CN107081517A - A kind of law temperature joining method of TZM and WRe different alloys - Google Patents
A kind of law temperature joining method of TZM and WRe different alloys Download PDFInfo
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- CN107081517A CN107081517A CN201710505127.2A CN201710505127A CN107081517A CN 107081517 A CN107081517 A CN 107081517A CN 201710505127 A CN201710505127 A CN 201710505127A CN 107081517 A CN107081517 A CN 107081517A
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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
- B23K20/02—Non-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
- B23K20/023—Thermo-compression bonding
- B23K20/026—Thermo-compression bonding with diffusion of soldering material
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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
- B23K20/24—Preliminary treatment
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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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/18—Dissimilar materials
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Abstract
The invention provides a kind of law temperature joining method of TZM and WRe different alloys, it is that active intermediate is used as using Ti powder, welding is diffused to TZM alloys and WRe alloys under the recrystallization temperature less than mother metal by discharge plasma sintering technique, the connector of TZM alloys and WRe alloys is obtained.While can ensureing that mother metal is not recrystallized by the welding method of the present invention, intensity height, the TZM/WRe different alloys connectors of forming are obtained, joint room temperature shear strength is up to 263MPa.
Description
Technical field
The present invention relates to a kind of law temperature joining method of xenogenesis refractory alloy, more particularly to a kind of TZM/WRe different alloys
Connection method.
Background technology
TZM alloys are that a kind of high temperature alloy formed by Ti and Zr of the total amount no more than 1% is added in Mo matrixes.With it is pure
Molybdenum is compared, and TZM alloys have higher recrystallization temperature and elevated temperature strength.TZM Alloyapplications are extensive, such as：Good using it
Corrosion stability, glass-melting furnace and the main shaft with platinum rhodium cladding agitator on color picture tube glass bulb production line；Utilize its Gao Rong
The characteristic of point, the die casting for manufacturing non-ferrous metal；Using mechanical property good under its HTHP, for torpedo hair
The military affairs component such as distribution valve body, rocket nozzle in motivation.
The alloy that WRe alloys are made up of W and Re.Re recrystallization temperature is higher than W 500 DEG C, and Re is not present and moulds crisp
Transition temperature.Therefore, Re addition can significantly improve W brittleness at room temperature, and crisp transition temperature is moulded in reduction, and can be in certain high temperature
Region strengthens W mechanical property.With developing rapidly for national defense industry and national economy, WRe alloyed components are in each field
Using increasingly extensive, such as solid rocket motor nozzle, nuclear fuel storage and control device, extreme environment thermocouple and aviation
Electromagnetic motor electric contact material etc..
The composite construction that TZM alloys and WRe alloys are joined together to form, for expanding TZM alloys in hot environment
Using having very important significance.However, physics, big (such as fusing point of chemical property difference due to TZM alloys and WRe alloys
Difference is big) so that connection between the two is extremely difficult.It is main using melting welding, soldering, diffusion welding and moment liquid at present
It is connected to realize the connection of refractory alloy.But there are many deficiencies in these methods：Melting welding is easily cracked, and in molten bath
The new alloy of formation, often with stronger fragility, causes weld seam tensile strength not high, it is difficult to the joint of high intensity is made；Gu
Temperature needed for phase diffusion connection and partial transient liquid is high, soaking time is long, causes connection between the two to take, consume energy, and hold
Easily there is serious recrystallization problem, cause material mechanical performance to decline to a great extent, workpiece is deformed；Although soldering connect temperature compared with
It is low, but because the fusing point of solder is generally relatively low, thus soldering be not only difficult to give full play of refractory metal mechanical behavior under high temperature it is excellent
Different strong point, and weld seam easily ftractures in high/low temperature cyclic process, causes air-tightness can not meet application request, sternly
Its application is limited again.
