CN101656160A - Preparing method of silver-base metal acid-salt electrical-contact composite material - Google Patents
Preparing method of silver-base metal acid-salt electrical-contact composite material Download PDFInfo
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- CN101656160A CN101656160A CN200910094954A CN200910094954A CN101656160A CN 101656160 A CN101656160 A CN 101656160A CN 200910094954 A CN200910094954 A CN 200910094954A CN 200910094954 A CN200910094954 A CN 200910094954A CN 101656160 A CN101656160 A CN 101656160A
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- 239000002131 composite material Substances 0.000 title claims abstract description 22
- 239000010953 base metal Substances 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 51
- 239000000843 powder Substances 0.000 claims abstract description 45
- 229910052751 metal Inorganic materials 0.000 claims abstract description 33
- 239000002184 metal Substances 0.000 claims abstract description 33
- 235000015895 biscuits Nutrition 0.000 claims abstract description 24
- 238000005245 sintering Methods 0.000 claims abstract description 21
- 229910052802 copper Inorganic materials 0.000 claims abstract description 9
- 239000010949 copper Substances 0.000 claims abstract description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000005516 engineering process Methods 0.000 claims abstract description 7
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000011812 mixed powder Substances 0.000 claims abstract description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 39
- 229910052709 silver Inorganic materials 0.000 claims description 27
- 239000004332 silver Substances 0.000 claims description 27
- 239000002253 acid Substances 0.000 claims description 16
- 238000002360 preparation method Methods 0.000 claims description 14
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 8
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 7
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 7
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 7
- 238000004080 punching Methods 0.000 claims description 7
- 230000000754 repressing effect Effects 0.000 claims description 7
- 239000011159 matrix material Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 239000010930 yellow gold Substances 0.000 claims description 6
- 229910001097 yellow gold Inorganic materials 0.000 claims description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims description 5
- 239000011733 molybdenum Substances 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 229910052721 tungsten Inorganic materials 0.000 claims description 5
- 239000010937 tungsten Substances 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 4
- 238000005056 compaction Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 235000012054 meals Nutrition 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 238000009692 water atomization Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 abstract description 9
- 238000002156 mixing Methods 0.000 abstract description 3
- 238000003723 Smelting Methods 0.000 abstract description 2
- 239000010944 silver (metal) Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000000956 alloy Substances 0.000 description 5
- 230000010355 oscillation Effects 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 4
- 238000010622 cold drawing Methods 0.000 description 4
- 229910044991 metal oxide Inorganic materials 0.000 description 4
- 150000004706 metal oxides Chemical class 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 4
- 229910052793 cadmium Inorganic materials 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910001923 silver oxide Inorganic materials 0.000 description 2
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910001887 tin oxide Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910017937 Ag-Ni Inorganic materials 0.000 description 1
- 229910017750 AgSn Inorganic materials 0.000 description 1
- 229910017944 Ag—Cu Inorganic materials 0.000 description 1
- 229910017984 Ag—Ni Inorganic materials 0.000 description 1
- 238000012356 Product development Methods 0.000 description 1
- 229910002835 Pt–Ir Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 229960004643 cupric oxide Drugs 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000010946 fine silver Substances 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000011156 metal matrix composite Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 238000001132 ultrasonic dispersion Methods 0.000 description 1
- 238000007704 wet chemistry method Methods 0.000 description 1
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Abstract
The invention relates to an electrical-contact composite material, in particular to a preparing method of a silver-base metal acid-salt electrical-contact composite material, which belongs to the technical field of material smelting. The method comprises the following steps: mixing silver-base powder of which the granularity is lower than 20 micrometer and metal acid-salt powder in a powder mixerto lead the tin or copper element content to be 6 to 15 percent of the total weight, uniformly mixing the silver-base powder and the metal acid-salt powder by ultrasonic waves of which the frequency is from 10 to 30 KHz, and compressing the mixed powder into biscuits; sintering the biscuits at a temperature from 500 to 800 DEG C into ingot billets, and recompressing and resintering the ingot billets at a temperature from 500 to 800 DEG C; and sending the recompressed and resintered billets into an extruder to directly extrude out wire rods, and processing the wire rods into finished products.The method has simple technology and excellent processing performance, better solves the problem of the temperature rise of the electrical-contact material, improves the integrated performance of thematerial, and overcomes the problem in the processing and the use of the electrical-contact material in prior.
