CN109014549A - A kind of diffusion welding connection method for making composite interlayer using Cu foil and Ti foil - Google Patents
A kind of diffusion welding connection method for making composite interlayer using Cu foil and Ti foil Download PDFInfo
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- CN109014549A CN109014549A CN201810770417.4A CN201810770417A CN109014549A CN 109014549 A CN109014549 A CN 109014549A CN 201810770417 A CN201810770417 A CN 201810770417A CN 109014549 A CN109014549 A CN 109014549A
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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
- B23K20/001—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by extrusion or drawing
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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
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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
- B23K20/22—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded
- B23K20/233—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded without ferrous layer
-
- 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
- B23K20/24—Preliminary treatment
Abstract
A kind of diffusion welding connection method for making composite interlayer using Cu foil and Ti foil, the present invention are to be related to connecting nickel base superalloy and Ti2AlNb alloy or Ti3The method of Al based alloy.Method: by nickel base superalloy and Ti2AlNb alloy or Ti3Al based alloy is processed into required size, and is polished, polishing treatment；Oxidation film process is removed to copper foil and Ti foil, and is cleaned by ultrasonic together with being put into acetone by weldering base material；Copper foil is contacted with nickel base superalloy, titanium foil and Ti2AlNb alloy or Ti3The contact of Al based alloy, obtaining structure is Ti2AlNb alloy or Ti3Al based alloy/titanium foil/copper foil/nickel base superalloy is put into welded piece in vacuum furnace by weldering testpieces, applies pressure, completes welding after heated, heat preservation, cooling thermal cycle.The present invention can reduce welding temperature, the formation of the brittlement phase in control joint, improve joint performance.The connector room temperature shearing strength of acquisition reaches 240~310MPa.
Description
Technical field
The present invention is a kind of diffusion welding connection method for making composite interlayer using Cu foil and Ti foil, belongs to welding technique
Field.
Background technique
Intermatallic Ti-Al compound has density low, high specific strength, specific stiffness, good inoxidizability, creep resistant,
The advantages that anti-fatigue performance is good is aerospace one of lightweight high-temperature structural material of the following most application potential.In titanium aluminium
In intermetallic compound, Ti2AlNb alloy or Ti3The research of Al based alloy is taken seriously, and operating temperature can achieve 700
℃.Compared with common alloy of titanium, Ti2AlNb alloy or Ti3Al based alloy can be on active service at higher temperatures；With nickel-base high-temperature
Alloy is compared, they have lower density, the about half of nickel base superalloy.It is available in auto industry field
Ti2AlNb alloy or Ti3The characteristics of Al based alloy low-density high-strength, realizes the light-weight design and manufacture of components；It navigates in aviation
Its field, utilizes Ti2AlNb alloy or Ti3Al based alloy part substitute nickel base superalloy, it can be achieved that component loss of weight about
40%, there is important meaning to the effective range and effective launch load of the thrust ratio and aerospace craft for improving aero-engine
Justice.
In order to realize Ti2AlNb alloy or Ti3Al based alloy part substitutes nickel base superalloy, and then promotes it in aviation
The engineer application of space industry, it is necessary to solution Ti first2AlNb alloy or Ti3The xenogenesis of Al based alloy and nickel base superalloy connects
Connect problem.But the physical property and chemical component difference of these two types of materials are big, and the difference of base material chemical component causes to be difficult to find that
There is the solder of excellent compatibility simultaneously with two kinds of base materials, the formation of frangible compounds is difficult to avoid that in connector；Two kinds of base materials
Thermal expansion coefficient is easy to generate certain residual thermal stress within a fitting there are larger difference, and then forms crackle, causes to connect
Head penalty；There is stronger affinity between element ti and Ni, easily react and generate Ti2Ni、TiNi、Ti3Ni etc.
A variety of Ti-Ni series intermetallic compounds, the mechanical property of these brittlement phases meeting severe exacerbation connector.Realize Ti2AlNb is closed
Gold or Ti3The connection of the xenogenesis of Al based alloy and nickel base superalloy is extremely difficult, is difficult to realize connect using conventional fusion welding method
The special joinings method such as connect, therefore generally use soldering, diffusion welding (DW).
