CN107486619A - TZM and WRe xenogenesis refractory alloys a kind of SPS diffusion welding methods - Google Patents

TZM and WRe xenogenesis refractory alloys a kind of SPS diffusion welding methods Download PDF

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Publication number
CN107486619A
CN107486619A CN201710765714.5A CN201710765714A CN107486619A CN 107486619 A CN107486619 A CN 107486619A CN 201710765714 A CN201710765714 A CN 201710765714A CN 107486619 A CN107486619 A CN 107486619A
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China
Prior art keywords
alloys
tzm
wre
xenogenesis
refractory
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Inventor
张久兴
杨芝
韩翠柳
胡可
杨新宇
李志�
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Hefei University of Technology
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Hefei University of Technology
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/02Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of a press ; Diffusion bonding
    • B23K20/023Thermo-compression bonding
    • B23K20/026Thermo-compression bonding with diffusion of soldering material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/22Non-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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/24Preliminary treatment

Abstract

The invention provides a kind of TZM and the SPS diffusion welding methods of WRe xenogenesis refractory alloys, is using vanadium paper tinsel as intermediate layer, carries out solid-state diffusion welding by SPS Technique on T ZM alloys and WRe alloys, obtain TZM and WRe xenogenesis refractory alloys connector.While can ensureing that mother metal does not recrystallize by the welding method of the present invention, intensity height, TZM the and WRe xenogenesis refractory alloy weldments of forming are obtained, joint room temperature shear strength is up to 234MPa.

Description

TZM and WRe xenogenesis refractory alloys a kind of SPS diffusion welding methods
Technical field
The present invention relates to a kind of welding method of xenogenesis refractory alloy, more particularly to a kind of TZM and WRe xenogenesis refractory alloys Welding method.
Background technology
TZM alloys are the refractory alloys formed using molybdenum as matrix addition alloying element (such as Ti, Zr), are tied again with high Brilliant temperature, excellent mechanical behavior under high temperature and good corrosion resistance, have been obtained extensively in fields such as Aeronautics and Astronautics, nuclear energy Using such as:Utilize its excellent mechanical behavior under high temperature, nozzle, the torpedo of radiation panel, rocket engine available for spacecraft Distribution valve body of high temperature etc. is born in engine;Using its higher fusing point, available for the perforating head of seamless stainless steel, high temperature The high-temperature structural material such as the furnace wall of stove and the heat screen of hot isostatic press;TZM alloys in electronic and electrical industry using also more, Such as cathode for electron tube, grid, high-voltage rectifying original paper semiconductor film film integrated circuit;In addition, the TZM alloys on nuclear energy source device Also it is widely used, such as radiation shield, support frame, heat exchanger, rail bar.
WRe alloys, it is using tungsten as matrix, rhenium dissolves formation in tungsten, and there is body-centred cubic solution strengthening type W-Re to close Gold, there are a series of excellent performances such as:High-melting-point, high density, high rigidity, low thermal coefficient of expansion, good corrosion stability and anti- The excellent properties such as oxidation susceptibility, excellent electrical and thermal conductivity performance and ray absorption capacity.Turn into weaponry, Aero-Space, The critical material in the sophisticated technology field such as the national defense industry such as atomic energy field and microelectronics information, electrical engineering, machining, example Such as:In weapons field, available for ultrahigh speed kinetic energy penetrator;In nuclear fusion field, available in fusion reactor TOKAMAK device Facing plasma material.
TZM is effectively connected with WRe xenogenesis refractory alloy, is to expand refractory alloy in Aero-Space, nuclear energy, weaponry Deng the key applied in field.However, because the physics of both materials, chemical property difference are big (such as different melting points are big), make The connection obtained between the two is extremely difficult.At present mainly using melting welding, soldering, diffusion welding and partial transient liquid come real The connection of existing high temperature alloy.But there are many deficiencies in these methods:It is difficult to be made the joint of high bond strength;To metalwork surface Cleannes and equipment vacuum degree require it is very high;Temperature needed for diffusion welding and partial transient liquid is high, soaking time length, Connection between the two is caused to take, consume energy;Melting welding easily cracks;Although soldering connection temperature is relatively low, due to solder Fusing point is generally relatively low, therefore soldering is difficult to that the joint that can be used at high temperature is made.