Discharge plasma sintering technique (Spark Plasma Sintering, SPS), is nearly one kind grown up for 20 years
New powder Fast Sintering technology, the field of powder metallurgy for being applied to refractory metal more.With the gradually development of SPS technologies,
It is found that it not only has the advantages that conventional method can not go beyond in field of powder metallurgy, and it also has solely in welding field
Special advantage, can realize of the same race, being directly connected between dissimilar metal, or even metal and ceramics.Therefore, touched by experiment
Rope, is expected to realize to being reliably tightly connected between TZM alloys and WRe alloys using SPS technologies.
The content of the invention
For existing refractory metal, especially TZM alloys and the weak point of WRe alloy interconnection techniques, mesh of the invention
Be using discharge plasma sintering technique be used for refractory alloy diffusion welding there is provided one kind addition Ti powder be used as activity
The connection method of the TZM and WRe different alloys in intermediate layer, reduces welding temperature, to avoid foundry alloy from promoting while recrystallization
Atoms permeating, and then improve the mechanical property of welding point.
The present invention solves technical problem, adopts the following technical scheme that：
The law temperature joining method of TZM and WRe different alloys of the present invention, is, using Ti powder as active intermediate, to pass through electric discharge
Plasma sintering technique is diffused welding to TZM alloys and WRe alloys under the recrystallization temperature less than mother metal, so as to obtain
The connector of TZM alloys and WRe alloys.Specifically include following steps：
Step 1,
TZM alloys and WRe alloys to be connected is taken, pre-grinding, throwing are carried out to the surface to be connected of TZM alloys and WRe alloys
Light and ultrasonic cleaning are simultaneously dried in vacuo；
Step 2,
Weigh Ti powder of the particle diameter at 30~60 μm；
Step 3,
Graphite jig is taken, the graphite jig includes seaming chuck, push-down head and graphite former；
The TZM alloys handled well, Ti powder and the WRe alloys handled well are sequentially placed into graphite former from bottom to top, so
Compressed afterwards with seaming chuck and push-down head, while making Ti powder active intermediate positioned at the middle position of graphite former height；
Step 4,
The graphite jig that will be equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is less than
8Pa, then passes to DC pulse current, is diffused welding to TZM alloys and WRe alloys, welding condition is：
Axial compressive force is 20~60MPa,
Heating rate is 20~300 DEG C/min,
It is 800~1100 DEG C to connect temperature,
Soaking time is 10~120min,
Rate of temperature fall is：The interval rate of temperature fall for being down to 600 DEG C from connection temperature is 2~40 DEG C/min, from 600 DEG C of drops
To the interval furnace cooling of room temperature；
The connector of TZM alloys and WRe alloys, the thickness of the Ti active intermediates of the connector are obtained after cooling
At 40~120 μm.
In specific implementation, when the connection temperature is 800~1100 DEG C, the pulse direct current current density that correspondence applies is
400~600A/cm2。
Most preferably, welding condition described in step 4 is：
Axial compressive force is 50MPa,
Heating rate is 100 DEG C/min,
It is 900 DEG C to connect temperature,
Soaking time is 30min,
Rate of temperature fall is：The interval rate of temperature fall that 600 DEG C are down to from 900 DEG C is 20 DEG C/min, and room-temperature zone is down to from 600 DEG C
Between furnace cooling.
Above-mentioned optimal conditions is to be based on univariate Scientific experimental design, and many experiments are groped and obtained, herein
Under the conditions of, the combination property of product is optimal.
It is preferred that, the Ti active intermediates thickness of the connector is at 60~80 μm.The thickness in intermediate layer is excessively thin, can influence
Smooth welded seam degree, is limited the connection of TZM and WRe alloys, mechanical property that is blocked up and can reducing connector.
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 alloys and WRe alloys using discharge plasma sintering technique, with
Traditional Joining Technology is compared, and this method connection temperature is low, soaking time is short, energy consumption is low, require low to equipment vacuum degree；Pass through
Ti powder is added as activation intermediate layer, the connection temperature of TZM/WRe different alloys is reduced, it is to avoid foundry alloy is recrystallized,
Significantly improve the high-temperature behavior and service life of welding point.
2nd, while can ensureing that mother metal is not recrystallized by the welding method of the present invention, intensity height, forming are obtained
TZM/WRe different alloys connectors, joint room temperature shear strength is up to 263MPa.