There is researcher using NiCuNbCr alloy, Ti37~39- Nb alloy, Ti-7.3~9.3Nb-51.5~54.5Ni (wt.%)
Alloy is solder, has studied Ti3Al based alloy is connect with the argon arc welding of GH4169 nickel base superalloy, but is formd in connector
More Ni-Ti system, Al- (Ni, Cu)-Ti system frangible compounds, and micro-crack is had found within a fitting, connector room temperature tensile
Intensity only has 200MPa, and (Chen Bingqing, bear Warburg Pincus, Guo Shaoqing wait NiCuNbCr solder Ti3The welding of Al/GH4169 alloy for argon-arc
The tissue and performance [J] material engineering of head, 2014,4:13-18.).Chen Bo etc. is with Ti-13Zr-21Cu-9Ni (wt.%) pricker
Material has been brazed Ti3Al based alloy and GH536 nickel base superalloy form the brittleness chemical combination such as more Ti-Ni, Ti-Fe in connector
Object causes to form longitudinal crack in the brazed seam close to GH536 matrix side, severe exacerbation joint performance, 960 DEG C/
5min specification lower contact shearing strength only has 86MPa, and (Chen Bo, bear Warburg Pincus, Mao Wei wait using Ti-Zr-Cu-Ni vacuum brazing
Ti3Al/Ti3Al and Ti3Al/GH536 joint microstructure and performance [J] aeronautical material journal, 2010,30 (5): 35-38.).
Connection Ti is spread as middle layer using Mo foil2When AlNb alloy and GH4169 high temperature alloy, it is unable to get and completely connects
Head can form integrity of welded joint, but crackle (Qian Jinwen, Hou Jin occurs in the interface GH4169 when doing middle layer with Ta, Nb
It protects, Li Jinglong waits .Ti2AlNb/GH4169 diffusion in vacuum connects Primary Study [J] heat processing technique, 2008,37 (13):
90-92)；Seawater etc. is appointed to have studied Ti using Ni foil and Ti-Ni-Nb alloy as middle layer3Al based alloy and GH536 nickel-base high-temperature
The diffusion welding (DW) of alloy, the joint bending stiffness obtained under 980 DEG C/20min/20MPa specification is about 210MPa, strength of joint
(H. S.Ren, X.Wu, B.Chen, et al.Microstructures and mechanical properties to be improved
of Ti3Al/Ni-basedsuperalloy joints diffusion bonded with Ni and TiNiNb foils,
Welding in the World,2017,61:375-381).Patent (CN101352772A) has invented a kind of diffusion connection
The method of TiAl/Nb based alloy and Ni based high-temperature alloy, in the patent the method, welding temperature reaches 1100 DEG C, and pressure is most
Big 30MPa, soaking time is in 60~120min.Due to Ti2AlNb alloy or Ti3The solid solution temperature of Al based alloy about exists
In the range of 980 DEG C~1020 DEG C, so high welding temperature and soaking time in the patent, it is likely that Ti can be damaged2AlNb
Alloy or Ti3The acquisition of the tissue and performance of Al based alloy base material, good joint performance cannot be to sacrifice the performance of base material as generation
Valence.
Above-mentioned is about nickel base superalloy and Ti2AlNb alloy or Ti3The main research progress of Al based alloy connection, mesh
The preceding research both at home and abroad about the field is reported also than relatively limited.As noted previously, as two kinds of base materials are in ingredient and aspect of performance
In the presence of very big difference, internal stress is easily caused in connector, and form frangible compounds.If can make to be welded base material compared with
Isothermal treatment for short time connects under low temperature, so that it may inhibit the formation of intermetallic compound to a certain extent and grow up, and then reduce and connect
Head brittleness tendency.In addition, lower welding temperature can also reduce the internal stress because of caused by base material thermal expansion coefficient difference, from
And realize the good connection of two kinds of materials, obtain high bonding strength.And reduce Thermal Cycle to base material, especially
Ti2AlNb alloy or Ti3The influence of Al based alloy tissue and performance.