Discharge plasma sintering (Spark Plasma Sintering, SPS) technology is to utilize flash DC current stream Joule heat is produced through powder or mould and a kind of new method of rapidly solidified shaping is carried out to powder.In recent years, this method starts It is used for welding field, same material (alloy and alloy, ceramics and ceramics), foreign material (alloy and ceramics) can be realized. Compared with traditional solid-state diffusion welding, the advantage of SPS solid-state diffusions welding is not only that the rate of heat addition is fast, energy consumption is low, particularly It is important that SPS introduces electric field on the basis of the temperature field needed for conventional solid Diffusion Welding and stress field.In electric field Under effect, electromigration effect can accelerate material to spread.Therefore, it is expected to using SPS technologies in lower temperature and reality in the short period Now to effective connection of TZM and WRe xenogenesis refractory alloys.On the other hand, after high temperature re-crystallization occurs for TZM alloys and WRe alloys Mechanical property can decline to a great extent.Addition low-melting-point metal or alloy can reduce welding temperature as intermediate layer, avoid TZM from closing Recrystallized in gold and WRe alloy welding processes.Vanadium, 1890 DEG C of fusing point, and molybdenum, tungsten belong to refractory metal system, and vanadium Complete solid solution can be formed with molybdenum, tungsten.Therefore, the intermediate layer welded using vanadium as TZM alloys and WRe alloy diffusion, It is expected to reduction welding temperature, avoiding mother metal that recrystallization occurs, (recrystallization temperature of TZM alloys and WRe alloys is respectively 1400 DEG C With 1750 DEG C), the seam organization of high quality is obtained, and then improve the mechanical property of welding point.
The content of the invention
For existing refractory alloy, especially TZM alloys and the weak point of WRe alloy interconnection techniques, mesh of the invention Be by SPS technologies be applied to refractory alloy solid-state diffusion connect, there is provided a kind of TZM and WRe xenogenesis refractory alloys it is fast Fast high-efficiency welding method, it is used as intermediate layer by adding vanadium paper tinsel, to reduce welding temperature, avoid mother metal from recrystallizing, and Complete solid solution is formed by atom counterdiffusion in weld seam, and then improves the mechanical property of welding point.
The present invention solves technical problem, adopts the following technical scheme that:
TZM of the present invention and WRe xenogenesis refractory alloys SPS diffusion welding methods, it is using vanadium paper tinsel as intermediate layer, leads to Cross SPS Technique on T ZM and carry out solid-state diffusion welding with WRe xenogenesis refractory alloy, so as to obtain TZM and WRe xenogenesis refractory alloys Connector.Specifically comprise the following steps:
Step 1,
TZM alloys and WRe alloys to be welded are taken, pre-grinding, polishing are carried out to the surface to be welded of TZM alloys and WRe alloys Be cleaned by ultrasonic and be dried in vacuo;
Step 2,
Acid is carried out to vanadium paper tinsel as intermediate layer in 100~300 μm, vanadium paper tinsel of the purity not less than 99% from thickness Wash, be cleaned by ultrasonic and dry;
Step 3,
Graphite jig is taken, the graphite jig includes seaming chuck, push-down head and graphite former;
The TZM alloys handled well, vanadium paper tinsel, WRe alloys are sequentially placed into graphite former from bottom to top, then use seaming chuck Compressed with push-down head, while vanadium paper tinsel is located at the middle position of graphite former height;
Step 4,
Graphite jig equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is not higher than 10Pa, DC pulse current is then passed to, welding is diffused to TZM and WRe xenogenesis refractory alloys, welding procedure is:
Axial compressive force is 20~60MPa,
Heating rate is 20~300 DEG C/min,
It is 1200~1400 DEG C to connect temperature,
Soaking time is 10~120min,
Rate of temperature fall is:It is 2~20 DEG C/min from the rate of temperature fall in the section that connection temperature is down to 1000 DEG C, from 1000 DEG C The rate of temperature fall for being down to 600 DEG C of section is 5~30 DEG C/min, and the furnace cooling of room temperature section is down to from 600 DEG C;
TZM and WRe xenogenesis refractory alloys connector are obtained after cooling.
Preferably, in step 1, by using #400, #800, #1000, #1500, #2000 abrasive paper for metallograph right respectively successively The surface to be welded of TZM alloys and WRe alloys carries out pre-grinding, then polishes and is cleaned by ultrasonic in alcohol, closes the TZM handled well Gold and the flatness of the surface to be welded of WRe alloys are not more than 0.1 μm no more than 0.1mm, roughness.