3rd, present invention optimizes TZM alloys and the SPS Joining Technologies of WRe alloys, when axial compressive force, the rate of heat addition, connection
Temperature, soaking time and rate of temperature fall are respectively preferably 50MPa, 100 DEG C/min, 900 DEG C, 30min and 20 DEG C/min (cooling speed
Rate is 20 DEG C/min in 600~900 DEG C of intervals) when, the advantage of the Joining Technology can be more given full play to, is ensureing there is sufficiently thick
The crystal grain for effectively suppressing foundry alloy recrystallization process while diffusion layer is grown up.
Embodiment
Following by embodiment, the invention will be further described, but embodiments of the present invention are not limited only to this.
TZM alloys and WRe alloys used are forging state in following embodiments：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),
Average grain size is 100 μm；The composition of WRe alloys is 24~26wt.% Re, and remaining is W (disregarding impurity content), average
Crystallite dimension is 10 μm.
Discharge plasma sintering stove used in following embodiments is the LABOX- that Sinter Land inc companies of Japan produce
350 discharge plasma sintering systems, its current type is DC pulse current, and pulse train is 40:7；Graphite jig used
Internal diameter is Φ 8mm.
Embodiment 1
The low temperature diffusion welding of the TZM/WRe different alloys of the present embodiment is carried out as follows：
Step 1,
Surface to be welded to TZM alloys and WRe alloys uses #400, #800, #1000, #1500, #2000 metallographic sand successively
Paper carries out pre-grinding, and then polishing is simultaneously cleaned by ultrasonic in alcohol.
Step 2,
The Ti powder of 46 μm of 0.0158g particle diameters is weighed with electronic balance (precision is 0.1mg), to ensure titanium in later stage connector
Active intermediate thickness is at 60~80 μm.
Step 3,
The TZM alloys handled well, Ti powder and WRe alloys are sequentially placed into graphite former from top to bottom, then with upper and lower
Pressure head is compressed, while making Ti powder active intermediate positioned at the middle position of graphite former height.
Step 4,
The graphite jig that will be equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is less than
8Pa, then passes to DC pulse current, is diffused welding to TZM alloys and WRe alloys, welding condition is：
Axial compressive force is 50MPa,
Heating rate is 100 DEG C/min,
It is 900 DEG C to connect temperature,
Soaking time is 30min,
Rate of temperature fall is：The interval rate of temperature fall that 600 DEG C are down to from connection temperature is 20 DEG C/min, is down to from 600 DEG C
Room temperature interval furnace cooling；
The connector of TZM alloys and WRe alloys is obtained after cooling.After measured, the room temperature shear strength of joint is
263MPa。
Embodiment 2
The low temperature diffusion welding of the TZM/WRe different alloys of the present embodiment is carried out as follows：
Step 1,
Surface to be welded to TZM alloys and WRe alloys uses #400, #800, #1000, #1500, #2000 metallographic sand successively
Paper carries out pre-grinding, and then polishing is simultaneously cleaned by ultrasonic in alcohol.
Step 2,
The Ti powder of 46 μm of 0.0158g particle diameters is weighed with electronic balance (precision is 0.1mg), to ensure Ti in later stage connector
Active intermediate thickness is at 60~80 μm.
Step 3,
The TZM alloys handled well, Ti powder and WRe alloys are sequentially placed into graphite former from top to bottom, then with upper and lower
Pressure head is compressed, while making Ti powder active intermediate positioned at the middle position of graphite former height.
Step 4,
The graphite jig that will be equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is less than
8Pa, then passes to DC pulse current, is diffused welding to TZM alloys and WRe alloys, welding condition is：
Axial compressive force is 50MPa,
Heating rate is 100 DEG C/min,
It is 800 DEG C to connect temperature,
Soaking time is 30min,
Rate of temperature fall is：The interval rate of temperature fall that 600 DEG C are down to from connection temperature is 20 DEG C/min, is down to from 600 DEG C
Room temperature interval furnace cooling；
The connector of TZM alloys and WRe alloys is obtained after cooling.After measured, the room temperature shear strength of joint is
142MPa。
Embodiment 3
The low temperature diffusion welding of the TZM/WRe different alloys of the present embodiment is carried out as follows：
Step 1,
Surface to be welded to TZM alloys and WRe alloys uses #400, #800, #1000, #1500, #2000 metallographic sand successively
Paper carries out pre-grinding, and then polishing is simultaneously cleaned by ultrasonic in alcohol.
