CN104201019A - Manufacturing process for silver zinc oxide copper oxide electrical contact and electrical contact product - Google Patents
Manufacturing process for silver zinc oxide copper oxide electrical contact and electrical contact product Download PDFInfo
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- CN104201019A CN104201019A CN201410407709.3A CN201410407709A CN104201019A CN 104201019 A CN104201019 A CN 104201019A CN 201410407709 A CN201410407709 A CN 201410407709A CN 104201019 A CN104201019 A CN 104201019A
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- electrical contact
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- copper alloy
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Abstract
The invention discloses a manufacturing process for a silver zinc oxide copper oxide electrical contact and an electrical contact product. In the manufacturing process, the electrical contact product is manufactured through smelting, ingot casting, hot extrusion, drawing into ally wires, forming of required specification of sheet through cold heading, then diffusion annealing and oxidation treatment. The electrical contact product produced by adopting the preparation method is characterized in that the electrical contact product is low in surface contact resistance, good in electrical property and arc extinguishing performance, high in welding resistance and good in combination property. The processing method is simple, the material utilization rate is high, the detrimental impurity is few, the production cost is low, and the production cycle is low. The economic benefit and social benefit are particularly obvious.
Description
Technical field
The invention belongs to electrical contact manufacturing technology field, specifically refer to manufacturing process of a kind of Ag-ZnO cupric oxide electrical contact and products thereof.
Background technology
In low voltage equipment, the core parts electrical contact of control apparatus is carrying the burdensome task of connecting breaking current.It is the important guarantee that guarantees equipment safety operation and people's security of the lives and property.
Using at present electrical contact production technology is nothing but that the large class of powder metallurgy and alloy inner oxidation method two is produced.Each contact manufacturer continues to use alloy inner oxidation method and produces the in the majority of electrical contact product.The method production link covers the process implementations such as weld layer, cold rolling, punch forming, oxidation processes by melting, ingot casting, surface treatment, hot rolling.Production link is many, and the production cycle is long, and production efficiency is low, and production cost is high, and stock utilization low (only having 38%～54%).Material back and forth has enough to meet the need input, brings more impurity composition to contact matrix, and contact matrix is polluted, and its performance is had a strong impact on.Fall flat and useful life.And the Ag-ZnO contact ubiquity temperature rise that existing low voltage equipment is used, the drawback that surface contacted resistance is large, easily melting welding is on the hazard safety.
Thereby solving above-mentioned shortcoming and drawback has real and far-reaching significance and considerable economic worth.
Summary of the invention
First object of the present invention is the shortcoming and defect existing in order to overcome prior art, and a kind of manufacturing process of Ag-ZnO cupric oxide electrical contact is provided.By this manufacturing process, simplify technical process, thereby improved stock utilization, reduced production cost, process simplification makes to bring into impurity level minimizing simultaneously, and the conductance of electrical contact is obviously improved.
Another object of the present invention is to provide a kind of Ag-ZnO cupric oxide electrical contact product that utilizes above-mentioned manufacture method to process.
For realizing first object of the present invention, technical scheme of the present invention is
(1) preparation of silk material:
1.1, vacuum melting casting obtains silver zinc copper alloy cast ingot;
1.2, under protective gas, heating-up temperature is 530 ℃～780 ℃, and the silver zinc copper alloy cast ingot that step (1.1) is prepared obtains silver zinc copper alloy wire by hot extrusion;
1.3, the silver zinc copper alloy wire process of step (1.2) is drawn into the silver zinc copper alloy wire of φ 1.5 ㎜～φ 5 ㎜;
(2) on cold headers, silver zinc copper alloy wire and the filamentary silver of step (1) are cut into segment, and longitudinally coaxial sequence cold-heading be deformed into diameter Wei φ ﹙ 2.5～10 ﹚ ㎜, thickness Wei δ ﹙ 0.5～3.0 ﹚ ㎜ electrical contact blank;
(3) electrical contact blank step (2) being formed is between the temperature of 360 ℃～600 ℃ and have under Buchholz protection state destressing diffusion annealing 1 hour～8 hours, then with cooling 80 ℃ of stove, comes out of the stove below, obtains electrical contact semi-finished product;
(4) the electrical contact semi-finished product after (3) annealing are packed in the electric furnace of logical oxygen and carry out differential temperature oxidation processes: between 500 ℃～700 ℃ of temperature, pressure is oxidation processes 10 hours～40 hours between 0.8 Mpa～2 Mpa; Continuing to heat up between 600 ℃～800 ℃ is between 0.8 Mpa～2 Mpa, to reoxidize to process after end in 8 hours～38 hours by the contact in electric furnace at pressure continuously again, comes out of the stove and obtains electrical contact articles of sheet material through surface treatment.
