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Silver nickel electricity-conductive ceramic electrical contact material and its production method

A technology of electrical contact materials and conductive ceramics, which is applied in the direction of contact materials, cable/conductor manufacturing, circuits, etc., can solve the problems of high contact resistance, uneven metallographic structure, resistance to fusion welding, resistance to arc burning and resistance Problems such as low electrical wear performance

Active Publication Date: 2008-02-20
SHANGHAI LONGSUN ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention is mainly aimed at the non-uniform metallographic structure, coarse nickel metallographic structure, high contact resistance, low welding resistance, arc burning resistance and electrical wear resistance of the silver-nickel electric contact material produced by the traditional method. The shortcoming of the life is not high, by adding conductive ceramics and rare earth elements to the silver-nickel alloy, and improving the production process at the same time, improve and improve the comprehensive performance of the silver-nickel electrical contact material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Nickel 5%,

[0022] TiN 2 , SnO 2 0.2% of one or a combination of two conductive ceramics,

[0023] Rare earth lanthanum, cerium or a combination of two 0.1%,

[0024] The balance is silver and unavoidable impurities.

Embodiment 2

[0026] Nickel 40%,

[0027] TiN 2 , SnO 2 One or a combination of two conductive ceramics 2%,

[0028] Rare earth lanthanum, cerium or a combination of two 1%,

[0029] The balance is silver and unavoidable impurities.

Embodiment 3

[0031] Nickel 22.5%,

[0032] TiN 2 , SnO 2 1.1% of one or a combination of two conductive ceramics,

[0033] Rare earth lanthanum, cerium or a combination of two 0.5%,

[0034] The balance is silver and unavoidable impurities.

[0035] The manufacturing process of the silver-nickel conductive ceramic electric contact material of the present invention is as follows:

[0036] 1) Milling:

[0037] ——Silver powder: Melt silver ingots in an intermediate frequency induction furnace, then add rare earths in proportion to smelt silver rare earth alloys, and then atomize silver rare earth alloy melts into powders on high-pressure centrifugal atomization equipment. The average particle size of the powders is 1 μm to 20 μm .

[0038] ——Nickel powder: commercially available electrolytic nickel powder, with an average particle size of 1 μm to 20 μm.

[0039] ——Conductive ceramic powder: commercially available, with an average particle size of 1 μm to 20 μm.

[0040] Silver rare ea...

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Abstract

The utility model provides a method for manufacturing electrical contact material, and can manufacture silver-nickel conductive ceramics electrical contact material characterized in steady contacting resistance, multiple fusion characteristic, voltaic arc burning tolerance and electric wear resistance. The electrical contact material comprises nickel, conductive ceramics (TiN2, SnO2 single or combination), rare-earth (lanthanum, cerium single or combination), silver and unavoidable impurities. The electrical contact elements are made by producing powder, mechanically mixing, high-energy ball milling, isopressing forming, sintering, extruding and contour machining orderly. The finished electrical contact elements overcomes the defects of prior art electrical contact element such as unstable contacting resistance, insufficient fusion characteristic, high voltaic arc burning loss and low electric wear resistance.

Description

Technical field: [0001] The invention relates to the technical field of manufacturing technology of electrical alloy materials, and mainly relates to the manufacture of silver-nickel conductive ceramic electric contact materials. Background technique: [0002] The traditional silver-nickel electrical contact material is manufactured by powder metallurgy process, and its chemical composition is: nickel: 5% to 40%, silver as the balance. The processing process is as follows: [0003] Silver powder+nickel powder→mechanical powder mixing→press forming→sintering→extrusion→forming [0004] The silver-nickel electrical contact material produced by the traditional method has uneven distribution of nickel particles, agglomeration, and coarse structure in the metallographic structure, resulting in high contact resistance of the material, resistance to welding, arc burnout and electrical wear resistance. Low, the service life of the contact is relatively low. With the continuous dev...

Claims

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Application Information

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IPC IPC(8): H01B1/02H01H1/02C22C5/06H01B13/00
Inventor 郑元龙郑大受谢忠光
Owner SHANGHAI LONGSUN ALLOY CO LTD
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