CN110538992A - Diffusion welding process for tungsten alloy and 316L stainless steel - Google Patents
Diffusion welding process for tungsten alloy and 316L stainless steel Download PDFInfo
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- CN110538992A CN110538992A CN201910887907.7A CN201910887907A CN110538992A CN 110538992 A CN110538992 A CN 110538992A CN 201910887907 A CN201910887907 A CN 201910887907A CN 110538992 A CN110538992 A CN 110538992A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/103—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing an organic binding agent comprising a mixture of, or obtained by reaction of, two or more components other than a solvent or a lubricating agent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1035—Liquid phase sintering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
- B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
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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
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/14—Preventing or minimising gas access, or using protective gases or vacuum during welding
Abstract
the invention relates to the technical field of metal welding, in particular to a diffusion welding process of tungsten alloy and 316L stainless steel; the performance of the tungsten alloy prepared by the method is greatly improved, the density is more than 18g/cm3, and the Vickers hardness is more than 300kg, which shows that the performance of the tungsten alloy prepared by the method is better than that of the tungsten alloy prepared by the existing welding process; the tungsten alloy and the 316L stainless steel are fused and infiltrated into each other in a high-temperature diffusion welding mode, so that the welding effect is superior to that of common laser welding, and the welding quality is improved; when the diffusion welding process provided by the invention is adopted to weld the tungsten alloy and the 316L stainless steel, the number of products can be diffusion welded is more than 30k, and compared with the existing common laser welding process, the yield is higher and the efficiency is higher; the quantity of required mechanical equipment and the quantity of workers are reduced, the production cost is saved, and the labor is also saved.
Description
Technical Field
The invention relates to the technical field of metal welding, in particular to a diffusion welding process of tungsten alloy and 316L stainless steel.
Background
tungsten alloy is an alloy formed by adding other elements based on tungsten. Among metals, tungsten has the highest melting point, good high-temperature strength, creep resistance, heat conduction, electric conduction and electron emission performance and large specific gravity, is widely used in the electronic and electric light source industries and is also used for manufacturing rocket nozzles, die-casting dies, armor-piercing bullet cores, contacts, heating elements, heat shields and the like in the departments of aerospace, casting, weapons and the like besides being used for manufacturing hard alloy and being used as alloy additive in large quantity
the 316L stainless steel does not generate corrosion, pitting corrosion, rusting or abrasion due to the properties of the steel. Stainless steel enables structural components to permanently maintain the integrity of the engineering design due to its good corrosion resistance.
based on the above-mentioned advantages and disadvantages of the tungsten alloy and the 316L stainless steel, it is common to weld the two together to improve their respective performance disadvantages. However, most of the existing welding processes adopt a laser welding mode, but the laser welding has the disadvantages of low productivity and efficiency, and needs a plurality of machines and manpower when carrying out batch welding, which not only increases the production cost, but also consumes the manpower. And the grade of the product obtained after diffusion welding is relatively poor.
Disclosure of Invention
Aiming at the existing problems, the invention provides a diffusion welding process of tungsten alloy and 316L stainless steel, which not only improves the welding quality of parts, but also has higher welding productivity and efficiency. In addition. The invention also reduces the quantity of mechanical equipment and workers needed in welding, thereby not only saving the production cost, but also saving the manpower.
