CN100343008C - High chromium rust free, wear resistance cored welding wire - Google Patents
High chromium rust free, wear resistance cored welding wire Download PDFInfo
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- CN100343008C CN100343008C CNB2005100318570A CN200510031857A CN100343008C CN 100343008 C CN100343008 C CN 100343008C CN B2005100318570 A CNB2005100318570 A CN B2005100318570A CN 200510031857 A CN200510031857 A CN 200510031857A CN 100343008 C CN100343008 C CN 100343008C
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Abstract
The present invention relates to a high chromium cored welding wire with rust and wear resistance. The welding wire takes a low carbon steel strip as an outer layer wrapper. A powder core arranged in the wrapper comprises components of the proportion by weight: 36 to 42 of high carbon ferrochrome, 26 to 32 of micro carbon ferrochromium, 15 to 17 of chromium powder, 2 to 4 of ferromolybdenum, 3 to 5 of ferrovanadium, 4 to 6 of tungsten carbide, 5 to 8 of ferroboron, 2 to 4 of nickel powder, 2 to 5 of niobium powder, 2 to 3 of rare earth silicon and 0.49 to 0.52 of filler. The comprehensive problem which obsesses people for a long time and influences the resurfacing welding quality and the service life of equipment is solved by adopting a technical scheme that the chromium content is increased and multiple metal is added in the components of the welding wire powder core. Thereby, the present invention has the wear resistance performance of high chromium cast iron cored welding wires, also reserves the corrosion resistance performance of high chromium ferritic stainless steel materials, and has crack resistance performance better than that of high chromium cast iron. The hardness average value of the deposited metal is HRC54. The present invention is suitable for the resurfacing welding manufacture and repair of components and equipment which have high requirements for wear resistance, corrosion resistance and crack resistance, and is especially suitable for the resurfacing welding manufacture of rotors of Banbury mixers in rubber machinery.
Description
Technical field
The present invention relates to a kind of welding material of metal, particularly a kind of high chromium rust free, wear resistance cored welding wire.
Background technology
Existing in the market a kind of rich chromium cast iron wear-resisting welding wire with flux core and a kind of chrome content are 28% ferrite stainless steel electrode.As everyone knows, rich chromium cast iron is a kind of very wear-resisting material, but crack resistance also is an extreme difference, the ferrite stainless steel electrode is a kind of material of good resistance to high temperature oxidation, because of it is to connect welding rod, so crack resistance is fine, be that the rich chromium cast iron flux-cored wire can't be compared, but it does not have the hardness of high-abrasive material, can not if can concentrate their advantages separately, overcome their deficiencies separately as the build-up wear-resistant material, research is a kind of both wear-resisting between them, corrosion-resistant, good and the new varieties flux-cored wire that practical value is higher of crack resistance again, the very promising pioneering work of can yet be regarded as.Based on this design, develop and a kind ofly not only had the wear-resisting characteristics of rich chromium cast iron but also can keep the decay resistance of ferritic stainless steel and the flux-cored wire of good cracking resistance, the combination property that this really can refresh the existing flux-cored wire in this field creates a kind of new varieties welding wire.
Summary of the invention
At above-mentioned situation, the purpose of this invention is to provide the higher high chromium rust free, wear resistance cored welding wire of a kind of practical value, this flux-cored wire is not only wear-resisting but also corrosion-resistant between rich chromium cast iron wear-resisting welding wire with flux core and ferritic stainless steel welding material and flux-cored wire that crack resistance is good.
