CN114406388B - Tungsten copper and dissimilar metal welding structure and method - Google Patents
Tungsten copper and dissimilar metal welding structure and method Download PDFInfo
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- CN114406388B CN114406388B CN202210160623.XA CN202210160623A CN114406388B CN 114406388 B CN114406388 B CN 114406388B CN 202210160623 A CN202210160623 A CN 202210160623A CN 114406388 B CN114406388 B CN 114406388B
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- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000004021 metal welding Methods 0.000 title claims abstract description 8
- 238000003466 welding Methods 0.000 claims abstract description 91
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 16
- 230000004907 flux Effects 0.000 claims abstract description 12
- 238000004663 powder metallurgy Methods 0.000 claims abstract description 6
- 239000003302 ferromagnetic material Substances 0.000 claims abstract description 5
- 229910000679 solder Inorganic materials 0.000 claims description 49
- 230000000903 blocking effect Effects 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 13
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 11
- 229910052721 tungsten Inorganic materials 0.000 claims description 10
- 239000010937 tungsten Substances 0.000 claims description 10
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 9
- 230000008018 melting Effects 0.000 claims description 9
- 238000005219 brazing Methods 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 8
- 238000005245 sintering Methods 0.000 claims description 7
- 150000002739 metals Chemical class 0.000 claims description 2
- 239000007769 metal material Substances 0.000 claims 1
- 238000011112 process operation Methods 0.000 abstract description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 9
- 229910045601 alloy Inorganic materials 0.000 description 8
- 239000000956 alloy Substances 0.000 description 8
- 238000005476 soldering Methods 0.000 description 8
- 229910000833 kovar Inorganic materials 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 239000000843 powder Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 229910052593 corundum Inorganic materials 0.000 description 3
- 239000010431 corundum Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005488 sandblasting Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
-
- 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
- B23K1/00—Soldering, e.g. brazing, or unsoldering
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/18—Dissimilar materials
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention provides a tungsten copper and dissimilar metal welding structure and a method, wherein a first welding piece is provided with an assembly hole, and a second welding piece is inserted into the assembly hole; the first weldment is formed by a die in a powder metallurgy mode, and the die comprises a die body and an insert for forming a mounting hole; the insert comprises an insert body, an insert body and a template, wherein the insert body is detachably arranged between the insert body and the template, convex teeth are arranged on the outer wall of the template, the insert body and the template are made of ferromagnetic materials, and after the insert body is pulled out, the template is adsorbed by the insert body and separated from the assembly hole, so that a toothed groove is formed on the inner wall of the assembly hole; and the welding flux is melted in the welding seam between the second welding part and the assembly hole and fills the groove, so that the second welding part is occluded with the first welding part. The invention can reliably weld tungsten copper and dissimilar metal, and has simple and convenient process operation and high efficiency.
Description
Technical Field
The invention belongs to the technical field of metal welding, and particularly relates to a tungsten-copper and dissimilar metal welding structure.
Background
The tungsten-copper composite material is prepared by combining high-purity tungsten powder and high-conductivity copper powder with high purity and good plasticity, and refining the mixture through the processes of static pressure forming, high-temperature sintering and melting.
The tungsten-copper alloy integrates the advantages of metal tungsten and copper, wherein the tungsten has high melting point (the melting point of the tungsten is 3410 ℃, the melting point of the copper is 1080 ℃) and high density (the density of the tungsten is 19.25g/cm, and the density of the copper is 8.92/cm & lt 3 & gt); the copper has excellent electric and heat conducting performance, and the tungsten-copper alloy (the general component range is WCu 7-WCu 50) has uniform microstructure, high temperature resistance, high strength, electric arc ablation resistance and high density; the conductive and heat-conducting properties are moderate, and the material can be widely applied to military high-temperature-resistant materials, electric alloys for high-voltage switches, electric processing electrodes and microelectronic materials, and can be widely applied to industries such as aerospace, aviation, electronics, electric power, metallurgy, machinery, sports equipment and the like as parts and components.
