CN104498764A - Electric contact material and preparation method thereof - Google Patents
Electric contact material and preparation method thereof Download PDFInfo
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- CN104498764A CN104498764A CN201410845920.3A CN201410845920A CN104498764A CN 104498764 A CN104498764 A CN 104498764A CN 201410845920 A CN201410845920 A CN 201410845920A CN 104498764 A CN104498764 A CN 104498764A
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Abstract
The invention discloses an electric contact material, comprising the following substances in percentage by weight: 85%-92% of Ag, 7%-14% of SnO2, 1%-2% of CuO and 0.05%-0.15% of an additive. The electric contact material is convenient to process; environment pollution caused by cadmium or cadmium salts is reduced; the melting-welding resistance is improved; noble metal is saved; and the electric contact material has social benefits and economic benefits.
Description
Technical field
The present invention relates to contact material field, relate in particular to a kind of contact material and preparation method.
Background technology
Contact material is the contact member of electric switch, instrument etc., mainly bears the effect of on-off circuit and load current.Its performance quality directly affects performance and the quality of device for switching.
Though the Agcdo electrical contact of current use has fabulous performance and lower production cost, manufacturing process is also very mature and stable, but cadmium and cadmium salt harmful, and unfavorable to environment, trend in the future reduces or stop using the contact material containing cadmium or cadmium salt.
Silver-tin oxide or indium oxide is another contact material, although there is the history of two more than ten years, but because it is containing noble metal indium and process for processing characteristic difference and poor reprocessing characteristic, thus be mainly used in simple shape and do not need in the environment for use of reprocessing, then seem helpless for what need complex deformation as bi-metal rivet, and the wettability of silver and stannic oxide is poor, in use resistance fusion welding is poor.
The reason of siller tin oxide poor processability is granules of stannic oxide poor toughness, the inaccurate coordination when material deformation, and silver is poor with the wettability of stannic oxide, and in use resistance fusion welding is poor.
Summary of the invention
The object of this invention is to provide a kind of easy to process, can environmental pollution be reduced, improve resistance fusion welding, save contact material and the preparation method of precious metal.
The present invention is achieved in that a kind of contact material, it is characterized in that: the weight percent of each material is: the additive of Ag content 85 ~ 92%, SnO2 content 7 ~ 14%, CuO content 1 ~ 2%, 0.05 ~ 0.15%.
Mentioned in the present invention of additives for yttrium, bismuth, lithium in at least one.
Novel electrical contact material of the present invention is: siller tin oxide cupric oxide, and molecular formula is: AgSnO2CuO.
SnO2 content 8 ~ 11%, CuO content 1 ~ 1.4% of the present invention.
SnO2 content 10 ~ 13%, CuO content 1.5 ~ 1.9% of the present invention.
The present invention includes following steps: 1) melting: be placed in smelting furnace by silver ingot, copper ingot, tin slab and additive by weight percentage, smelting temperature controls at 1120 ~ 1250 DEG C; 2) powder by atomization: use water atomization process to make granularity at 50 ~ 150 object powder; 3) sorting; 4) internal oxidition: in special internal oxidition stove, internal oxidition is carried out to above-mentioned powder, oxidizing temperature is at 650 DEG C ~ 780 DEG C, and the time, between 2 ~ 16 hours, tests to the powder after internal oxidition, confirms that internal oxidition is qualified; 5) shaping: the powder after internal oxidition is placed on extrusion forming in punching block, pressure is between 200 ~ 300MPA, and time controling was at 5 to 30 minutes, and the billet reheat after shaping, to 880 ~ 950 DEG C, is incubated 2 ~ 5 hours; 6) hot extrusion: hot extrusion is carried out to above-mentioned blank, extrusion ratio is between 80 ~ 220, and extrusion temperature is between 730 ~ 780 DEG C; 7) repeatedly to anneal drawing; 8) wire rod is made; 9) rivet is made.
