3.2 mm;
(2) Straightening and cutting: the wire was cut by a wire cutter to obtain a core wire having a length of 350mm, a core wire cut angle of 84 °, and a core wire curvature of 0.2 mm.
(3) And (3) batching: weighing the raw materials of the medicine skin according to the proportion;
(4) Mixing: sieving the medicinal powder, adding into a powder mixer, dry-mixing the medicinal powder to be uniform, and then adding water glass to perform wet stirring, wherein the stirring time of the dry stirring is 7 minutes, and the stirring time of the wet stirring is 8 minutes;
(5) And (3) agglomerating: charging the powder into a powder cylinder of a briquetting machine, and pressing to prepare a coating mass, wherein the prepared coating mass is smooth and complete and has no obvious defects;
(6) And (3) press coating: filling the paint clusters into a cylinder of an oil press, setting the vehicle pressure to be 9MPa, and starting an oil pressure powder coater to carry out press coating to produce welding rods;
(7) Baking: naturally airing the welding rod produced in the step (6) for 15 hours, and then pushing the welding rod into a drying furnace for drying, wherein the drying temperature is 240 ℃, and the heat preservation time is 2.5 hours.
Example 4
The nickel-chromium-molybdenum series corrosion-resistant alloy welding rod consists of a coating and a welding core, wherein the coating comprises the following components in percentage by mass: siO (SiO) 2 6% MgO 12%, A1 2 O 3 Accounting for 20%, caF 2 28%, mnO 2 14% of TiO 2 Accounting for 4%, caSiO 3 3 percent of ZrSiO4, 3 percent of ferrotitanium, 1 percent of ferrotitanium, 4 percent of ferromanganese and 5 percent of rare earth ferrosilicon. Wherein, ferrotitanium comprises the following components in percentage by mass: 28% of Ti, 70% of Fe and 2% of Al; composition of ferromanganeseThe weight percentage is as follows: mn accounts for 38 percent and Fe accounts for 62 percent; the rare earth ferrosilicon comprises the following components in percentage by mass: 38% of rare earth, 42% of Si, 12% of Fe, 1% of Mn, 3% of Ca and 4% of Ti.
The nickel-chromium-molybdenum series corrosion-resistant alloy welding rod core wire comprises the following components in percentage by mass: 15.5% of Cr, 17.0% of Mo, 5.0% of Fe, 4.0% of W, 2.0% of Co, less than or equal to 0.01% of C, less than or equal to 1.0% of Mn, less than or equal to 0.08% of Si, less than or equal to 0.015% of P, less than or equal to 0.001% of S, 0.1% of V and the balance of Ni.
The preparation method of the nickel-chromium-molybdenum series corrosion-resistant alloy welding rod comprises the following steps:
(1) Drawing: firstly, carrying out abrasion and rust removal on a nickel-chromium-molybdenum corrosion-resistant alloy wire rod with the diameter of 6 mm by a rust removal peeling wheel, and then carrying out multi-pass reducing drawing on the wire rod by adopting a continuous wire drawing machine to obtain a welding wire with the diameter of 4 mm;
(2) Straightening and cutting: the wire was cut by a wire cutter to obtain a core wire having a length of 350mm, a core wire cut angle of 85 °, and a core wire curvature of 0.08 mm.
(3) And (3) batching: weighing the raw materials of the medicine skin according to the proportion;
(4) Mixing: sieving the medicinal powder, adding into a powder mixer, dry-mixing the medicinal powder to be uniform, and then adding water glass to perform wet stirring, wherein the stirring time of the dry stirring is 4 minutes, and the stirring time of the wet stirring is 9 minutes;
(5) And (3) agglomerating: charging the powder into a powder cylinder of a briquetting machine, and pressing to prepare a coating mass, wherein the prepared coating mass is smooth and complete and has no obvious defects;
(6) And (3) press coating: filling the paint clusters into a cylinder of an oil press, setting the vehicle pressure to be 12MPa, and starting an oil pressure powder coater to carry out press coating to produce welding rods;
(7) Baking: and (3) naturally airing the welding rod produced in the step (6) for 17 hours, and then pushing the welding rod into a drying furnace for drying, wherein the drying temperature is 350 ℃, and the heat preservation time is 2 hours.