In some special use environments, the characteristics of a single metal of tungsten and copper cannot meet the use requirements, two or more metals need to be combined in a special mode so as to meet the use space, and different regional functions are used to meet the environment requirements. For example, welding tungsten copper to a 4J29 alloy after assembly as shown in fig. 1 requires a high strength weld between the two.
Patent application publication No. CN112756779A describes a welding method of tungsten-copper alloy and thin plate kovar alloy, which comprises the following steps: s1, preparing intermediate layer welding flux, cleaning the cut intermediate layer welding flux, a Kovar support and a tungsten-copper heat sink, placing the intermediate layer welding flux at a position where the tungsten-copper heat sink needs to be connected, and placing the Kovar support above a soldering lug; s2, adjusting the position of a welding gun to enable a laser welding spot to be located at a position to be welded, adjusting laser welding energy and defocusing amount, and adjusting the position and angle of a laser to enable the welding spot to be located at a welding point; and S3, placing the integral structural member after laser welding on a heating table for heating, so that the welded Kovar support, the tungsten-copper heat sink and the intermediate layer welding flux in the previous step are placed on the heating table with preset temperature after the welding flux is molten, taking down the welding flux after the welding flux is sufficiently molten, carrying out heat preservation and stress removal treatment, and after welding is completed, placing the integral structural member in an oven for baking to realize the connection of the Kovar support and the tungsten-copper heat sink. This welding method is not suitable for weldment welding of the present application.
The patent publication No. CN112975307B discloses a method for improving the brazing strength of a tungsten copper part, which comprises the following steps: s1, pressing a tungsten blank; s2, forming: putting the pressed tungsten blank into a graphite crucible, putting a copper block to be infiltrated on the tungsten blank, and burying and tamping corundum powder to obtain a pre-sintered part; s3, sintering: placing the formed pre-sintered piece into an atmosphere protection molybdenum wire furnace for high-temperature sintering to obtain tungsten-copper alloy; s4, sand blasting: after the sintered tungsten-copper alloy is discharged from the furnace, sand blasting is carried out to remove the surface corundum powder, and a copper-clad layer with the thickness of 0.01-0.1mm is naturally formed on the surface of the tungsten-copper alloy; s5, vacuum brazing: and carrying out vacuum brazing on the tungsten-copper alloy subjected to sand blasting and stainless steel or Kovar alloy. The method adopts the ultra-thin copper-clad layer with the thickness of 0.01-0.1mm to be infiltrated on the surface of the tungsten blank, thereby effectively improving the welding strength between the tungsten-copper alloy and the stainless steel or the Kovar alloy, improving the brazing rate and effectively avoiding the welding defect caused by the non-infiltration of the tungsten-copper material. The welding method removes the corundum powder on the surface one by using a spray gun, wastes time and labor and has relatively complex process operation.
Disclosure of Invention
The invention aims to provide a tungsten copper and dissimilar metal welding structure, which is used for reliably welding tungsten copper and dissimilar metal and has the advantages of simple and convenient process operation and high efficiency.
The invention provides the following technical scheme:
a tungsten copper and dissimilar metal welding structure is used for welding a first welding part made of tungsten copper and a second welding part made of dissimilar metal, wherein an assembly hole is formed in the first welding part, and the second welding part is inserted into the assembly hole;
the first weldment is formed in a powder metallurgy mode through a die, and the die comprises a die body and an insert for forming a mounting hole;
the insert comprises an insert body, an insert and a template, wherein the insert is detachably arranged between the insert body and the template, convex teeth are arranged on the outer wall of the template, the insert body and the template are made of ferromagnetic materials, and after the insert is pulled out, the template is adsorbed by the insert body and separated from the assembling hole, so that a toothed groove is formed on the inner wall of the assembling hole;
and the welding flux is melted in the welding seam between the second welding part and the assembly hole and fills the groove, so that the second welding part is meshed with the first welding part.
