CN110181050A - A kind of SPS sintering connection method of WRe/TZM/ graphite - Google Patents

A kind of SPS sintering connection method of WRe/TZM/ graphite Download PDF

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Publication number
CN110181050A
CN110181050A CN201910479310.9A CN201910479310A CN110181050A CN 110181050 A CN110181050 A CN 110181050A CN 201910479310 A CN201910479310 A CN 201910479310A CN 110181050 A CN110181050 A CN 110181050A
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temperature
graphite
tzm
wre
low
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CN110181050B (en
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张久兴
沈学峰
施加利
韩翠柳
潘亚飞
杨新宇
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Hefei University of Technology
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Hefei University of Technology
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/02Compacting only
    • B22F3/03Press-moulding apparatus therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10Sintering only
    • B22F3/105Sintering only by using electric current other than for infra-red radiant energy, laser radiation or plasma ; by ultrasonic bonding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22FWORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/02Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
    • B22F7/04Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers with one or more layers not made from powder, e.g. made from solid metal
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C27/00Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
    • C22C27/04Alloys based on tungsten or molybdenum

Abstract

The invention discloses a kind of SPS of WRe/TZM/ graphite to be sintered connection method, using graphite gradient mold, while realizing WRe alloy powder and TZM alloy powder gradient sintering by SPS technology, the dissimilar material joining between TZM alloy powder and graphite block body is realized using titanium foil as intermediate layer, to obtain WRe/TZM/ graphite dissimilar material joining part.Densified sintering product can be obtained in connection method through the invention, the good WRe/TZM/ graphite dissimilar material joining part of uniform, bond strength height, perfect heat-dissipating, thermal-shock resistance is spread at company interface, WRe alloy-layer consistency reaches 98.07%, TZM alloy-layer consistency and reaches 97.98%, uniformly, the connector room temperature side shear strength WRe/TZM is up to 303.9MPa, TZM/ graphite side up to 31.2MPa for joint face diffusion.

Description

A kind of SPS sintering connection method of WRe/TZM/ graphite
Technical field
The present invention relates to a kind of sintering connection methods of dissimilar material, and in particular to a kind of SPS burning of WRe/TZM/ graphite Tie connection method.
Background technique
WRe alloy is the alloy as composed by W and Re, and W fusing point is high, elevated temperature strength is big, perfect heat-dissipating, atomic number Height can excite strong x-ray under electron bombardment, but W has notch sensitive effect, be easy to cause the extension of crackle, deepen, To make target matrix stripping, 500 DEG C of W high of the recrystallization temperature ratio of Re, and Re, there is no mould crisp transition temperature.Therefore, Re The brittleness at room temperature that can significantly improve W is added, reduces and moulds crisp transition temperature, and can be in the mechanical property of certain high-temperature area enhancing W Energy.TZM alloy is a kind of molybdenum-base alloy being widely used, and is mainly used in aerospace, power generation, nuclear reactor, army at present The fields such as thing, medical instrument have high-melting-point, high elastic modulus, strong corrosion resistant, low thermal coefficient of expansion, high heat conductance and excellent The features such as different mechanical behavior under high temperature.Graphite is a kind of widely used carbon materials, and special structure makes it have high temperature resistant The performances such as property, good electrical and thermal conductivity, good chemical stability, anti-thermal shock, but graphite material intensity is not high, in modern work Usually graphite and metal bonding can be got up use in industry, such as heat transfer component of high-power CT machine target, fusion reactor Deng this composite construction while the excellent properties with graphite and metal.In addition, the density of graphite will be far below general alloy, Lightweight is one of modern industry probing direction, under the premise of guaranteeing equipment quality, output power can be improved, reduce energy Consumption, raising service life of equipment etc..
The prior art obtain WRe/TZM/ graphite connector to be realized by multistep, usually first sintering preparation WRe alloy, TZM alloy, then WRe alloy is connect with TZM alloy diffusion, then by WRe-TZM alloy connector and joining of graphite, technique is multiple Miscellaneous, higher cost, carrying out every step step by step can all cause alloy surface to be carbonized, and be needed in the next steps through machining removal carbonization Layer, material loss are serious.
