CN101202170B - Method of preparing sheet silver tin oxide electrical contact material - Google Patents
Method of preparing sheet silver tin oxide electrical contact material Download PDFInfo
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- CN101202170B CN101202170B CN2007101563738A CN200710156373A CN101202170B CN 101202170 B CN101202170 B CN 101202170B CN 2007101563738 A CN2007101563738 A CN 2007101563738A CN 200710156373 A CN200710156373 A CN 200710156373A CN 101202170 B CN101202170 B CN 101202170B
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Abstract
The invention relates to a production method of a material used for a piece-shaped silver tin oxide electric contact, the process flow of which is that the material prepared by silver, tin and additives according to a certain proportion is put into an intermediate frequency smelter for melting; a high pressure water atomizing device is adopted for high pressure alloy atomization; atomized alloy powder is dried and oxidated for modification; an isostatic pressing ingot is formed after isostatic pressing treatment; the ingot is agglomerated in a heating furnace; the agglomerated ingot is delivered into an extruding machine to extrude plates; the extruded plate is rolled and punched for shaping after surface treatment and silver restoring; The material property and electric property of the piece-shaped silver tin oxide electric contact material manufactured by the method can satisfy the use condition with high requirement.
Description
Technical field
The invention belongs to the metal-base composites technical field, refer in particular to a kind of manufacture method that satisfies a kind of sheet silver tin oxide electrical contact material of environment-friendly type electrical contact requirement.
Background technology
The manufacture method of known siller tin oxide electric contact material has following several: the manufacture method of known siller tin oxide electric contact material has following several: (1) also is made up of by 70～97%, 3～22%, 0.1～8% weight content silver, nano tin dioxide and rare earth element.The preparation of the electrical contact of this material comprises the nano tin dioxide preparation of doping zinc-oxide or titanium oxide, the mixing of metal oxide powder and mix the back powder through die mould, sintering, extruding, wire drawing, make rivet or stick contact.(2) earlier silver-colored tin is founded in intermediate frequency furnace after the proportioning by a certain percentage, carry out alloy atomization with hydraulic atomized equipment then, be dried into powder after the atomizing, screening, oxidation furnace is depressed at uniform temperature and oxygen and is carried out oxidation in packing into, is processed into billet by isostatic cool pressing after the oxidation, carries out sintering then, after being squeezed into a material, wire drawing obtains finished product again.(3) silver ingot, Sn, Ni, Zn, Sn, In are placed melting, the extruding slivering down of melting and ingot casting, processing pulverizing, HTHP oxidation, pulverizing again, extrusion forming, high temperature, band, hot pull become wire rod.(4) adopt oxygen rich gas and water under high pressure for the spraying medium,, get Ag+SnO through modified, interior oxidation processes with Ag-Sn-Me melting atomization of liquid powdered
2+ MeO mixed material adopts the powder metallurgy pressing method to mixed material, suppress Ag+SnO
2+ MeO/Ag stratified billet spare makes Ag-SnO through sintering, forge hot processing
2-MeO electric contact material.(5) granularity with 2～12% weight is no more than 150 purpose SnO
2Powder, and the AgSn alloyed powder of the granularity of surplus between 50～1000 orders be raw material, wherein in the AgSn alloyed powder tin content between 1～5% weight; Above-mentioned raw materials powder secluding air ball milling or powerful mixing are prepared SnO
2The composite powder that is evenly distributed; Above-mentioned composite powder reshaped through oxidation in earlier make contact material, perhaps make contact material through oxidation in being shaped again earlier.
The manufacture method of these known siller tin oxide electric contact materials all is to study and invent for the environmental requirement of European Union's two instructions.From the manufacture method of these known siller tin oxide electric contact materials, there is certain difficulty in the materials processing of high oxide weight percent content, and material system is not very perfect, is difficult to satisfy the electric requirement that improves day by day.Wherein there is the pollution of environment in some manufacture method in manufacture process.
