CN106180653A - Discharge plasma sintering prepares the method for copper tungsten contact material - Google Patents
Discharge plasma sintering prepares the method for copper tungsten contact material Download PDFInfo
- Publication number
- CN106180653A CN106180653A CN201610638086.XA CN201610638086A CN106180653A CN 106180653 A CN106180653 A CN 106180653A CN 201610638086 A CN201610638086 A CN 201610638086A CN 106180653 A CN106180653 A CN 106180653A
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- Prior art keywords
- copper
- contact material
- copper tungsten
- sintering
- plasma sintering
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- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 238000005245 sintering Methods 0.000 title claims abstract description 38
- 239000000463 material Substances 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 31
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000010439 graphite Substances 0.000 claims abstract description 46
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 46
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910052802 copper Inorganic materials 0.000 claims abstract description 37
- 239000010949 copper Substances 0.000 claims abstract description 37
- 230000001681 protective effect Effects 0.000 claims abstract description 17
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000004568 cement Substances 0.000 claims abstract description 14
- 239000002131 composite material Substances 0.000 claims abstract description 14
- 238000010792 warming Methods 0.000 claims abstract description 14
- 238000007731 hot pressing Methods 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000005498 polishing Methods 0.000 claims abstract description 6
- 238000004506 ultrasonic cleaning Methods 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 13
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000001257 hydrogen Substances 0.000 claims description 5
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000004904 shortening Methods 0.000 abstract 1
- 239000011248 coating agent Substances 0.000 description 10
- 238000000576 coating method Methods 0.000 description 10
- 239000011230 binding agent Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- 229910052721 tungsten Inorganic materials 0.000 description 5
- 239000010937 tungsten Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical group O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 239000010445 mica Substances 0.000 description 4
- 229910052618 mica group Inorganic materials 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 229940072033 potash Drugs 0.000 description 4
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Substances [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000010891 electric arc Methods 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 239000011812 mixed powder Substances 0.000 description 2
- 235000015320 potassium carbonate Nutrition 0.000 description 2
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 description 2
- 239000012286 potassium permanganate Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000005361 soda-lime glass Substances 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
- B22D23/04—Casting by dipping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/14—Both compacting and sintering simultaneously
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/045—Alloys based on refractory metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/04—Alloys based on tungsten or molybdenum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
- B22F2003/1051—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding by electric discharge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
Abstract
The invention discloses a kind of method that discharge plasma sintering prepares copper tungsten contact material, comprise the following steps: step 1, pour tungsten powder into graphite jig, it is positioned in plasma sintering stove evacuation and pressurizes, it is passed through pulsed direct current and is warming up to 1,320 1480 DEG C, after being incubated 2.5 5min, furnace cooling obtains W skeleton；Step 2, by clean to copper billet polishing ultrasonic cleaning, carry out laser with laser with the speed of 10 500 mm/second and irradiates scanning, then carry out Cement Composite Treated by Plasma, obtains that molten to ooze copper billet standby；Step 3, puts into W skeleton in graphite boat, and the molten copper billet that oozes is placed on W skeleton, around uses schmigel landfill, is placed in the high temperature sintering furnace with protective gas atmosphere, after being warming up to 1,300 1400 DEG C, is incubated 23 hours, the copper tungsten sintered body after being sintered；Step 4, is 50 100MPa by copper tungsten sintered body at pressure, and temperature carries out evacuation hot pressing under conditions of being 800 850 DEG C, is cooled to room temperature, i.e. obtains copper tungsten contact material.Production method of the present invention has the advantage shortening the production cycle.
Description
Technical field
The present invention relates to electrical contact preparing technical field, be specifically related to a kind of discharge plasma sintering and prepare copper tungsten contact material
The method of material.
Background technology
The heart element of high-voltage switch gear, by its disjunction with connect, reach to transmit, bear, disconnect, control the mesh of energy
's.High-voltage electric contact high voltage, big electric current, high-temperature electric arc common effect under its Reliability of Microprocessor, durability, stability be
Affect the key factor of the stability of switch life, safe and reliable and electrical network.