Example 5
The nickel-chromium-molybdenum series corrosion-resistant alloy welding rod consists of a coating and a welding core, wherein the coating comprises the following components in percentage by mass: siO (SiO) 2 14%, 26% MgO, A1 2 O 3 16% of CaF 2 17%, mnO 2 Accounting for 10 percent, tiO 2 Accounting for 1%, caSiO 3 1 percent of ZrSiO4, 1 percent of ferrotitanium, 3 percent of ferrotitanium, 5 percent of ferromanganese and 6 percent of rare earth ferrosilicon. Wherein, ferrotitanium comprises the following components in percentage by mass: 45% of Ti, 47% of Fe and 8% of Al; the ferromanganese comprises the following components in percentage by mass: mn accounts for 42 percent and Fe accounts for 58 percent; the rare earth ferrosilicon comprises the following components in percentage by mass: 47% of rare earth, 44% of Si, 5% of Fe, 2% of Mn, 1% of Ca and 1% of Ti.
The nickel-chromium-molybdenum series corrosion-resistant alloy welding rod core wire comprises the following components in percentage by mass: 15.8% of Cr, 16.3% of Mo, 5.7% of Fe, 4.2% of W, 2.2% of Co, less than or equal to 0.01% of C, less than or equal to 1.0% of Mn, less than or equal to 0.08% of Si, less than or equal to 0.015% of P, less than or equal to 0.001% of S, 0.15% of V and the balance of Ni.
The preparation method of the nickel-chromium-molybdenum series corrosion-resistant alloy welding rod comprises the following steps:
(1) Drawing: firstly, carrying out abrasion and rust removal on a nickel-chromium-molybdenum corrosion-resistant alloy wire rod with the diameter of 6.5 and mm through a rust removal peeling wheel, and then carrying out multi-pass reducing drawing on the wire rod by adopting a continuous wire drawing machine to obtain a welding wire with the diameter of 5 mm;
(2) Straightening and cutting: the wire was cut by a wire cutter to obtain a core wire having a length of 400mm, a core wire cut angle of 88 °, and a core wire curvature of 0.3 mm.
(3) And (3) batching: weighing the raw materials of the medicine skin according to the proportion;
(4) Mixing: sieving the medicinal powder, adding into a powder mixer, dry-mixing the medicinal powder to be uniform, and then adding water glass to perform wet stirring, wherein the stirring time of the dry stirring is 7 minutes, and the stirring time of the wet stirring is 6 minutes;
(5) And (3) agglomerating: charging the powder into a powder cylinder of a briquetting machine, and pressing to prepare a coating mass, wherein the prepared coating mass is smooth and complete and has no obvious defects;
(6) And (3) press coating: filling the paint clusters into a cylinder of an oil press, setting the vehicle pressure to be 15MPa, and starting an oil pressure powder coater to carry out press coating to produce welding rods;
(7) Baking: and (3) naturally airing the welding rod produced in the step (6) for 16 hours, and then pushing the welding rod into a drying furnace for drying, wherein the drying temperature is 300 ℃, and the heat preservation time is 2 hours.
Example 6
The nickel-chromium-molybdenum series corrosion-resistant alloy welding rod consists of a coating and a welding core, wherein the coating comprises the following components in percentage by mass: siO (SiO) 2 7%, mgO 18%, A1 2 O 3 28%, caF 2 30% of MnO 2 4% of TiO 2 Accounting for 2%, caSiO 3 3 percent of ZrSiO4, 2 percent of ferrotitanium, 3 percent of ferrotitanium, 1 percent of ferromanganese and 2 percent of rare earth ferrosilicon. Wherein, ferrotitanium comprises the following components in percentage by mass: 30% of Ti, 67% of Fe and 3% of Al; the ferromanganese comprises the following components in percentage by mass: mn accounts for 28%, fe accounts for 72%; the rare earth ferrosilicon comprises the following components in percentage by mass: 22% of rare earth, 38% of Si, 34% of Fe, 2% of Mn, 2% of Ca and 2% of Ti.