Summary of the invention
The objective of the invention is at the deficiency of processability in the manufacture method of known siller tin oxide electric contact material and material system and a kind of novel processing method of developing, the material property of the sheet silver tin oxide electrical contact material of this method manufacturing and electric property can satisfy the service condition of high request.
The present invention is achieved through the following technical solutions:
1) technological process:
With silver, tin, additive in the intermediate frequency (IF) smelting stove, melting after the proportioning by a certain percentage, carry out the high pressure alloy atomization by hydraulic atomized equipment, the atomized alloy powder is dried and the oxidation modifier treatment, formation waits the static pressure ingot blank after waiting static pressure, ingot blank carries out sintering in heating furnace, the sintering ingot blank send the extruder extrusion board, after sheet material is carried out surface treatment and answers silver, is rolled and punch forming;
2) material composition, shared percentage by weight:
Base-material:
Silver ingot, tin slab;
The percentage by weight of silver and tin is: silver-colored 98%-82%, tin 2%-18%;
Additive:
Additive is one or more in the following additive, and the content of additive is 0.1%-5%:T1-bismuth, T2-nickel, T3-indium, T4-zinc, T5-copper, T6-tungsten, T7-molybdenum, the T8-antimony of material system total content;
3) the material system form of the composition:
1. silver+tin;
2. silver+tin+a kind of additive;
3. silver+tin+more than one additives;
4) technical conditions:
1. atomizing pressure: 10MPa-50MPa;
2. oxide isolation: air;
3. oxidization time: 1 hour-20 hours;
4. isostatic compaction pressure: 50MPa-300MPa;
5. the ingot blank sintering temperature is 500 ℃-930 ℃, 2 hours-8 hours time;
6. the ingot blank extrusion temperature is 600 ℃-900 ℃.
Compare advantage and the good effect that is had with known technology of preparing: (1) adopts the silver-colored ashbury metal powder particles degree of hydraulic atomized prepared to control easily, and granule surface activity is big; Particle is very easy to oxidation, need not special oxidation furnaces.(2) material system of science design has improved drawing abillity and electric property.(3) material structure is even, the poor Xi Qu of non-oxidation, and non-oxidation is assembled, and has guaranteed the consistency of material property.(4) the manufacture method raw material of this siller tin oxide electric contact material is prepared simply, and technological process is easy to control, and is with short production cycle, can realize producing in enormous quantities, and production cost is low.(5) environmentally safe in process of production, and the compliance with environmental protection requirements of material own.
Description of drawings
Fig. 1 is a process chart of the present invention.
Embodiment
Embodiment one: the silver (percentage by weight) by 98%, 2% tin (percentage by weight) are raw material, water atomization under the 30MPa pressure condition, in air through 12 hours interior oxidation modifier treatment, hydrostatic pressure at 250MPa depresses to ingot blank, carried out sintering in 780 ℃, 8 hours, and under 750 ℃ temperature conditions, be squeezed into sheet material then, after sheet material carries out the multiple silver of surface treatment, rolling, punch forming are processed into strip-form contacts.
Embodiment two: the silver (percentage by weight) by 90%, 9.7% tin (percentage by weight) are raw material, and add 0.3% bismuth, water atomization under the 39MPa pressure condition, in air,, depress to ingot blank, carried out sintering in 800 ℃, 8 hours at the hydrostatic pressure of 260MPa through 8 hours interior oxidation modifier treatment, under 780 ℃ temperature conditions, be squeezed into sheet material then, after sheet material carried out the multiple silver of surface treatment, rolling, punch forming was processed into strip-form contacts.
Embodiment three: the silver (percentage by weight) by 90%, 9.5% tin (percentage by weight) are raw material, and add 0.3% bismuth, 0.2% zinc, the water atomization under the 35MPa pressure condition, in air through 12 hours interior oxidation modifier treatment, hydrostatic pressure at 250MPa depresses to ingot blank, carried out sintering in 780 ℃, 8 hours, and under 750 ℃ temperature conditions, be squeezed into sheet material then, after sheet material carries out the multiple silver of surface treatment, rolling, punch forming are processed into strip-form contacts.