Further arrange is that in described step (1.1), the material quality percentage of silver zinc copper alloy cast ingot is: zinc (3～10) %; Copper (1～8) %; Yttrium or cerium (0.01～1) %; Surplus is silver.
Further arrange is that silver zinc copper B alloy wire in described step (2) is (7～14) with the ratio of filamentary silver: 1.
Further arranging is that described step (1.2) protective gas is inert gas or hydrogen.
For realizing second goal of the invention of the present invention, its technical scheme is that it comprises following component, by percentage to the quality: zinc oxide (3.73～12.45) %; Cupric oxide (1.25～10.01) %; Yittrium oxide or cerium oxide (0.013～2.54) %; Surplus is silver.
The surface contacted resistance of the electrical contact product of fabrication process of the present invention is low, there is good electrical property, arc extinction performance, resistance fusion welding can be strong, its high comprehensive performance, processing method is simple, and stock utilization is high, objectionable impurities is few, production cost is low, with short production cycle, and economic benefit and social benefit are remarkable especially.
In this technique, add copper and rare earth element to make its contact matrix grain refinement, physical property further improves simultaneously, and the copper in contact matrix and rare earth element have its good arc extinction performance, thereby the combination property of contact is obviously promoted.
technical scheme of the present invention compared with prior art has the following advantages and beneficial effect:
Electrical contact product metallographic structure through the inventive method processing is even, and crystal grain is tiny, and multiple layer bond strength is high.
Cover weld layer, cold rolling, punch forming with the general melting of punching internal oxidation process process, ingot casting, surface treatment, hot rolling, reoxidize to process and compare, outstanding feature of the present invention is to have changed its manufacturing technique method, has simplified technical process.It is the sheet material electrical contact product of cold-heading composite welding layer.The contact sheet material of required size specification is prepared in cold-heading, then destressing diffusion annealing, carries out differential temperature oxidation processes and obtains electrical contact product.Save the operation of rolling plate (hot rolling multiple weld layer, cold rolling), punch forming and also reduced melting number of times simultaneously, solved the reciprocal turnover of rim charge, reduced by the impurity that repeatedly overlapping investment waste is brought into, reduced the probability that contact matrix is polluted, conductance is obviously improved.Make stock utilization increase substantially (can reach more than 90%), and existing stock utilization only have 38%～54%, and production cost is obviously declined.Outstanding economic effect and social benefit have been shown.
Differential temperature oxidation can be shortened oxidization time, and oxide is evenly distributed, and poor oxide region convergence is zero, and oxide concentration is the same outside and inside, and wear resistance is significantly strengthened.
The electrical contact of the compound preparation of cold-heading is higher than the electrical contact density of punching, resistivity obviously reduces, make electrical contact when operation surface contacted resistance reduce, temperature rise be improved significantly.Copper in contact matrix and rare earth element (yttrium or cerium) have its good arc extinction performance.Thereby the combination property of contact is obviously promoted.
Properties of product contrast sees the following form:
| Performance | Cold-heading processing | Punching processing |
| Electricity Zu is Shuaied ﹙ μ Ω c ㎡ ﹚ | 2.4～2.9 | 2.7～3.4 |
| Mi Du ﹙ g/ ㎝ 3﹚ | 9.7～9.98 | 9.5～9.8 |
| Ying Du ﹙ HV ﹚ Mpa | 780～960 | 680～770 |
Below in conjunction with embodiment, the present invention is described further.
