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Preparation method and products of silver-copper-nickel-ceramic alloy contact material with high welding resistance

A contact material and alloy technology, applied in contacts, electrical components, electrical switches, etc., can solve the problems of copper-based alloy materials easy to oxidize and contact resistance, weak anti-welding performance, poor anti-welding performance, etc. The effect of reducing electrical corrosion, good economic and social benefits, and high resistance to fusion welding

Inactive Publication Date: 2011-05-04
浙江乐银合金有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The first purpose of the present invention is to overcome the high cost of silver-nickel alloy materials in the prior art, the segregation of additives in the silver-nickel alloy and the weak welding resistance, the limited use of silver-copper alloy materials and the welding resistance Poor and copper-based alloy materials are easy to oxidize, contact resistance is unstable and easy to weld, and provide a silver-copper-nickel ceramic high-resistant welding alloy with excellent performance, low cost and suitable for medium-load relays and light-load contactors Material preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The composition and mass percentage of silver-copper-nickel ceramic high-alloy welding alloy contact materials are: 7% copper, 25% nickel, 0.6% conductive ceramics, 2% rare earth copper alloy, 0.02% alkaline earth metal, and the balance of silver.

[0045] The performance of the contact material is: density ≥ 9.75g / cm 3 ; Resistivity ≤ 2.56μΩ·cm; Hardness (HV) 585~795Mp; Tensile strength 320~410Mp; Elongation ≥ 4%.

Embodiment 2

[0047]The composition and mass percentage of the silver-copper-nickel ceramic high-resistance welding alloy contact material are: copper 10%, nickel 20%, conductive ceramic 0.9%, rare earth copper alloy 2.5%, alkaline earth metal 0.03%, and silver balance.

[0048] The properties of the contact material are: density ≥ 9.85g / cm 3 ; Resistivity ≤ 2.38μΩ·cm; Hardness (HV) 560~785Mp; Tensile strength 290~395Mp; Elongation ≥4.5%.

Embodiment 3

[0050] The composition and mass percentage of silver-copper-nickel ceramic high-alloy welding alloy contact materials are: copper 15%, nickel 17%, conductive ceramic 1.2%, rare earth copper alloy 3%, alkaline earth metal 0.025%, silver balance.

[0051] The performance of the contact material is: density ≥ 9.80g / cm 3 ; Resistivity ≤ 2.34μΩ·cm; Hardness (HV) 530~765Mp; Tensile strength 280~385Mp; Elongation ≥ 5%.

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Abstract

The invention discloses a preparation method and products of a silver-copper-nickel-ceramic alloy contact material with high welding resistance. The contact material is prepared by adding 0.08-10wt% of rare earth copper alloys, 0.02-1.5wt% of alkaline earth metals, 3-25wt% of nickel and 0.03-5wt% of conductive ceramics to 7-60wt% of copper and balance of silver, wherein the silver and the copper serve as substrates. The contact material can be widely applied to medium load relays and small load contactors, thus greatly reducing cost of wires used for rivets, and the contact material has high welding resistance and low surface contact resistance, thereby being preferential in terms of comprehensive performances such as economy and technology.

Description

technical field [0001] The invention belongs to electrical contact materials, in particular to a preparation method and a product thereof of a silver-copper-nickel ceramic high-resistant welding alloy contact material for medium-duty contacts. Background technique [0002] Contacts for relays and small current contactors are basically rivet-type contacts, and the rivets are formed by punching wire materials. Although silver-copper alloy materials are currently used as medium-load relays and small-current contacts, silver-copper alloy materials are not as strong in welding resistance as silver-nickel alloys, and the cost of silver-nickel alloy materials is relatively high. Through retrieval, Chinese Patent Publication No. CN101127253A discloses a silver-nickel conductive ceramic electric contact material and its manufacturing method. Its technical solution is to directly add rare earth smelting by melting silver ingots, which will cause segregation of alloy components, and in...

Claims

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Application Information

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IPC IPC(8): H01H1/021C22C1/05
Inventor 郑晓杰张树堂
Owner 浙江乐银合金有限公司
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