Preparation method of silver-nickel electric contact material

An electrical contact material, silver-nickel technology, is applied in the field of preparation of silver-nickel electrical contact materials to achieve the effects of enhancing the resistance to arc burnout, short production cycle and high material utilization rate

Inactive Publication Date: 2020-12-08
浙江耐迩合金科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a preparation method of a silver-nickel electrical contact material to solve the problems of how to enhance the anti-arc burning ability of the silver-nickel material at a relatively high current level

Method used

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  • Preparation method of silver-nickel electric contact material

Examples

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preparation example Construction

[0032] The preparation method of described silver-nickel electric contact material, comprises the following steps:

[0033] (1) Pass 42-86 parts of silver powder and 10-25 parts of nickel powder through a 100-200 mesh sieve to obtain mixed silver-nickel mixed powder;

[0034] (2) Mix the mixed silver-nickel mixed powder prepared in step (1) with 6-12 parts of rubidium carbonate powder, 0.4-0.7 parts of lanthanum powder, and 2-9 parts of molybdenum carbide powder in a plow-shovel type powder mixer for 3- 5h, silver-nickel-rubidium carbonate-lanthanum-molybdenum carbide mixed powder was obtained;

[0035] (3) Press the silver-nickel-rubidium carbonate-lanthanum-molybdenum carbide mixed powder prepared in step (2) into an ingot under a pressure of 200-300 MPa and a holding time of 12-36 seconds on a cold isostatic press, Prepare silver-nickel-rubidium carbonate-lanthanum-molybdenum carbide ingot;

[0036] (4) Sinter the silver-nickel-rubidium carbonate-lanthanum-molybdenum carb...

Embodiment 1

[0039] A silver-nickel electrical contact material, comprising the following raw materials in parts by weight: 45 parts of silver powder, 11 parts of nickel powder, 6 parts of rubidium carbonate powder, 0.4 part of lanthanum powder, and 3 parts of molybdenum carbide powder;

[0040] The particle size of the silver powder is 0.6-9.6 μm;

[0041] The particle size of the nickel powder is 0.4-12.2 μm;

[0042] The particle size of the rubidium carbonate powder is 0.2-7.1 μm;

[0043] The particle size of the lanthanum powder is 0.8-6.2 μm;

[0044] The particle size of the molybdenum carbide powder is 0.3-7.8 μm;

[0045] The preparation method of described silver-nickel electric contact material, comprises the following steps:

[0046] (1) Pass 45 parts of silver powder and 11 parts of nickel powder through a 100-mesh sieve to obtain mixed silver-nickel mixed powder;

[0047] (2) Mix the mixed silver-nickel mixed powder prepared in step (1) with 6 parts of rubidium carbonate...

Embodiment 2

[0051] A silver-nickel electrical contact material, comprising the following raw materials in parts by weight: 65 parts of silver powder, 18 parts of nickel powder, 10 parts of rubidium carbonate powder, 0.6 part of lanthanum powder, and 6 parts of molybdenum carbide powder;

[0052] The particle size of the silver powder is 0.8-9.2 μm;

[0053] The particle size of the nickel powder is 0.6-12.1 μm;

[0054] The particle size of the rubidium carbonate powder is 0.42-7.2 μm;

[0055] The particle size of the lanthanum powder is 1-5.9 μm;

[0056] The particle size of the molybdenum carbide powder is 0.4-8.2 μm;

[0057] The preparation method of described silver-nickel electric contact material, comprises the following steps:

[0058] (1) Pass 65 parts of silver powder and 18 parts of nickel powder through a 200-mesh sieve to obtain mixed silver-nickel mixed powder;

[0059] (2) Mix the mixed silver-nickel mixed powder prepared in step (1) with 10 parts of rubidium carbonate ...

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Abstract

The invention discloses a preparation method of a silver-nickel electric contact material. The preparation method comprises the following steps that (1) silver powder and nickel powder are sieved, andsilver-nickel mixed powder is prepared; (2) the silver-nickel mixed powder prepared in step (1) is mixed with rubidium carbonate powder, lanthanum powder and molybdenum carbide powder in a plough shovel type powder mixing machine, and silver-nickel-rubidium carbonate-lanthanum-molybdenum carbide mixed powder is prepared; (3) the silver-nickel-rubidium carbonate-lanthanum-molybdenum carbide mixedpowder prepared in step (2) is pressed into an ingot on a cold isostatic press, and a silver-nickel-rubidium carbonate-lanthanum-molybdenum carbide ingot is prepared; and (4) the silver-nickel-rubidium carbonate-lanthanum-molybdenum carbide ingot prepared in step (3) is sintered and extruded into a wire or a plate under nitrogen protection, the wire is used for cold heading to make rivet contacts,the plate is rolled and punched to produce sheet contacts, and the silver-nickel electric contact material is prepared. The preparation method is simple in preparation process, short in production period, high in material utilization rate, suitable for large-scale production and capable of being widely applied and popularized.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrical contact materials, and in particular relates to a preparation method of silver-nickel electrical contact materials. Background technique [0002] In the field of electrical contacts, silver-nickel electrical contact materials have good electrical and thermal conductivity, excellent resistance to arc burnout under low current conditions, and low and stable contact resistance. AgNi material has excellent processing performance, low manufacturing cost, easy mass production, and is an environmentally friendly electrical contact material, so it is widely used in AC contactors and relays with current levels of 25A and below. With the increase of the current level, the silver-nickel material will not be able to meet the requirements of use due to its poor anti-welding performance and anti-arc burning performance. [0003] How to enhance the welding resistance and arc burning resistance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C5/06C22C32/00B22F3/04B22F3/10H01H1/0233
CPCB22F3/04B22F3/1007C22C1/05C22C5/06C22C32/0047C22C32/0089H01H1/0233
Inventor 陈春洪林常
Owner 浙江耐迩合金科技有限公司
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