Embodiment
Below by embodiment, the present invention is specifically described; only be used to further illustrate the present invention; can not be interpreted as limiting the scope of the present invention, the technician in this field can make some nonessential improvement and adjustment to the present invention according to the content of foregoing invention.
Embodiment mono-:
1, press constituent element quality proportioning: zinc: 5%; Copper: 1.5%; Yttrium: 0.03%; Surplus silver.Melting ingot casting forms silver zinc copper alloy pig.
2, silver zinc copper alloy pig is heated through being squeezed into wire rod, then through pulling to the silk material that diameter is φ 1.5 ㎜.
3, on cold headers, 2 silk material and filamentary silver are combined into the sheet material contact product of φ 3 ㎜ * 0.8 ㎜ through the segment upsetting system that it is suitable that cold headers cut into length.
4,3 contact product is poured in the electric furnace of argon gas to diffusion annealing 60 minutes at 480 ℃ of vacuum states, with stove, be cooled to 80 ℃ and take out products.
5,4 product being packed in the electric furnace that logical oxygen pressure is 1.2 Mpa is 620 ℃ of oxidation processes 6 hours first Xian of temperature, then is warming up to 700 ℃ of oxidation processes 6 hours with stove.Cool to the furnace 100 ℃ come out of the stove below electrical contact finished product.
Embodiment bis-:
1, press constituent element quality proportioning: zinc: 7%; Copper: 3%; Yttrium: 0.05%; Surplus silver.Melting ingot casting forms silver zinc copper alloy pig.
2, silver zinc copper alloy pig is heated through being squeezed into wire rod, then through pulling to the silk material that diameter is φ 2.5 ㎜.
3, on cold headers, 2 silk material and filamentary silver are combined into the sheet material contact product of φ 5 ㎜ * 1.3 ㎜ through the segment upsetting system that it is suitable that cold headers cut into length.
4,3 contact product is poured in the electric furnace of argon gas to diffusion annealing 90 minutes at 500 ℃ of vacuum states, with stove, be cooled to 80 ℃ and take out products.
5,4 product being packed in the electric furnace that logical oxygen pressure is 1.2 Mpa is 630 ℃ of oxidation processes 18 hours first Xian of temperature, then is warming up to 710 ℃ of oxidation processes 16 hours with stove.Cool to the furnace 100 ℃ come out of the stove below electrical contact finished product.
Embodiment tri-:
1, press constituent element quality proportioning: zinc: 8%; Copper: 4%; Cerium: 0.02%; Surplus silver.Melting ingot casting forms silver zinc copper alloy pig.
2, silver zinc copper alloy pig is heated through being squeezed into wire rod, then through pulling to the silk material that diameter is φ 3 ㎜.
3, on cold headers, 2 silk material and filamentary silver are combined into the sheet material contact product of φ 6 ㎜ * 1.5 ㎜ through the segment upsetting system that it is suitable that cold headers cut into length.
4,3 contact product is poured in the electric furnace of argon gas to diffusion annealing 90 minutes at 520 ℃ of vacuum states, with stove, be cooled to 80 ℃ and take out products.
5,4 product being packed in the electric furnace that logical oxygen pressure is 1.2 Mpa is 630 ℃ of oxidation processes 22 hours first Xian of temperature, then is warming up to 720 ℃ of oxidation processes 20 hours with stove.Cool to the furnace 100 ℃ come out of the stove below electrical contact finished product.
Embodiment tetra-:
1, press constituent element quality proportioning: zinc: 9%; Copper: 4%; Cerium: 0.02%; Surplus silver.Melting ingot casting forms silver zinc copper alloy pig.
2, silver zinc copper alloy pig is heated through being squeezed into wire rod, then through pulling to the silk material that diameter is φ 3.5 ㎜.
3, on cold headers, 2 silk material and filamentary silver are combined into the sheet material contact product of φ 8 ㎜ * 1.7 ㎜ through the segment upsetting system that it is suitable that cold headers cut into length.
4,3 contact product is poured in the electric furnace of argon gas to diffusion annealing 120 minutes at 540 ℃ of vacuum states, with stove, be cooled to 80 ℃ and take out products.