Summary of the invention
The present invention is exactly directed to above-mentioned problems of the prior art and designs and provide a kind of use Cu foil and Ti foil
The diffusion welding connection method for making composite interlayer, the purpose is to be no more than 30 no more than 1000 DEG C, soaking time in welding temperature
Under conditions of minute, nickel base superalloy and Ti are realized2AlNb alloy or Ti3Al based alloy good connection, joint bending stiffness
More than 300MPa, while avoiding Thermal Cycle to Ti2AlNb alloy or Ti3The tissue and performance of Al based alloy base material cause not
Good influence.
The purpose of the present invention is achieved through the following technical solutions:
The step of this kind makees the diffusion welding connection method of composite interlayer using Cu foil and Ti foil, this method is as follows:
Step 1: using wire cutting by nickel base superalloy and Ti2AlNb alloy or Ti3Al based alloy is processed into required
Size is polished by the surface to be welded of weldering base material with sand paper, is then processed by shot blasting, obtains being welded base material；
Step 2: oxidation film process is removed to the copper foil with a thickness of 10~30 μm, to 30~50 μm of titanium foil of thickness
It is removed oxidation film process, obtains diffusion welding (DW) middle layer；
Step 3: inciting somebody to action, treated is put into 3~10min of ultrasonic cleaning in acetone by weldering base material, copper foil and Ti foil；
Step 4: copper foil is covered on the surface to be welded of nickel base superalloy, titanium foil is covered in Ti2AlNb alloy or
Ti3On the surface to be welded of Al based alloy, obtaining structure is Ti2AlNb alloy or Ti3Al based alloy/titanium foil/copper foil/nickel-base high-temperature closes
The welded piece of gold；
Step 5: welded piece is put in vacuum furnace, and apply the pressure of 5~15MPa, works as vacuum furnace
In vacuum degree reach 9 × 10-2~1 × 10-3Heating is initially powered up after Pa, the rate of heat addition is 5~15 DEG C/min, is heated to
10~30min is kept the temperature at 850 DEG C~1000 DEG C at such a temperature, then is cooled to 400 DEG C~500 with the speed of 5~10 DEG C/min
DEG C, it is then furnace-cooled to room temperature, i.e. completion nickel base superalloy and Ti2AlNb alloy or Ti3The xenogenesis of Al based alloy connects.
Further, use volume ratio for 1: 9 HNO3、H2O solution is removed oxidation film process, etching time to copper foil
30~60s.
Further, use volume ratio for 1: 3: 21 HF, HNO3、H2O solution is removed oxidation film process to titanium foil, rotten
Lose 30~60s of time.
Further, in step 2 copper foil used with a thickness of 20 μm and titanium foil with a thickness of 30 μm.
Further, apply the pressure of 10MPa in step 5.
Further, in step 5, when the vacuum degree in vacuum furnace reaches 1 × 10-3Heating is initially powered up after Pa.
Further, the rate of heat addition in step 5 is 10 DEG C/min.
Further, it in step 5, is heated to starting to keep the temperature at 900 DEG C, soaking time 20min.
Further, cooling with the speed of 6 DEG C/min in step 5, room temperature is cooled to the furnace after being cooled to 400 DEG C.
Technical solution of the present invention has the advantages that
(1) test result of early period is shown, element ti is easy to react with nickel base superalloy, is formed more complicated more
First object phase, butt joint performance cause adverse effect.Titanium foil is placed in Ti by technical solution of the present invention2AlNb alloy or Ti3Al base
Alloy side is separated titanium foil and nickel base superalloy using copper foil, using " Ti2AlNb alloy or Ti3Al based alloy/titanium foil/
The joint structure of copper foil/nickel base superalloy " can avoid the formation of complicated pluralism object phase.In addition, Ti2AlNb alloy or Ti3Al
Essential element is Ti in based alloy, can sufficiently be dissolved each other with titanium foil；Element Cu is dissolved each other completely with Ni, so copper foil can be with nickel
Based high-temperature alloy forms good connection.The selection of Cu/Ti composite interlayer in the present invention, has fully considered the spy of two kinds of base materials
Compatibility between sign and element.