Copper tungsten contact is relatively strong due to resistance to electric arc ability, especially during chopper deciliter, can produce electric arc, substantial amounts of
Energy is on contact, and the material of the most resistance to burning is to ensure that the essential condition of chopper electrical endurance.
The disclosure of the invention of the Publication No. CN102800420A manufacture method of a kind of copper tungsten contact, the method includes following
Step: (1) tungsten processed base: by tungsten powder, forming agent, wetting agent according to weight ratio 2100: 11: 15 mix and blend, be then placed in molding
Mould inner pressure makes type, obtains tungsten base；(2) graphite crucible is made: according to the size of copper tungsten contact to be made, choose correspondence
Graphite bar and processed prepare inner chamber be the graphite crucible of contact shape；(3) graphite crucible is dried: put by graphite crucible
Enter drying in oven；(4) protection graphite crucible: brushing graphite water preparation or stickup graphite paper on the inwall of graphite crucible, then
Graphite crucible is put into baking oven inside holding；(5) copper-bearing materials is prepared: according to weight and the graphite of copper tungsten contact to be made
The inner chamber size of crucible, makes corresponding copper-bearing materials；(6) dress crucible: tungsten base is put into bottom graphite crucible, then by cupric
Graphite crucible put into by material, and is placed on the upper surface of tungsten base；(7) shove charge evacuation heating infiltration: by the graphite after charging
The heater of vacuum drying oven put into by crucible, closes fire door and starts vacuum pump and carry out evacuation, heater after evacuation
Heating graphite crucible, copper-bearing materials infiltration enters in tungsten base to obtain copper tungsten contact；(8) cooling: after having heated, at constant temperature
Under state, graphite crucible is slowly exited heater, is then shut off heater；(9) come out of the stove: after closing heater, close vacuum pump,
Open fire door and take out graphite crucible, from graphite crucible, take out copper tungsten contact.
From the above-mentioned technical process preparing copper tungsten contact material it can be seen that need tungsten powder molding in advance, molding link
Typically completed by uniformly interpolation forming agent and hydraulic press, and before high temperature oozes copper, carry out presintering, to promote copper tungsten contact
Material combination property, presintering, by relying on vacuum sintering furnace to complete, causes the shortcomings such as production cost is high, power consumption is big.At high pressure
Under the background that switching requirements constantly promotes, the preparation of copper tungsten contact material improves optimization and becomes particularly significant.
Summary of the invention
For the problems referred to above, it is an object of the invention to provide a kind of electric discharge etc. shortened the production cycle and reduce energy consumption
Ion sintering prepares the method for copper tungsten contact material.
The technical scheme solving above-mentioned technical problem is as follows:
Discharge plasma sintering prepares the method for copper tungsten contact material, comprises the following steps:
Step 1, sintering: pour tungsten powder into graphite jig, mould is placed in hydrogen furnace, powder is reduced, gently
Burn, come out of the stove, be positioned in plasma sintering stove evacuation and pressurize, after pressure reaches 30-45MPa, being passed through pulse direct current
Electric current is also warming up to 1320-1480 DEG C, and after insulation 2.5-5min, furnace cooling obtains W skeleton；
Step 2, copper billet processes: take copper billet, first mechanically polishes, and the copper billet after polishing is in ultrasonic cleaning solution
Carrying out ultrasonic waves for cleaning, supersonic frequency is 35-50KHz, and temperature is 30-38 DEG C, after drying, with power be 5-20 watt continuously or
Pulse laser carries out laser with the speed of 10-500 mm/second and irradiates scanning, is cooled to room temperature, then carries out Cement Composite Treated by Plasma,
Obtain that molten to ooze copper billet standby；
Step 3, high temperature oozes copper: put into by W skeleton in graphite boat, and the molten copper billet that oozes is placed on W skeleton, around uses just
Beautiful powder landfill, is placed in the high temperature sintering furnace with protective gas atmosphere, after being warming up to 1300-1400 DEG C, is incubated 2-3 hour,
Copper tungsten sintered body after being sintered；
Step 4, hot pressing: be 50-100MPa at pressure by copper tungsten sintered body, temperature is carried out under conditions of being 800-850 DEG C
Evacuation hot pressing, hot pressing time is 40-100min, is cooled to room temperature, i.e. obtains copper tungsten contact material.
