CN102899551A - Silver-saving silver tungsten carbide graphite electrical contact material for high-performance low-voltage circuit breaker - Google Patents
Silver-saving silver tungsten carbide graphite electrical contact material for high-performance low-voltage circuit breaker Download PDFInfo
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- CN102899551A CN102899551A CN2012104402762A CN201210440276A CN102899551A CN 102899551 A CN102899551 A CN 102899551A CN 2012104402762 A CN2012104402762 A CN 2012104402762A CN 201210440276 A CN201210440276 A CN 201210440276A CN 102899551 A CN102899551 A CN 102899551A
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Abstract
The invention discloses a silver-saving silver tungsten carbide graphite electrical contact material for a high-performance low-voltage circuit breaker, which comprises the following components by weight percent: 9-16wt% of tungsten carbide, 2-9wt% of vanadium carbide and 1-4wt% of graphite, additive elements and the balance of silver, wherein the additive elements are selected from one or more of the following elements: 0-0.4wt% of Ni-P, 0.1-0.9wt% of Si, 0.3-1wt% of Co and 0.1-0.3wt% of Ni, and the Ni content in the Ni-P is 76-85wt%. An electrical contact provided by the invention has better arc burning loss resisting capability, shows higher electrical endurance and is low in manufacturing cost, and the components and performances are optimized and matched.
Description
Technical field
The invention belongs to the electrical contact material technical field, specifically refer to a kind of high-performance low-voltage isolating switch Jie Yinyin wolfram varbide graphite electrical contact material.
Background technology
Electrical contact is the contact member of electric switch, instrument etc., mainly bears the effect of connection, minute deenergizing and load current.As the material of preparation electrical contact, Ag-based electrical contact material is the maximum and most widely used class of consumption wherein.Ag-based electrical contact material on the electrical equipment not only consumption is large, and in use because deterioration and approach exhaustion gradually can not reclaim is scrapped silver remaining on the electrical equipment or Ag-based electrical contact, owing to disperse also to be difficult to reclaim.Yet the resource of silver is few, and silver-colored about 25% of produced worldwide is used for electronics and electrician, and basically is consumed in the manufacturing contact.Therefore, reduce the contact silver consuming amount of each electric equipment products, the performance that improves simultaneously silver-based contact is an of great value job.
Normal and the AgW50 counterpart application of traditional silver-colored wolfram varbide graphite electrical contact has a large capacity and a wide range in the supporting contact of breaker of plastic casing; Because added graphite in the silver-colored wolfram varbide graphite electrical contact material, graphite becomes reducing atmosphere under arcing, prevents the WC oxidation, reduce contact resistance, minimizing is splashed, and has the characteristics such as good resistance fusion welding, contact resistance are low and stable.Because silver-colored wolfram varbide graphite electrical contact silver content higher (theoretical silver content is 85%), along with silver-colored valency rises steadily, it is expensive that the price of the silver-colored wolfram varbide graphite electrical contact that makes becomes, and virtually improved the manufacturing cost of low-voltage apparatus.
Summary of the invention
The objective of the invention is in order to overcome the shortcoming and defect of prior art existence, the application optimizes cooperation more based on composition (element) and performance, and providing a kind of anti-electric-arc scaling loss strong, electric life is long, the high-performance low-voltage isolating switch that cost is lower Jie Yinyin wolfram varbide graphite electrical contact material.
For achieving the above object, technical scheme of the present invention is wolfram varbide 9-16wt%, vanadium carbide 2-9wt%, graphite 1-4wt%, interpolation element are one or more in the following element: 0-0.4wt%Ni-P, 0.1-0.9wt%Si, 0.3-1wt%Co, 0.1-0.3wt%Ni, wherein Ni content is 76-85wt% among the Ni-P, Yu Weiyin.
Further setting is that the grain diameter of described vanadium carbide is 0.5-4 μ m.