In order to achieve the purpose, the invention adopts the following technical scheme:
A diffusion welding process of tungsten alloy and 316L stainless steel comprises the following steps:
s1, accurately weighing tungsten powder, copper powder and a binder required by the manufacture of the tungsten alloy according to a specified proportion, then placing the tungsten powder, the copper powder and the binder into an internal mixer, and internally mixing for 20-30min at the temperature of 120-150 ℃; then crushing the material mass obtained by banburying, and preparing a tungsten alloy injection blank A through the processes of feeding injection molding, degreasing and sintering in sequence;
Wherein, the mold temperature is 100-120 ℃, the degreasing temperature is 120-140 ℃, the degreasing time is 3-10h, and the sintering temperature is 1200-1400 ℃ during injection molding;
s2, accurately weighing 316L stainless steel powder and adhesive required by manufacturing 316L stainless steel according to a specified proportion, and carrying out banburying, crushing, injection molding, degreasing and sintering on the 316L stainless steel powder and the adhesive required by manufacturing 316L stainless steel in sequence by adopting the same steps as S1 to prepare a 316L stainless steel blank B;
wherein, the mold temperature is 80-100 ℃ during injection molding, the degreasing temperature is 100-120 ℃, the degreasing time is 4-7h, and the sintering temperature is 1000-1200 ℃;
s3, placing the tungsten alloy injection blank A and the 316L stainless steel blank B in a sintering furnace, carrying out infiltration sintering in a microcomputer program-controlled high-temperature hydrogen atmosphere sintering furnace, and naturally cooling to room temperature; wherein the temperature in the hydrogen atmosphere sintering furnace is set to 1000-;
s4, placing the tungsten alloy sintered piece A obtained in the S3 in a single-chamber induction skull furnace, setting the temperature in the single-chamber induction skull furnace to 1400-;
S5, the tungsten alloy sintered piece A obtained by secondary sintering in the S4 and the 316L stainless steel sintered piece B are placed in a vacuum hot pressing furnace after being assembled, and hot pressing sintering treatment is carried out on the tungsten alloy sintered piece A and the 316L stainless steel sintered piece B under the condition that the temperature is 1350-1380 ℃ until the tungsten alloy sintered piece A and the 316L stainless steel sintered piece B are naturally welded into a whole, namely the diffusion welding of the tungsten alloy and the 316L stainless steel is completed.
Furthermore, the degreasing agent in S1 and S2 is selected from n-heptane or n-hexane.
Furthermore, the loading capacity of 316L stainless steel powder in S2 is 90-95%, and the particle size is less than or equal to 30 μm.
Still further, the adhesives used in S1 and S2 include paraffin wax, high density polyethylene, polypropylene and stearic acid, wherein the paraffin wax, the high density polyethylene, the polypropylene and the stearic acid respectively account for 65%, 16% and 3% of the mass of the adhesive.
Further, the sintering time in S3 is 1-2 h.
Further, the sintering time in S5 is 1h, and the pressure in the vacuum hot pressing furnace is set to be 20-40 MPa.
By adopting the technical scheme, the invention has the beneficial effects that:
1. the performance of the tungsten alloy prepared by the method is greatly improved, the density is more than 18g/cm3, and the Vickers Hardness (HV) is more than 300kg, which shows that the performance of the tungsten alloy prepared by the method is better than that of the tungsten alloy prepared by the existing welding process.
2. By means of high-temperature diffusion welding, the tungsten alloy and the 316L stainless steel are fused and infiltrated into each other, so that the welding effect is superior to that of common laser welding, and the welding quality is improved. The detection shows that the drawing force of the tungsten alloy obtained by the welding process and a 316L stainless steel welding piece is more than 25 kg.
3. practice proves that when the diffusion welding process provided by the invention is used for welding tungsten alloy and 316L stainless steel, the number of diffusion welding products is more than 30k, and compared with the existing common laser welding process, the yield is higher and the efficiency is higher. The quantity of required mechanical equipment and the quantity of workers are reduced, the production cost is saved, and the labor is also saved.
