CN117127039A - Preparation method of wear-resistant cobalt-based alloy die for blanking metal nickel strips - Google Patents
Preparation method of wear-resistant cobalt-based alloy die for blanking metal nickel strips Download PDFInfo
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- CN117127039A CN117127039A CN202311115208.3A CN202311115208A CN117127039A CN 117127039 A CN117127039 A CN 117127039A CN 202311115208 A CN202311115208 A CN 202311115208A CN 117127039 A CN117127039 A CN 117127039A
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 229910000531 Co alloy Inorganic materials 0.000 title claims abstract description 23
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 21
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 16
- 239000002184 metal Substances 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 5
- 230000008021 deposition Effects 0.000 claims abstract description 85
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 62
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 47
- 239000000956 alloy Substances 0.000 claims abstract description 47
- 238000000889 atomisation Methods 0.000 claims abstract description 36
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 30
- 230000006698 induction Effects 0.000 claims abstract description 9
- 238000007664 blowing Methods 0.000 claims abstract description 8
- 230000008018 melting Effects 0.000 claims abstract description 7
- 238000002844 melting Methods 0.000 claims abstract description 7
- 238000000151 deposition Methods 0.000 claims description 80
- 229910017052 cobalt Inorganic materials 0.000 claims description 32
- 239000010941 cobalt Substances 0.000 claims description 32
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 32
- 238000003723 Smelting Methods 0.000 claims description 14
- 238000005242 forging Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 238000003754 machining Methods 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 5
- 239000000443 aerosol Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 239000004615 ingredient Substances 0.000 claims description 3
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 2
- 230000009977 dual effect Effects 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 4
- 229910000601 superalloy Inorganic materials 0.000 description 15
- 239000000463 material Substances 0.000 description 10
- 239000011159 matrix material Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000011888 foil Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/07—Alloys based on nickel or cobalt based on cobalt
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/067—Metallic material containing free particles of non-metal elements, e.g. carbon, silicon, boron, phosphorus or arsenic
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/123—Spraying molten metal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Metallurgy (AREA)
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Abstract
The invention belongs to the technical field of processing and preparing high-purity nickel bands in the electronic industry, and discloses a preparation method of a wear-resistant cobalt-based alloy die for blanking a metal nickel band. According to the method, after vacuum induction melting is adopted on the cobalt-base alloy, high-purity nitrogen is used as an atomization deposition medium to carry out double-scanning atomization deposition, after the double-scanning atomization deposition is completed, a cobalt-base alloy deposition blank is lifted to an atomization nozzle, heated nitrogen is blown to the center of the top of a cobalt-base alloy columnar deposition blank through the nozzle of a flow guide pipe, meanwhile, the deposition blank is slowly lowered at a speed of 10-15 mm/min, when the surface temperature of the blank is lower than 800 ℃, blowing is stopped, the blank is cooled along with a furnace, and the obtained deposition blank is heated, forged and machined to obtain a cobalt-base alloy die. The method is beneficial to improving the wear resistance and the service life of the pure nickel strip blanking die, improving the product quality and meeting the requirements of the fields of electronics, energy batteries and the like.
Description
Technical Field
The invention belongs to the technical field of processing and preparing high-purity nickel strips in the electronic industry, relates to a technology for preparing a die material for blanking and processing pure nickel strips, and in particular relates to a process for preparing a cobalt-base alloy wear-resistant high-strength die by double scanning atomization deposition.
Background
The metal nickel strip and foil have good conductivity and oxidation resistance and corrosion resistance, and are widely applied to the fields of electronics, petrifaction and the like. In recent years, the application field of strips prepared from pure metallic nickel is expanding, and the demand is increasing. However, in order to meet the final requirement, the metal nickel strip or foil needs to be punched into a proper size specification through a fine die, so that the requirement on the die material for punching is very high, the requirement on strength is high, the wear resistance is good, and the service life is long, but the domestic common tool and die steel cannot meet the requirement on long service life, and after the die prepared from the grinding tool steel is used for a period of time, the punching precision of the nickel strip product is obviously reduced. Therefore, there is a need to develop a high-temperature-resistant, wear-resistant high-performance mold material.