(2) as previously mentioned, carrying out nickel base superalloy and Ti2AlNb alloy or Ti3When the connection of Al based alloy, connector
In residual thermal stress and frangible compounds easy to form.The present invention proposes to carry out two kinds of materials using Cu/Ti composite interlayer
Diffusion connection, between copper foil and nickel base superalloy, titanium foil and Ti2AlNb alloy or Ti3It is all that phase occurs between Al based alloy
Capacitive reaction, can obviously reduce the formability of compound, help to obtain good connection；Meanwhile between copper foil and titanium foil
It is easy to happen reaction.Therefore, the requirement to welding conditions is reduced, two kinds of base materials (can be no more than at relatively low temperatures
1000 DEG C), progress (is no more than 30min) in short-term, and good connection can be realized in heat preservation.In addition, Ti2AlNb alloy or Ti3Al base
For the solid solution temperature of alloy about in the range of 980 DEG C~1020 DEG C, relatively low welding temperature can avoid or reduce weldering
It connects thermal cycle and adverse effect is caused to base material tissue and performance.
(3) copper foil used in the present invention and titanium foil are all relatively thin (10~50 μm), it is ensured that sufficiently participate in connection procedure
Reaction, noresidue copper foil or titanium foil exist after welding, can avoid pure metal layer and damage joint performance；
(4) in the technical solution of the present invention, by further adjusting and controlling copper foil and titanium foil, copper foil and nickel-base high-temperature
The extent of reaction of alloy can make two kinds of metal foils sufficiently participate in reacting, while inhibit or avoiding titanium foil, Ti2AlNb alloy or
Ti3Al based alloy is reacted with the direct of nickel base superalloy, and the presence of hard crisp object phase, obtains preferable connector in control joint
Tissue, the present invention obtain nickel base superalloy and Ti2AlNb alloy or Ti3The xenogenesis connector room temperature tensile strength of Al based alloy reaches
To 240~310MPa.
(5) since copper foil and the oxidation film on titanium foil surface can cause adverse effect to weld interface, in the technology of the present invention side
In case, use volume ratio for 1: 9 HNO3、H2HF, HNO that O solution and volume ratio are 1: 3: 213、H2O solution can be effective respectively
The oxidation film of copper foil and titanium foil surface is removed, while avoiding damaging very thin copper foil and titanium foil；
When the vacuum degree in vacuum furnace reaches 1 × 10-3It is initially powered up heating after Pa, can effectively avoid temperature-rise period
In cause the re-oxidation of copper foil and titanium foil；
Since two kinds of thermal expansion coefficients by weldering base material are there are larger difference, the faster cooling velocity of postwelding can make connector
It is middle to generate very big internal stress, and then lead to microcrack initiation, in technical method of the invention, drop is controlled after heat preservation
Warm rate can effectively reduce the internal stress in connector, advantageously ensure that and connect when connector is cooling with the rate of temperature fall of 6 DEG C/min
Head performance.