Preferably, the particle diameter of described tungsten powder is 4-8 μm.
Preferably, described pulsed direct current is 1200-1800A.
Preferably, protective gas described in step 3 is nitrogen.
Preferably, protective gas atmosphere flow >=0.2m3/ h/h,
Preferably, step 1 is warming up to 1320-1480 DEG C with the heating rate of 100-300 DEG C/min.
Preferably, Cement Composite Treated by Plasma described in step 2 is that argon plasma processes, and processes time 15-20min.
Preferably, scribbling coating on the surface of graphite jig and/or graphite boat, the chemical composition of this coating is high-alumina fly
25-40 weight portion, passivator is 1-3 weight portion, mica powder 4-8 weight portion, graphite 5-10 weight portion, water 1-3 weight portion, bonding
Agent 20-30 weight portion.
Preferably, during wherein passivator is CrO3, KMnO4, K2Cr2O7 any one；Binding agent be soda-lime glass, potash glass or
In three kinds of waterglass of sodium-potash glass any one.
The remarkable result of the present invention is: the present invention is by substituting molding and two rings of presintering by plasma sintering technique
Joint, while improving the arc resistant ablation property of copper tungsten contact material, is substantially reduced production cost, reduces power consumption.Prepare
Copper tungsten contact material ensureing while performance, be not only effectively shortened the production cycle, decrease power consumption, and heat all
Even, programming rate is fast, and sintering temperature is low, and sintering time is short, and production efficiency is high, and product fine microstructures is uniform, can keep raw material
Naturalness, the copper tungsten contact material of high-compactness can be obtained.
As a example by obtaining mixed powder CuW70, CuW90 contact material with the inventive method, the following (table 1: mixed powder of its performance detection
CuW70, CuW90 contact material performance detection table):
Table 1
It addition, the present invention is after the surface configuration coating of graphite jig and graphite boat, owing to this coating can tolerate
The temperature of more than 1500 DEG C, therefore, not only product and graphite jig to sintering serve buffer action, and it is right to also contribute to
The product of graphite jig and sintering plays a protective role.
Detailed description of the invention
Embodiment 1:
Discharge plasma sintering prepares the method for copper tungsten contact material, comprises the following steps:
Step 1, sintering: pour the tungsten powder that particle diameter is 4 μm into graphite jig, mould is placed in hydrogen furnace, to powder
Reduce, light-burned, to come out of the stove, be positioned in plasma sintering stove evacuation and pressurize, described Cement Composite Treated by Plasma is argon
Cement Composite Treated by Plasma, processes time 15min, after pressure reaches 30MPa, is passed through the pulsed direct current of 1200A and with 100
DEG C/heating rate of min is warming up to 1320 DEG C, after insulation 2.5min, furnace cooling obtains W skeleton；
Step 2, copper billet processes: take copper billet, first mechanically polishes, and the copper billet after polishing is in ultrasonic cleaning solution
Carrying out ultrasonic waves for cleaning, supersonic frequency is 35KHz, and temperature is 30 DEG C, after drying, with the continuous or pulse laser that power is 5 watts
Carry out laser with the speed of 10 mm/second and irradiate scanning, be cooled to room temperature, then carry out Cement Composite Treated by Plasma, obtain molten oozing copper billet
Standby；
Step 3, high temperature oozes copper: put into by W skeleton in graphite boat, and the molten copper billet that oozes is placed on W skeleton, around uses just
Beautiful powder landfill, is placed in the high temperature sintering furnace with protective gas atmosphere, and described protective gas is nitrogen, protective gas atmosphere stream
Amount is 0.2m3/ h/h, after being warming up to 1300 DEG C, is incubated 2 hours, the copper tungsten sintered body after being sintered；
Step 4, hot pressing: be 50MPa at pressure by copper tungsten sintered body, temperature carries out evacuation heat under conditions of being 800 DEG C
Pressure, hot pressing time is 40min, is cooled to room temperature, i.e. obtains copper tungsten contact material.