drawings
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the weld between the tungsten alloy and 316L stainless steel of the present invention:
Wherein: a represents 316L stainless steel;
B represents a tungsten alloy;
And C represents a structure diagram of a finished product after the 316L stainless steel and the tungsten alloy are welded.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
example 1:
a diffusion welding process of tungsten alloy and 316L stainless steel comprises the following steps:
S1, accurately weighing tungsten powder, copper powder and a binder required by the manufacture of tungsten alloy according to a specified proportion, then placing the tungsten powder, the copper powder and the binder into an internal mixer, and internally mixing for 20min at the temperature of 120 ℃; then crushing the material mass obtained by banburying, and preparing a tungsten alloy injection blank A through the processes of feeding injection molding, degreasing and sintering in sequence;
Wherein the mold temperature is 100 ℃, the degreasing temperature is 120 ℃, the degreasing time is 3h, and the sintering temperature is 1200 ℃ during injection molding;
S2, accurately weighing 316L stainless steel powder and adhesive required by manufacturing 316L stainless steel according to a specified proportion, and carrying out banburying, crushing, injection molding, degreasing and sintering on the 316L stainless steel powder and the adhesive required by manufacturing 316L stainless steel in sequence by adopting the same steps as S1 to prepare a 316L stainless steel blank B;
Wherein the mold temperature is 80 ℃ during injection molding, the degreasing temperature is 100 ℃, the degreasing time is 4h, and the sintering temperature is 1000 ℃;
S3, placing the tungsten alloy injection blank A and the 316L stainless steel blank B in a sintering furnace, carrying out infiltration sintering in a microcomputer program-controlled high-temperature hydrogen atmosphere sintering furnace, and naturally cooling to room temperature; setting the temperature in a hydrogen atmosphere sintering furnace to be 1000 ℃, and obtaining a tungsten alloy sintered part A and a 316L stainless steel sintered part B after sintering;
S4, placing the tungsten alloy sintered piece A obtained in the S3 into a single-cavity induction skull furnace, setting the temperature in the single-cavity induction skull furnace to 1400 ℃, sintering for 2h at the temperature, and carrying out the same sintering treatment on a 316L stainless steel sintered piece B according to the method;
And S5, assembling the tungsten alloy sintered part A obtained by secondary sintering in the S4 and the 316L stainless steel sintered part B, placing the assembled tungsten alloy sintered part A and the 316L stainless steel sintered part B in a vacuum hot pressing furnace, and carrying out hot pressing sintering treatment on the tungsten alloy sintered part A and the 316L stainless steel sintered part B at the temperature of 1350 ℃ until the tungsten alloy sintered part A and the 316L stainless steel sintered part B are naturally welded into a whole, namely finishing the diffusion welding of the tungsten alloy and the 316L stainless steel.
And the degreasing agent in the S1 and S2 is n-heptane.
the load of 316L stainless steel powder in S2 was 90%, and its particle size was 30 μm.
the adhesives used in the S1 and S2 comprise paraffin, high-density polyethylene, polypropylene and stearic acid, wherein the paraffin, the high-density polyethylene, the polypropylene and the stearic acid respectively account for 65%, 16% and 3% of the mass of the adhesives.
The sintering time in S3 was 2 h.
And the sintering time in the S5 is 1h, and the pressure in the vacuum hot pressing furnace is set to be 20 MPa.
example 2:
A diffusion welding process of tungsten alloy and 316L stainless steel comprises the following steps:
s1, accurately weighing tungsten powder, copper powder and a binder required by the manufacture of the tungsten alloy according to a specified proportion, then placing the tungsten powder, the copper powder and the binder into an internal mixer, and internally mixing for 20-30min at the temperature of 120-150 ℃; then crushing the material mass obtained by banburying, and preparing a tungsten alloy injection blank A through the processes of feeding injection molding, degreasing and sintering in sequence;
wherein the mold temperature is 110 ℃, the degreasing temperature is 130 ℃, the degreasing time is 5h, and the sintering temperature is 1300 ℃ during injection molding;
s2, accurately weighing 316L stainless steel powder and adhesive required by manufacturing 316L stainless steel according to a specified proportion, and carrying out banburying, crushing, injection molding, degreasing and sintering on the 316L stainless steel powder and the adhesive required by manufacturing 316L stainless steel in sequence by adopting the same steps as S1 to prepare a 316L stainless steel blank B;
Wherein the mold temperature is 90 ℃, the degreasing temperature is 110 ℃, the degreasing time is 5h, and the sintering temperature is 1100 ℃ during injection molding;
S3, placing the tungsten alloy injection blank A and the 316L stainless steel blank B in a sintering furnace, carrying out infiltration sintering in a microcomputer program-controlled high-temperature hydrogen atmosphere sintering furnace, and naturally cooling to room temperature; setting the temperature in a hydrogen atmosphere sintering furnace to 1100 ℃, and obtaining a tungsten alloy sintered part A and a 316L stainless steel sintered part B after sintering;
S4, placing the tungsten alloy sintered piece A obtained in the S3 into a single-cavity induction skull furnace, setting the temperature in the single-cavity induction skull furnace to be 1430 ℃, sintering for 2h at the temperature, and carrying out the same sintering treatment on a 316L stainless steel sintered piece B according to the method;
and S5, assembling the tungsten alloy sintered part A obtained by secondary sintering in the S4 and the 316L stainless steel sintered part B, placing the assembled tungsten alloy sintered part A and the 316L stainless steel sintered part B in a vacuum hot pressing furnace, and carrying out hot pressing sintering treatment on the tungsten alloy sintered part A and the 316L stainless steel sintered part B at the temperature of 1360 ℃ until the tungsten alloy sintered part A and the 316L stainless steel sintered part B are naturally welded into a whole, namely finishing the diffusion welding of the tungsten alloy and the 316L stainless steel.