Specific embodiment
Embodiment one, using copper foil and titanium foil as composite interlayer to nickel base superalloy and Ti3Al based alloy is expanded
Welding is dissipated, the welding process is as follows:
Step 1: using wire cutting by nickel base superalloy and Ti3Al based alloy is processed into required size, uses sand paper
Then polishing is processed by shot blasting by the surface to be welded of weldering base material, is obtained being welded base material；
Step 2: use volume ratio for 1: 9 HNO3、H2O solution is removed oxidation film to the copper foil with a thickness of 30 μm
Processing, etching time 30s, use volume ratio for 1: 3: 21 HF, HNO3、H2O solution removes the titanium foil with a thickness of 40 μm
Oxide film dissolving processing, etching time 50s obtain diffusion welding (DW) middle layer；
Step 3: inciting somebody to action, treated is put into acetone by weldering base material, copper foil and Ti foil and is cleaned by ultrasonic 10min；
Step 4: copper foil is covered on the surface to be welded of nickel base superalloy, titanium foil is covered in Ti3Al based alloy
On surface to be welded, obtaining structure is Ti3Al based alloy/titanium foil/copper foil/nickel base superalloy welded piece；
Step 5: welded piece is put in vacuum furnace, and apply the pressure of 10MPa, when in vacuum furnace
Vacuum degree reaches 1 × 10-3It is initially powered up heating after Pa, the rate of heat addition is 10 DEG C/min, when being heated to 900 DEG C at such a temperature
Keep the temperature 20min, then be cooled to 500 DEG C with the speed of 5 DEG C/min, be then furnace-cooled to room temperature, i.e., completion nickel base superalloy with
Ti3The xenogenesis of Al based alloy connects.
The Ti of acquisition3The microstructure picture of Al/GH536 nickel base superalloy Diffusion Bonded Joint, linkage interface form
Good metallurgical bonding, without any defect, and Ti3Al based alloy base material tissue is not influenced by Thermal Cycle.
Embodiment two, using copper foil and titanium foil as composite interlayer to nickel base superalloy and Ti3Al based alloy is expanded
Welding is dissipated, the welding process is as follows:
Step 1: using wire cutting by nickel base superalloy and Ti3Al based alloy is processed into required size, uses sand paper
Then polishing is processed by shot blasting by the surface to be welded of weldering base material, is obtained being welded base material；
Step 2: use volume ratio for 1: 9 HNO3、H2O solution is removed oxidation film to the copper foil with a thickness of 20 μm
Processing, etching time 20s, use volume ratio for 1: 3: 21 HF, HNO3、H2O solution removes the titanium foil with a thickness of 30 μm
Oxide film dissolving processing, etching time 30s obtain diffusion welding (DW) middle layer；
Step 3: inciting somebody to action, treated is put into acetone by weldering base material, copper foil and Ti foil and is cleaned by ultrasonic 10min；
Step 4: copper foil is covered on the surface to be welded of nickel base superalloy, titanium foil is covered in Ti3Al based alloy
On surface to be welded, obtaining structure is Ti3Al based alloy/titanium foil/copper foil/nickel base superalloy welded piece；
Step 5: welded piece is put in vacuum furnace, and apply the pressure of 8MPa, when in vacuum furnace
Vacuum degree reaches 1 × 10-3It is initially powered up heating after Pa, the rate of heat addition is 10 DEG C/min, when being heated to 900 DEG C at such a temperature
Keep the temperature 10min, then be cooled to 400 DEG C with the speed of 5 DEG C/min, be then furnace-cooled to room temperature, i.e., completion nickel base superalloy with
Ti3The xenogenesis of Al based alloy connects.
Embodiment three, using copper foil and titanium foil as composite interlayer to nickel base superalloy and Ti2AlNb alloy is expanded
Welding is dissipated, the welding process is as follows:
Step 1: using wire cutting by nickel base superalloy and Ti2AlNb alloy is processed into required size, uses sand paper
Then polishing is processed by shot blasting by the surface to be welded of weldering base material, is obtained being welded base material；
Step 2: use volume ratio for 1: 9 HNO3、H2O solution is removed oxidation film to the copper foil with a thickness of 20 μm
Processing, etching time 20s, use volume ratio for 1: 3: 21 HF, HNO3、H2O solution removes the titanium foil with a thickness of 30 μm
Oxide film dissolving processing, etching time 30s obtain diffusion welding (DW) middle layer；
Step 3: inciting somebody to action, treated is put into acetone by weldering base material, copper foil and Ti foil and is cleaned by ultrasonic 10min；
Step 4: copper foil is covered on the surface to be welded of nickel base superalloy, titanium foil is covered in Ti2AlNb alloy
On surface to be welded, obtaining structure is Ti2AlNb alloy/titanium foil/copper foil/nickel base superalloy welded piece；
Step 5: welded piece is put in vacuum furnace, and apply the pressure of 8MPa, when in vacuum furnace
Vacuum degree reaches 1 × 10-3It is initially powered up heating after Pa, the rate of heat addition is 10 DEG C/min, when being heated to 900 DEG C at such a temperature
Keep the temperature 10min, then be cooled to 400 DEG C with the speed of 5 DEG C/min, be then furnace-cooled to room temperature, i.e., completion nickel base superalloy with
Ti2The xenogenesis of AlNb alloy connects.