Unlike nickel-based superalloys, cobalt-based superalloys are not reinforced with an ordered precipitated phase that is firmly bonded to the matrix, but rather with carbides distributed in the austenitic matrix. Although the cobalt-based superalloy lacks a coherent strengthening phase and has slightly lower medium temperature strength, the cobalt-based superalloy has higher high temperature strength and good thermal fatigue resistance and wear resistance at the temperature higher than 980 ℃, and carbide in the cobalt-based superalloy is mainly MC and M 23 C 6 And M 6 C. In cobalt-based superalloys, fine M 23 C 6 The carbide can form a eutectic with the matrix. MC carbide particles are too large to directly exert a significant influence on the dislocation, so that the strengthening effect on the alloy is not obvious, and the fine dispersed carbide has a good strengthening effect. Carbides (mainly M) located on grain boundaries 23 C 6 ) Grain boundary sliding can be prevented, thereby improving the endurance strength. In addition, the carbide in the cobalt-based superalloy has better thermal stability. The growth speed of carbide gathering is slower than that of gamma phase in nickel base alloy, and the temperature of re-dissolving in matrix is higher (up to 1100 deg.c), so that the strength of cobalt base alloy is lowered slowly. However, cobalt-based superalloy materials are generally produced by a casting process, which results in serious segregation inside the material, large carbide size and segregation problems, and affects the wear resistance of the material.
Disclosure of Invention
Aiming at the problems of poor wear resistance, short service life and the like of a die for blanking a pure nickel strip in the electronic field, the invention provides a process for preparing a cobalt-based superalloy wear-resistant high-strength die by double-scanning atomization deposition, which is beneficial to prolonging the service life of the die for blanking the pure nickel strip, improving the product quality and meeting the requirements of the fields of electronics, energy batteries and the like.
The object of the invention is achieved by:
the preparation method of the wear-resistant cobalt-based alloy die for blanking the metal nickel strap comprises the following steps:
(1) And (3) batching: taking the components of a cobalt-based wear-resistant alloy blanking die, wherein the components in percentage by weight are as follows: 1.4 to 1.55; cr:
28-32; w:4.0 to 5.5; mo:1.0 to 2.5; si:1.0 to 1.5; mn:1.0 to 1.5; co: preparing the rest;
(2) And (3) a furnace: placing all raw materials with finished ingredients into a smelting crucible of a double-nozzle atomization deposition device;
(3) Vacuum induction melting: vacuumizing the double-nozzle atomization deposition equipment until the vacuum degree of the equipment is less than or equal to 0.1Pa; carrying out power transmission vacuum induction melting on the cobalt-based wear-resistant alloy, wherein the temperature range is 1450-1500 ℃ after the melting of the alloy is finished, and then preserving the heat for 10-15 min, and then slowly pouring the obtained cobalt-based wear-resistant alloy melt into a heated tundish, wherein two atomizing nozzles are arranged at the lower part of the tundish;
(4) Dual scan aerosol deposition: high-purity nitrogen is adopted as an atomization deposition medium, the gas pressure range is 35-60 MPa, after being filtered by a tundish ceramic filter screen in a smelting chamber, cobalt-based wear-resistant alloy melt flows to two atomization nozzles through a guide pipe and is atomized and deposited by the high-pressure high-purity nitrogen, and the cobalt-based wear-resistant alloy melt is atomized and deposited on a rotating depositor in a deposition chamber;
(5) Slowly cooling the deposition blank: after the double-scanning atomization deposition is finished, a cobalt-base alloy deposition blank is obtained, the deposition blank is lifted to an atomization nozzle, high-purity nitrogen is filled into a smelting chamber, the nitrogen pressure is 2 bar-5 bar, meanwhile, the deposition blank is kept unchanged in high-speed rotation and diameter on a depositor, nitrogen is blown to the central part of the top of the columnar cobalt-base alloy deposition blank through a nozzle of a flow guide pipe, meanwhile, the deposition blank is slowly lowered at a speed of 10-15 mm/min, when the surface temperature of the blank is lower than 800 ℃, the blowing is stopped, and the blank is cooled along with a furnace;
(6) Heating a deposition blank: taking out a cobalt-base alloy deposition blank, heating to 1180-1200 ℃, and preserving heat for 2-3 h;
(7) Forging and machining: taking out the heated deposited blank, forging into an alloy forging block with a size suitable for a die, and machining into a blanking die.
Preferably, in the step (5), the deposition blank is slowly lowered at a speed of 10 mm/min. The last solidification area of the columnar deposition blank is positioned at the upper position of the central area of the blank, compared with the last solidification area of the columnar deposition blank, the cooling speed of the surface layer of the cobalt-base alloy deposition blank is higher, and the last solidification area, namely the upper position of the central area of the blank, is easy to form local loosening due to the reason of cooling shrinkage, and the special cooling control mode is beneficial to promoting the feeding of the atomized deposition blank and improving the compactness of the material.
Preferably, in the step (3), the temperature of the heated tundish is 1450-1550 ℃.
Preferably, in the step (4), the purity of the high-purity nitrogen is more than or equal to 99.8%.