Summary of the invention
The present invention is based on connect at present to WRe alloy powder with TZM sintering alloy powder technology, WRe alloy with TZM alloy A kind of exploration of technology, TZM alloy and joining of graphite technology, it is desirable to provide SPS sintering connection method of WRe/TZM/ graphite.This Invention can guarantee that under the premise of densified sintering product, connection are good, a step realizes the sintering connection of WRe/TZM/ graphite, effectively simplifies Process flow, stock utilization is high, greatly reduces energy consumption.
The present invention connects the solid state sintering that SPS technology is applied to refractory alloy with solid-state diffusion, is made by the way that titanium foil is added For intermediate layer, to reduce welding temperature, and complete solid solution is formed by atom counterdiffusion in weld seam, and then improve weldering The mechanical property of connector.
The SPS of WRe/TZM/ graphite of the present invention is sintered connection method, includes the following steps:
Step 1: amount weighs W-5%Re alloy powder and TZM alloy powder raw material according to the ratio;Select with a thickness of 200 μm, it is pure The titanium foil of degree >=99.0% carries out pickling, ultrasonic cleaning and dries, as intermediate layer;Graphite to be connected is taken, to graphite Surface to be welded carries out pre-grinding, polishing and ultrasonic cleaning and is dried in vacuo;
Step 2: taking the cavity plate of graphite gradient mold to load onto bushing and push-down head, load weighted TZM powder is first put into stone It in black mold, is compacted using hand-operated hydraulic press precompressed, then load weighted W-5%Re alloy powder is placed in the TZM powder of compacting Upside is compacted using hand-operated hydraulic press precompressed, and precompressed parameter is pressure maintaining 2min under 10MPa pressure, push-down head is then removed, by titanium Foil is placed in the TZM powder side after precompressed, adds graphite block body, finally adds upper push-down head, 10MPa pressure entirety precompressed 2min;In precompressed, the dress sample sequence of sample sequentially consists of graphite block body, titanium foil, TZM alloy-layer, W-5%Re alloy Layer.
Step 3: the graphite jig equipped with connector to be sintered that step 2 is obtained is placed in discharge plasma sintering system It in burner hearth, is evacuated to lower than 10Pa, then passes to DC pulse current, carry out gradient sintering connection.
In step 1, graphite to be connected directly is polished, is then cleaned by ultrasonic in alcohol, the graphite handled well is made Surface to be welded flatness no more than 0.1mm, roughness be not more than 0.1 μm.Density >=1.86g/cm of the graphite3, resist Roll over intensity >=59.0MPa.
In step 1, the Fisher particle size of the W-5%Re alloy powder is 3~4 μm, the Fei Shi grain of the TZM alloy powder Degree is 2~3 μm.
In step 1, the pickling is that the dilute hydrochloric acid for the use of volumetric concentration being 5% impregnates titanium foil 10 minutes;The ultrasound Cleaning is carried out in alcohol.
In step 2, the graphite gradient mold includes cavity plate, bushing, seaming chuck and push-down head.
The cavity plate is the hollow cavity structure of perforation, and the cavity plate is divided into upper and lower two according to the difference of cavity plate wall thickness Part, top are that high-temperature region lower part is low-temperature space, and during being sintered connection, cavity plate high-temperature region and low-temperature space are in the horizontal direction Interface be overlapped with the upper surface of TZM alloy-layer, high-temperature region with meet WRe alloy sintering densification temperature, low-temperature space with Meet the densification of TZM alloy sintering and TZM alloy and the close-connected temperature of graphite block body.The wall thickness of high-temperature region is less than low-temperature space Wall thickness, the temperature difference of high-temperature region and low-temperature space regulated and controled by wall thickness, passes through the thermometer hole point being arranged in high-temperature region and low-temperature space Not Ce Liang high-temperature region and low-temperature space temperature.
The bushing is set to the inner surface of the cavity plate hollow cavity, is hollow graphite pipe, for placing WRe alloyed powder End, TZM alloy powder and graphite block body.Since cavity plate is provided with thermometer hole, high pressure unbalance stress cavity plate easy to damage, bushing can be effective Avoid this phenomenon.
In assembly, the push-down head plays support out of the cavity plate is inserted into the bottom of the cavity plate hollow cavity Effect;The seaming chuck is out of, the cavity plate is inserted on the top of the cavity plate hollow cavity, to apply pressure to sample.