Preferably, in step 2, the pickling is that vanadium paper tinsel is soaked 5 minutes using the watery hydrochloric acid that volumetric concentration is 5%, institute Stating ultrasonic cleaning is carried out in alcohol.
Most preferably, welding condition described in step 4 is:
Axial compressive force is 40MPa,
Heating rate is 100 DEG C/min,
It is 1300 DEG C to connect temperature,
Soaking time is 30min,
Rate of temperature fall is:It is 10 DEG C/min from the 1300 DEG C of section for being down to 1000 DEG C rate of temperature fall, 600 is down to from 1000 DEG C DEG C section rate of temperature fall be 20 DEG C/min, be down to the furnace cooling of room temperature section from 600 DEG C.
It is above-mentioned most preferably welding condition be to be based on univariate Scientific experimental design, and many experiments grope and Obtain, on this condition, the combination property of product is optimal.
Compared with prior art, beneficial effects of the present invention are embodied in:
1st, the present invention can realize rapidly and efficiently being connected for TZM and WRe xenogenesis refractory alloys using SPS technologies, and traditional Joining Technology is compared, and this method connection temperature is low, soaking time is short, energy consumption is low, requires low to equipment vacuum degree;Vanadium paper tinsel is added to make For intermediate layer, while atoms permeating is promoted by electromigration effect, on the premise of strength of parent is not reduced, realize TZM With the efficient connection of WRe xenogenesis refractory alloys.
2nd, while can ensureing that mother metal does not recrystallize by the welding method of the present invention, intensity height, forming are obtained TZM and WRe xenogenesis refractory alloy weldments, joint room temperature shear strength is up to 234MPa.
3rd, present invention optimizes TZM and the SPS diffusion technology for welding of WRe xenogenesis refractory alloys, when axial compressive force, heating speed Rate, connection temperature, soaking time and rate of temperature fall be respectively preferably 40MPa, 100 DEG C/min, 1300 DEG C, 30min, rate of temperature fall For 10-20 DEG C/min, (1300 DEG C of section rate of temperature fall for being down to 1000 DEG C are 10 DEG C/min, 1000 DEG C of sections for being down to 600 DEG C Rate of temperature fall is 20 DEG C/min) when, the advantage of the welding procedure can be more given full play to, is ensureing there be the same of sufficiently thick diffusion layer The crystal grain that Shi Youxiao suppresses in mother metal recrystallization process is grown up.
Embodiment
By embodiment, the invention will be further described as follows, but embodiments of the present invention are not limited only to this.
Discharge plasma sintering stove used in following embodiments is the LABOX- of Japanese Sinter Land inc companies production 350 discharge plasma sintering systems, its current type are DC pulse current, pulse train 40:7;Graphite jig used Internal diameter is Φ 11mm.
TZM alloys used, WRe alloys in following embodiments, both at forging state:The composition of TZM alloys be 0.4~ 0.6wt.% Ti, 0.07~0.12wt.% Zr and 0.01~0.04wt.% C, remaining is Mo (disregarding impurity content); The composition of WRe alloys is 24~26wt.% Re, and remaining is W (disregarding impurity content).
Embodiment 1
The SPS Diffusion Weldings of TZM and WRe the xenogenesis refractory alloy of the present embodiment are carried out as follows:
Step 1,
The surface to be welded of TZM and WRe alloys is entered using #400, #800, #1000, #1500, #2000 abrasive paper for metallograph successively Row pre-grinding, then polish and be cleaned by ultrasonic in alcohol;Flatness and the roughness difference of TZM alloy surfaces to be welded after processing For 0.07mm and 0.06 μm, the flatness and roughness of the WRe alloy surfaces to be welded after processing are respectively 0.09mm and 0.06 μm.
Step 2,
Vanadium paper tinsel is placed in the watery hydrochloric acid that volumetric concentration is 5% and soaks 5min, is then cleaned by ultrasonic in alcohol, finally dries It is dry standby.
Step 3,
The TZM alloys handled well, vanadium paper tinsel, WRe alloys are sequentially placed into graphite former from top to bottom, then with upper and lower Pressure head compresses, while vanadium paper tinsel is located at the middle position of former height.
Step 4,
Graphite jig equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is less than 10Pa, DC pulse current is then passed to, welding is diffused to TZM and WRe xenogenesis refractory alloys, welding procedure is:
Axial compressive force is 40MPa,
Heating rate is 100 DEG C/min,
It is 1300 DEG C to connect temperature,
Soaking time is 30min,
Rate of temperature fall is:The rate of temperature fall in the section for being down to 1000 DEG C from 1300 DEG C is 10 DEG C/min, is down to from 1000 DEG C The rate of temperature fall in 600 DEG C of section is 20 DEG C/min, and the furnace cooling of room temperature section is down to from 600 DEG C;
TZM and WRe xenogenesis refractory alloys connector are obtained after cooling.After tested, the room temperature shear strength of joint For 234MPa.