Preferably, in the step (4), both the atomized deposition nozzles have a scanning swing mechanism, and the driving frequency is 35HZ to 100HZ.
Preferably, in the step (4), the rotating speed of the depositor is 300-400 rpm.
Preferably, in the step (5), nitrogen is heated to 900-1000 ℃ when flowing through the tundish.
Preferably, in the step (5), when the surface temperature of the blank body is 600-700 ℃, the air blowing is stopped.
Preferably, in the step (5), the rotation speed adopted by the rotary deposition device is 180-240 rpm.
The wear resistance of cobalt-based superalloys is mainly affected by the contact or impact stress of their surface. Under stress, surface wear is a function of the interaction characteristics of the dislocation flow and the contact surface. This feature is associated with a lower stacking fault energy of the matrix and a transition of the matrix structure from face centered cubic to hexagonal close packed crystal structure under stress or temperature effects. In addition, the content, morphology and distribution of the second phase of the cobalt-based alloy, such as carbide, also has an effect on wear resistance, and the uniformly distributed carbide contributes to improvement of wear resistance.
Compared with the prior art, the invention has the beneficial effects that:
1. the cobalt-based wear-resistant alloy with high carbide is prepared by using a double-scanning atomization deposition mode and adopting high-purity nitrogen as an atomization deposition medium, the pressure range of the nitrogen gas is 35-60 MPa, and both atomization deposition nozzles are provided with scanning swing mechanisms, and the driving frequency is 35-100 HZ, so that the prepared cobalt-based wear-resistant alloy is uniform in component and dispersed and distributed in carbide.
2. After the double-scanning atomization deposition is finished, the cobalt-base alloy deposition blank is lifted to an atomization nozzle, heated nitrogen is blown to the center of the top of the columnar cobalt-base alloy deposition blank through the nozzle of the flow guide pipe, the nitrogen is heated to about 900-1000 ℃ when flowing through the tundish, meanwhile, the deposition blank is slowly lowered at a speed of 10mm/min and cooled, when the surface temperature of the blank is lower than 800 ℃, the blowing is stopped, and the blank is cooled along with the furnace. The specific slow cooling mode of the atomized deposition blank is utilized, and the control of the cooling speed is beneficial to promoting the feeding of the atomized deposition blank and improving the material density.
Therefore, the process for preparing the cobalt-based superalloy wear-resistant high-strength die by double scanning atomization deposition solves the problems of poor wear resistance, short service life and the like of a die for blanking a pure nickel strip in the electronic field, is beneficial to prolonging the service life of the die for blanking the pure nickel strip, improves the product quality, and meets the requirements of the fields of electronics, energy batteries and the like.
Detailed Description
The invention is further illustrated by the following examples:
example 1:
according to the blanking die material requirements of pure metal nickel strips and foils, the cobalt-based wear-resistant alloy blanking die comprises the following specific components in percentage by weight: 1.4; cr:28; w:4.0; mo:1.0; si:1.0; mn:1.0; co:63.6; batching 500Kg based on alloy components and crucible capacity of smelting equipment; placing all the metal raw materials with finished ingredients into a smelting crucible of double-nozzle atomization deposition equipment, vacuumizing the double-nozzle atomization deposition equipment, and enabling the vacuum degree of the equipment to be 0.05Pa; and (5) power transmission vacuum induction smelting of the cobalt-based wear-resistant alloy. After the alloy is melted, the temperature is measured, the temperature range is 1450 ℃, the temperature is kept for 10 minutes, the components and the temperature of the metal melt in the induction furnace are uniform, then the alloy melt is slowly poured into a heated tundish, and two atomizing nozzles are arranged at the lower part of the tundish. Wherein the heated tundish temperature is 1450 ℃; high-purity nitrogen (purity 99.8%) is adopted as an atomization deposition medium, and the gas pressure range is 35MPa. Both atomizing deposition nozzles had a scanning swing mechanism with a drive frequency of 35HZ. The cobalt-based alloy metal liquid is filtered by a ceramic filter screen in the tundish, flows to two nozzles through a guide pipe and is atomized and deposited by high-pressure nitrogen; depositing the atomized cobalt-based superalloy melt onto a rotating depositor in a deposition chamber, wherein the rotation speed of the depositor is 300 revolutions per minute; after atomization deposition is completed, the deposition blank is lifted to an atomization nozzle, high-purity nitrogen (purity is 99.8%) is filled into a smelting chamber, the nitrogen pressure is 2bar, meanwhile, the rotation and the diameter of the deposition blank on a depositor are kept unchanged, the high-speed rotation speed is 180 revolutions per minute, and the nitrogen is blown to the center of the top of the cobalt-base alloy columnar deposition blank through the nozzle of a flow guide pipe. Nitrogen was heated to 900 ℃ as it flowed through the tundish. Simultaneously, slowly descending the deposition blank at a speed of 10mm/min, stopping blowing when the surface temperature of the blank is 600 ℃, and cooling the blank along with the furnace; taking out a cobalt-based alloy deposition blank after atomization deposition is completed, putting the cobalt-based alloy deposition blank into a heating furnace for heating, keeping the temperature at 1180 ℃ for 2 hours; taking out the heated deposited blank, and forging the deposited blank into a forging block with a size suitable for a die; and (3) machining the cobalt-based superalloy forging block to prepare a blanking die.