Further, the vertical section of the push-down head is in inverted T-type structure, in assembly, the vertical projections portion of inverted T-type structure Divide out of, the cavity plate is inserted into the bottom of the cavity plate hollow cavity, the lateral part of inverted T-type structure is located at the cavity plate Lower section is combined closely with cavity plate, plays position-limiting action.
During being sintered connection, when low-temperature space reaches sintering temperature, the temperature difference of high-temperature region and low-temperature space is 200- 220℃。
Above-mentioned all temperature are subject to thermometer hole temperature.
In step 3, gradient sintering Joining Technology parameter setting is as follows:
Axial compressive force: fixed push-down head applies pressure 20-40MPa by seaming chuck;
Heating rate: it is heated up with the heating rate of 20-70 DEG C/min, when low-temperature space reaches 1450~1650 DEG C of sintering temperature When, stop heating, keeps the temperature 10-60min;
Sintering connection temperature: 1450-1650 DEG C (low-temperature space);
Rate of temperature fall: the rate of temperature fall that 1000 DEG C of section is down to from connection temperature 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, from 600 DEG C to the furnace cooling of room temperature section;WRe/ is obtained after cooling TZM/ graphite dissimilar material joining part.
Said welding method condition is groped and is obtained based on univariate Scientific experimental design and many experiments, With this condition, the comprehensive performance of product is optimal.
Compared with prior art, the beneficial effects of the present invention are embodied in:
1, densified sintering product can be obtained in connection method through the invention, uniform, bond strength height, thermal diffusivity are spread in company interface The WRe/TZM/ graphite dissimilar material joining part that energy is good, thermal-shock resistance is good.
2, the present invention uses SPS Diffusion Welding technology, have process flow is simple, technological parameter is easy to control, quality is stable, Strong operability connects the characteristics of temperature is low, low energy consumption, to reduce production cycle and cost.
3, the present invention, can step realization WRe/TZM/ graphite sintering connection by gradient mold.The invention can ensure that burning Under the premise of knot is fine and close, connection is good, effective simplification of flowsheet greatly reduces energy consumption, reduce the production cycle and at This.
The WRe/TZM/ graphite composite material obtained through the invention, WRe alloy-layer consistency reach 98.07%, TZM conjunction Layer gold consistency reaches 97.98%, joint face diffusion uniformly, the connector room temperature side shear strength WRe/TZM up to 303.9MPa, TZM/ graphite side is up to 31.2MPa., needs of production can be met.
Detailed description of the invention
Fig. 1 and Fig. 2 is gradient mould structure and dress sample schematic diagram.
Figure label: 1 seaming chuck, 2 bushings, 3 cavity plates, 4 thermometer holes, 5 push-down heads, 6WRe alloy-layer, 7TZM alloy-layer, 8Ti foil, 9 graphite block bodies.
Specific embodiment
Below by specific embodiment, technical scheme of the present invention is further explained, but embodiments of the present invention are not It is only limitted to this.
Discharge plasma sintering furnace used in following embodiments is the LABOX- of Sinter Land inc company, Japan production 6020hv discharge plasma sintering system, current type are DC pulse current, pulse train 40:7;Gradient graphite used Die bushing internal diameter is Φ 30mm, and gradient mold is divided into upper and lower two parts, and top is divided into high-temperature region, lower part is divided into low-temperature space, ladder The Wall-Thickness Difference for spending mold high-temperature region and low-temperature space is 10mm, so that high-temperature region and the low-temperature space temperature difference meet WRe alloy and TZM alloy Sintering densification required temperature and graphite and TZM alloy solid diffusivity temperature.
WRe alloy powder used in following embodiments (W-5%Re alloy powder) is from the limited public affairs of Weihai polycrystalline tungsten science and technology Department, 3~4 μm of Fisher particle size.
TZM alloy powder used in following embodiments come from Jinduicheng Molybdenum Co., Ltd, 2~3 μm of Fisher particle size.
Block graphite used in following embodiments comes from Japanese East Sea Tan Su Co., Ltd., is the high-strength graphite of trade mark G535.
Following embodiment measured temperatures are on the basis of measuring low-temperature space thermometer hole temperature, high-temperature region thermometer hole subsidiary.