Description
Technical field
The present invention relates to the preparation method of a kind of electric contact composite material, particularly silver-base metal acid-salt electrical-contact composite material, belong to material smelting tech field.
Background technology
Electrical contact is one of key element of electric equipment, and its function is to connect and cut off electric current.It is a carrying object, be again component of machine, must have favorable conductive thermal conductivity and anti-electrical arc erosion, anti-melting welding, little electrical wear, low and stable contact resistance, not play chemical change, certain intensity is arranged and be easy to characteristics such as machining with working medium.Known contact material has nearly 100 years developing history, initial proof gold, fine silver, the pure platinum of using is made contactor material, begin the forties to adopt alloys such as Ag-Cu, Au-Ag, Pt-Ir, Pt-Ag, developed polynary noble metal and various noble metal composite-material since the sixties.Because electric conductivity that Ag and alloy thereof are good and good processability and price are lower, make silver-based electric contact material be widely used under the various power condition and work, and be used in a large number in big, the load electrical equipment.As various switches, relay, contactor etc.The contact material of known formation industrialization and practical application can reduce the serial contact material of four series: Ag-MeO (silver and metal oxide), Ag-C series contact material, Ag-WC series contact material, Ag-Ni series contact material.At present most widely used in several contact materials is Ag-MeO series, and known Ag-MeO series electrical contact material mainly contains AgCdO, AgSnO
2, AgZnO, AgSiO
2, silver-colored rare earth oxide (AgREO) etc.The characteristics of AgCdO contact material are: good, the anti-melting welding ability of anti-deterioration is strong, contact resistance is low and stable, has good serviceability, the electric current of using is pacified to several kilo-amperes from tens, is widely used in lying prostrate last kilovolt the multiple low-voltage electrical apparatus from several, once is called as " omnipotent contact ".And in AgCdO, rely on the volatilization and the O of Cd steam
2Overflow and cool off basis material and extinguish arcs, the decomposition temperature of CdO is lower than the fusing point of Ag, and CdO just can distil under lower temperature; The existence of CdO has improved the viscosity of melt surface thing simultaneously, can prevent that silver from being blown off by electric arc.But because cadmium metal steam is poisonous, contaminated environment, harmful, recent two decades comes, and many countries have all launched the research for cadmium material, have made significant headway.
Japan is from the research that proposed to actively develop after restriction uses the AgCdO contact " few cadmium, for cadmium " contact material in 1972, succeed in developing and produce in a large number the AgSn alloy add one or more elements such as Bi, Mn, Cu carry out in the Ag-SnO of oxidation
2Contact material.The contact of manufacturing has characteristics such as anti-deterioration is good, contact resistance is low.Simultaneously, the U.S., Russia, France, Korea S etc. also actively develop the development and the product development work of Ag-MeO contact material.Mainly there is following problem in known this type of contact material: poor as material plasticity, be difficult to processing, and though performance promotes when especially using the nano-oxide reinforcing material, difficulty of processing is big, the product lumber recovery is low; Oxide is common Heat stability is good except that CdO, and high temperature is difficult for decomposing, and can make the material temperature rise, and oxide does not have the arc extinguishing effect and makes electrical contact performance than Agcdo difference; Known interpolation oxide differs greatly etc. with the wetability of silver; These problems make several Ag-MeO contact materials have defective aspect processability and the serviceability always, especially the AgSnO of powder metallurgy preparation
2Material is widely used and various electrical equipment, occurs surperficial silver metal in the use and splashes and cause only remaining more granules of stannic oxide, thereby make contact performance descend so that contact lost efficacy.
Summary of the invention
Technical problem to be solved by this invention provides a kind of preparation method of silver-base metal acid-salt electrical-contact composite material, alternative poisonous Agcdo contact material, technology is simple, processing characteristics is good, preferably resolve the problem of temperature rise of contact material, the combination property of material is improved, the problem that has overcome present contact material processing and used.
Solving the scheme that technical problem of the present invention adopts is: the silver matrix powder of granularity less than 20 microns mixed in mixed powder machine with the metal acid-salt powder, make tin or copper account for 6～15% of total weight, be that the ultrasonic wave of 10～30KHz mixes with frequency again, be pressed into biscuit; Biscuit carries out sintering, 500～800 ℃ of temperature, and the sintering ingot blank is again through repressing and re-sintering, 500～800 ℃ of resintering temperature; The repressing and re-sintering base send extruder directly to extrude the line bar, and the line bar is processed, and makes finished product.