Preferably, the cross section of the insert is rectangular, the inlay is tightly attached to the periphery of the insert body, and the plurality of templates are attached to the inlay in a split mode.
Preferably, the template comprises a first template and a second template which are respectively distributed along the longitudinal direction and the transverse direction, and the lengths of the upper ends and the lower ends of the first template in extension are as follows: and after the inlay is drawn out, the first template abuts against the end part of the second template.
Preferably, a plurality of teeth are formed on the outer wall of the second welding part, the teeth and the convex teeth are in one-to-one correspondence or staggered arrangement, and the teeth are filled with the molten solder.
Preferably, the cross section of the convex tooth is arc-shaped or conical, and the cross section of the tooth is arc-shaped or conical.
Furthermore, a solder hole is formed in the top of the first welding part, the solder hole is communicated with the assembly hole, the bottom of the assembly hole inclines to one side of the assembly hole, and the solder is arranged in the solder hole.
Preferably, a blocking eave is arranged between the solder hole and the assembling hole and used for blocking the solder from sliding into the assembling hole before melting, and a communicating hole is arranged below the blocking eave.
Preferably, the top of the template is provided with a convex strip for forming the communicating hole.
The welding method of the tungsten copper and the dissimilar metal comprises the following steps:
sintering and molding a first weldment by using the die in a powder metallurgy mode, pulling out the inlay, enabling the insert body to adsorb the template, enabling convex teeth of the template to be separated from the assembling hole, and forming a groove on the inner wall of the assembling hole;
and taking away the insert, assembling a second weldment in the assembling hole, applying solder at the assembling hole, enabling the solder to flow into the welding line and fill the groove, and brazing the second weldment on the first weldment.
Preferably, a welding material hole is formed in the top of the first welding part, the welding material hole is communicated with the assembling hole, the bottom of the welding material hole inclines towards one side of the assembling hole, and a blocking brim is arranged between the welding material hole and the assembling hole; the solder is arranged in the solder hole and is blocked by the blocking eave to prevent the solder from sliding downwards, and the solder flows into the welding line after being melted.
The invention has the beneficial effects that:
in order to reliably weld the first welding piece made of tungsten copper and dissimilar metal, a plurality of tooth-shaped grooves are formed in the assembly hole, and solder is melted in a welding seam between the second welding piece and the assembly hole and fills the grooves, so that the second welding piece is firmly meshed with the first welding piece.
The molding structure of pilot hole does: the insert of the first weldment mould is set to be of a split structure, the insert comprises an insert body, an inlay and a template, the inlay is detachably mounted between the insert body and the template, convex teeth are arranged on the outer wall of the template, the insert body and the template are made of ferromagnetic materials, after the first weldment is sintered and formed, the inlay is pulled out, the template is adsorbed by the insert body and separated from the inner wall of the assembly hole, and a toothed groove is formed in the inner wall of the assembly hole; a plurality of recess one-time molding and the drawing of patterns of pilot hole, production efficiency is high.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic view of an internal structure of an assembly of a first weldment and a second weldment according to embodiment 1 of the present invention;
FIG. 2 is a schematic view of an insert mold configuration for the first time a weldment is formed in accordance with the present invention;
FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;
FIG. 4 is a schematic cross-sectional view at B-B in FIG. 3;
FIG. 5 is a schematic diagram of the insert demolded after the inlay has been extracted, corresponding to C-C in FIG. 3;
FIG. 6 is a schematic top view of the assembly hole of the first weldment;
FIG. 7 is a schematic bottom view of the structure of FIG. 6;
FIG. 8 is a schematic view of the assembly of a second weldment and a first weldment of embodiment 2 of the invention before welding;
FIG. 9 is a schematic view of the assembly of a second weldment and a first weldment according to embodiment 2 of the invention after welding;
fig. 10 is a schematic view of the insert mold structure of example 3 of the present invention.