Embodiment 2
The SPS Diffusion Weldings of TZM and WRe the xenogenesis refractory alloy of the present embodiment are carried out as follows:
Step 1,
To the surface to be welded of TZM and WRe xenogenesis refractory alloys successively using #400, #800, #1000, #1500, #2000 gold Phase sand paper carries out pre-grinding, then polishes and is cleaned by ultrasonic in alcohol;The flatness of TZM alloy surfaces to be welded after processing and thick Rugosity is respectively 0.05mm and 0.08 μm, and the flatness and roughness of the WRe alloy surfaces to be welded after processing are respectively 0.08mm With 0.04 μm.
Step 2,
Vanadium paper tinsel is placed in the watery hydrochloric acid that volumetric concentration is 5% and soaks 5min, is then cleaned by ultrasonic in alcohol, finally dries It is dry standby.
Step 3,
The TZM alloys handled well, vanadium paper tinsel, WRe alloys are sequentially placed into graphite former from top to bottom, then with upper and lower Pressure head compresses, while vanadium paper tinsel is located at the middle position of former height.
Step 4,
Graphite jig equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is less than 10Pa, DC pulse current is then passed to, welding is diffused to TZM and WRe xenogenesis refractory alloys, welding procedure is:
Axial compressive force is 40MPa,
Heating rate is 100 DEG C/min,
It is 1200 DEG C to connect temperature,
Soaking time is 30min,
Rate of temperature fall is:The rate of temperature fall in the section for being down to 1000 DEG C from 1200 is 10 DEG C/min, and 600 DEG C are down to from 1000 The rate of temperature fall in section be 20 DEG C/min, be down to the furnace cooling of room temperature section from 600 DEG C;
TZM and WRe xenogenesis refractory alloys connector are obtained after cooling.After tested, the room temperature shear strength of joint For 180MPa.
Embodiment 3
The SPS Diffusion Weldings of TZM and WRe the xenogenesis refractory alloy of the present embodiment are carried out as follows:
Step 1,
#400, #800, #1000, #1500, #2000 metallographic sand are used successively to the surface to be welded of TZM alloys and WRe alloys Paper carries out pre-grinding, then polishes and is cleaned by ultrasonic in alcohol;The flatness and roughness of molybdenum alloy surface to be welded after processing Respectively 0.06mm and 0.08 μm, the flatness and roughness of the tungsten alloy surface to be welded after processing are respectively 0.09mm and 0.06 μm。
Step 2,
Vanadium paper tinsel is placed in the watery hydrochloric acid that volumetric concentration is 5% and soaks 5min, is then cleaned by ultrasonic in alcohol, finally dries It is dry standby.
Step 3,
The TZM alloys handled well, vanadium paper tinsel, WRe alloys are sequentially placed into graphite former from top to bottom, then with upper and lower Pressure head compresses, while vanadium paper tinsel is located at the middle position of former height.
Step 4,
Graphite jig equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is less than 10Pa, DC pulse current is then passed to, welding is diffused to TZM and WRe xenogenesis refractory alloys, welding procedure is:
Axial compressive force is 40MPa,
Heating rate is 100 DEG C/min,
It is 1400 DEG C to connect temperature,
Soaking time is 30min,
Rate of temperature fall is:The rate of temperature fall in the section for being down to 1000 DEG C from 1400 is 10 DEG C/min, and 600 DEG C are down to from 1000 The rate of temperature fall in section be 20 DEG C/min, be down to the furnace cooling of room temperature section from 600 DEG C;
TZM and WRe xenogenesis refractory alloys connector are obtained after cooling.After tested, the room temperature shear strength of joint For 151MPa.
Embodiment 4
The SPS Diffusion Weldings of TZM and WRe the xenogenesis refractory alloy of the present embodiment are carried out as follows:
Step 1,
#400, #800, #1000, #1500, #2000 metallographic sand are used successively to the surface to be welded of TZM alloys and WRe alloys Paper carries out pre-grinding, then polishes and is cleaned by ultrasonic in alcohol;The flatness and roughness of molybdenum alloy surface to be welded after processing Respectively 0.05mm and 0.08 μm, the flatness and roughness of the tungsten alloy surface to be welded after processing are respectively 0.07mm and 0.07 μm。
Step 2,
Vanadium paper tinsel is placed in the watery hydrochloric acid that volumetric concentration is 5% and soaks 5min, is then cleaned by ultrasonic in alcohol, finally dries It is dry standby.