This method control process conditions make metal acid-salt be evenly distributed in the composite material, the metal acid-salt particle is owing to containing the weakened chemical bond of single oxide of metal ion, increased the metallic bond between metal and metallic atom, make to combine better with the formed interface of silver matrix, and owing to metal acid-salt has kept good processability than oxide particle is soft usually; The novel contact material that obtains can decompose in high-temperature electric arc effect lower part, reduce the serviceability temperature of contact material and play certain arc extinguishing effect, can form simultaneously corresponding nanosize metal oxide and keep the characteristic of contact material in the past, prevented that not only silver metal from being dispelled by electric arc, and improved contact strength, preferably resolve the problem of temperature rise of contact material and the combination property of material is improved.The electric contact composite material technology of the present invention's preparation is simple, and cost is lower, the problem that has overcome present contact material processing to a certain extent and used, and the scope of application obtains increasing, and prolonged useful life.
Technical scheme of the present invention also comprises:
Described silver matrix powder adopts any of silver powder, silver-colored ashbury metal powder or yellow gold powder; The metal acid-salt powder adopts stannic acid silver, stannic acid copper, metatitanic acid silver, zirconic acid silver, one or more in the silver-bearing copper oxygen compound; In mixed material, also added granularity less than one or both of 45 microns adjustment elemental tungsten, molybdenum.
During ultrasonic wave mixed material powder, the power of ultrasonic unit can be regulated between 1～5 kilowatt, vibration powder 5～60 minutes; Yin Xi or yellow gold powder system obtain by melting, the water atomization flouring technology of silver-colored ashbury metal.
When biscuit is shaped, adopt the two-way 400～800MPa that is compressed to of punching block, the employing cold isostatic compaction is 200～350MPa; Biscuit sintering time 4～16 hours; The multiple pressure pressure 300～600MPa of sintering ingot blank, 4～12 hours sintering ingot blank resintering time, 400～650 ℃ of repressing and re-sintering base extrusion temperatures.
The tungsten that adds in the raw meal is below 2% of total weight, and molybdenum is below 1.5% of total weight;
The concrete composition of raw materials of silver-base metal acid-salt electrical-contact composite material of the present invention is: 1. one or both in one or more of silver powder+metal acid-salt powder+interpolation element; 2. one or both in one or more of silver-colored ashbury metal powder or yellow gold powder+metal acid-salt powder+interpolation element.
One, material composition, granularity and shared percentage by weight thereof
1, raw material:
Silver powder is (commercially available, purity is greater than 99.9%) or (the commercially available or self-control of silver-colored tin (copper) alloy powder, purity is greater than 99.9%), and the metal acid-salt powder (commercially available or wet chemistry method self-control, purity is greater than 99.9%, comprise: stannic acid silver, stannic acid copper, metatitanic acid silver, zirconic acid silver, silver-bearing copper oxygen compounds etc.), particle size is less than 20 microns.Tin or copper account for 6～15% of total weight, and surplus is other element in silver and the metal acid-salt;
2, the performance of adding is adjusted element:
1. tungsten (W): be no more than 2% of total weight, granularity is less than 45 microns;
2. molybdenum (Mo): be no more than 1% of total weight; Granularity is less than 45 microns;
Two, technical conditions
1. mix vermicelli spare
The powder that screening is good is put into and is mixed the mixing of powder machine, and adopts high-power ultrasonic to carry out homogenizing, and the power of ultrasonic unit can be regulated between 1～5 kilowatt, and frequency is 10～30KHz, supersonic oscillations powder 5～60 minutes;
2. biscuit forming pressure
The two-way compacting of punching block: 400～800MPa;
Or:
Cold isostatic compaction: 200～350MPa;
3. the biscuit sintering temperature is 500～800 ℃, and 4～16 hours time, accurate temperature controlling decomposes in the Composite Preparation stage to prevent metal acid-salt;
4. the sintering ingot blank is answered pressure pressure 300～600MPa;
5. sintering ingot blank resintering temperature is 500～800 ℃, and 4～12 hours time, accurate temperature controlling decomposes in the Composite Preparation stage to prevent metal acid-salt;
6. repressing and re-sintering base extrusion temperature is 400～650 ℃.