A kind of high chromium rust free, wear resistance cored welding wire of the present invention is outer foreskin with mild-carbon steel strip, and is equipped with multi-element metal powder formation powder core in foreskin, and the composition of this powder core (weight ratio) is:
High carbon ferro-chrome 36～38 chromic carbide irons 30～32
Hafnium metal powfer 16～17 molybdenum-irons 2～4
Vanadium iron 3～4 tungsten carbides 5～6
Ferro-boron 7～8 nickel powders 2
Niobium powder 4～5 rare earth silicon 2～3
Loading 0.51～0.52
The present invention is used in the technical scheme that is equipped with the multi-element metal powder in the composition of welding wire powder core and increases chromium content, has solved long-term puzzlement and has influenced the global question in equipment surfacing quality and service life.Make the present invention reach the wearability that both has the rich chromium cast iron flux-cored wire, kept the decay resistance of high chromium content ferrite stainless steel material and the cracking resistance more much better again, deposited metal hardness mean value HRC54 than rich chromium cast iron.
The present invention has compared following tangible difference with the prior art scheme:
One, compares with general rich chromium cast iron flux-cored wire.
(1) composition difference.A general rich chromium cast iron flux-cored wire carbon containing, silicon, chromium, and flux-cored wire of the present invention also contains nickel, vanadium, tungsten, boron, niobium, molybdenum etc.; Added more graphite in the rich chromium cast iron flux-cored wire prescription, carbon content is generally 3% or higher in the deposited metal, and the present invention does not then add graphite specially, and phosphorus content is lower in the deposited metal, and does not specially add silicon.
(2) metallographic structure difference.The tissue of general rich chromium cast iron flux-cored wire mainly is a structure of cast iron, and flux-cored wire of the present invention has nearly 50% ferritic structure, and all the other are troostite and a large amount of carbide and boride tissues.
(3) crack resistance difference.The crack resistance of general rich chromium cast iron flux-cored wire is very poor, and flux-cored wire of the present invention has better cracking resistance, and as compare test under the same weld condition, two blocks of materials of test piece are A
3Steel is of a size of 200 * 100 * 20mm, the long welding bead of 150mm of difference built-up welding, and four of rich chromium cast iron flux-cored wire transverse fissures, crackle does not take place in flux-cored wire of the present invention.In shop test, the crack resistance difference of the rich chromium cast iron flux-cored wire that the present invention and manufacturer use is more obvious.
(4) decay resistance difference.Because chromium content is higher in the welding wire of the present invention, adds multiple elements such as nickel simultaneously, its decay resistance is better than general rich chromium cast iron flux-cored wire.
Two, compare with the high chromium content ferrite stainless steel material.
(1) composition difference.Added multiple alloying element in the welding wire of the present invention.
(2) metallographic structure difference.Welding wire of the present invention contains more troostite and a large amount of carbide and borides in the deposited metal of welding.
(3) performance difference.Many hard phases are arranged in the welding wire of the present invention, so deposited metal hardness height, wearability is good.
That the present invention is applicable to is wear-resisting, corrosion-resistant, the built-up welding manufacturing and the reparation of the demanding parts of crack resistance and equipment, is specially adapted to the built-up welding manufacturing as the closed-smelting machine rotor in the rubber manufacturing machinery.
The specific embodiment
High chromium rust free, wear resistance cored welding wire of the present invention, with mild-carbon steel strip is outer foreskin, its inner powder core is by high carbon ferro-chrome, chromic carbide iron, hafnium metal powfer, molybdenum-iron, vanadium iron, tungsten carbide, ferro-boron, nickel powder, niobium powder, rare earth silicon are formed, adopting the drawing moulding process to make external diameter is φ 3.2～φ 4mm flux-cored wire product, uses the submerged arc welding machine welding.