Scribbling coating on the surface of described graphite jig and/or graphite boat, the chemical composition of this coating is high-alumina fly 25 weight
Amount part, passivator is 1 weight portion, mica powder 4 weight portion, graphite 5 weight portion, water 1 weight portion, binding agent 20 weight portion.Wherein
Passivator is CrO3, and binding agent is soda-lime glass.
Embodiment 2:
Step 1, sintering: pour the tungsten powder that particle diameter is 6 μm into graphite jig, mould is placed in hydrogen furnace, to powder
Reduce, light-burned, to come out of the stove, be positioned in plasma sintering stove evacuation and pressurize, described Cement Composite Treated by Plasma is argon
Cement Composite Treated by Plasma, process time 17.5min, after pressure reaches 37.5MPa, be passed through 1500A pulsed direct current and with
The heating rate of 200 DEG C/min is warming up to 1400 DEG C, and after insulation 3.75min, furnace cooling obtains W skeleton；
Step 2, copper billet processes: take copper billet, first mechanically polishes, and the copper billet after polishing is in ultrasonic cleaning solution
Carrying out ultrasonic waves for cleaning, supersonic frequency is 42.5KHz, and temperature is 34 DEG C, after drying, with the continuous or pulse that power is 12.5 watts
Laser carries out laser with the speed of 255 mm/second and irradiates scanning, is cooled to room temperature, then carries out Cement Composite Treated by Plasma, obtains molten oozing
Copper billet is standby；
Step 3, high temperature oozes copper: put into by W skeleton in graphite boat, and the molten copper billet that oozes is placed on W skeleton, around uses just
Beautiful powder landfill, is placed in the high temperature sintering furnace with protective gas atmosphere, and described protective gas is nitrogen, protective gas atmosphere stream
Amount is 0.3m3/ h/h, after being warming up to 1350 DEG C, is incubated 2.5 hours, the copper tungsten sintered body after being sintered；
Step 4, hot pressing: be 75MPa at pressure by copper tungsten sintered body, temperature carries out evacuation heat under conditions of being 825 DEG C
Pressure, hot pressing time is 70min, is cooled to room temperature, i.e. obtains copper tungsten contact material.
Scribbling coating on the surface of described graphite jig and/or graphite boat, the chemical composition of this coating is high-alumina fly 32.5
Weight portion, passivator is 2 weight portions, mica powder 6 weight portion, graphite 7.5 weight portion, water 2 weight portion, binding agent 25 weight portion.
Wherein passivator is KMnO4, and binding agent is potash glass.
Embodiment 3:
Step 1, sintering: pour the tungsten powder that particle diameter is 8 μm into graphite jig, mould is placed in hydrogen furnace, to powder
Reduce, light-burned, to come out of the stove, be positioned in plasma sintering stove evacuation and pressurize, described Cement Composite Treated by Plasma is argon
Cement Composite Treated by Plasma, processes time 20min, after pressure reaches 45MPa, is passed through the pulsed direct current of 1800A and with 300
DEG C/heating rate of min is warming up to 1480 DEG C, after insulation 5min, furnace cooling obtains W skeleton；
Step 2, copper billet processes: take copper billet, first mechanically polishes, and the copper billet after polishing is in ultrasonic cleaning solution
Carrying out ultrasonic waves for cleaning, supersonic frequency is 50KHz, and temperature is 38 DEG C, after drying, with the continuous or pulse laser that power is 20 watts
Carry out laser with the speed of 500 mm/second and irradiate scanning, be cooled to room temperature, then carry out Cement Composite Treated by Plasma, obtain molten oozing copper billet
Standby；
Step 3, high temperature oozes copper: put into by W skeleton in graphite boat, and the molten copper billet that oozes is placed on W skeleton, around uses just
Beautiful powder landfill, is placed in the high temperature sintering furnace with protective gas atmosphere, and described protective gas is nitrogen, protective gas atmosphere stream
Amount is 0.35m3/ h/h, after being warming up to 1400 DEG C, is incubated 3 hours, the copper tungsten sintered body after being sintered；
Step 4, hot pressing: be 100MPa at pressure by copper tungsten sintered body, temperature carries out evacuation heat under conditions of being 850 DEG C
Pressure, hot pressing time is 100min, is cooled to room temperature, i.e. obtains copper tungsten contact material.