Labeled in the figure as: 1. welding a first weldment; 2. a second weldment; 3. an assembly hole; 4. embedding; 5. an insert body; 6. an inlay; 7. a template; 8. a convex tooth; 9. a first template; 10. a second template; 11. teeth; 12. a solder hole; 13. blocking eaves; 14. a communicating hole; 15. a convex strip; 16. a module; 17. and (3) soldering.
Detailed Description
Example 1
This example will be described by taking a 4J29 alloy as an example of the dissimilar metal.
The melting point of the tungsten-copper alloy selected in the embodiment is 1450 ℃, and the linear expansion coefficient is 5.5-5.8;
the 4J29 alloy has a melting point of 1420-1455 deg.C, a linear expansion coefficient of 4.6-5.2 at 20-450 deg.C, and a linear expansion coefficient of 5.1-5.5 at 450-600 deg.C, and the linear expansion coefficient gradually increases with the increase of temperature.
As shown in the figure, the welding structure of tungsten copper and dissimilar metal is used for welding a first welding piece 1 made of tungsten copper and a second welding piece 2 made of dissimilar metal, an assembly hole 3 is formed in the first welding piece 1, and the second welding piece 2 is inserted into the assembly hole 3.
Referring to fig. 1 and 2, a weldment one 1 is powder metallurgically formed from a die that includes a die body and an insert 4 for forming a mounting hole.
Referring to fig. 3, the insert 4 includes an insert body 5, an inlay 6, and a template 7. The insert body 5 and the template 7 are made of ferromagnetic materials. Inlay 6 detachably installs between insert body 5 and template 7, and inlay 6 is non-ferromagnetic alloy, and inlay 6 can be dismantled by drive arrangement is automatic.
The outer wall of the template 7 is provided with a plurality of convex teeth 8, after the inlay 6 is pulled out, the template 7 is adsorbed by the insert body 5 and separated from the inner wall of the assembly hole, so that a dentate groove which is profiled with the convex teeth 8 is formed on the inner wall of the assembly hole 3. During welding, the welding flux 17 is melted in the welding seam between the second welding part 2 and the assembly hole 3 and fills the groove, so that the second welding part and the first welding part are firmly meshed. The solder 17 may be a copper solder ball. The weldment is placed in the argon protective atmosphere in the brazing process, so that the weldment and the solder 17 are prevented from being oxidized to generate gas, and the gas is prevented from being generated at the welding seam due to the fact that the gas cannot escape in time in the rapid heat dissipation and cooling process of tungsten copper.
Referring to fig. 4 and 5, the cross section of the insert 4 is rectangular, the inlay 6 is tightly attached to the periphery of the insert body 5, and the four templates 7 are detachably attached to the inlay 6. The template 7 comprises a first template 9 and a second template 10 which are respectively distributed along the longitudinal direction and the transverse direction, and the lengths of the upper ends and the lower ends of the first template 9 are as follows: after the inlay 6 is extracted, the first template 9 abuts against the end of the second template 10. The structure enables the first template 9 and the second template 10 not to interfere with each other in the adsorption moving process, the first template 9 is abutted against the second template 10, the second template 10 is limited, the first template 9 and the second template 10 can be accurately and stably adsorbed and positioned on four edges of the insert body 5, and the second template is prevented from deflecting.
Referring to fig. 8 and 9, a plurality of teeth 11 are also formed on the outer wall of the second soldering part 2, the teeth 11 and the convex teeth 8 are arranged in a one-to-one correspondence or staggered manner, and the welding flux 17 is melted and then fills the teeth 11, so that the second soldering part 2 is more firmly engaged with the first soldering part 1.
The cross section of the convex tooth 8 is arc-shaped or conical, and the cross section of the tooth 11 is arc-shaped or conical.