Embodiment 1:
The SPS Diffusion Welding of TZM and graphite dissimilar material carry out as follows in the present embodiment:
1, graphite to be connected is taken, pre-grinding, polishing and ultrasonic cleaning are carried out to the surface to be welded of graphite and is dried in vacuo, is guaranteed The flatness of the surface to be welded of graphite is not more than 0.1 μm no more than 0.1mm, roughness.
2, pickling 10min in the dilute hydrochloric acid for being 5% as volumetric concentration by titanium foil, is subsequently placed in alcohol and is cleaned by ultrasonic, Finally it is dried for standby.
3, W-5%Re alloy powder and TZM alloy powder raw material are weighed on demand.
4, graphite cavity plate is taken to load onto bushing and push-down head, successively by load weighted TZM alloy powder, WRe alloy powder It is put into graphite jig, hand-operated hydraulic press is respectively adopted and carries out precompressed, pressure 10MPa, pressure maintaining 2min then remove pushing Ti foil is placed in TZM powder side after precompressed, adds graphite block body, finally adds upper push-down head by head, and 10MPa pressure is integrally pre- Press 2min.
5, the graphite jig equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is lower than 10Pa then passes to DC pulse current, is sintered Joining Technology are as follows:
Axial compressive force: fixed push-down head applies pressure 30MPa by seaming chuck;
Heating rate: being heated up with the heating rate of 20-70 DEG C/min, when low-temperature space reaches sintering temperature 1450, is stopped Heating keeps the temperature 30min;
Sintering connection temperature: 1500 DEG C (low-temperature space), 1690 DEG C (high-temperature region);
Rate of temperature fall: the rate of temperature fall for being down to 1000 DEG C of section from connection temperature is 10 DEG C/min, from connection temperature drop Rate of temperature fall to 600 DEG C of sections is 20 DEG C/min, from 600 DEG C to the furnace cooling of room temperature section;It obtains after cooling WRe/TZM/ graphite dissimilar material joining part.
After tested, WRe/TZM/ graphite composite material obtained by this example, WRe alloy-layer consistency reach 94.53%, TZM Alloy-layer consistency reaches 97.55%, joint face diffusion uniformly, the connector room temperature side shear strength WRe/TZM up to 283.8MPa, TZM/ graphite side is up to 23.6MPa.
Embodiment 2:
The SPS Diffusion Welding of TZM and graphite dissimilar material carry out as follows in the present embodiment:
1, graphite to be connected is taken, pre-grinding, polishing and ultrasonic cleaning are carried out to the surface to be welded of graphite and is dried in vacuo, is guaranteed The flatness of the surface to be welded of graphite is not more than 0.1 μm no more than 0.1mm, roughness.
2, pickling 10min in the dilute hydrochloric acid for being 5% as volumetric concentration by titanium foil, is subsequently placed in alcohol and is cleaned by ultrasonic, Finally it is dried for standby.
3, W-5%Re alloy powder and TZM alloy powder raw material are weighed on demand.
4, graphite cavity plate is taken to load onto bushing and push-down head, successively by load weighted TZM alloy powder, WRe alloy powder It is put into graphite jig, hand-operated hydraulic press is respectively adopted and carries out precompressed, pressure 10MPa, pressure maintaining 2min then remove pushing Ti foil is placed in TZM powder side after precompressed, adds graphite block body, finally adds upper push-down head by head, and 10MPa pressure is integrally pre- Press 2min.
5, the graphite jig equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is lower than 10Pa then passes to DC pulse current, is sintered Joining Technology are as follows:
Axial compressive force: fixed push-down head applies pressure 30MPa by seaming chuck;
Heating rate: it is heated up with the heating rate of 20-70 DEG C/min, when low-temperature space reaches 1550 DEG C of sintering temperature, is stopped It only heats up, keeps the temperature 30min;
Sintering connection temperature: 1550 DEG C (low-temperature space), 1780 DEG C (high-temperature region);
Rate of temperature fall: the rate of temperature fall for being down to 1000 DEG C of section from connection temperature is 10 DEG C/min, from connection temperature drop Rate of temperature fall to 600 DEG C of sections is 20 DEG C/min, from 600 DEG C to the furnace cooling of room temperature section;It obtains after cooling WRe/TZM/ graphite dissimilar material joining part.