Scribbling coating on the surface of described graphite jig and/or graphite boat, the chemical composition of this coating is high-alumina fly 40 weight
Amount part, passivator is 3 weight portions, mica powder 8 weight portion, graphite 10 weight portion, water 3 weight portion, binding agent 30 weight portion.Wherein
Passivator is K2Cr2O7, and binding agent is sodium-potash glass.
The foregoing is only embodiments of the invention, not thereby limit the scope of the claims of the present invention, every utilize this
Equivalent structure or equivalence flow process that bright description is made convert, or are directly or indirectly used in other relevant technology neck
Territory, is the most in like manner included in the scope of patent protection of the present invention.
Claims (7)
1. the method that discharge plasma sintering prepares copper tungsten contact material, it is characterised in that comprise the following steps:
Step 1, sintering: pour tungsten powder into graphite jig, mould is placed in hydrogen furnace, powder is reduced, light-burned, go out
Stove, is positioned in plasma sintering stove evacuation and pressurizes, after pressure reaches 30-45MPa, being passed through pulsed direct current also
Being warming up to 1320-1480 DEG C, after insulation 2.5-5min, furnace cooling obtains W skeleton；
Step 2, copper billet processes: take copper billet, first mechanically polishes, and the copper billet after polishing is carried out in ultrasonic cleaning solution
Ultrasonic waves for cleaning, after drying, carries out laser with the continuous or pulse laser that power is 5-20 watt with the speed of 10-500 mm/second
Irradiate scanning, be cooled to room temperature, then carry out Cement Composite Treated by Plasma, obtain that molten to ooze copper billet standby；
Step 3, high temperature oozes copper: put into by W skeleton in graphite boat, and the molten copper billet that oozes is placed on W skeleton, around uses schmigel
Landfill, is placed in the high temperature sintering furnace with protective gas atmosphere, after being warming up to 1300-1400 DEG C, is incubated 2-3 hour, obtains
Copper tungsten sintered body after sintering；
Step 4, hot pressing: be 50-100MPa at pressure by copper tungsten sintered body, temperature carries out taking out true under conditions of being 800-850 DEG C
Empty hot pressing, hot pressing time is 40-100min, is cooled to room temperature, i.e. obtains copper tungsten contact material.
Discharge plasma sintering the most according to claim 1 prepares the method for copper tungsten contact material, it is characterised in that described
The particle diameter of tungsten powder is 4-8 μm.
Discharge plasma sintering the most according to claim 1 prepares the method for copper tungsten contact material, it is characterised in that described
Pulsed direct current is 1200-1800A.
Discharge plasma sintering the most according to claim 1 prepares the method for copper tungsten contact material, it is characterised in that step
In 3, protective gas is nitrogen.
5. the method preparing copper tungsten contact material according to the discharge plasma sintering described in claim 1 or 3, it is characterised in that
Protective gas atmosphere flow >=0.2m3/h。
Discharge plasma sintering the most according to claim 1 prepares the method for copper tungsten contact material, it is characterised in that step
It is warming up to 1320-1480 DEG C with the heating rate of 100-300 DEG C/min in 1.