5,4 product being packed in the electric furnace that logical oxygen pressure is 1.2 Mpa is 650 ℃ of oxidation processes 26 hours first Xian of temperature, then is warming up to 730 ℃ of oxidation processes 24 hours with stove.Cool to the furnace 100 ℃ come out of the stove below electrical contact finished product.
Embodiment five:
1, press constituent element quality proportioning: zinc: 6%; Copper: 3%; Yttrium: 0.03%; Surplus silver.Melting ingot casting forms silver zinc copper alloy pig.
2, silver zinc copper alloy pig is heated through being squeezed into wire rod, then through pulling to the silk material that diameter is φ 4 ㎜.
3, on cold headers, 2 silk material and filamentary silver are combined into the sheet material contact product of φ 9 ㎜ * 2 ㎜ through the segment upsetting system that it is suitable that cold headers cut into length.
4,3 contact product is poured in the electric furnace of argon gas to diffusion annealing 150 minutes at 560 ℃ of vacuum states, with stove, be cooled to 80 ℃ and take out products.
5,4 product being packed in the electric furnace that logical oxygen pressure is 1.2 Mpa is 650 ℃ of oxidation processes 32 hours first Xian of temperature, then is warming up to 730 ℃ of oxidation processes 30 hours with stove.Cool to the furnace 100 ℃ come out of the stove below electrical contact finished product.
Embodiment six:
1, press constituent element quality proportioning: zinc: 8%; Copper: 2%; Cerium: 0.04%; Surplus silver.Melting ingot casting forms silver zinc copper alloy pig.
2, silver zinc copper alloy pig is heated through being squeezed into wire rod, then through pulling to the silk material that diameter is φ 4.5 ㎜.
3, on cold headers, 2 silk material and filamentary silver are combined into the sheet material contact product of φ 10 ㎜ * 2 ㎜ through the segment upsetting system that it is suitable that cold headers cut into length.
4,3 contact product is poured in the electric furnace of argon gas to diffusion annealing 150 minutes at 560 ℃ of vacuum states, with stove, be cooled to 80 ℃ and take out products.
5,4 product being packed in the electric furnace that logical oxygen pressure is 1.2 Mpa is 650 ℃ of oxidation processes 32 hours first Xian of temperature, then is warming up to 730 ℃ of oxidation processes 30 hours with stove.Cool to the furnace 100 ℃ come out of the stove below electrical contact finished product.
The product physical and mechanical property of above embodiment is: resistivity: ﹙ 2.4～2.9 ﹚ μ Ω c ㎡; Density: ﹙ 9.7～9.98 ﹚ g/ ㎝
3; Hardness: HV ﹙ 780～960 ﹚ Mpa.
Claims (5)
1. a manufacturing process for Ag-ZnO cupric oxide electrical contact, is characterized in that comprising the following steps:
(1) preparation of silk material:
1.1, vacuum melting casting obtains silver zinc copper alloy cast ingot;
1.2, under protective gas, heating-up temperature is 530 ℃～780 ℃, and the silver zinc copper alloy cast ingot that step (1.1) is prepared obtains silver zinc copper alloy wire by hot extrusion;
1.3, the silver zinc copper alloy wire process of step (1.2) is drawn into the silver zinc copper alloy wire of φ 1.5 ㎜～φ 5 ㎜;
(2) on cold headers, silver zinc copper alloy wire and the filamentary silver of step (1) are cut into segment, and longitudinally coaxial sequence cold-heading be deformed into diameter Wei φ ﹙ 2.5～10 ﹚ ㎜, thickness Wei δ ﹙ 0.5～3.0 ﹚ ㎜ electrical contact blank;
(3) electrical contact blank step (2) being formed is between the temperature of 360 ℃～600 ℃ and have under Buchholz protection state destressing diffusion annealing 1 hour～8 hours, then with cooling 80 ℃ of stove, comes out of the stove below, obtains electrical contact semi-finished product;
(4) the electrical contact semi-finished product after (3) annealing are packed in the electric furnace of logical oxygen and carry out differential temperature oxidation processes: between 500 ℃～700 ℃ of temperature, pressure is oxidation processes 10 hours～40 hours between 0.8 Mpa～2 Mpa; Continuing to heat up between 600 ℃～800 ℃ is between 0.8 Mpa～2 Mpa, to reoxidize to process after end in 8 hours～38 hours by the contact in electric furnace at pressure continuously again, comes out of the stove and obtains electrical contact articles of sheet material through surface treatment.
