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Method for preparing CuCrMo contact material by adopting CrMo alloy powder

A technology of contact materials and electrical contact materials, which is applied in the direction of contacts, electrical components, electrical switches, etc., and can solve the problems of mechanical reliability and side effects

Inactive Publication Date: 2010-07-28
SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increased contact contact pressure can also help with welding issues, but will inevitably have side effects in terms of mechanical reliability

Method used

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  • Method for preparing CuCrMo contact material by adopting CrMo alloy powder
  • Method for preparing CuCrMo contact material by adopting CrMo alloy powder
  • Method for preparing CuCrMo contact material by adopting CrMo alloy powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 8 kg of Cr block and 2 kg of Mo block and melt at 1700 ° C for 20 minutes to make CrMo alloy. Under the protection of liquid at -150 ° C, CrMo alloy is processed into CrMo alloy powder by grinding and crushing machine. Sintering for 4 hours, and then infiltrating at 1100°C for 2 hours, the CuCrMo electrical contact material was prepared.

Embodiment 2

[0024] Weigh 0.64 kg of Cr block and 0.16 kg of Mo block and melt at 1800°C for 8 minutes to make CrMo alloy. Under the protection of liquid at -150°C, the CrMo alloy is processed into CrMo alloy powder by grinding and crushing machine, and the alloy powder is pressed at 1300 ℃ sintering for 3 hours, and then infiltrated at 1200 ℃ for 1.5 hours to obtain CuCrMo electrical contact material.

Embodiment 3

[0026] Weigh 6.0kg of Cr block, 1.5kg of Mo block and melt at 1900°C for 5min to make CrMo alloy. Under the protection of -150°C liquid, the CrMo alloy is processed into CrMo alloy powder by grinding and crushing machine, and the alloy powder is pressed at 1400 ℃ sintering for 2 hours, and then infiltrated at 1300 ℃ for 1 hour to prepare CuCrMo electrical contact material.

[0027] The composite material prepared by the invention has excellent comprehensive properties. The performance comparison between the prepared CuCrMo composite material and the CuCrMo composite material prepared by direct powder mixing is shown in Table 1.

[0028] Table 1 Performance comparison of Cu-W composites

[0029]

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PUM

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Abstract

The invention discloses a method for preparing a CuCrMo contact material by adopting CrMo alloy powder. In the method, Cr blocks and Mo blocks are firstly prepared into intermediate alloy, and then through low-temperature grinding and pulverizing, CrMo alloy powder is prepared to replace Cr and Mo mixed powder to prepare a CuCrMo electrical contact, wherein the CuCrMo electrical contact comprises the following components in percentage by weight: 10 percent of Mo, 40 percent of Cr and the balance of Cu. The electrical contact is obtained through the following method of: smelting the Cr blocks and the Mo blocks in a vacuum furnace; preparing the CrMo alloy powder through low-temperature pulverizing; preparing a CrMo skeleton through press molding and sintering; and then infiltrating Cu to prepare a CuCrMo composite material. The preparation method has simple process and low cost; and compared with a CuCrMo composite material prepared by direct powder mixing, the prepared CuCrMo composite material has more excellent properties.

Description

technical field [0001] The invention belongs to the technical field of metal material preparation, and specifically relates to making Cr blocks and Mo blocks into intermediate alloys, and the alloys are processed into CrMo alloy powders by grinding and crushing machines under the protection of low-temperature liquids, and CrMo alloy powders are produced to replace Cr and Mo alloy powders. A method for preparing CuCrMo electrical contacts by mixing powders. Background technique [0002] The advantage of the Cu-Cr alloy contact material stems from the small mutual solubility between Cu and Cr. Cu-Cr alloy is actually a pseudo-alloy of two-phase structure, so that both Cu and Cr fully retain their good properties. The Cu component with a lower melting point, high electrical conductivity and thermal conductivity is beneficial to improve the breaking capacity of the vacuum switch; on the other hand, the Cr component has a higher melting point, mechanical strength and lower cut-o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/16H01H1/025
Inventor 王文斌苗柏和王小军李刚梁建奇
Owner SHAANXI SIRUI ADVANCED MATERIALS CO LTD
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