Step 3,
The TZM alloys handled well, vanadium paper tinsel, WRe alloys are sequentially placed into graphite former from top to bottom, then with upper and lower Pressure head compresses, while vanadium paper tinsel is located at the middle position of former height.
Step 4,
Graphite jig equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is less than 10Pa, DC pulse current is then passed to, welding is diffused to TZM and WRe xenogenesis refractory alloys, welding procedure is:
Axial compressive force is 20MPa,
Heating rate is 100 DEG C/min,
It is 1300 DEG C to connect temperature,
Soaking time is 30min,
Rate of temperature fall is:The rate of temperature fall in the section for being down to 600 DEG C from 1300 is 10 DEG C/min, and 600 DEG C are down to from 1000 The rate of temperature fall in section be 20 DEG C/min, be down to the furnace cooling of room temperature section from 600 DEG C;
TZM and WRe xenogenesis refractory alloys connector are obtained after cooling.After tested, the room temperature shear strength of joint For 182MPa.
Embodiment 5
The SPS Diffusion Weldings of TZM and WRe the xenogenesis refractory alloy of the present embodiment are carried out as follows:
Step 1,
#400, #800, #1000, #1200, #1500, #2000 are used successively to the surface to be welded of TZM alloys and WRe alloys Abrasive paper for metallograph carries out pre-grinding, then polishes and is cleaned by ultrasonic in alcohol;The flatness of molybdenum alloy surface to be welded after processing and Roughness is respectively 0.06mm and 0.07 μm, and the flatness and roughness of the tungsten alloy surface to be welded after processing are respectively 0.08mm With 0.05 μm.
Step 2,
Vanadium paper tinsel is placed in the watery hydrochloric acid that volumetric concentration is 5% and soaks 5min, is then cleaned by ultrasonic in alcohol, finally dries It is dry standby.
Step 3,
The molybdenum alloy handled well, vanadium paper tinsel, tungsten alloy are sequentially placed into graphite former from top to bottom, then uses, push Head compresses, while vanadium paper tinsel is located at the middle position of former height.
Step 4,
Graphite jig equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is less than 10Pa, DC pulse current is then passed to, welding is diffused to TZM and WRe xenogenesis refractory alloys, welding procedure is:
Axial compressive force is 40MPa,
Heating rate is 100 DEG C/min,
It is 1300 DEG C to connect temperature,
Soaking time is 10min,
Rate of temperature fall is:The rate of temperature fall in the section for being down to 600 DEG C from 1300 is 10 DEG C/min, and 600 DEG C are down to from 1000 The rate of temperature fall in section be 20 DEG C/min, be down to the furnace cooling of room temperature section from 600 DEG C;
TZM and WRe xenogenesis refractory alloys connector are obtained after cooling.After tested, the room temperature shear strength of joint For 205MPa.
Embodiment 6
The SPS Diffusion Weldings of TZM and WRe the xenogenesis refractory alloy of the present embodiment are carried out as follows:
Step 1,
#400, #800, #1000, #1500, #2000 metallographic sand are used successively to the surface to be welded of TZM alloys and WRe alloys Paper carries out pre-grinding, then polishes and is cleaned by ultrasonic in alcohol;The flatness and roughness of molybdenum alloy surface to be welded after processing Respectively 0.09mm and 0.07 μm, the flatness and roughness of the tungsten alloy surface to be welded after processing are respectively 0.08mm and 0.05 μm。
Step 2,
Vanadium paper tinsel is placed in the watery hydrochloric acid that volumetric concentration is 5% and soaks 5min, is then cleaned by ultrasonic in alcohol, finally dries It is dry standby.
Step 3,
The TZM alloys handled well, vanadium paper tinsel, WRe alloys are sequentially placed into graphite former from top to bottom, then with upper and lower Pressure head compresses, while vanadium paper tinsel is located at the middle position of former height.