Example 2
The embodiment can more conveniently apply the solder on the basis of the embodiment 1, so that the solder automatically fills the welding seam.
Referring to fig. 6 to 9, when the first soldering member 1 is sintered, a plurality of solder holes 12 are formed at the top of the first soldering member 1 along the periphery of the mounting holes 3, the solder holes 12 are communicated with the mounting holes 3, the bottom of the first soldering member is inclined downwards towards the side of the mounting holes 3, the solder 17 is placed in the solder holes 12, and the solder 17 flows into the welding seam along the inclined solder holes 12 after being melted.
Referring to fig. 7 and 8, a blocking ledge 13 is arranged between the solder hole 12 and the assembly hole 3 for blocking the solder 17 from sliding into the assembly hole 3 before melting, and a communication hole 14 is arranged below the blocking ledge 13 for communicating with the welding seam.
The forming mode of the blocking eaves 13 is as follows: convex ribs 15 are arranged on the top of the template 7, communication holes 14 are automatically formed at the convex ribs 15 after the template 7 is taken out, and a stop brim 13 is formed above the convex ribs 15. The mold is further provided with a mold piece 16 for molding the solder holes 12, the mold piece 16 can be integrally disassembled, the mold piece 16 is rectangular, and the bottom of the mold piece is provided with a bump corresponding to the solder hole 12 for molding the solder hole 12.
The other structure of this embodiment is the same as embodiment 1.
The welding method of the tungsten copper and the dissimilar metal comprises the following steps:
sintering and molding a weldment 1 by using powder metallurgy through a mold, after sintering and molding the weldment 1, pulling out the inlay 6 in the cooling process of the weldment (the specific temperature is selected adaptively so as not to damage the structure of the weldment and smooth demolding of a template at the same time), so that the inlay body 5 adsorbs the template 7, and at the moment, the weldment has high temperature, is not completely molded, is convenient for demolding the template 7, the convex teeth 8 of the template 7 are separated from the inner wall of the assembly hole 3, and a groove is formed on the inner wall of the assembly hole 3; a release agent can be coated on the outer wall of the template 7, so that the template is more convenient to separate from the assembly hole 3;
taking away the insert 4, and assembling the second weldment 2 in the assembling hole 3;
the solders 17 are respectively arranged in the solder holes 12 and are blocked by the blocking eaves 13 to prevent the solders from sliding downwards;
in the brazing process, the solder 17 is melted and then automatically flows downwards into the weld joint to fill the groove, and the weldment two 2 is brazed on the weldment one 1 and is tightly occluded with the weldment one 1.
Example 3
Referring to fig. 10, this embodiment is different from embodiment 1 in that the insert body 5, the inlay 6, and the mold plate 7 are made of die steel, the top of the mold plate 7 is protruded out of the fitting hole 3, and the inlay 6 is pulled out during the first cooling of the weldment during the demolding, and the upper side of the mold plate 7 is pushed inward by a driving device such as a hydraulic cylinder, so that the mold plate 7 is tightly attached to the insert body 5, thereby achieving the demolding.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a tungsten copper and dissimilar metal welded structure for with the weldment two welding of the weldment one of tungsten copper material and dissimilar metal material, its characterized in that:
the first weldment is provided with an assembly hole, and the second weldment is inserted into the assembly hole;
the first weldment is formed in a powder metallurgy mode through a mould, and the mould comprises a mould main body and an insert for forming a mounting hole;
the insert comprises an insert body, an insert and a template, wherein the insert is detachably arranged between the insert body and the template, convex teeth are arranged on the outer wall of the template, the insert body and the template are made of ferromagnetic materials, and after the insert is pulled out, the template is adsorbed by the insert body and separated from the assembling hole, so that a toothed groove is formed on the inner wall of the assembling hole;
the welding flux is melted in the welding seam between the second weldment and the assembly hole and fills the groove, so that the second weldment is meshed with the first weldment;
the cross section of the insert is rectangular, the inlay is tightly attached to the periphery of the insert body, and the plurality of templates are attached to the inlay in a split mode;
a solder hole is formed in the top of the first weldment, the solder hole is communicated with the assembly hole, the bottom of the solder hole inclines towards one side of the assembly hole, and the solder is arranged in the solder hole;
a blocking eave is arranged between the solder hole and the assembling hole and used for blocking the solder from sliding into the assembling hole before melting, and a communicating hole is arranged below the blocking eave; and raised lines are arranged at the top of the template and used for forming the communicating holes.