The bulk density of the wear-resistant cobalt-based alloy prepared in the example is 8.51g/cm 3 The friction coefficient was 0.0032 (wear resistance was measured using a vertical frictional wear tester, the pressure was set to 98N, and the rotational speed was 300 rpm-Second).
Example 2:
according to the blanking die material requirements of pure metal nickel strips and foils, the cobalt-based wear-resistant alloy blanking die is designed to comprise the following specific components in percentage by weight: 1.55; cr:32; w:5.5; mo:2.5; si:1.5; mn:1.5; co:55.45; batching based on alloy components and crucible capacity of smelting equipment; all the metal raw materials which are prepared according to the alloy components are put into a smelting crucible of a double-nozzle atomization deposition device; vacuumizing the double-nozzle atomization deposition equipment, wherein the vacuum degree of the equipment is 0.1Pa; and (5) power transmission vacuum induction smelting of the cobalt-based wear-resistant alloy. After the alloy is melted, the temperature is measured, the temperature range is 1500 ℃, the temperature is kept for 15 minutes, the components and the temperature of the metal melt in the induction furnace are uniform, then the alloy melt is slowly poured into a heated tundish, and two atomizing nozzles are arranged at the lower part of the tundish. Wherein the heated tundish temperature is 1550 ℃; high-purity nitrogen is adopted as an atomization deposition medium, and the gas pressure range is 60MPa. Both atomizing deposition nozzles had a scanning swing mechanism with a drive frequency of 100HZ. The cobalt-based alloy metal liquid is filtered by a ceramic filter screen in the tundish, flows to two nozzles through a guide pipe and is atomized and deposited by high-pressure nitrogen; depositing the atomized cobalt-based superalloy melt onto a rotating depositor in a designed deposition chamber, wherein the rotation speed of the depositor is 400 revolutions per minute; after atomization deposition is finished, the deposition blank is lifted to an atomization nozzle, high-purity nitrogen (purity is more than or equal to 99.8%) is filled into a smelting chamber, nitrogen pressure is 5bar, meanwhile, the deposition blank is kept unchanged in high-speed rotation and diameter on a depositor, the high-speed rotation speed is 240 revolutions per minute, and nitrogen is blown to the center of the top of the cobalt-base alloy columnar deposition blank through a nozzle of a flow guide pipe. Nitrogen was heated to 1000 ℃ as it flowed through the tundish. Simultaneously, slowly descending the deposition blank at a speed of 10mm/min, stopping blowing when the surface temperature of the blank is 700 ℃, and cooling the blank along with the furnace; taking out a cobalt-based alloy deposition blank after atomization deposition is completed, putting the cobalt-based alloy deposition blank into a heating furnace for heating, keeping the temperature at 1200 ℃ for 3 hours; taking out the heated deposited blank, and forging the deposited blank into a forging block with a size suitable for a die; and (3) machining the cobalt-based superalloy forging block to prepare a blanking die.
The bulk density of the abrasion-resistant cobalt-based alloy of this example was 8.42g/cm 3 The friction coefficient reaches 0.0036, (the wear resistance is tested by adopting a vertical friction and wear tester, the pressure is set to 98N, and the rotating speed is 300 revolutions per second).
Comparative example 1
The remaining steps and conditions were the same as in example 1 except that a single nozzle aerosol deposition apparatus was used, and the single aerosol deposition nozzle did not have a scanning swing mechanism. Cobalt-based alloy product obtained in this example, bulk density: 8.23g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The coefficient of friction is 0.0062. (abrasion resistance test Using vertical Friction/abrasion tester, pressure was set at 98N, rotational speed was 300 rpm) comparative example 2
The rest steps and conditions are the same as in example 1, except that after the atomized deposition is completed, the atomized deposition ingot blank is directly lowered and cooled, and the gas is blown until the blank is cooled along with the furnace. The cobalt-based alloy product obtained in this example has bulk density of only: 7.91g/cm 3 。
Typically, the H3 die steel has a coefficient of friction of 0.128, the C12MoV die steel has a coefficient of friction of 0.313, the H13 tool die steel has a coefficient of friction of 0.323, bulk density: 7.85g/cm 3 。
Therefore, the wear-resistant life of the cobalt-based wear-resistant alloy obtained by the method is obviously prolonged.
