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High-Cr-content high-pressure-resistance copper-chromium contact material and manufacturing method thereof

A technology of copper-chromium contacts and high pressure resistance, which is applied in the field of metal matrix composite materials, can solve the problems of insignificant improvement of the compressive strength of the chromium phase, difficulty in changing the composition and state of the chromium phase, and limited overall effect, and achieve good compactness , uniform structure, and the effect of improving the pressure resistance

Active Publication Date: 2015-11-04
SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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Problems solved by technology

Due to the complex metallurgical issues involved, the composition and state of the chromium phase are difficult to change. Most of the other metal powders added have not changed their composition. They are embedded in the copper matrix or change the composition or state of the copper phase. The compressive strength of the chromium phase The improvement is not obvious, and the overall effect is limited

Method used

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  • High-Cr-content high-pressure-resistance copper-chromium contact material and manufacturing method thereof
  • High-Cr-content high-pressure-resistance copper-chromium contact material and manufacturing method thereof

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0036] A copper-chromium contact material with high Cr content and high pressure resistance, which is composed of the following components in weight percentage: Cr is 60-70%, and the balance is Cu; the raw materials are respectively 50-100 micron Cr powder and 100 Cu powder below micron.

[0037] The chromium powder is electrolytic chromium powder or thermite reduced chromium powder, and the copper powder is electrolytic copper powder or atomized copper powder.

[0038] The purity of the chromium powder is 99.97%-99.98%.

[0039] The preparation method of the copper chromium contact material with high Cr content and high pressure resistance comprises the following steps:

[0040] (1) Raw material selection

[0041] Choose 50-100 micron chromium powder and 100 micron copper powder;

[0042] (2) mixed powder

[0043] Form the mixed powder of...

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Abstract

The invention relates to a high-Cr-content high-pressure-resistance copper-chromium contact material and a manufacturing method thereof. The copper-chromium contact material comprises, by weight percentage, 60%-70% of Cr and the balanced Cu. The manufacturing method includes the steps of raw material selection, powder mixing, blank pressing, infiltration and annealing. On the basis that only CuCr1 to CuCr50 materials can be manufactured on the basis of an existing powder metallurgy, casting and electric arc melting process, the high-performance contact material with the Cr content higher than 70% is developed, and therefore the requirement of the high-voltage stage for the pressure-resistant performance is met. According to the high-Cr-content high-pressure-resistance copper-chromium contact material, the high-melting-point Cr serves as a basic framework, Cu powder is doped to form a CuCr pressing blank with a certain strength, and then vacuum infiltration is carried out to obtain the high-Cr-content copper-chromium contact material.

Description

technical field [0001] The invention relates to a copper-chromium contact material with high Cr content and high pressure resistance and a preparation method thereof, belonging to the field of metal matrix composite materials. Background technique [0002] Copper-chromium alloy is a high-performance electrical functional material due to its high compressive strength and good electrical conductivity. At present, copper-chromium contacts are widely manufactured by powder metallurgy. The basic process is to fully mix copper powder and chromium powder in a ball mill, and then cold-press the mixed powder at room temperature or hot-press and sinter at high temperature. With the improvement of the level of power transmission and transformation, the requirements for contacts are getting higher and higher. It is necessary to add other elements to the copper-chromium powder metallurgy copper-chromium contact material to make an alloyed copper-chromium contact material. The main purpos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C27/06C22C1/04C22F1/11
Inventor 王小军刘凯师晓云王文斌李刚郭创立赵俊
Owner SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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