The application realizes that the mentality of designing of foregoing invention purpose and the mechanism of action are: because the wettability of WC and graphite and silver is relatively poor, silver-colored wolfram varbide graphite electrical contact tissue bond mode belongs to machinery and bites mould assembly, and substrate combinating strength is lower, and the anti-electric-arc scaling loss is relatively poor; The carbonization alum is preferably constituent element of a kind of anti-electric-arc scaling loss, and better with the wettability of silver, and therefore, the carbonization alum that adds specified quantitative has improved bonding strength and the anti-electric-arc scaling loss of silver-colored wolfram varbide graphite electrical contact, also can not affect other performances of material simultaneously.In addition, there is the Transient liquid phase sintering process in the AgWCC contact that has added additive Ni-P alloy: low melting point eutectic phase Ni-P powdered alloy is in sintering process, the liquid phase Ni-P alloy of fusing under wicking action between powder particle diffusive migration, promote particle re-arrangement; And as the passage of Elements Diffusion, favourable raising the diffusion between the matrix silver element, increase the body material density thereby reach, strengthen the purpose of body material bonding strength.Because the present invention is under the original performance prerequisite that guarantees contact, adopt the carbonization alum to replace part silver, not only reduce cost, and further improved the electrical property of contact material; The interpolation element that adds simultaneously can improve the wettability of wolfram varbide and silver matrix, reduces resistance, increases intensity, referring to the experimental data of embodiment.The present invention is on traditional silver-colored wolfram varbide graphite electrical contact material basis, adopt the carbonization alum to replace part silver, add simultaneously the interpolation element that improves wettability, not only improved substrate combinating strength, strengthened anti-electric-arc scaling loss performance, mechanical property and the electrical property of contact material get a promotion simultaneously; Reduce simultaneously material cost, promoted the market competitiveness of the type contact.
Following embodiment is done further introduction to the present invention.
Embodiment
Embodiment one:
A kind of high-performance low-voltage isolating switch Jie Yinyin wolfram varbide graphite electrical contact material, its main body composition comprises: wolfram varbide 15wt%, vanadium carbide 3wt%, graphite 1wt%, interpolation element are one or more in the following element: 0.2%Ni-P, 0.34%Si, Yu Weiyin.The type contact application is on rated current 63A breaker of plastic casing, and the disjunction index reaches 15KA, electric life 5223 times.
Embodiment two:
A kind of high-performance low-voltage isolating switch Jie Yinyin wolfram varbide graphite electrical contact material, its main body composition comprises: wolfram varbide 10wt%, vanadium carbide 5wt%, graphite 2.5wt%, interpolation element are one or more in the following element: 0.6%Si, 0.32%Co, 0.18%Ni-P, Yu Weiyin.The type contact application is on rated current 100A breaker of plastic casing, and the disjunction index reaches 25KA, electric life 4657 times.
Embodiment three:
A kind of high-performance low-voltage isolating switch Jie Yinyin wolfram varbide graphite electrical contact material, its main body composition comprises: wolfram varbide 13wt%, vanadium carbide 4.8wt%, graphite 3.2wt%, interpolation element are one or more in the following element: 0.24%Ni-P, 0.18%Si, 0.27%Co, Yu Weiyin.The type contact application is on rated current 225A breaker of plastic casing, and the disjunction index reaches 35KA, electric life 3158 times.
Claims (2)
1. a high-performance low-voltage isolating switch is with Jie Yinyin wolfram varbide graphite electrical contact material, it is characterized in that comprising following component, by percentage to the quality: wolfram varbide 9-16wt%, vanadium carbide 2-9wt%, graphite 1-4wt%, interpolation element are one or more in the following element:
0-0.4wt%Ni-P, 0.1-0.9wt%Si, 0.3-1wt%Co, 0.1-0.3wt%Ni, wherein Ni content is 76-85wt% among the Ni-P, Yu Weiyin.
2. a kind of high-performance low-voltage isolating switch according to claim 1 is with Jie Yinyin wolfram varbide graphite electrical contact material, and it is characterized in that: the grain diameter of described vanadium carbide is 0.5-4 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210440276.2A CN102899551B (en) | 2012-11-07 | 2012-11-07 | Silver-saving silver tungsten carbide graphite electrical contact material for high-performance low-voltage circuit breaker |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210440276.2A CN102899551B (en) | 2012-11-07 | 2012-11-07 | Silver-saving silver tungsten carbide graphite electrical contact material for high-performance low-voltage circuit breaker |
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| CN102899551A true CN102899551A (en) | 2013-01-30 |
| CN102899551B CN102899551B (en) | 2014-12-10 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104835656A (en) * | 2014-02-12 | 2015-08-12 | 日本钨合金株式会社 | Electric contact material, electric contact pair, and circuit breaker |
| CN111363947A (en) * | 2020-03-09 | 2020-07-03 | 温州中希电工合金有限公司 | Silver tungsten carbide graphite composite material added with nickel alloy and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104835656A (en) * | 2014-02-12 | 2015-08-12 | 日本钨合金株式会社 | Electric contact material, electric contact pair, and circuit breaker |
| CN111363947A (en) * | 2020-03-09 | 2020-07-03 | 温州中希电工合金有限公司 | Silver tungsten carbide graphite composite material added with nickel alloy and preparation method thereof |
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| Publication number | Publication date |
|---|---|
| CN102899551B (en) | 2014-12-10 |
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Effective date of registration: 20220128 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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