2. the manufacturing process of a kind of Ag-ZnO cupric oxide electrical contact according to claim 1, is characterized in that: in described step (1.1), the material quality percentage of silver zinc copper alloy cast ingot is: zinc 3～10%; Copper 1～8%; Yttrium or cerium 0.01～1%; Surplus is silver.
3. the manufacturing process of a kind of Ag-ZnO cupric oxide electrical contact according to claim 1, is characterized in that: the silver zinc copper B alloy wire in described step (2) and the ratio of filamentary silver are (7～14): 1.
4. the manufacturing process of a kind of Ag-ZnO cupric oxide electrical contact according to claim 1, is characterized in that: described step (1.2) protective gas is inert gas or hydrogen.
5. an Ag-ZnO cupric oxide electrical contact as prepared in one of claim 1-4, is characterized in that it comprises following component, by percentage to the quality: zinc oxide (3.73～12.45) %; Cupric oxide (1.25～10.01) %; Yttrium or cerium (0.013～2.45) %; Surplus is silver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410407709.3A CN104201019B (en) | 2014-08-19 | 2014-08-19 | Manufacturing process of Ag-ZnO cupric oxide electrical contact and products thereof |
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| CN201410407709.3A CN104201019B (en) | 2014-08-19 | 2014-08-19 | Manufacturing process of Ag-ZnO cupric oxide electrical contact and products thereof |
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| CN104201019A true CN104201019A (en) | 2014-12-10 |
| CN104201019B CN104201019B (en) | 2016-05-11 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110158003A (en) * | 2019-05-08 | 2019-08-23 | 上海航天设备制造总厂有限公司 | A kind of solid-solution and aging heat treatment method of satellite conducting slip ring brush contact |
| CN111118328A (en) * | 2019-12-18 | 2020-05-08 | 佛山市诺普材料科技有限公司 | Silver tin oxide indium oxide electrical contact material and preparation method thereof |
| CN111118332A (en) * | 2019-12-26 | 2020-05-08 | 福达合金材料股份有限公司 | Dynamic internal oxidation method for silver-based metal oxide electrical contact material |
| CN112725652A (en) * | 2020-12-24 | 2021-04-30 | 福达合金材料股份有限公司 | Silver zinc oxide electric contact material and preparation method thereof |
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| CN1053817A (en) * | 1989-12-26 | 1991-08-14 | 住经营企画株式会社 | silver-metal oxide composite material and production method thereof |
| JP2005533175A (en) * | 2002-07-12 | 2005-11-04 | メタラー テクノロジーズ インターナショナル エス．アー． | Electrical contact material and manufacturing method thereof |
| CN101777438A (en) * | 2010-01-26 | 2010-07-14 | 上海中希合金有限公司 | High-performance silver cadmium oxide material and manufacturing method thereof |
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- 2014-08-19 CN CN201410407709.3A patent/CN104201019B/en not_active Expired - Fee Related
Patent Citations (5)
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| CN1053817A (en) * | 1989-12-26 | 1991-08-14 | 住经营企画株式会社 | silver-metal oxide composite material and production method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110158003A (en) * | 2019-05-08 | 2019-08-23 | 上海航天设备制造总厂有限公司 | A kind of solid-solution and aging heat treatment method of satellite conducting slip ring brush contact |
| CN111118328A (en) * | 2019-12-18 | 2020-05-08 | 佛山市诺普材料科技有限公司 | Silver tin oxide indium oxide electrical contact material and preparation method thereof |
| CN111118332A (en) * | 2019-12-26 | 2020-05-08 | 福达合金材料股份有限公司 | Dynamic internal oxidation method for silver-based metal oxide electrical contact material |
| CN112725652A (en) * | 2020-12-24 | 2021-04-30 | 福达合金材料股份有限公司 | Silver zinc oxide electric contact material and preparation method thereof |
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| CN104201019B (en) | 2016-05-11 |
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