After tested, WRe/TZM/ graphite composite material obtained by this example, WRe alloy-layer consistency reach 98.07%, TZM Alloy-layer consistency reaches 97.98%, joint face diffusion uniformly, the connector room temperature side shear strength WRe/TZM up to 303.9MPa, TZM/ graphite side is up to 31.2MPa.
Embodiment 3:
The SPS Diffusion Welding of TZM and graphite dissimilar material carry out as follows in the present embodiment:
1, graphite to be connected is taken, pre-grinding, polishing and ultrasonic cleaning are carried out to the surface to be welded of graphite and is dried in vacuo, is guaranteed The flatness of the surface to be welded of graphite is not more than 0.1 μm no more than 0.1mm, roughness.
2, pickling 10min in the dilute hydrochloric acid for being 5% as volumetric concentration by titanium foil, is subsequently placed in alcohol and is cleaned by ultrasonic, Finally it is dried for standby.
3, W-5%Re alloy powder and TZM alloy powder raw material are weighed on demand.
4, graphite cavity plate is taken to load onto bushing and push-down head, successively by load weighted TZM alloy powder, WRe alloy powder It is put into graphite jig, hand-operated hydraulic press is respectively adopted and carries out precompressed, pressure 10MPa, pressure maintaining 2min then remove pushing Ti foil is placed in TZM powder side after precompressed, adds graphite block body, finally adds upper push-down head by head, and 10MPa pressure is integrally pre- Press 2min.
5, the graphite jig equipped with to-be-welded pieces is placed in the burner hearth of discharge plasma sintering system, is evacuated to and is lower than 10Pa then passes to DC pulse current, is sintered Joining Technology are as follows:
Axial compressive force: fixed push-down head applies pressure 30MPa by seaming chuck;
Heating rate: it is heated up with the heating rate of 20-70 DEG C/min, when low-temperature space reaches 1550 DEG C of sintering temperature, is stopped It only heats up, keeps the temperature 15min;
Sintering connection temperature: 1550 DEG C (low-temperature space), 1770 DEG C (high-temperature region);
Rate of temperature fall: the rate of temperature fall for being down to 1000 DEG C of section from connection temperature is 10 DEG C/min, from connection temperature drop Rate of temperature fall to 600 DEG C of sections is 20 DEG C/min, from 600 DEG C to the furnace cooling of room temperature section;It obtains after cooling WRe/TZM/ graphite dissimilar material joining part.
After tested, WRe/TZM/ graphite composite material obtained by this example, WRe alloy-layer consistency reach 98.04%, TZM Alloy-layer consistency reaches 97.82%, joint face diffusion uniformly, the connector room temperature side shear strength WRe/TZM up to 296.0MPa, TZM/ graphite side is up to 29.9MPa.

Claims (10)

1. a kind of SPS of WRe/TZM/ graphite is sintered connection method, it is characterised in that:
Using graphite gradient mold, while realizing WRe alloy powder and TZM alloy powder gradient sintering by SPS technology, with Titanium foil realizes the dissimilar material joining between TZM alloy powder and graphite block body as intermediate layer, to obtain WRe/TZM/ Graphite dissimilar material joining part.
2. according to the method described in claim 1, it is characterized by:
The graphite gradient mold includes cavity plate, bushing, seaming chuck and push-down head;
The cavity plate is the hollow cavity structure of perforation, and the cavity plate is divided into upper and lower two parts according to the difference of cavity plate wall thickness, Top is high-temperature region, and lower part is low-temperature space;During being sintered connection, cavity plate high-temperature region and in the horizontal direction point of low-temperature space Interface is overlapped with the upper surface of TZM alloy-layer;The wall thickness of high-temperature region is less than the wall thickness of low-temperature space, the temperature of high-temperature region and low-temperature space Difference is regulated and controled by wall thickness.
3. according to the method described in claim 2, it is characterized by:
Thermometer hole is respectively arranged in high-temperature region and low-temperature space to measure the temperature of high-temperature region and low-temperature space.