The nickel-chromium-molybdenum series corrosion-resistant alloy welding rod core wire comprises the following components in percentage by mass: 15.2% of Cr, 15.0% of Mo, 4.6% of Fe, 3.3% of W, 2.5% of Co, less than or equal to 0.01% of C, less than or equal to 1.0% of Mn, less than or equal to 0.08% of Si, less than or equal to 0.015% of P, less than or equal to 0.001% of S, 0.27% of V and the balance of Ni.
The preparation method of the nickel-chromium-molybdenum series corrosion-resistant alloy welding rod comprises the following steps:
(1) Drawing: firstly, carrying out abrasion and rust removal on a nickel-chromium-molybdenum corrosion-resistant alloy wire rod with the diameter of 6.5 and mm through a rust removal peeling wheel, and then carrying out multi-pass reducing drawing on the wire rod by adopting a continuous wire drawing machine to obtain a welding wire with the diameter of 3 mm;
(2) Straightening and cutting: the wire was cut by a wire cutter to obtain a core wire having a length of 400mm, a core wire cut angle of 86 degrees, and a core wire curvature of 0.25 mm.
(3) And (3) batching: weighing the raw materials of the medicine skin according to the proportion;
(4) Mixing: sieving the medicinal powder, adding into a powder mixer, dry-mixing the medicinal powder to be uniform, and then adding water glass to perform wet stirring, wherein the stirring time of the dry stirring is 5 minutes, and the stirring time of the wet stirring is 5 minutes;
(5) And (3) agglomerating: charging the powder into a powder cylinder of a briquetting machine, and pressing to prepare a coating mass, wherein the prepared coating mass is smooth and complete and has no obvious defects;
(6) And (3) press coating: filling the paint clusters into a cylinder of an oil press, setting the vehicle pressure to be 10MPa, and starting an oil pressure powder coater to carry out press coating to produce welding rods;
(7) Baking: and (3) naturally airing the welding rod produced in the step (6) for 15 hours, and then pushing the welding rod into a drying furnace for drying, wherein the drying temperature is 320 ℃, and the heat preservation time is 1 hour.
Example 7
The nickel-chromium-molybdenum series corrosion-resistant alloy welding rod consists of a coating and a welding core, wherein the coating comprises the following components in percentage by mass: siO (SiO) 2 15% MgO, 5% A1 2 O 3 Accounting for 40%, caF 2 10%, mnO 2 16% of TiO 2 3%, caSiO 3 2 percent of ZrSiO4, 2 percent of ferrotitanium, 3 percent of ferromanganese, 3 percent of ferroferromanganese and 1 percent of rare earth ferrosilicon. Wherein, ferrotitanium comprises the following components in percentage by mass: 40% of Ti, 55% of Fe and 5% of Al; the ferromanganese comprises the following components in percentage by mass: mn accounts for 30 percent and Fe accounts for 70 percent; the rare earth ferrosilicon comprises the following components in percentage by mass: 43% of rare earth, 35% of Si, 15% of Fe, 1% of Mn, 3% of Ca and 3% of Ti.
The nickel-chromium-molybdenum series corrosion-resistant alloy welding rod core wire comprises the following components in percentage by mass: 15.7% of Cr, 15.2% of Mo, 4.0% of Fe, 3.7% of W, 1.8% of Co, less than or equal to 0.01% of C, less than or equal to 1.0% of Mn, less than or equal to 0.08% of Si, less than or equal to 0.015% of P, less than or equal to 0.001% of S, 0.25% of V and the balance of Ni.
The preparation method of the nickel-chromium-molybdenum series corrosion-resistant alloy welding rod comprises the following steps:
(1) Drawing: firstly, carrying out abrasion and rust removal on a nickel-chromium-molybdenum corrosion-resistant alloy wire rod with the diameter of 6 mm by a rust removal peeling wheel, and then carrying out multi-pass reducing drawing on the wire rod by adopting a continuous wire drawing machine to obtain a welding wire with the diameter of 3.5 mm;
(2) Straightening and cutting: the wire was cut by a wire cutter to obtain a core wire having a length of 400mm, a core wire cut angle of 82 degrees, and a core wire curvature of 0.32 mm.