The present invention is easy to process, decreases cadmium or cadmium salt to the pollution of environment, improves resistance fusion welding, saved precious metal, had Social benefit and economic benefit.
Embodiment
A kind of contact material, is characterized in that: the weight percent of each material is: the additive of Ag content 85 ~ 92%, SnO2 content 7 ~ 14%, CuO content 1 ~ 2%, 0.05 ~ 0.15%.Mentioned additives for yttrium, bismuth, lithium in at least one.Described Novel electrical contact material is: siller tin oxide cupric oxide, and molecular formula is: AgSnO2CuO.Described SnO2 content 8 ~ 11%, CuO content 1 ~ 1.4%.Described SnO2 content 10 ~ 13%, CuO content 1.5 ~ 1.9%.A preparation technology for Novel electrical contact material, comprises the following steps: 1) melting: be placed in smelting furnace by silver ingot, copper ingot, tin slab and additive by weight percentage, and smelting temperature controls at 1120 ~ 1250 DEG C; 2) powder by atomization: use water atomization process to make granularity at 50 ~ 150 object powder; 3) sorting; 4) internal oxidition: in special internal oxidition stove, internal oxidition is carried out to above-mentioned powder, oxidizing temperature is at 650 DEG C ~ 780 DEG C, and the time, between 2 ~ 16 hours, tests to the powder after internal oxidition, confirms that internal oxidition is qualified; 5) shaping: the powder after internal oxidition is placed on extrusion forming in punching block, pressure is between 200 ~ 300MPA, and time controling was at 5 to 30 minutes, and the billet reheat after shaping, to 880 ~ 950 DEG C, is incubated 2 ~ 5 hours; 6) hot extrusion: hot extrusion is carried out to above-mentioned blank, extrusion ratio is between 80 ~ 220, and extrusion temperature is between 730 ~ 780 DEG C; 7) repeatedly to anneal drawing; 8) wire rod is made; 9) rivet is made.
During concrete enforcement, in order to overcome the above-mentioned weakness of silver tin oxide material, plan is taked to set about from production technique and component two aspects adding trace element improvement silver and stannic oxide wettability; Specific as follows: to improve its processing characteristics by the means of production taking powdered alloy preoxidation to add powder metallurgical technique; Meanwhile add the minor component such as cupric oxide, bismuth oxide to improve the wettability of silver and stannic oxide.The electrical contact that the electric switch such as various rly.s, contactor that the present invention can meet the various current class of low voltage uses, makes it have good process for processing feature and reprocesses weakness and the saving precious metal that characteristic (adapting to bimetal composite rivet electrical contact) overcomes its resistance fusion welding difference simultaneously preferably.
Embodiment is the Ag SnO2CuO of different content, processes by previous process, and resulting materials performance is as following table:
Claims (6)
1. a contact material, is characterized in that: the weight percent of each material is: the additive of Ag content 85 ~ 92%, SnO2 content 7 ~ 14%, CuO content 1 ~ 2%, 0.05 ~ 0.15%.
2. According to claim 1 a kind of electric contact material, whose character is: the mentioned additives for yttrium, bismuth, lithium in at least one.
3. a kind of contact material according to claim 1 and 2, is characterized in that: described Novel electrical contact material is: siller tin oxide cupric oxide, and molecular formula is: AgSnO2CuO.
4. a kind of contact material according to claim 1, is characterized in that: described SnO2 content 8 ~ 11%, CuO content 1 ~ 1.4%.
5. a kind of contact material according to claim 1, is characterized in that: described SnO2 content 10 ~ 13%, CuO content 1.5 ~ 1.9%.