Embodiment 1: the outer foreskin of welding wire is the H08A steel band, and width of steel band is 16mm, thick 0.35mm.Welding wire powder core formulation weight ratio is: high carbon ferro-chrome 38, and chromic carbide iron 32, hafnium metal powfer 17, molybdenum-iron 4, vanadium iron 3, tungsten carbide 6, ferro-boron 8, nickel powder 2, niobium powder 4, rare earth silicon 2, the welding wire loading is 0.51, external diameter is φ 3.8mm; Adopt the submerged arc welding machine built-up welding, welding current is 380A, solder flux is 260, and test plate (panel) is an ordinary low-carbon steel, is of a size of 200 * 100 * 20mm, built-up welding single track welding bead 150mm is long, deposited metal hardness mean value HRC54, overlay cladding does not have the naked eyes visible crack, and test plate (panel) is put in 900 ℃ of high temperature furnaces and keeps 4 hours then with the stove cool to room temperature, deposited metal common matrix material do not occur and produces the very phenomenon of heavy scale, and the present embodiment deposited metal is placed in to lose in 48 hours in the 67 degree nitric acid corrosion phenomenon.
Embodiment 2: the outer foreskin of welding wire is the H08A steel band, and width of steel band is 16mm, thick 0.35mm.Welding wire powder core formulation weight ratio is: high carbon ferro-chrome 36, and chromic carbide iron 30, hafnium metal powfer 16, molybdenum-iron 2, vanadium iron 4, tungsten carbide 5, ferro-boron 7, nickel powder 2, niobium powder 5, rare earth silicon 3, the welding wire loading is 0.52, the welding wire external diameter pulls into φ 3.2mm; Adopt the submerged arc welding machine built-up welding, welding current is 380A, solder flux is 260, and test plate (panel) requires with embodiment 1, and built-up welding single track welding bead 150mm is long, deposited metal hardness mean value HRC53, overlay cladding does not have the naked eyes visible crack, and test plate (panel) is put in 800 ℃ of high temperature furnaces and kept 4 hours, when test plate (panel) advances stove, put into stove sulphur 5g in the lump, because of burner hearth little, to cause the sulphur corrosive environment, after reaching temperature and time, cool to room temperature with the furnace, take out when observing, the mother metal of common material produces very thick oxide skin, compares with embodiment 1, oxide skin is comparatively loose, and the oxidation of sulfureted corrosion does not take place on the deposited metal.For investigating the actual built-up welding situation of welding wire of the present invention at closed-smelting machine rotor, when factory's scene test weld, hardness and crack resistance and other performance all obtain manufacturer certainly, have taken a stand and have bought welding wire of the present invention.
For guaranteeing welding wire performance of the present invention, each raw-material content requirement is in the welding wire powder core prescription: the chrome content of high carbon ferro-chrome is 65%, the chromic carbide iron chrome content is 65%, and the hafnium metal powfer chrome content is not less than 98%, and it is 60% that molybdenum-iron contains the molybdenum amount, the vanadium iron vanadium content is 50%, tungsten carbide tungstenic amount is not less than 90%, and the ferro-boron boron content is the best 20%, and the nickel powder nickel content is not less than 99%, niobium powder niobium content is not less than 99%, and rare earth silicon contains rare earth element and is not less than 30%.Whole mistake 60 mesh sieves of each raw material powder in the said ratio.
Claims (3)
1, a kind of high chromium rust free, wear resistance cored welding wire is outer foreskin with mild-carbon steel strip, and is equipped with multi-element metal powder formation powder core in foreskin, and the composition of this powder core (weight ratio) is:
High carbon ferro-chrome 36～38
Chromic carbide iron 30～32
Hafnium metal powfer 16～17
Molybdenum-iron 2～4
Vanadium iron 3～4
Tungsten carbide 5～6
Ferro-boron 7～8
Nickel powder 2
Niobium powder 4～5
Rare earth silicon 2～3
Loading 0.51～0.52
2, a kind of high chromium rust free, wear resistance cored welding wire according to claim 1, the content that it is characterized in that described metal dust is: the high carbon ferro-chrome chrome content is 65%, the chromic carbide iron chrome content is 65%, and the hafnium metal powfer chrome content is not less than 98%, and it is 60% that molybdenum-iron contains the molybdenum amount, the vanadium iron vanadium content is 50%, tungsten carbide tungstenic amount is not less than 90%, and the ferro-boron boron content is the best 20%, and the nickel powder nickel content is not less than 99%, niobium powder niobium content is not less than 99%, and rare earth silicon contains rare earth element and is not less than 30%.