Step 4,
Graphite jig equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is less than 10Pa, DC pulse current is then passed to, welding is diffused to TZM and WRe xenogenesis refractory alloys, welding procedure is:
Axial compressive force is 40MPa,
Heating rate is 100 DEG C/min,
It is 1300 DEG C to connect temperature,
Soaking time is 60min,
Rate of temperature fall is:The rate of temperature fall in the section for being down to 600 DEG C from 1300 DEG C is 10 DEG C/min, is down to from 1000 DEG C The rate of temperature fall in 600 DEG C of section is 20 DEG C/min, and the furnace cooling of room temperature section is down to from 600 DEG C;
TZM and WRe xenogenesis refractory alloys connector are obtained after cooling.After tested, the room temperature shear strength of joint For 220MPa.
Embodiment 7
The SPS Diffusion Weldings of TZM and WRe the xenogenesis refractory alloy of the present embodiment are carried out as follows:
Step 1,
#400, #800, #1000, #1500, #2000 metallographic sand are used successively to the surface to be welded of TZM alloys and WRe alloys Paper carries out pre-grinding, then polishes and is cleaned by ultrasonic in alcohol;The flatness and roughness of molybdenum alloy surface to be welded after processing Respectively 0.08mm and 0.06 μm, the flatness and roughness of the tungsten alloy surface to be welded after processing are respectively 0.09mm and 0.07 μm。
Step 2,
Vanadium paper tinsel is placed in the watery hydrochloric acid that volumetric concentration is 5% and soaks 5min, is then cleaned by ultrasonic in alcohol, finally dries It is dry standby.
Step 3,
The TZM alloys handled well, vanadium paper tinsel, WRe alloys are sequentially placed into graphite former from top to bottom, then with upper and lower Pressure head compresses, while vanadium paper tinsel is located at the middle position of former height.
Step 4,
Graphite jig equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is less than 10Pa, DC pulse current is then passed to, welding is diffused to TZM and WRe xenogenesis refractory alloys, welding procedure is:
Axial compressive force is 60MPa,
Heating rate is 20 DEG C/min,
It is 1200 DEG C to connect temperature,
Soaking time is 120min,
Rate of temperature fall is:The rate of temperature fall in the section for being down to 1000 DEG C from 1200 DEG C is 2 DEG C/min, is down to from 1000 DEG C The rate of temperature fall in 600 DEG C of section is that 30 DEG C/min is down to the furnace cooling of room temperature section from 600 DEG C;
TZM and WRe xenogenesis refractory alloys connector are obtained after cooling.After tested, the room temperature shear strength of joint For 185MPa.
Embodiment 8
The SPS Diffusion Weldings of TZM and WRe the xenogenesis refractory alloy of the present embodiment are carried out as follows:
Step 1,
#400, #800, #1000, #1500, #2000 metallographic sand are used successively to the surface to be welded of TZM alloys and WRe alloys Paper carries out pre-grinding, then polishes and is cleaned by ultrasonic in alcohol;The flatness and roughness of TZM alloy surfaces to be welded after processing Respectively 0.07mm and 0.06 μm, the flatness and roughness of the WRe alloy surfaces to be welded after processing be respectively 0.05mm and 0.08μm。
Step 2,
Vanadium paper tinsel is placed in the watery hydrochloric acid that volumetric concentration is 5% and soaks 5min, is then cleaned by ultrasonic in alcohol, finally dries It is dry standby.
Step 3,
The TZM alloys handled well, vanadium paper tinsel, WRe alloys are sequentially placed into graphite former from top to bottom, then with upper and lower Pressure head compresses, while vanadium paper tinsel is located at the middle position of former height.
Step 4,
Graphite jig equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is less than 10Pa, DC pulse current is then passed to, welding is diffused to TZM and WRe xenogenesis refractory alloys, welding procedure is:
Axial compressive force is 50MPa,
Heating rate is 80 DEG C/min,
It is 1400 DEG C to connect temperature,
Soaking time is 60min,
Rate of temperature fall is:The rate of temperature fall in the section for being down to 1000 DEG C from 1300 DEG C is 5 DEG C/min, is down to from 1000 DEG C The rate of temperature fall in 600 DEG C of section is 20 DEG C/min, and the furnace cooling of room temperature section is down to from 600 DEG C;
TZM and WRe xenogenesis refractory alloys connector are obtained after cooling.After tested, the room temperature shear strength of joint For 143MPa.