(3) And (3) batching: weighing the raw materials of the medicine skin according to the proportion;
(4) Mixing: sieving the medicinal powder, adding into a powder mixer, dry-mixing the medicinal powder to be uniform, and then adding water glass to perform wet stirring, wherein the stirring time of the dry stirring is 3 minutes, and the stirring time of the wet stirring is 8 minutes;
(5) And (3) agglomerating: charging the powder into a powder cylinder of a briquetting machine, and pressing to prepare a coating mass, wherein the prepared coating mass is smooth and complete and has no obvious defects;
(6) And (3) press coating: filling the paint clusters into a cylinder of an oil press, setting the vehicle pressure to be 8MPa, and starting an oil pressure powder coater to carry out press coating to produce welding rods;
(7) Baking: and (3) naturally airing the welding rod produced in the step (6) for 16 hours, and then pushing the welding rod into a drying furnace for drying, wherein the drying temperature is 280 ℃, and the heat preservation time is 1.5 hours.
Example 8
The nickel-chromium-molybdenum series corrosion-resistant alloy welding rod consists of a coating and a welding core, wherein the coating comprises the following components in percentage by mass: siO (SiO) 2 5% MgO, 30% A1 2 O 3 15% of CaF 2 22%, mnO 2 13% of TiO 2 Accounting for 4%, caSiO 3 1 percent of ZrSiO4, 3 percent of ferrotitanium, 1 percent of ferrotitanium, 2 percent of ferromanganese and 4 percent of rare earth ferrosilicon. Wherein, ferrotitanium comprises the following components in percentage by mass: 25% of Ti, 74% of Fe and 1% of Al; the ferromanganese comprises the following components in percentage by mass: mn accounts for 40 percent and Fe accounts for 60 percent; the rare earth ferrosilicon comprises the following components in percentage by mass: 17% of rare earth, 45% of Si, 25% of Fe, 4% of Mn, 5% of Ca and 4% of Ti.
The nickel-chromium-molybdenum series corrosion-resistant alloy welding rod core wire comprises the following components in percentage by mass: 15.4% of Cr, 16.0% of Mo, 7.0% of Fe, 4.4% of W, 1.7% of Co, less than or equal to 0.01% of C, less than or equal to 1.0% of Mn, less than or equal to 0.08% of Si, less than or equal to 0.015% of P, less than or equal to 0.001% of S, 0.3% of V and the balance of Ni.
The preparation method of the nickel-chromium-molybdenum series corrosion-resistant alloy welding rod comprises the following steps:
(1) Drawing: firstly, carrying out abrasion and rust removal on a nickel-chromium-molybdenum corrosion-resistant alloy wire rod with the diameter of 6.5 and mm through a rust removal peeling wheel, and then carrying out multi-pass reducing drawing on the wire rod by adopting a continuous wire drawing machine to obtain a welding wire with the diameter of 4.5 mm;
(2) Straightening and cutting: the wire was cut by a wire cutter to obtain a core wire having a length of 350mm, a core wire cut angle of 87 degrees, and a core wire curvature of 0.15 mm.
(3) And (3) batching: weighing the raw materials of the medicine skin according to the proportion;
(4) Mixing: sieving the medicinal powder, adding into a powder mixer, dry-mixing the medicinal powder to be uniform, and then adding water glass to perform wet stirring, wherein the stirring time of the dry stirring is 8 minutes, and the stirring time of the wet stirring is 7 minutes;
(5) And (3) agglomerating: charging the powder into a powder cylinder of a briquetting machine, and pressing to prepare a coating mass, wherein the prepared coating mass is smooth and complete and has no obvious defects;
(6) And (3) press coating: filling the paint clusters into a cylinder of an oil press, setting the vehicle pressure to 13MPa, and starting an oil pressure powder coater to carry out press coating to produce welding rods;
(7) Baking: and (3) naturally airing the welding rod produced in the step (6) for 13 hours, and then pushing the welding rod into a drying furnace for drying, wherein the drying temperature is 190 ℃, and the heat preservation time is 3 hours.
Performance testing
(1) According to GB/T228.1-2010 section 1 Metal tensile test: room temperature test method, the mechanical properties of the cladding metal of the nickel-chromium-molybdenum corrosion-resistant alloy welding rod prepared in each example are shown in table 1; the corrosion resistance test of the welding rod cladding metal is carried out according to GB/T17897-1999 stainless steel ferric trichloride spot corrosion test method, and the corrosion rate of the welding rod cladding metal ferric trichloride of the nickel-chromium-molybdenum series corrosion resistant alloy prepared in each example is shown in Table 2.