2. The structure for welding tungsten and copper and dissimilar metals according to claim 1, wherein said die plate includes a first die plate and a second die plate which are respectively distributed in a longitudinal direction and a transverse direction, and the lengths of the upper end and the lower end of the first die plate are as follows: and after the inlay is drawn out, the first template abuts against the end part of the second template.
3. A structure for welding tungsten-copper and a dissimilar metal according to claim 1, wherein a plurality of teeth are formed on an outer wall of said second welding member, said teeth and said convex teeth are provided in a one-to-one correspondence or in a staggered manner, and said teeth are filled with said molten solder.
4. A tungsten-copper and dissimilar metal welding structure according to claim 3, wherein said teeth are arcuate or tapered in cross section, and said teeth are arcuate or tapered in cross section.
5. A welding method of tungsten copper and a dissimilar metal, which is achieved by the welding structure of any one of claims 1 to 4, comprising the steps of:
sintering and molding a first weldment by using the die in a powder metallurgy mode, pulling out the inlay, enabling the insert body to adsorb the template, enabling convex teeth of the template to be separated from the assembling hole, and forming a groove on the inner wall of the assembling hole;
and taking away the insert, assembling a second weldment in the assembling hole, applying solder at the assembling hole, enabling the solder to flow into the welding line and fill the groove, and brazing the second weldment on the first weldment.
6. The welding method according to claim 5, characterized in that a welding material hole is formed in the top of the first welding part, the welding material hole is communicated with the assembly hole, the bottom of the welding material hole inclines towards one side of the assembly hole, and a blocking brim is arranged between the welding material hole and the assembly hole; the solder is arranged in the solder hole and is blocked by the blocking eave to prevent the solder from sliding downwards, and the solder flows into the welding line after being melted.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210160623.XA CN114406388B (en) | 2022-02-21 | 2022-02-21 | Tungsten copper and dissimilar metal welding structure and method |
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| CN202210160623.XA CN114406388B (en) | 2022-02-21 | 2022-02-21 | Tungsten copper and dissimilar metal welding structure and method |
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| CN114406388A CN114406388A (en) | 2022-04-29 |
| CN114406388B true CN114406388B (en) | 2023-04-07 |
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| CN101494322B (en) * | 2009-02-27 | 2010-08-11 | 西安交通大学 | Tungsten copper connection method |
| CN203725998U (en) * | 2014-03-21 | 2014-07-23 | 浙江三花股份有限公司 | Welding assembly and valve body |
| CN206356751U (en) * | 2016-12-30 | 2017-07-28 | 深圳市晟达真空钎焊技术有限公司 | metal sleeve solder preset structure |
| CN109454321B (en) * | 2018-11-16 | 2020-06-16 | 中南大学 | Hot isostatic pressing diffusion connection method for tungsten/steel cylinder structural member |
| CN209100814U (en) * | 2018-11-23 | 2019-07-12 | 马鞍山仪达空调有限公司 | A kind of pipelines of automobile air conditioner connector |
| CN110170719A (en) * | 2018-12-11 | 2019-08-27 | 苏州赛特锐精密机械配件有限公司 | A kind of method that kovar alloy couples with tungsten-copper alloy |
| CN215410797U (en) * | 2021-08-17 | 2022-01-04 | 新昌县润达机械有限公司 | Spiral line stainless steel silencer |
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