Embodiment four: the silver (percentage by weight) by 88%, 11% tin (percentage by weight) are raw material, and add 0.2% bismuth, 0.3% antimony, 0.5% indium, water atomization under the 45MPa pressure condition, in air,, depress to ingot blank, carried out sintering in 780 ℃, 8 hours at the hydrostatic pressure of 250MPa through 10 hours interior oxidation modifier treatment, under 820 ℃ temperature conditions, be squeezed into sheet material then, after sheet material carried out the multiple silver of surface treatment, rolling, punch forming was processed into strip-form contacts.
Embodiment five: the silver (percentage by weight) by 82%, 16% tin (percentage by weight) are raw material, and add 0.3% bismuth, 1.7% indium, water atomization under the 50MPa pressure condition, in air through 18 hours interior oxidation modifier treatment, hydrostatic pressure at 250MPa depresses to ingot blank, carried out sintering in 780 ℃, 10 hours, and under 850 ℃ temperature conditions, be squeezed into sheet material then, after sheet material carries out the multiple silver of surface treatment, rolling, punch forming are processed into strip-form contacts.
Claims (6)
1. the manufacture method of a sheet silver tin oxide electrical contact material is characterized in that:
1) technological process:
With silver, tin, additive in the intermediate frequency (IF) smelting stove, melting after the proportioning by a certain percentage, carry out the high pressure alloy atomization by hydraulic atomized equipment, the atomized alloy powder is dried and the oxidation modifier treatment, formation waits the static pressure ingot blank after waiting static pressure, ingot blank carries out sintering in heating furnace, the sintering ingot blank send the extruder extrusion board, after sheet material is carried out surface treatment and answers silver, is rolled and punch forming;
2) material composition, shared percentage by weight:
Base-material:
Silver ingot, tin slab;
The percentage by weight of silver and tin is: silver-colored 98%-82%, tin 2%-18%;
Additive:
Additive is one or more in the following additive, and the content of additive is 0.1%-5%:T1-bismuth, T2-nickel, T3-indium, T4-zinc, T5-copper, T6-tungsten, T7-molybdenum, the T8-antimony of material system total content;
3) the material system form of the composition:
1. silver+tin;
2. silver+tin+a kind of additive;
3. silver+tin+more than one additives;
4) technical conditions:
1. atomizing pressure: 10MPa-50MPa;
2. oxide isolation: air;
3. oxidization time: 1 hour-20 hours;
4. isostatic compaction pressure: 50MPa-300MPa;
5. the ingot blank sintering temperature is 500 ℃-930 ℃, 2 hours-8 hours time;
6. the ingot blank extrusion temperature is 600 ℃-900 ℃.
2. the manufacture method of sheet silver tin oxide electrical contact material according to claim 1, it is characterized in that: the silver by 98%, 2% tin are raw material, water atomization under the 30MPa pressure condition, in air,, depress to ingot blank, carried out sintering in 780 ℃, 8 hours at the hydrostatic pressure of 250MPa through 12 hours interior oxidation modifier treatment, under 750 ℃ temperature conditions, be squeezed into sheet material then, after sheet material carried out the multiple silver of surface treatment, rolling, punch forming was processed into strip-form contacts.
3. the manufacture method of sheet silver tin oxide electrical contact material according to claim 1, it is characterized in that: the silver by 90%, 9.7% tin are raw material, and add 0.3% bismuth, water atomization under the 39MPa pressure condition, in air through 8 hours interior oxidation modifier treatment, hydrostatic pressure at 260MPa depresses to ingot blank, carried out sintering in 800 ℃, 8 hours, under 780 ℃ temperature conditions, be squeezed into sheet material then, after sheet material carries out the multiple silver of surface treatment, rolling, punch forming are processed into strip-form contacts.