TABLE 1 mechanical properties of the cladding metals of the Nickel-chromium-molybdenum corrosion resistant alloy electrodes of the examples
TABLE 2 Corrosion Rate of Nickel-chromium-molybdenum alloy welding rod cladding Metal ferric trichloride
(2) The nickel-chromium-molybdenum series corrosion-resistant alloy welding rod prepared in the embodiment 1 is subjected to surfacing welding on 20 low-carbon steel, the appearance of the weld cladding metal is shown in fig. 2, and the weld is attractive in appearance.
The nickel-chromium-molybdenum series corrosion-resistant alloy welding rod prepared in the embodiment 2 is subjected to surfacing welding on 304 stainless steel, the appearance of the weld cladding metal is shown in fig. 3, and the weld is attractive in appearance.
Carrying out spot corrosion on the nickel-chromium-molybdenum series corrosion-resistant alloy welding rod prepared in the embodiment 3 by cladding metal ferric trichloride, wherein the morphology after the spot corrosion is shown in figure 4; the morphology of the 304 stainless steel ferric trichloride after pitting corrosion is shown in figure 5.
The welding rod preparation process provided by the invention is efficient, low in manufacturing cost, excellent in quality, capable of being used in direct current positive connection, direct current reverse connection and alternating current, suitable for different types of welding power equipment, low in performance requirement on the welding power equipment, good in operability of the welding rod, low in technical requirement on welding workers, stable in welding arc, excellent in welding manufacturability, less in splashing, good in deslagging performance, attractive in welding seam forming, higher in mechanical property of cladding metal and excellent in corrosion resistance.
Claims (9)
1. The nickel-chromium-molybdenum corrosion-resistant alloy welding rod is characterized by comprising a coating and a welding core, wherein the coating comprises the following components in percentage by mass: siO 5% or less 2 ≤15%，5%≤MgO≤30%，15%≤A1 2 O 3 ≤40%，10%≤CaF 2 ≤30%，4%≤MnO 2 ≤16%，1%≤TiO 2 ≤4%，1%≤CaSiO 3 ≤3%，1%≤ZrSiO 4 Less than or equal to 3 percent, less than or equal to 1 percent and less than or equal to 3 percent of ferrotitanium, less than or equal to 1 percent and less than or equal to 5 percent of ferromanganese, less than or equal to 1 percent and less than or equal to 6 percent of rare earth ferrosilicon;
the welding core comprises the following components in percentage by mass: cr is 15-16.5%, mo is 15.0-17.0%, fe is 4.0-7.0,3.0%, W is 4.5%, co is 2.5%, C is 0.01%, mn is 1.0%, si is 0.08%, P is 0.015%, S is 0.001%, V is 0.1-0.3%, and Ni is the rest.
2. The nickel-chromium-molybdenum series corrosion-resistant alloy welding rod according to claim 1, wherein the ferrotitanium comprises the following components in percentage by mass: ti is more than or equal to 25% and less than or equal to 45%, fe is more than or equal to 46% and less than or equal to 74%, al is more than or equal to 1% and less than or equal to 9%.
3. The nickel-chromium-molybdenum series corrosion-resistant alloy welding rod according to claim 1, wherein the ferromanganese comprises the following components in percentage by mass: mn is more than or equal to 25% and less than or equal to 45%, fe is more than or equal to 55% and less than or equal to 75%.
4. The nickel-chromium-molybdenum series corrosion-resistant alloy welding rod according to claim 1, wherein the rare earth ferrosilicon comprises the following components in percentage by mass: rare earth is more than or equal to 17% and less than or equal to 47%, si is more than or equal to 35% and less than or equal to 46%, fe is more than or equal to 5% and less than or equal to 34%, mn is more than or equal to 1% and less than or equal to 4%, ca is more than or equal to 1% and less than or equal to 5%, and Ti is more than or equal to 1% and less than or equal to 4%.