4. according to the method described in claim 2, it is characterized by:
The vertical section of the push-down head is in inverted T-type structure, and in assembly, the vertical projections part of inverted T-type structure is from the cavity plate Bottom be inserted into the hollow cavity of the cavity plate, the lateral part of inverted T-type structure is located at the lower section of the cavity plate, tight with cavity plate Close combination, plays position-limiting action.
5. according to the method described in claim 2, it is characterized by comprising following steps:
Step 1: amount weighs W-5%Re alloy powder and TZM alloy powder raw material according to the ratio;Select with a thickness of 200 μm, purity >= 99.0% titanium foil carries out pickling, ultrasonic cleaning and dries, as intermediate layer;Graphite to be connected is taken, to the to be welded of graphite Junction carries out pre-grinding, polishing and ultrasonic cleaning and is dried in vacuo;
Step 2: taking the cavity plate of graphite gradient mold to load onto bushing and push-down head, load weighted TZM powder is first put into graphite mo(u)ld It in tool, is compacted using hand-operated hydraulic press precompressed, then load weighted W-5%Re alloy powder is placed on the upside of the TZM powder of compacting, It is compacted using hand-operated hydraulic press precompressed, precompressed parameter is pressure maintaining 2min under 10MPa pressure, then removes push-down head, titanium foil is set TZM powder side after precompressed, adds graphite block body, finally adds upper push-down head, 10MPa pressure entirety precompressed 2min;? When precompressed, the dress sample sequence of sample sequentially consists of graphite block body, titanium foil, TZM alloy-layer, W-5%Re alloy-layer;
Step 3: the graphite jig equipped with connector to be sintered that step 2 is obtained is placed in the burner hearth of discharge plasma sintering system In, it is evacuated to lower than 10Pa, then passes to DC pulse current, carry out gradient sintering connection.
6. according to the method described in claim 5, it is characterized in that
In step 1, graphite to be connected directly is polished, is then cleaned by ultrasonic in alcohol, make the graphite handled well to The flatness of welding surface is not more than 0.1 μm no more than 0.1mm, roughness;Density >=1.86g/cm of the graphite3, anti-folding is by force Degree >=59.0MPa.
7. according to the method described in claim 5, it is characterized in that
In step 1, the Fisher particle size of the W-5%Re alloy powder is 3~4 μm, and the Fisher particle size of the TZM alloy powder is 2~3 μm.
8. according to the method described in claim 5, it is characterized in that
In step 1, the pickling is that the dilute hydrochloric acid for the use of volumetric concentration being 5% impregnates titanium foil 10 minutes;The ultrasonic cleaning It is to be carried out in alcohol.
9. according to the method described in claim 5, it is characterized in that
In step 3, gradient sintering Joining Technology parameter setting is as follows:
Axial compressive force: fixed push-down head applies pressure 20-40MPa by seaming chuck;
Heating rate: being heated up with the heating rate of 20-70 DEG C/min, when low-temperature space reaches 1450~1650 DEG C of sintering temperature, Stop heating, keeps the temperature 10-60min;
Sintering connection temperature: 1450-1650 DEG C of low-temperature space;
Rate of temperature fall: the rate of temperature fall that 1000 DEG C of section is down to from connection temperature is 10 DEG C/min, is down to 600 DEG C from 1000 DEG C The rate of temperature fall in section be 20 DEG C/min, from 600 DEG C to the furnace cooling of room temperature section;WRe/TZM/ stone is obtained after cooling Black dissimilar material joining part.
10. according to the method described in claim 9, it is characterized by:
During being sintered connection, when low-temperature space reaches sintering temperature, the temperature difference of high-temperature region and low-temperature space is 200-220 ℃。
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Cited By (4)

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Publication number Priority date Publication date Assignee Title
CN111014869A (en) * 2019-12-18 2020-04-17 西安瑞福莱钨钼有限公司 Vacuum welding method of molybdenum-based graphite
CN112091211A (en) * 2020-08-20 2020-12-18 上海交通大学 Preparation method of diffusion multi-element joint
CN112958772A (en) * 2021-02-02 2021-06-15 合肥工业大学 Method for repairing waste WRe/TZM composite rotary anode target disc
CN112958770A (en) * 2021-02-02 2021-06-15 合肥工业大学 Preparation method of WRe/TZM composite material

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