Step 2,
The Ti powder of 46 μm of 0.0158g particle diameters is weighed with electronic balance (precision is 0.1mg), to ensure Ti in later stage connector
Active intermediate thickness is at 60~80 μm.
Step 3,
The TZM alloys handled well, Ti powder and WRe alloys are sequentially placed into graphite former from top to bottom, then with upper and lower
Pressure head is compressed, while making Ti powder active intermediate positioned at the middle position of graphite former height.
Step 4,
The graphite jig that will be equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is less than
8Pa, then passes to DC pulse current, is diffused welding to TZM alloys and WRe alloys, welding condition is：
Axial compressive force is 50MPa,
Heating rate is 100 DEG C/min,
It is 1000 DEG C to connect temperature,
Soaking time is 30min,
Rate of temperature fall is：The interval rate of temperature fall that 600 DEG C are down to from connection temperature is 20 DEG C/min, is down to from 600 DEG C
Room temperature interval furnace cooling；
The connector of TZM alloys and WRe alloys is obtained after cooling.After measured, the room temperature shear strength of joint is
121MPa。
Embodiment 4
The low temperature diffusion welding of the TZM/WRe different alloys of the present embodiment is carried out as follows：
Step 1,
Surface to be welded to TZM alloys and WRe alloys uses #400, #800, #1000, #1500, #2000 metallographic sand successively
Paper carries out pre-grinding, and then polishing is simultaneously cleaned by ultrasonic in alcohol.
Step 2,
The Ti powder of 46 μm of 0.0158g particle diameters is weighed with electronic balance (precision is 0.1mg), to ensure Ti in later stage connector
Active intermediate thickness is at 60~80 μm.
Step 3,
The TZM alloys handled well, Ti powder and WRe alloys are sequentially placed into graphite former from top to bottom, then with upper and lower
Pressure head is compressed, while making Ti powder active intermediate positioned at the middle position of graphite former height.
Step 4,
The graphite jig that will be equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is less than
8Pa, then passes to DC pulse current, is diffused welding to TZM alloys and WRe alloys, welding condition is：
Axial compressive force is 20MPa,
Heating rate is 100 DEG C/min,
It is 900 DEG C to connect temperature,
Soaking time is 30min,
Rate of temperature fall is：The interval rate of temperature fall that 600 DEG C are down to from connection temperature is 20 DEG C/min, is down to from 600 DEG C
Room temperature interval furnace cooling；
The connector of TZM alloys and WRe alloys is obtained after cooling.After measured, the room temperature shear strength of joint is
136MPa。
Embodiment 5
The low temperature diffusion welding of the TZM/WRe different alloys of the present embodiment is carried out as follows：
Step 1,
Surface to be welded to TZM alloys and WRe alloys uses #400, #800, #1000, #1500, #2000 metallographic sand successively
Paper carries out pre-grinding, and then polishing is simultaneously cleaned by ultrasonic in alcohol.
Step 2,
The Ti powder of 46 μm of 0.0158g particle diameters is weighed with electronic balance (precision is 0.1mg), to ensure Ti in later stage connector
Active intermediate thickness is at 60~80 μm.
Step 3,
The TZM alloys handled well, Ti powder and WRe alloys are sequentially placed into graphite former from top to bottom, then with upper and lower
Pressure head is compressed, while making Ti powder active intermediate positioned at the middle position of graphite former height.