The invention has the beneficial effects as follows:
Mix the powder process and adopt the high-power ultrasonic dispersion method, it is more even to make that silver powder and additive disperse, and part wild phase particle can be according to production and performance requirement and original position generates, thereby sponging the unstable metal acid-salt of part decomposes the oxygen that discharges; Contain metallic bond in the metal acid-salt, reduced that covalent bond combines with the formed interface of silver matrix and the plasticity variation that causes, good interface is in conjunction with the combination property of material is greatly improved;
Because the mechanical properties such as modulus of elasticity of the metal acid-salt that adds are lower, the structure of part metals hydrochlorate also is layer structure, the hardness height of oxides such as tin oxide is far from, so can not make the tangible work hardening of material production, drawing abillity more approaches alloy material and non-metal-matrix composite, and forming materials and properties for follow are good, product lumber recovery height, can make different shape easily, solve the problem of silver oxide contact material following process difficulty;
The wild phase that adds is a metal acid-salt, can under arcing, decompose, absorb certain heat and reduce the temperature of contact material, play certain arc extinguishing effect, and metal acid-salt decomposes the back and forms metal oxide (as tin oxide, cupric oxide etc.), can also reach the effect and the effect of siluer metal oxide composite material in the past, make the life-span that electrically contacts of contact material improve greatly, enlarged the scope of application of such material.
The addition manner of metal acid-salt and interpolation content can change according to technological requirement easily, can adjust the mechanical property and the electrical conductance matter of composite material by adding its content, improve the whole processing performance of composite material and make the effect performance of additive reach optimum efficiency.
That raw material is prepared is simple, can add metal acid-salt easily under the condition of original production technology, technological process is controlled easily, with short production cycle, product cost is low, the life-span is long; And can realize producing production process environmentally safe or of low pollution in enormous quantities.
Description of drawings
Fig. 1 is a process chart of the present invention.
Embodiment
Embodiment one
Stannic acid silver (Ag by 12%
2SnO
3) powder (percentage by weight), 87% silver powder (percentage by weight), 1% tungsten powder (percentage by weight) is inserted powder in the batch mixer and to be mixed; With power is 1KW, and frequency is the supersonic oscillations powder 10 minutes of 20KHz, makes its homogenizing.Two-way press forming becomes biscuit in punching block, and the biscuit forming pressure is 600MPa; Biscuit is through being sintered into ingot blank in 750 ℃, 4 hours; Ingot blank is pressed again with the pressure of 500MPa, and 700 ℃, 10 hours resinterings are squeezed into the line bar then under 500 ℃ temperature conditions, and last cold drawing becomes line (silk) material.
Embodiment two
Silver-bearing copper oxygen compound (Ag by 15%
2CuO
3And AgCuO
2) powder (percentage by weight), 80% silver powder (percentage by weight), 4.5% silver-colored ashbury metal powder (percentage by weight), 0.5% molybdenum powder (percentage by weight) is inserted powder in the batch mixer and to be mixed; With power is 3KW, and frequency is the supersonic oscillations powder 30 minutes of 25KHz, makes its homogenizing.Two-way press forming becomes biscuit in punching block, and the biscuit forming pressure is 650MPa; Biscuit is through being sintered into ingot blank in 750 ℃, 4 hours; Ingot blank is pressed again with the pressure of 600MPa, and 700 ℃, 8 hours resinterings are squeezed into the line bar then under 550 ℃ temperature conditions, and last cold drawing becomes line (silk) material.
Embodiment three
Stannic acid copper (CuSnO by 15%
3) powder (percentage by weight), 84% silver powder (percentage by weight), 0.5% tungsten powder (percentage by weight), 0.5% molybdenum powder (percentage by weight) is inserted powder in the batch mixer and to be mixed; With power is 1KW, and frequency is the supersonic oscillations powder 25 minutes of 20KHz, makes its homogenizing.Two-way press forming becomes biscuit in punching block, and the biscuit forming pressure is 600MPa; Biscuit is through being sintered into ingot blank in 700 ℃, 4 hours; Ingot blank is pressed again with the pressure of 600MPa, and 650 ℃, 8 hours resinterings are squeezed into the line bar then under 500 ℃ temperature conditions, and last cold drawing becomes line (silk) material.