5. The nickel-chromium-molybdenum-based corrosion-resistant alloy electrode according to claim 1, which is prepared by the steps of:
(1) Drawing: firstly, carrying out abrasion and rust removal on a nickel-chromium-molybdenum series corrosion-resistant alloy wire rod with the diameter of 5.5-6.5 mm through a rust removal peeling wheel, and then carrying out multi-pass reducing drawing on the wire rod by adopting a continuous wire drawing machine to obtain a welding wire with the diameter of 2-5 mm;
(2) Straightening and cutting: cutting off the welding wire by adopting a filament cutter to obtain a core wire with a certain length;
(3) And (3) batching: weighing the raw materials of the medicine skin according to the proportion;
(4) Mixing: sieving the powder, adding into a powder mixer, dry stirring the powder to uniformly mix the powder, and then adding water glass to wet stir;
(5) And (3) agglomerating: charging the powder into a powder cylinder of a briquetting machine, and pressing to prepare a coating pellet;
(6) And (3) press coating: filling the paint clusters into a cylinder of an oil press, setting the turning pressure, and starting an oil pressure powder coating machine to carry out press coating to produce welding rods;
(7) Baking: naturally airing the welding rod produced in the step (6), and pushing the welding rod into a drying furnace for drying.
6. The nickel-chromium-molybdenum-based corrosion-resistant alloy electrode according to claim 5, wherein in said step (2), the core wire slit angle is not less than 80 °, the core wire bending degree is not more than 0.5mm, and the core wire length is 300 to 400mm.
7. The nickel-chromium-molybdenum-based corrosion-resistant alloy electrode according to claim 5, wherein in said step (4), the stirring time of the dry stirring is not less than 3 minutes, and the stirring time of the wet stirring is not less than 5 minutes.
8. The nickel-chromium-molybdenum-based corrosion-resistant alloy electrode according to claim 5, wherein in said step (6), the gauge pressure is 7 to 15MPa.
9. The nickel-chromium-molybdenum corrosion-resistant alloy welding rod according to claim 5, wherein in said step (7), the natural drying time is 12 hours or more, the drying temperature is 150 to 350 ℃, and the heat-preserving time is 1 to 3 hours.
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| CN1807000A (en) * | 2005-01-21 | 2006-07-26 | 中国船舶重工集团公司第七二五研究所 | High-intensity high-cellulose welding rod |
| CN112975199A (en) * | 2021-02-26 | 2021-06-18 | 天津市金桥焊材集团股份有限公司 | Stainless steel welding rod for improving vertical welding process performance |
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| JP3747729B2 (en) * | 2000-02-25 | 2006-02-22 | 三菱マテリアル株式会社 | Ni-base alloy coated arc welding rod |
| CN101804533A (en) * | 2010-04-27 | 2010-08-18 | 上海林肯电气有限公司 | Gas shielded flux-cored wire for welding with low temperature, high toughness and full positions |
| CN102343487A (en) * | 2010-07-30 | 2012-02-08 | 北京固本科技有限公司 | High wear-resistant flux-cored wire for resurfacing welding of spiral reamer of vacuum extruder |
| CN102126095B (en) * | 2011-03-22 | 2013-03-20 | 上海交通大学 | Nickel-based electric welding rod coating for welding nuclear island device, welding rod and preparation method thereof |
| JP6796962B2 (en) * | 2016-07-13 | 2020-12-09 | 株式会社神戸製鋼所 | Submerged arc welding method |
| CN106425160B (en) * | 2016-11-25 | 2018-10-09 | 上海大西洋焊接材料有限责任公司 | A kind of nickel-base welding rod and preparation method thereof for welding UNS N10276 nickel-base alloys |
| CN109128579A (en) * | 2018-09-13 | 2019-01-04 | 郑州凤凰新材料科技有限公司 | A kind of multipurpose steel alloy submerged arc sintered flux and preparation method thereof |
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| CN1807000A (en) * | 2005-01-21 | 2006-07-26 | 中国船舶重工集团公司第七二五研究所 | High-intensity high-cellulose welding rod |
| CN112975199A (en) * | 2021-02-26 | 2021-06-18 | 天津市金桥焊材集团股份有限公司 | Stainless steel welding rod for improving vertical welding process performance |
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