Step 4,
The graphite jig that will be equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is less than
8Pa, then passes to DC pulse current, is diffused welding to TZM alloys and WRe alloys, welding condition is：
Axial compressive force is 50MPa,
Heating rate is 100 DEG C/min,
It is 900 DEG C to connect temperature,
Soaking time is 10min,
Rate of temperature fall is：The interval rate of temperature fall that 600 DEG C are down to from connection temperature is 20 DEG C/min, is down to from 600 DEG C
Room temperature interval furnace cooling；
The connector of TZM alloys and WRe alloys is obtained after cooling.After measured, the room temperature shear strength of joint is
170MPa。
Embodiment 6
The low temperature diffusion welding of the TZM/WRe different alloys of the present embodiment is carried out as follows：
Step 1,
Surface to be welded to TZM alloys and WRe alloys uses #400, #800, #1000, #1500, #2000 metallographic sand successively
Paper carries out pre-grinding, and then polishing is simultaneously cleaned by ultrasonic in alcohol.
Step 2,
The Ti powder of 46 μm of 0.0158g particle diameters is weighed with electronic balance (precision is 0.1mg), to ensure Ti in later stage connector
Active intermediate thickness is at 60~80 μm.
Step 3,
The TZM alloys handled well, Ti powder and WRe alloys are sequentially placed into graphite former from top to bottom, then with upper and lower
Pressure head is compressed, while making Ti powder active intermediate positioned at the middle position of graphite former height.
Step 4,
The graphite jig that will be equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is less than
8Pa, then passes to DC pulse current, is diffused welding to TZM alloys and WRe alloys, welding condition is：
Axial compressive force is 50MPa,
Heating rate is 100 DEG C/min,
It is 900 DEG C to connect temperature,
Soaking time is 60min,
Rate of temperature fall is：The interval rate of temperature fall that 600 DEG C are down to from connection temperature is 20 DEG C/min, is down to from 600 DEG C
Room temperature interval furnace cooling；
The connector of TZM alloys and WRe alloys is obtained after cooling.After measured, the room temperature shear strength of joint is
191MPa。
Embodiment 7
The low temperature diffusion welding of the TZM/WRe different alloys of the present embodiment is carried out as follows：
Step 1,
Surface to be welded to TZM alloys and WRe alloys uses #400, #800, #1000, #1500, #2000 metallographic sand successively
Paper carries out pre-grinding, and then polishing is simultaneously cleaned by ultrasonic in alcohol.
Step 2,
The Ti powder of 46 μm of 0.0158g particle diameters is weighed with electronic balance (precision is 0.1mg), to ensure Ti in later stage connector
Active intermediate thickness is at 60~80 μm.
Step 3,
The TZM alloys handled well, Ti powder and WRe alloys are sequentially placed into graphite former from top to bottom, then with upper and lower
Pressure head is compressed, while making Ti powder active intermediate positioned at the middle position of graphite former height.
Step 4,
The graphite jig that will be equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is less than
8Pa, then passes to DC pulse current, is diffused welding to TZM alloys and WRe alloys, welding condition is：
Axial compressive force is 60MPa,
Heating rate is 20 DEG C/min,
It is 800 DEG C to connect temperature,
Soaking time is 120min,
Rate of temperature fall is：The interval rate of temperature fall that 600 DEG C are down to from connection temperature is 40 DEG C/min, is down to from 600 DEG C
Room temperature interval furnace cooling；
The connector of TZM alloys and WRe alloys is obtained after cooling.After measured, the room temperature shear strength of joint is
197MPa。
Embodiment 8
The low temperature diffusion welding of the TZM/WRe different alloys of the present embodiment is carried out as follows：
Step 1,
Surface to be welded to TZM alloys and WRe alloys uses #400, #800, #1000, #1500, #2000 metallographic sand successively
Paper carries out pre-grinding, and then polishing is simultaneously cleaned by ultrasonic in alcohol.
Step 2,
The Ti powder of 46 μm of 0.0158g particle diameters is weighed with electronic balance (precision is 0.1mg), to ensure Ti in later stage connector
Active intermediate thickness is at 60~80 μm.
Step 3,
The TZM alloys handled well, Ti powder and WRe alloys are sequentially placed into graphite former from top to bottom, then with upper and lower
Pressure head is compressed, while making Ti powder active intermediate positioned at the middle position of graphite former height.