Discharge plasma sintering the most according to claim 1 prepares the method for copper tungsten contact material, it is characterised in that step
Cement Composite Treated by Plasma described in 2 is that argon plasma processes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610638086.XA CN106180653B (en) | 2016-08-05 | 2016-08-05 | The method that discharge plasma sintering prepares copper tungsten contact material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610638086.XA CN106180653B (en) | 2016-08-05 | 2016-08-05 | The method that discharge plasma sintering prepares copper tungsten contact material |
Publications (2)
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| CN106735207A (en) * | 2016-12-13 | 2017-05-31 | 合肥工业大学 | A kind of preparation method of high-compactness Cu/CuCr gradient composites |
| CN106978586A (en) * | 2017-04-01 | 2017-07-25 | 西安交通大学 | A kind of overlay coating processing method of arc-chutes copper tungsten electrical contact material |
| CN108262483A (en) * | 2018-03-01 | 2018-07-10 | 合肥工业大学 | A kind of SPS sintering connection methods of tungsten and molybdenum xenogenesis refractory metal |
| CN108950289A (en) * | 2018-07-03 | 2018-12-07 | 中国科学院金属研究所 | A kind of Cu tailings and preparation method thereof with microcosmic oriented structure |
| CN109234597A (en) * | 2018-11-22 | 2019-01-18 | 江苏经纬阀业有限公司 | A kind of tungsten-copper alloy and preparation method thereof |
| CN110724847A (en) * | 2019-12-04 | 2020-01-24 | 河南科技大学 | Method for preparing bicontinuous phase composite material by pressureless infiltration |
| CN111618297A (en) * | 2020-04-21 | 2020-09-04 | 陕西斯瑞新材料股份有限公司 | Preparation method of rapid sintering forming silver-based contact |
| CN111636023A (en) * | 2020-04-23 | 2020-09-08 | 陕西斯瑞新材料股份有限公司 | Preparation method of copper-tungsten gradient material electrical contact |
| CN112658243A (en) * | 2020-11-21 | 2021-04-16 | 陕西斯瑞新材料股份有限公司 | Preparation method of CuW/CuCr integral contact |
| CN112872356A (en) * | 2021-05-06 | 2021-06-01 | 陕西斯瑞新材料股份有限公司 | Method for improving strength of copper-tungsten and copper bonding surface |
| CN113210829A (en) * | 2021-04-28 | 2021-08-06 | 陕西斯瑞新材料股份有限公司 | CuW alloy-Q345D steel integral contact electron beam welding process |
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| CN106978586A (en) * | 2017-04-01 | 2017-07-25 | 西安交通大学 | A kind of overlay coating processing method of arc-chutes copper tungsten electrical contact material |
| CN106978586B (en) * | 2017-04-01 | 2018-12-07 | 西安交通大学 | A kind of overlay coating processing method of arc-chutes copper tungsten electrical contact material |
| CN108262483B (en) * | 2018-03-01 | 2020-06-05 | 合肥工业大学 | SPS sintering connection method for tungsten and molybdenum dissimilar refractory metal |
| CN108262483A (en) * | 2018-03-01 | 2018-07-10 | 合肥工业大学 | A kind of SPS sintering connection methods of tungsten and molybdenum xenogenesis refractory metal |
| CN108950289A (en) * | 2018-07-03 | 2018-12-07 | 中国科学院金属研究所 | A kind of Cu tailings and preparation method thereof with microcosmic oriented structure |
| CN109234597A (en) * | 2018-11-22 | 2019-01-18 | 江苏经纬阀业有限公司 | A kind of tungsten-copper alloy and preparation method thereof |
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| CN110724847B (en) * | 2019-12-04 | 2020-10-20 | 河南科技大学 | Method for preparing bicontinuous phase composite material by pressureless infiltration |
| CN111618297A (en) * | 2020-04-21 | 2020-09-04 | 陕西斯瑞新材料股份有限公司 | Preparation method of rapid sintering forming silver-based contact |
| CN111636023A (en) * | 2020-04-23 | 2020-09-08 | 陕西斯瑞新材料股份有限公司 | Preparation method of copper-tungsten gradient material electrical contact |
| CN112658243A (en) * | 2020-11-21 | 2021-04-16 | 陕西斯瑞新材料股份有限公司 | Preparation method of CuW/CuCr integral contact |
| CN113210829A (en) * | 2021-04-28 | 2021-08-06 | 陕西斯瑞新材料股份有限公司 | CuW alloy-Q345D steel integral contact electron beam welding process |
| CN113210829B (en) * | 2021-04-28 | 2022-06-07 | 陕西斯瑞新材料股份有限公司 | CuW alloy-Q345D steel integral contact electron beam welding process |
| CN112872356A (en) * | 2021-05-06 | 2021-06-01 | 陕西斯瑞新材料股份有限公司 | Method for improving strength of copper-tungsten and copper bonding surface |
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