Example IV, using copper foil and titanium foil as composite interlayer to nickel base superalloy and Ti2AlNb alloy is expanded
Welding is dissipated, the welding process is as follows:
Step 1: using wire cutting by nickel base superalloy and Ti2AlNb alloy is processed into required size, uses sand paper
Then polishing is processed by shot blasting by the surface to be welded of weldering base material, is obtained being welded base material；
Step 2: use volume ratio for 1: 9 HNO3、H2O solution is removed oxidation film to the copper foil with a thickness of 30 μm
Processing, etching time 30s, use volume ratio for 1: 3: 21 HF, HNO3、H2O solution removes the titanium foil with a thickness of 40 μm
Oxide film dissolving processing, etching time 40s obtain diffusion welding (DW) middle layer；
Step 3: inciting somebody to action, treated is put into acetone by weldering base material, copper foil and Ti foil and is cleaned by ultrasonic 10min；
Step 4: copper foil is covered on the surface to be welded of nickel base superalloy, titanium foil is covered in Ti2AlNb alloy
On surface to be welded, obtaining structure is Ti2AlNb alloy/titanium foil/copper foil/nickel base superalloy welded piece；
Step 5: welded piece is put in vacuum furnace, and apply the pressure of 15MPa, when in vacuum furnace
Vacuum degree reaches 1 × 10-3It is initially powered up heating after Pa, the rate of heat addition is 10 DEG C/min, when being heated to 980 DEG C at such a temperature
Keep the temperature 10min, then be cooled to 500 DEG C with the speed of 8 DEG C/min, be then furnace-cooled to room temperature, i.e., completion nickel base superalloy with
Ti2The xenogenesis of AlNb alloy connects.
Claims (9)
1. a kind of the step of diffusion welding connection method for making composite interlayer using Cu foil and Ti foil, this method, is as follows:
Step 1: using wire cutting by nickel base superalloy and Ti2AlNb alloy or Ti3Al based alloy is processed into required size,
It is polished with sand paper by the surface to be welded of weldering base material, is then processed by shot blasting, obtains being welded base material；
Step 2: being removed oxidation film process to the copper foil with a thickness of 10~30 μm, 30~50 μm of thickness of titanium foils are carried out
It goes oxide film dissolving to handle, obtains diffusion welding (DW) middle layer；
Step 3: inciting somebody to action, treated is put into 3~10min of ultrasonic cleaning in acetone by weldering base material, copper foil and Ti foil；
Step 4: copper foil is covered on the surface to be welded of nickel base superalloy, titanium foil is covered in Ti2AlNb alloy or Ti3Al base
On the surface to be welded of alloy, obtaining structure is Ti2AlNb alloy or Ti3Al based alloy/titanium foil/copper foil/nickel base superalloy is welded
Workpiece；
Step 5: welded piece is put in vacuum furnace, and apply the pressure of 5~15MPa, when true in vacuum furnace
Reciprocal of duty cycle reaches 9 × 10-2~1 × 10-3Be initially powered up heating after Pa, the rate of heat addition is 5~15 DEG C/min, be heated to 850 DEG C~
10~30min is kept the temperature at 1000 DEG C at such a temperature, then is cooled to 400 DEG C~500 DEG C with the speed of 5~10 DEG C/min, then
It is furnace-cooled to room temperature, i.e. completion nickel base superalloy and Ti2AlNb alloy or Ti3The xenogenesis of Al based alloy connects.