And the degreasing agent in the S1 and S2 is n-hexane.
the load of 316L stainless steel powder in S2 was 93%, and its particle size was 20 μm.
The adhesives used in the S1 and S2 comprise paraffin, high-density polyethylene, polypropylene and stearic acid, wherein the paraffin, the high-density polyethylene, the polypropylene and the stearic acid respectively account for 65%, 16% and 3% of the mass of the adhesives.
The sintering time in S3 was 1.5 h.
and the sintering time in the S5 is 1h, and the pressure in the vacuum hot pressing furnace is set to be 30 MPa.
example 3:
A diffusion welding process of tungsten alloy and 316L stainless steel comprises the following steps:
s1, accurately weighing tungsten powder, copper powder and a binder required by manufacturing the tungsten alloy according to a specified proportion, then placing the tungsten powder, the copper powder and the binder into an internal mixer, and internally mixing for 30min at the temperature of 150 ℃; then crushing the material mass obtained by banburying, and preparing a tungsten alloy injection blank A through the processes of feeding injection molding, degreasing and sintering in sequence;
Wherein the mold temperature is 100-120 ℃ during injection molding, the degreasing temperature is 140 ℃, the degreasing time is 10h, and the sintering temperature is 1400 ℃;
s2, accurately weighing 316L stainless steel powder and adhesive required by manufacturing 316L stainless steel according to a specified proportion, and carrying out banburying, crushing, injection molding, degreasing and sintering on the 316L stainless steel powder and the adhesive required by manufacturing 316L stainless steel in sequence by adopting the same steps as S1 to prepare a 316L stainless steel blank B;
Wherein the mold temperature is 100 ℃, the degreasing temperature is 120 ℃, the degreasing time is 7h, and the sintering temperature is 1200 ℃ during injection molding;
S3, placing the tungsten alloy injection blank A and the 316L stainless steel blank B in a sintering furnace, carrying out infiltration sintering in a microcomputer program-controlled high-temperature hydrogen atmosphere sintering furnace, and naturally cooling to room temperature; wherein the temperature in the hydrogen atmosphere sintering furnace is set to 1200 ℃, and a tungsten alloy sintered part A and a 316L stainless steel sintered part B are obtained after sintering is finished;
s4, placing the tungsten alloy sintered piece A obtained in the S3 into a single-chamber induction skull furnace, setting the temperature in the single-chamber induction skull furnace to 1450 ℃, sintering for 2h at the temperature, and carrying out the same sintering treatment on a 316L stainless steel sintered piece B according to the method;
and S5, assembling the tungsten alloy sintered part A obtained by secondary sintering in the S4 and the 316L stainless steel sintered part B, placing the assembled tungsten alloy sintered part A and the 316L stainless steel sintered part B in a vacuum hot pressing furnace, and carrying out hot pressing sintering treatment on the tungsten alloy sintered part A and the 316L stainless steel sintered part B at the temperature of 1380 ℃ until the tungsten alloy sintered part A and the 316L stainless steel sintered part B are naturally welded into a whole, namely finishing the diffusion welding of the tungsten alloy and the 316L stainless steel.
And the degreasing agent in the S1 and S2 is n-heptane.
the load of 316L stainless steel powder in S2 was 95%, and its particle size was 15 μm.
the adhesives used in the S1 and S2 comprise paraffin, high-density polyethylene, polypropylene and stearic acid, wherein the paraffin, the high-density polyethylene, the polypropylene and the stearic acid respectively account for 65%, 16% and 3% of the mass of the adhesives.