4. the manufacture method of sheet silver tin oxide electrical contact material according to claim 1, it is characterized in that: the silver by 90%, 9.5% tin are raw material, and add 0.3% bismuth, 0.2% zinc, water atomization under the 35MPa pressure condition, in air through 12 hours interior oxidation modifier treatment, hydrostatic pressure at 250MPa depresses to ingot blank, carried out sintering in 780 ℃, 8 hours, under 750 ℃ temperature conditions, be squeezed into sheet material then, after sheet material carried out the multiple silver of surface treatment, rolling, punch forming was processed into strip-form contacts.
5. according to the manufacture method of the described sheet silver tin oxide electrical contact material of claim 1, it is characterized in that: the silver by 88%, 11% tin are raw material, and add 0.2% bismuth, 0.3% antimony, 0.5% indium, water atomization under the 45MPa pressure condition, in air through 10 hours interior oxidation modifier treatment, hydrostatic pressure at 250MPa depresses to ingot blank, carried out sintering in 780 ℃, 8 hours, and under 820 ℃ temperature conditions, be squeezed into sheet material then, after sheet material carries out the multiple silver of surface treatment, rolling, punch forming are processed into strip-form contacts.
6. according to the manufacture method of the described sheet silver tin oxide electrical contact material of claim 1, it is characterized in that: the silver by 82%, 16% tin are raw material, and add 0.3% bismuth, 1.7% indium, water atomization under the 50MPa pressure condition, in air through 18 hours interior oxidation modifier treatment, hydrostatic pressure at 250MPa depresses to ingot blank, carried out sintering in 780 ℃, 10 hours, under 850 ℃ temperature conditions, be squeezed into sheet material then, after sheet material carried out the multiple silver of surface treatment, rolling, punch forming was processed into strip-form contacts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101563738A CN101202170B (en) | 2007-10-23 | 2007-10-23 | Method of preparing sheet silver tin oxide electrical contact material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101563738A CN101202170B (en) | 2007-10-23 | 2007-10-23 | Method of preparing sheet silver tin oxide electrical contact material |
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| CN101202170A CN101202170A (en) | 2008-06-18 |
| CN101202170B true CN101202170B (en) | 2011-06-08 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101609755B (en) * | 2009-07-08 | 2012-07-25 | 中南大学 | Preparation method of silver-metallic oxide electrical contact material |
| CN102931001B (en) * | 2012-11-07 | 2015-09-23 | 福达合金材料股份有限公司 | A kind of contact material of silver-colored nickel oxide iron oxide and preparation method |
| CN102925738B (en) * | 2012-11-07 | 2015-01-07 | 福达合金材料股份有限公司 | Method for preparing silver tin oxide material |
| CN103643074B (en) * | 2013-12-06 | 2015-12-09 | 桂林电器科学研究院有限公司 | A kind of preparation method of flaky AgSnO2 contact |
| CN103934462A (en) * | 2014-05-22 | 2014-07-23 | 云南锡业股份有限公司 | Method for preparing special tin raw material for methyl tin mercaptide |
| CN104269296B (en) * | 2014-09-05 | 2017-01-25 | 重庆川仪自动化股份有限公司 | Preparation method of silver tin oxide electric contact material |
| CN111468719B (en) * | 2020-03-07 | 2022-03-25 | 浙江福达合金材料科技有限公司 | Silver tin oxide sheet-shaped electrical contact and preparation method thereof |
| CN115386757A (en) * | 2022-07-07 | 2022-11-25 | 靖江市海源有色金属材料有限公司 | Method for manufacturing silver tin oxide contact material |
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Effective date of registration: 20220130 Address after: 325025 No. 308, Binhai fifth road, Wenzhou Economic and Technological Development Zone, Wenzhou City, Zhejiang Province Patentee after: Zhejiang Fuda alloy material technology Co.,Ltd. Address before: No. 518, Binhai 4th Road, Binhai Park, Wenzhou Economic and Technological Development Zone, Zhejiang Province, 325000 Patentee before: FUDA ALLOY MATERIALS Co.,Ltd. |
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