Step 4,
The graphite jig that will be equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is less than
8Pa, then passes to DC pulse current, is diffused welding to TZM alloys and WRe alloys, welding condition is：
Axial compressive force is 40MPa,
Heating rate is 50 DEG C/min,
It is 1000 DEG C to connect temperature,
Soaking time is 60min,
Rate of temperature fall is：The interval rate of temperature fall that 600 DEG C are down to from connection temperature is 30 DEG C/min, is down to from 600 DEG C
Room temperature interval furnace cooling；
The connector of TZM alloys and WRe alloys is obtained after cooling.After measured, the room temperature shear strength of joint is
147MPa。
Embodiment 9
The low temperature diffusion welding of the TZM/WRe different alloys of the present embodiment is carried out as follows：
Step 1,
Surface to be welded to TZM alloys and WRe alloys uses #400, #800, #1000, #1500, #2000 metallographic sand successively
Paper carries out pre-grinding, and then polishing is simultaneously cleaned by ultrasonic in alcohol.
Step 2,
The Ti powder of 46 μm of 0.0158g particle diameters is weighed with electronic balance (precision is 0.1mg), to ensure Ti in later stage connector
Active intermediate thickness is at 60~80 μm.
Step 3,
The TZM alloys handled well, Ti powder and WRe alloys are sequentially placed into graphite former from top to bottom, then with upper and lower
Pressure head is compressed, while making Ti powder active intermediate positioned at the middle position of graphite former height.
Step 4,
The graphite jig that will be equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is less than
8Pa, then passes to DC pulse current, is diffused welding to TZM alloys and WRe alloys, welding condition is：
Axial compressive force is 30MPa,
Heating rate is 80 DEG C/min,
It is 900 DEG C to connect temperature,
Soaking time is 60min,
Rate of temperature fall is：The interval rate of temperature fall that 600 DEG C are down to from connection temperature is 20 DEG C/min, is down to from 600 DEG C
Room temperature interval furnace cooling；
The connector of TZM alloys and WRe alloys is obtained after cooling.After measured, the room temperature shear strength of joint is
215MPa。
Embodiment 10
The low temperature diffusion welding of the TZM/WRe different alloys of the present embodiment is carried out as follows：
Step 1,
Surface to be welded to TZM alloys and WRe alloys uses #400, #800, #1000, #1500, #2000 metallographic sand successively
Paper carries out pre-grinding, and then polishing is simultaneously cleaned by ultrasonic in alcohol.
Step 2,
The Ti powder of 46 μm of 0.0158g particle diameters is weighed with electronic balance (precision is 0.1mg), to ensure Ti in later stage connector
Active intermediate thickness is at 60~80 μm.
Step 3,
The TZM alloys handled well, Ti powder and WRe alloys are sequentially placed into graphite former from top to bottom, then with upper and lower
Pressure head is compressed, while making Ti powder active intermediate positioned at the middle position of graphite former height.
Step 4,
The graphite jig that will be equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is less than
8Pa, then passes to DC pulse current, is diffused welding to TZM alloys and WRe alloys, welding condition is：
Axial compressive force is 20MPa,
Heating rate is 200 DEG C/min,
It is 1000 DEG C to connect temperature,
Soaking time is 30min,
Rate of temperature fall is：The interval rate of temperature fall that 600 DEG C are down to from connection temperature is 10 DEG C/min, is down to from 600 DEG C
Room temperature interval furnace cooling；
The connector of TZM alloys and WRe alloys is obtained after cooling.After measured, the room temperature shear strength of joint is
126MPa。
Embodiment 11
The low temperature diffusion welding of the TZM/WRe different alloys of the present embodiment is carried out as follows：
Step 1,
Surface to be welded to TZM alloys and WRe alloys uses #400, #800, #1000, #1500, #2000 metallographic sand successively
Paper carries out pre-grinding, and then polishing is simultaneously cleaned by ultrasonic in alcohol.