3, a kind of high chromium rust free, wear resistance cored welding wire according to claim 1 and 2 is characterized in that whole mistake 60 mesh sieves of described metal dust.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100318570A CN100343008C (en) | 2005-07-06 | 2005-07-06 | High chromium rust free, wear resistance cored welding wire |
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| CNB2005100318570A CN100343008C (en) | 2005-07-06 | 2005-07-06 | High chromium rust free, wear resistance cored welding wire |
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| CN1714987A CN1714987A (en) | 2006-01-04 |
| CN100343008C true CN100343008C (en) | 2007-10-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101780609B (en) * | 2009-01-15 | 2012-03-07 | 山东聚力焊接材料有限公司 | Slag-free flux-cored wire process |
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| CN101306493B (en) * | 2008-07-01 | 2010-11-03 | 山东大学 | Flux-cored steel belt for build-up welding and preparation method thereof |
| CN101380698B (en) * | 2008-10-09 | 2011-08-10 | 苏州新锐硬质合金有限公司 | Novel tubular hard surfacing material |
| CN102233491B (en) * | 2010-04-27 | 2013-01-09 | 昆山京群焊材科技有限公司 | Self-shielded flux-cored wire |
| CN101920413B (en) * | 2010-05-16 | 2013-07-17 | 十堰金科化工有限公司 | Surfacing and repairing flux-cored wire of hot forging die |
| CN101856776B (en) * | 2010-06-11 | 2012-07-18 | 河海大学常州校区 | Niobium enhanced wear-resisting submerged arc bead weld flux-cored wire |
| CN101837522B (en) * | 2010-06-11 | 2013-06-19 | 河海大学常州校区 | Vanadium-reinforced wear-resistant submerged-arc surfacing flux-cored welding wire |
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| TW201318758A (en) * | 2011-11-01 | 2013-05-16 | Sorex Welding Co Ltd | Self-shielded flux cored welding wire |
| US9475154B2 (en) | 2013-05-30 | 2016-10-25 | Lincoln Global, Inc. | High boron hardfacing electrode |
| CN103317262A (en) * | 2013-05-31 | 2013-09-25 | 河北钢铁股份有限公司唐山分公司 | Flux-cored welding wire for surfacing welding of cover face layer of gray cast iron |
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| CN107414343A (en) * | 2017-08-19 | 2017-12-01 | 芜湖鼎瀚再制造技术有限公司 | The built-up welding of hot extrusion pressure roller submerged-arc welding flux cored wire and its welding procedure |
| CN108296666A (en) * | 2018-01-24 | 2018-07-20 | 江苏孚尔姆焊业股份有限公司 | Abrasion-proof overlaying welding flux-cored wire |
| CN110270775B (en) * | 2019-04-23 | 2020-12-29 | 安徽科技学院 | Metal powder core type flux-cored wire for neutron irradiation resistant steel |
| CN111515580A (en) * | 2020-04-14 | 2020-08-11 | 山东能源重装集团恒图科技有限公司 | Abrasion-resistant metal powder core type stainless steel flux-cored wire and application thereof |
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| CN1714987A (en) | 2006-01-04 |
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Assignee: Ningbo Longxing Welding And Cutting Equipment Co., Ltd. Assignor: Xiangtan University Contract fulfillment period: 2008.9.18 to 2017.9.18 contract change Contract record no.: 2008430000008 Denomination of invention: High chromium rust free, wear resistance cored welding wire Granted publication date: 20071017 License type: Exclusive license Record date: 2008.11.3 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.9.18 TO 2017.9.18; CHANGE OF CONTRACT Name of requester: NINGBO LONGXING WELDING-CUTTING SCIENCE CO., LTD. Effective date: 20081103 |
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