The sintering time in S3 was 1 h.
and the sintering time in the S5 is 1h, and the pressure in the vacuum hot pressing furnace is set to be 40 MPa.
the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. A diffusion welding process of tungsten alloy and 316L stainless steel is characterized by comprising the following steps:
s1, accurately weighing tungsten powder, copper powder and a binder required by the manufacture of the tungsten alloy according to a specified proportion, then placing the tungsten powder, the copper powder and the binder into an internal mixer, and internally mixing for 20-30min at the temperature of 120-150 ℃; then crushing the material mass obtained by banburying, and preparing a tungsten alloy injection blank A through the processes of feeding injection molding, degreasing and sintering in sequence;
wherein, the mold temperature is 100-120 ℃, the degreasing temperature is 120-140 ℃, the degreasing time is 3-10h, and the sintering temperature is 1200-1400 ℃ during injection molding;
S2, accurately weighing 316L stainless steel powder and adhesive required by manufacturing 316L stainless steel according to a specified proportion, and carrying out banburying, crushing, injection molding, degreasing and sintering on the 316L stainless steel powder and the adhesive required by manufacturing 316L stainless steel in sequence by adopting the same steps as S1 to prepare a 316L stainless steel blank B;
Wherein, the mold temperature is 80-100 ℃ during injection molding, the degreasing temperature is 100-120 ℃, the degreasing time is 4-7h, and the sintering temperature is 1000-1200 ℃;
s3, placing the tungsten alloy injection blank A and the 316L stainless steel blank B in a sintering furnace, carrying out infiltration sintering in a microcomputer program-controlled high-temperature hydrogen atmosphere sintering furnace, and naturally cooling to room temperature; wherein the temperature in the hydrogen atmosphere sintering furnace is set to 1000-;
s4, placing the tungsten alloy sintered piece A obtained in the S3 in a single-chamber induction skull furnace, setting the temperature in the single-chamber induction skull furnace to 1400-;
S5, the tungsten alloy sintered piece A obtained by secondary sintering in the S4 and the 316L stainless steel sintered piece B are placed in a vacuum hot pressing furnace after being assembled, and hot pressing sintering treatment is carried out on the tungsten alloy sintered piece A and the 316L stainless steel sintered piece B under the condition that the temperature is 1350-1380 ℃ until the tungsten alloy sintered piece A and the 316L stainless steel sintered piece B are naturally welded into a whole, namely the diffusion welding of the tungsten alloy and the 316L stainless steel is completed.
2. the diffusion welding process of a tungsten alloy to 316L stainless steel of claim 1, wherein: and the degreasing agent in the S1 and S2 is selected from n-heptane or n-hexane.
3. the diffusion welding process of a tungsten alloy to 316L stainless steel of claim 1, wherein: the loading capacity of 316L stainless steel powder in the S2 is 90-95%, and the force is less than or equal to 30 mu m.
4. the diffusion welding process of a tungsten alloy to 316L stainless steel of claim 1, wherein: the adhesives used in the S1 and S2 comprise paraffin, high-density polyethylene, polypropylene and stearic acid, wherein the paraffin, the high-density polyethylene, the polypropylene and the stearic acid respectively account for 65%, 16% and 3% of the mass of the adhesives.
5. the diffusion welding process of a tungsten alloy to 316L stainless steel of claim 1, wherein: the sintering time in the S3 is 1-2 h.
6. the diffusion welding process of a tungsten alloy to 316L stainless steel of claim 1, wherein: and the sintering time in the S5 is 1h, and the pressure in the vacuum hot pressing furnace is set to be 20-40 MPa.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115156749A (en) * | 2022-07-06 | 2022-10-11 | 陕西斯瑞新材料股份有限公司 | Method for welding copper-tungsten and steel |
| CN115178852A (en) * | 2022-07-25 | 2022-10-14 | 合肥工业大学 | Diffusion bonding method for connecting tungsten and stainless steel |
| CN115178852B (en) * | 2022-07-25 | 2024-04-26 | 合肥工业大学 | Diffusion connection method for connecting tungsten and stainless steel |
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