6. a preparation method for contact material, is characterized in that: comprise the following steps: 1) melting: be placed in smelting furnace by silver ingot, copper ingot, tin slab and additive by weight percentage, and smelting temperature controls at 1120 ~ 1250 DEG C; 2) powder by atomization: use water atomization process to make granularity at 50 ~ 150 object powder; 3) sorting; 4) internal oxidition: in special internal oxidition stove, internal oxidition is carried out to above-mentioned powder, oxidizing temperature is at 650 DEG C ~ 780 DEG C, and the time, between 2 ~ 16 hours, tests to the powder after internal oxidition, confirms that internal oxidition is qualified; 5) shaping: the powder after internal oxidition is placed on extrusion forming in punching block, pressure is between 200 ~ 300MPA, and time controling was at 5 to 30 minutes, and the billet reheat after shaping, to 880 ~ 950 DEG C, is incubated 2 ~ 5 hours; 6) hot extrusion: hot extrusion is carried out to above-mentioned blank, extrusion ratio is between 80 ~ 220, and extrusion temperature is between 730 ~ 780 DEG C; 7) repeatedly to anneal drawing; 8) wire rod is made; 9) rivet is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410845920.3A CN104498764A (en) | 2014-12-31 | 2014-12-31 | Electric contact material and preparation method thereof |
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| CN201410845920.3A CN104498764A (en) | 2014-12-31 | 2014-12-31 | Electric contact material and preparation method thereof |
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| CN104498764A true CN104498764A (en) | 2015-04-08 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105513864A (en) * | 2015-12-10 | 2016-04-20 | 宋和明 | Electrical switch contact material and preparation method |
| CN105702503A (en) * | 2016-04-11 | 2016-06-22 | 福达合金材料股份有限公司 | Preparation method for silver tin oxide indium oxide contact material |
| CN105810461A (en) * | 2016-04-16 | 2016-07-27 | 苏州思创源博电子科技有限公司 | Preparation method of copper-based electrical contact material |
| CN106086495A (en) * | 2016-06-17 | 2016-11-09 | 石家庄铁道大学 | Cupric oxide doped siller tin oxide composite and preparation method thereof |
| CN106868333A (en) * | 2015-12-11 | 2017-06-20 | 靖江市海源新材料科技有限公司 | A kind of new electrical contact material |
| CN107881360A (en) * | 2017-10-31 | 2018-04-06 | 靖江市海源有色金属材料有限公司 | Silver copper oxide stannic oxide materials and its manufacture method |
| EP3799977A1 (en) | 2019-10-01 | 2021-04-07 | ABB Schweiz AG | Method for manufacturing an ag-based electrical contact material, an electrical contact material and an electrical contact obtained therewith |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105513864A (en) * | 2015-12-10 | 2016-04-20 | 宋和明 | Electrical switch contact material and preparation method |
| CN106868333A (en) * | 2015-12-11 | 2017-06-20 | 靖江市海源新材料科技有限公司 | A kind of new electrical contact material |
| CN105702503A (en) * | 2016-04-11 | 2016-06-22 | 福达合金材料股份有限公司 | Preparation method for silver tin oxide indium oxide contact material |
| CN105810461A (en) * | 2016-04-16 | 2016-07-27 | 苏州思创源博电子科技有限公司 | Preparation method of copper-based electrical contact material |
| CN106086495A (en) * | 2016-06-17 | 2016-11-09 | 石家庄铁道大学 | Cupric oxide doped siller tin oxide composite and preparation method thereof |
| CN106086495B (en) * | 2016-06-17 | 2017-07-11 | 石家庄铁道大学 | Cupric oxide doped siller tin oxide composite and preparation method thereof |
| CN107881360A (en) * | 2017-10-31 | 2018-04-06 | 靖江市海源有色金属材料有限公司 | Silver copper oxide stannic oxide materials and its manufacture method |
| EP3799977A1 (en) | 2019-10-01 | 2021-04-07 | ABB Schweiz AG | Method for manufacturing an ag-based electrical contact material, an electrical contact material and an electrical contact obtained therewith |
| US11923153B2 (en) | 2019-10-01 | 2024-03-05 | Abb Schweiz Ag | Method for manufacturing an Ag-based electrical contact material, an electrical contact material and an electrical contact obtained therewith |
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Application publication date: 20150408 |