Claims (8)
1. The preparation method of the wear-resistant cobalt-based alloy die for blanking the metal nickel strip is characterized by comprising the following steps of:
(1) And (3) batching: taking the components of a cobalt-based wear-resistant alloy blanking die, wherein the components in percentage by weight are as follows: 1.4 to 1.55; cr:
28-32; w:4.0 to 5.5; mo:1.0 to 2.5; si:1.0 to 1.5; mn:1.0 to 1.5; co: preparing the rest;
(2) And (3) a furnace: placing all raw materials with finished ingredients into a smelting crucible of a double-nozzle atomization deposition device;
(3) Vacuum induction melting: vacuumizing the double-nozzle atomization deposition equipment until the vacuum degree of the equipment is less than or equal to 0.1Pa; carrying out power transmission vacuum induction melting on the cobalt-based wear-resistant alloy, wherein the temperature range is 1450-1500 ℃ after the melting of the alloy is finished, and then preserving the heat for 10-15 min, and then slowly pouring the obtained cobalt-based wear-resistant alloy melt into a heated tundish, wherein two atomizing nozzles are arranged at the lower part of the tundish;
(4) Dual scan aerosol deposition: high-purity nitrogen is adopted as an atomization deposition medium, the gas pressure range is 35-60 MPa, after being filtered by a tundish ceramic filter screen in a smelting chamber, cobalt-based wear-resistant alloy melt flows to two atomization nozzles through a guide pipe and is atomized and deposited by the high-pressure high-purity nitrogen, and the cobalt-based wear-resistant alloy melt is atomized and deposited on a rotating depositor in a deposition chamber;
(5) Slowly cooling the deposition blank: after the double-scanning atomization deposition is finished, a cobalt-base alloy deposition blank is obtained, the deposition blank is lifted to an atomization nozzle, high-purity nitrogen is filled into a smelting chamber, the nitrogen pressure is 2 bar-5 bar, meanwhile, the deposition blank is kept unchanged in high-speed rotation and diameter on a depositor, nitrogen is blown to the central part of the top of the columnar cobalt-base alloy deposition blank through a nozzle of a flow guide pipe, meanwhile, the deposition blank is slowly lowered at a speed of 10-15 mm/min, when the surface temperature of the blank is lower than 800 ℃, the blowing is stopped, and the blank is cooled along with a furnace;
(6) Heating a deposition blank: taking out a cobalt-base alloy deposition blank, heating to 1180-1200 ℃, and preserving heat for 2-3 h;
(7) Forging and machining: taking out the heated deposited blank, forging into an alloy forging block with a size suitable for a die, and machining into a blanking die.
2. The method for producing a wear-resistant cobalt-based alloy die for metal nickel strip blanking according to claim 1, wherein in said step (3), the temperature of the heated tundish is 1450 ℃ to 1550 ℃.
3. The method for producing a cobalt-based alloy die for blanking metallic nickel strip as claimed in claim 1, wherein in said step (4), the purity of the high purity nitrogen gas is not less than 99.8%.
4. The method for producing a cobalt-based alloy die for blanking metallic nickel strip according to claim 1, wherein in the step (4), both of the two atomizing deposition nozzles have a scanning swing mechanism, and the driving frequency is 35HZ to 100HZ.
5. The method for producing a cobalt-based alloy die for blanking metallic nickel strip according to claim 1, wherein in the step (5), nitrogen is heated to 900 ℃ to 1000 ℃ while flowing through the tundish.
6. The method for producing a cobalt-based alloy die for blanking metallic nickel strip as claimed in claim 1, wherein in said step (4), the rotational speed of said depositor is 300 to 400 rpm.
7. The method for producing a cobalt-based alloy die for blanking metallic nickel strip as claimed in claim 1, wherein in said step (5), said high-speed rotation is performed at a rotation speed of 180 to 240 rpm.
8. The method for producing a cobalt-based alloy die for blanking metallic nickel strip as claimed in claim 1, wherein in said step (5), the blowing is stopped when the surface temperature of the blank is 600 to 700 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311115208.3A CN117127039A (en) | 2023-08-31 | 2023-08-31 | Preparation method of wear-resistant cobalt-based alloy die for blanking metal nickel strips |
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