Embodiment 9
The SPS Diffusion Weldings of TZM and WRe the xenogenesis refractory alloy of the present embodiment are carried out as follows:
Step 1,
#400, #800, #1000, #1500, #2000 metallographic sand are used successively to the surface to be welded of TZM alloys and WRe alloys Paper carries out pre-grinding, then polishes and is cleaned by ultrasonic in alcohol;The flatness and roughness of molybdenum alloy surface to be welded after processing Respectively 0.07mm and 0.07 μm, the flatness and roughness of the tungsten alloy surface to be welded after processing are respectively 0.06mm and 0.1 μ m。
Step 2,
Vanadium paper tinsel is placed in the watery hydrochloric acid that volumetric concentration is 5% and soaks 5min, is then cleaned by ultrasonic in alcohol, finally dries It is dry standby.
Step 3,
The TZM alloys handled well, vanadium paper tinsel, WRe alloys are sequentially placed into graphite former from top to bottom, then with upper and lower Pressure head compresses, while vanadium paper tinsel is located at the middle position of former height.
Step 4,
Graphite jig equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is less than 10Pa, DC pulse current is then passed to, welding is diffused to TZM and WRe xenogenesis refractory alloys, welding procedure is:
Axial compressive force is 30MPa,
Heating rate is 300 DEG C/min,
It is 1300 DEG C to connect temperature,
Soaking time is 60min,
Rate of temperature fall is:The rate of temperature fall in the section for being down to 1000 DEG C from 1400 DEG C is 10 DEG C/min, is down to from 1000 DEG C The rate of temperature fall in 600 DEG C of section is 15 DEG C/min, and the furnace cooling of room temperature section is down to from 600 DEG C;
TZM and WRe xenogenesis refractory alloys connector are obtained after cooling.After tested, the room temperature shear strength of joint For 200MPa.
Embodiment 10
The SPS Diffusion Weldings of TZM and WRe the xenogenesis refractory alloy of the present embodiment are carried out as follows:
Step 1,
#400, #800, #1000, #1500, #2000 metallographic sand are used successively to the surface to be welded of TZM alloys and WRe alloys Paper carries out pre-grinding, then polishes and is cleaned by ultrasonic in alcohol;The flatness and roughness of molybdenum alloy surface to be welded after processing Respectively 0.09mm and 0.08 μm, the flatness and roughness of the tungsten alloy surface to be welded after processing are respectively 0.05mm and 0.07 μm。
Step 2,
Vanadium paper tinsel is placed in the watery hydrochloric acid that volumetric concentration is 5% and soaks 5min, is then cleaned by ultrasonic in alcohol, finally dries It is dry standby.
Step 3,
The TZM alloys handled well, vanadium paper tinsel, WRe alloys are sequentially placed into graphite former from top to bottom, then with upper and lower Pressure head compresses, while vanadium paper tinsel is located at the middle position of former height.
Step 4,
Graphite jig equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is less than 10Pa, DC pulse current is then passed to, welding is diffused to TZM and WRe xenogenesis refractory alloys, welding procedure is:
Axial compressive force is 20MPa,
Heating rate is 200 DEG C/min,
It is 1400 DEG C to connect temperature,
Soaking time is 30min,
Rate of temperature fall is:The rate of temperature fall in the section for being down to 1000 DEG C from 1400 DEG C is 15 DEG C/min, is down to from 1000 DEG C The rate of temperature fall in 600 DEG C of section is 10 DEG C/min, and the furnace cooling of room temperature section is down to from 600 DEG C;
TZM and WRe xenogenesis refractory alloys connector are obtained after cooling.After tested, the room temperature shear strength of joint For 138MPa.
Embodiment 11
The SPS Diffusion Weldings of TZM and WRe the xenogenesis refractory alloy of the present embodiment are carried out as follows:
Step 1,
#400, #800, #1000, #1500, #2000 metallographic sand are used successively to the surface to be welded of TZM alloys and WRe alloys Paper carries out pre-grinding, then polishes and is cleaned by ultrasonic in alcohol;The flatness and roughness of TZM alloy surfaces to be welded after processing Respectively 0.08mm and 0.08 μm, the flatness and roughness of the WRe alloy surfaces to be welded after processing be respectively 0.06mm and 0.07μm。
Step 2,
Vanadium paper tinsel is placed in the watery hydrochloric acid that volumetric concentration is 5% and soaks 5min, is then cleaned by ultrasonic in alcohol, finally dries It is dry standby.
Step 3,
The TZM alloys handled well, vanadium paper tinsel, WRe alloys are sequentially placed into graphite former from top to bottom, then with upper and lower Pressure head compresses, while vanadium paper tinsel is located at the middle position of former height.
