Preparation method for novel welding-resistant ablation-resistant long-service-life copper-chromium contact material

A contact material and anti-welding technology, applied in the direction of contacts, electrical components, circuits, etc., can solve the problem that the degree of densification cannot be guaranteed, and achieve equivalent conductivity, high anti-welding resistance and ablation resistance Sexuality, the effect of simplifying the process

Active Publication Date: 2015-11-25
SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0006] However, prior art for Al 2 o 3 The post-treatment process of dispersion strengthened Cu and Cr powder is less studied, especially the powder metallurgy method is used to prepare the alloy. The basic process is: powder rolling→sintering→surface treatment→rolling→heat treatment→processing, such a method The process is simple, the cost is low, the alloy composition is easy to control, and it is suitable for large-scale production, but there are certain defects in the post-processing process, that is, the degree of densification cannot be guaranteed, so it needs further improvement

Method used

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  • Preparation method for novel welding-resistant ablation-resistant long-service-life copper-chromium contact material
  • Preparation method for novel welding-resistant ablation-resistant long-service-life copper-chromium contact material

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Embodiment 1

[0024] A Novel Anti-welding and Anti-ablation Cu-nano-Al 2 o 3 -The preparation method of Cr contact material, the steps are as follows:

[0025] (1) Ingredients: According to the alloy composition, Al 2 o 3 Content is 1.2wt% dispersion strengthened Cu powder and Cr powder according to the ratio of Cr weight content is 5wt% batching; Wherein, described Cu-Al 2 o 3 The powder is prepared by internal oxidation method, the powder particle size is -80 mesh, the Cu-Al 2 o 3 The preparation method of the powder is: first conduct induction melting of Cu, gradually raise the temperature and control the melting temperature at 1150°C until the copper is completely melted, then add the required Cu-Al alloy powder according to the composition requirements after 3-5 minutes, and sieve, with H 2 Partially oxidized part of the alloy is re-reduced, and the Cu-Al alloy powder and Cu 2 O powder is mixed with powder, placed in a closed container, and internally oxidized at 900°C for 2.5h...

Embodiment 2

[0031] A Novel Anti-welding and Anti-ablation Cu-nano-Al 2 o 3 -The preparation method of Cr contact material, the steps are as follows:

[0032] (1) Ingredients: According to the alloy composition, Al 2 o 3The content is 1.2wt% dispersion strengthened Cu powder and Cr powder according to the ratio of Cr weight content is 25wt%; Wherein, the Cu-Al 2 o 3 The powder is prepared by internal oxidation method, the powder particle size is -80 mesh, the Cu-Al 2 o 3 The preparation method of the powder is as follows: first conduct induction melting of Cu, gradually raise the temperature and control the melting temperature between 1180°C until the copper is completely melted, and then add the required Cu-Al alloy according to the composition requirements after 3-5 minutes, until all Melt, then gas atomize powder, obtain Cu-Al alloy powder, sieve, use H 2 Partially oxidized part of the alloy is re-reduced, and the Cu-Al alloy powder and Cu 2 O powder is mixed with powder, placed...

Embodiment 3

[0038] A Novel Anti-welding and Anti-ablation Cu-nano-Al 2 o 3 -The preparation method of Cr contact material, the steps are as follows:

[0039] Ingredients: According to the alloy composition, Al 2 o 3 The content is 1.2wt% dispersion strengthened Cu powder and Cr powder according to the ratio of Cr weight content is 50wt%; Wherein, the Cu-Al 2 o 3 The powder is prepared by internal oxidation method, the powder particle size is -80 mesh, the Cu-Al 2 o 3 The preparation method of the powder is: first conduct induction melting of Cu, gradually raise the temperature and control the melting temperature between 1200°C until the copper is completely melted, and then add the required Cu-Al alloy according to the composition requirements after 3-5 minutes, until all Melt, then gas atomize powder, obtain Cu-Al alloy powder, sieve, use H 2 Partially oxidized part of the alloy is re-reduced, and the Cu-Al alloy powder and Cu 2 O powder is mixed with powder, placed in a closed c...

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Abstract

The invention discloses a preparation method for a novel welding-resistant ablation-resistant Cu-nano Al2O3-Cr contact material, and belongs to the technical field of Cu-Cr contact materials. According to the alloy components, dispersion-strengthened Cu-Al2O3 powder with the content of Al2O3 being 1.2wt% and Cr powder are mixed according to the proportion of the content of Cr being 5-50wt%; and the mixture is subjected to powder mixing, primary pressing, sintering, secondary pressing and secondary sintering. The technical process is greatly simplified, the parameters are stable and reliable, the whole process is easy to control, and the preparation method is suitable for large-scale continuous production. The Cu-nano Al2O3-Cr contact material prepared through the technology is good in compactness and high in electrical conductivity, and the hardness is improved by about 25HV compared with a contact material manufactured in the prior art. The Cr particles are evenly distributed in the dispersion-strengthened Cu base body, the softening temperature of the Cu-nano Al2O3-Cr contact material is above 950 DEG C, and the novel welding-resistant ablation-resistant Cu-nano Al2O3-Cr contact material has high welding resistance and ablation resistance.

Description

technical field [0001] The present invention relates to the technical field of Cu-Cr contact materials, in particular to a novel anti-welding and anti-ablation Cu-nano-Al 2 o 3 - Preparation method of Cr contact material. Background technique [0002] Cu-Cr series alloys are widely used in the preparation of resistance welding electrodes, contact materials, integrated circuit lead frames, trams and electric train overhead wires due to their high strength and hardness, good thermal conductivity and corrosion resistance. Steering gear of electric tools, large high-speed turbine generator rotor wires, electrical plugs, switches, motor collector rings and other products requiring high conductivity and high strength. [0003] Among them, the use of Cu-Cr as the contact material was first developed by Westinghouse Company of the United States and EEC Company of the United Kingdom. The Cu and Cr components in the alloy of this new contact material exist in the form of a pseudo-al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/04C22C9/00C22C27/06H01H1/021H01H1/025
Inventor 王小军刘凯王文斌李刚郭创立李鹏杨芳
Owner SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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