Step 2,
The Ti powder of 46 μm of 0.0158g particle diameters is weighed with electronic balance (precision is 0.1mg), to ensure Ti in later stage connector
Active intermediate thickness is at 60~80 μm.
Step 3,
The TZM alloys handled well, Ti powder and WRe alloys are sequentially placed into graphite former from top to bottom, then with upper and lower
Pressure head is compressed, while making Ti powder active intermediate positioned at the middle position of graphite former height.
Step 4,
The graphite jig that will be equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is less than
8Pa, then passes to DC pulse current, is diffused welding to TZM alloys and WRe alloys, welding condition is：
Axial compressive force is 20MPa,
Heating rate is 300 DEG C/min,
It is 1100 DEG C to connect temperature,
Soaking time is 10min,
Rate of temperature fall is：The interval rate of temperature fall that 1000 DEG C are down to from connection temperature is 5 DEG C/min, is down to from 1000 DEG C
600 DEG C of interval rate of temperature fall is 14 DEG C/min, and the interval furnace cooling of room temperature is down to from 600 DEG C；
The connector of TZM alloys and WRe alloys is obtained after cooling.After measured, the room temperature shear strength of joint is
97MPa。
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 any modifications, equivalent substitutions and improvements made within principle etc., it should be included in the scope of the protection.
Claims (5)
1. a kind of law temperature joining method of TZM and WRe different alloys, it is characterised in that：It is, using Ti powder as active intermediate, to lead to
Overdischarge plasma sintering technique is diffused welding to TZM alloys and WRe alloys under the recrystallization temperature less than mother metal, from
And obtain the connector of TZM alloys and WRe alloys.
2. the law temperature joining method of TZM and WRe different alloys according to claim 1, it is characterised in that including following step
Suddenly：
Step 1,
Take TZM alloys and WRe alloys to be connected, the surface to be connected of TZM alloys and WRe alloys is carried out pre-grinding, polishing and
It is cleaned by ultrasonic and is dried in vacuo；
Step 2,
Weigh Ti powder of the particle diameter at 30~60 μm；
Step 3,
Graphite jig is taken, the graphite jig includes seaming chuck, push-down head and graphite former；
The TZM alloys handled well, Ti powder and the WRe alloys handled well are sequentially placed into graphite former from bottom to top, Ran Houyong
Seaming chuck and push-down head are compressed, while making Ti powder active intermediate positioned at the middle position of graphite former height；
Step 4,
The graphite jig that will be equipped with part to be connected is placed in the burner hearth of discharge plasma sintering system, is evacuated to less than 8Pa, so
After be passed through DC pulse current, welding is diffused to TZM alloys and WRe alloys, welding condition is：
Axial compressive force is 20~60MPa,
Heating rate is 20~300 DEG C/min,
It is 800~1100 DEG C to connect temperature,
Soaking time is 10~120min,
Rate of temperature fall is：The interval rate of temperature fall that 600 DEG C are down to from connection temperature is 2~40 DEG C/min, and room is down to from 600 DEG C
Furnace cooling between warm area；
The connector of TZM alloys and WRe alloys is obtained after cooling, and the thickness of the Ti active intermediates of the connector is 40
~120 μm.
3. the law temperature joining method of TZM and WRe different alloys according to claim 2, it is characterised in that：The connection temperature
Spend for 800~1100 DEG C when, correspondence apply pulse direct current current density be 400~600A/cm2。
4. the law temperature joining method of TZM and WRe different alloys according to claim 2, it is characterised in that：Described in step 4
Welding condition is：
Axial compressive force is 50MPa,
Heating rate is 100 DEG C/min,
It is 900 DEG C to connect temperature,
Soaking time is 30min,
Rate of temperature fall is：The interval rate of temperature fall that 600 DEG C are down to from 900 DEG C is 20 DEG C/min, be down to from 600 DEG C room temperature it is interval with
Stove is cooled down.
5. the law temperature joining method of the TZM and WRe different alloys according to claim 2 or 4, it is characterised in that：The company
The thickness of the Ti active intermediates of fitting is at 60~80 μm.
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