Step 4,
Graphite jig equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is less than 10Pa, DC pulse current is then passed to, welding is diffused to TZM and WRe xenogenesis refractory alloys, welding procedure is:
Axial compressive force is 20MPa,
Heating rate is 200 DEG C/min,
It is 1300 DEG C to connect temperature,
Soaking time is 10min,
Rate of temperature fall is:The rate of temperature fall in the section for being down to 1000 DEG C from 1300 DEG C is 20 DEG C/min, is down to from 1000 DEG C The rate of temperature fall in 600 DEG C of section is 5 DEG C/min, and the furnace cooling of room temperature section is down to from 600 DEG C;
TZM and WRe xenogenesis refractory alloys connector are obtained after cooling.After tested, the room temperature shear strength of joint For 179MPa.
The exemplary embodiment of the present invention is these are only, is not intended to limit the invention, all spirit in the present invention With all any modification, equivalent and improvement made within principle etc., it should be included in the scope of the protection.

Claims (5)

1. a kind of TZM and WRe xenogenesis refractory alloys SPS diffusion welding methods, it is characterised in that:It is that middle mistake is used as using vanadium paper tinsel Layer is crossed, solid-state diffusion welding is carried out by SPS Technique on T ZM and WRe xenogenesis refractory alloy, it is difficult with WRe xenogenesis so as to obtain TZM Fuse the connector of gold.
2. TZM according to claim 1 and WRe xenogenesis refractory alloys SPS diffusion welding methods, it is characterised in that:
Step 1,
TZM alloys and WRe alloys to be welded are taken, pre-grinding, polishing are carried out to the surface to be welded of TZM alloys and WRe alloys and is surpassed Sound is cleaned and is dried in vacuo;
Step 2,
Pickling is carried out to vanadium paper tinsel, is surpassed as intermediate layer in 100~300 μm, vanadium paper tinsel of the purity not less than 99% from thickness Sound is cleaned and dried;
Step 3,
Graphite jig is taken, the graphite jig includes seaming chuck, push-down head and graphite former;
The TZM alloys handled well, vanadium paper tinsel, WRe alloys are sequentially placed into graphite former from bottom to top, then with seaming chuck with Pressure head compresses, while vanadium paper tinsel is located at the middle position of graphite former height;
Step 4,
Graphite jig equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is not higher than 10Pa, DC pulse current is then passed to, welding is diffused to TZM and WRe xenogenesis refractory alloys, welding procedure is:
Axial compressive force is 20~60MPa,
Heating rate is 20~300 DEG C/min,
It is 1200~1400 DEG C to connect temperature,
Soaking time is 10~120min,
Rate of temperature fall is:It is 2~20 DEG C/min from the rate of temperature fall in the section that connection temperature is down to 1000 DEG C, is down to from 1000 DEG C The rate of temperature fall in 600 DEG C of section is 5~30 DEG C/min, and the furnace cooling of room temperature section is down to from 600 DEG C;
TZM and WRe xenogenesis refractory alloys connector are obtained after cooling.
3. TZM according to claim 2 and WRe xenogenesis refractory alloys SPS diffusion welding methods, it is characterised in that:Step In rapid 1, by using #400, #800, #1000, #1500, #2000 abrasive paper for metallograph respectively to TZM alloys and WRe alloys successively Surface to be welded carries out pre-grinding, then polishes and is simultaneously cleaned by ultrasonic in alcohol, makes the to be welded of the TZM alloys handled well and WRe alloys The flatness of junction is not more than 0.1 μm no more than 0.1mm, roughness.
4. TZM according to claim 2 and WRe xenogenesis refractory alloys SPS diffusion welding methods, it is characterised in that:Step In rapid 2, the pickling is that vanadium paper tinsel is soaked 5 minutes using the watery hydrochloric acid that volumetric concentration is 5%, and the ultrasonic cleaning is in alcohol Middle progress.
5. TZM according to claim 2 and WRe xenogenesis refractory alloys SPS diffusion welding methods, it is characterised in that:Step Rapid 4 welding condition is:
Axial compressive force is 40MPa,
Heating rate is 100 DEG C/min,
It is 1300 DEG C to connect temperature,
Soaking time is 30min,
Rate of temperature fall is:It is 10 DEG C/min from the 1300 DEG C of section for being down to 1000 DEG C rate of temperature fall, 600 DEG C is down to from 1000 DEG C Section rate of temperature fall is 20 DEG C/min, and the furnace cooling of room temperature section is down to from 600 DEG C.
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