2. the diffusion welding connection method according to claim 1 for being made composite interlayer using Cu foil and Ti foil, feature are existed
In: use volume ratio for 1: 9 HNO3、H2O solution is removed oxidation film process, 30~60s of etching time to copper foil.
3. the diffusion welding connection method according to claim 1 for being made composite interlayer using Cu foil and Ti foil, feature are existed
In: use volume ratio for 1: 3: 21 HF, HNO3、H2O solution is removed oxidation film process to titanium foil, and etching time 30~
60s。
4. the diffusion welding connection method according to claim 1 for being made composite interlayer using Cu foil and Ti foil, feature are existed
In: in step 2 copper foil used with a thickness of 20 μm and Ti foil with a thickness of 30 μm.
5. the diffusion welding connection method according to claim 1 for being made composite interlayer using Cu foil and Ti foil, feature are existed
In: apply the pressure of 10MPa in step 5.
6. the diffusion welding connection method according to claim 1 for being made composite interlayer using Cu foil and Ti foil, feature are existed
In: in step 5, when the vacuum degree in vacuum furnace reaches 1 × 10-3Heating is initially powered up after Pa.
7. the diffusion welding connection method according to claim 1 for being made composite interlayer using Cu foil and Ti foil, feature are existed
In: the rate of heat addition in step 5 is 10 DEG C/min.
8. the diffusion welding connection method according to claim 1 for being made composite interlayer using Cu foil and Ti foil, feature are existed
In: in step 5, it is heated to starting to keep the temperature at 900 DEG C, soaking time 20min.
9. the diffusion welding connection method according to claim 1 for being made composite interlayer using Cu foil and Ti foil, feature are existed
In: with the speed cooling of 6 DEG C/min in step 5, room temperature is cooled to the furnace after being cooled to 400 DEG C.
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| CN110577408A (en) * | 2019-09-06 | 2019-12-17 | 成都理工大学 | Method for connecting GH625 nickel-based superalloy and Al2O3 ceramic |
| CN111496414A (en) * | 2020-04-01 | 2020-08-07 | 武汉工程大学 | Graphite and copper joint and preparation method thereof |
| CN111531264A (en) * | 2020-04-01 | 2020-08-14 | 武汉工程大学 | Graphite and titanium alloy joint and preparation method thereof |
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| CN111496414B (en) * | 2020-04-01 | 2022-04-29 | 武汉工程大学 | Graphite and copper joint and preparation method thereof |
| CN111531264A (en) * | 2020-04-01 | 2020-08-14 | 武汉工程大学 | Graphite and titanium alloy joint and preparation method thereof |
| CN111531264B (en) * | 2020-04-01 | 2021-11-05 | 武汉工程大学 | Graphite and titanium alloy joint and preparation method thereof |
| CN111496414A (en) * | 2020-04-01 | 2020-08-07 | 武汉工程大学 | Graphite and copper joint and preparation method thereof |
| CN115255606A (en) * | 2022-06-21 | 2022-11-01 | 北京科技大学 | Copper and graphite diffusion bonding method containing aluminum interlayer |
| CN115255606B (en) * | 2022-06-21 | 2023-07-25 | 北京科技大学 | Diffusion connection method for copper and graphite of aluminum-containing intermediate layer |
| CN115178850A (en) * | 2022-06-22 | 2022-10-14 | 西北工业大学 | Low-temperature small-deformation diffusion welding method for metal material |
| CN115178850B (en) * | 2022-06-22 | 2024-02-02 | 西北工业大学 | Low-temperature small-deformation diffusion welding method for metal material |
| CN116161979A (en) * | 2023-02-24 | 2023-05-26 | 哈尔滨工业大学 | Method for connecting Ti-Al-C system MAX phase ceramic and zirconium alloy |
| CN116161979B (en) * | 2023-02-24 | 2023-12-08 | 哈尔滨工业大学 | Method for connecting Ti-Al-C system MAX phase ceramic and zirconium alloy |
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