Embodiment four
Stannic acid silver (Ag by 6%
2SnO
3) powder (percentage by weight), 5% metatitanic acid silver (Ag
2TiO
3) powder (percentage by weight), 88% silver powder (percentage by weight), 1% tungsten powder (percentage by weight) is inserted powder in the batch mixer and to be mixed; With power is 2KW, and frequency is the supersonic oscillations powder 20 minutes of 10KHz, makes its homogenizing.Two-way press forming becomes biscuit in punching block, and the biscuit forming pressure is 650MPa; Biscuit is through being sintered into ingot blank in 700 ℃, 6 hours; Ingot blank is pressed again with the pressure of 500MPa, and 700 ℃, 7 hours resinterings are squeezed into the line bar then under 500 ℃ temperature conditions, and last cold drawing becomes line (silk) material.
Claims (7)
1, the preparation method of silver-base metal acid-salt electrical-contact composite material, it is characterized in that: the silver matrix powder of granularity less than 20 microns mixed in mixed powder machine with the metal acid-salt powder, make tin or copper account for 6～15% of total weight, be that the ultrasonic wave of 10～30KHz mixes with frequency again, be pressed into biscuit; Biscuit carries out sintering, 500～800 ℃ of temperature, and the sintering ingot blank is again through repressing and re-sintering, 500～800 ℃ of resintering temperature; The repressing and re-sintering base send extruder directly to extrude the line bar, and the line bar is processed, and makes finished product.
2, the preparation method of silver-base metal acid-salt electrical-contact composite material according to claim 1 is characterized in that: the silver matrix powder adopts any of silver powder, silver-colored ashbury metal powder or yellow gold powder; The metal acid-salt powder adopts stannic acid silver, stannic acid copper, metatitanic acid silver, zirconic acid silver, one or more in the silver-bearing copper oxygen compound; In mixed material, also added granularity less than one or both of 45 microns adjustment elemental tungsten, molybdenum.
3, the preparation method of silver-base metal acid-salt electrical-contact composite material according to claim 2 is characterized in that: during ultrasonic wave mixed material powder, the power of ultrasonic unit can be regulated between 1～5 kilowatt, vibration powder 5～60 minutes; Yin Xi or yellow gold powder system obtain by melting, the water atomization flouring technology of silver-colored ashbury metal.
4, the preparation method of silver-base metal acid-salt electrical-contact composite material according to claim 2 is characterized in that: when biscuit is shaped, adopt the two-way 400～800MPa that is compressed to of punching block, the employing cold isostatic compaction is 200～350MPa; Biscuit sintering time 4～16 hours; The multiple pressure pressure 300～600MPa of sintering ingot blank, 4～12 hours sintering ingot blank resintering time, 400～650 ℃ of repressing and re-sintering base extrusion temperatures.
5, the preparation method of silver-base metal acid-salt electrical-contact composite material according to claim 2 is characterized in that: the tungsten that adds in the raw meal is below 2% of total weight, and molybdenum is below 1.5% of total weight.
6, according to the preparation method of claim 3,4 or 5 described silver-base metal acid-salt electrical-contact composite materials, it is characterized in that concrete composition of raw materials is: one or both in one or more of silver powder+metal acid-salt powder+interpolation element).
7, according to the preparation method of claim 3,4 or 5 described silver-base metal acid-salt electrical-contact composite materials, it is characterized in that concrete composition of raw materials is: one or both in one or more of silver-colored ashbury metal powder or yellow gold powder+metal acid-salt powder+interpolation element.
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| CN101241804B (en) * | 2007-11-23 | 2010-04-21 | 中南大学 | A silver-ZnO electric contact and its making method |
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| CN102407574A (en) * | 2011-09-23 | 2012-04-11 | 鹤山东力电子科技有限公司 | Production process of copper clad laminate heat-conductive adhesive |
| CN105234389A (en) * | 2015-10-09 | 2016-01-13 | 西安思源学院 | Method for preparing titanium-zirconium-molybdenum (TZM) alloy by mixing superfine powder through ultrasonic waves |
| CN108103339A (en) * | 2017-12-18 | 2018-06-01 | 浙江工业大学 | A kind of preparation method of silver-based barium titanate composited contact material |
| CN108493024A (en) * | 2018-05-22 | 2018-09-04 | 东北大学 | A kind of silver-tin electrical contact material and preparation method thereof |
| CN109317661A (en) * | 2018-10-23 | 2019-02-12 | 华南理工大学 | A kind of TiN/Al sill composite powder and its laser 3D printing manufacturing process |
| CN109317661B (en) * | 2018-10-23 | 2021-07-16 | 华南理工大学 | TiN/Al-based material composite powder and laser 3D printing forming method thereof |
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