时效对熔铸CuCr25触头材料组织与性能的影响

朱建娟; 田保红; 刘平; 任凤章; 刘勇; 贾淑果

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时效对熔铸CuCr25触头材料组织与性能的影响
Effects of Aging on Microstructure and Properties of Atmospheric Casted CuCr2S Contact Materials
2006年第12期页码：814-816
纸质出版日期： 2006 ，
DOI：

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[1]朱建娟,田保红,刘平,任凤章,刘勇,贾淑果.时效对熔铸CuCr25触头材料组织与性能的影响[J].特种铸造及有色合金,2006(12):814-816+751.

Zhu Jianjuan, Tian Baohong, Liu Ping, et al. Effects of Aging on Microstructure and Properties of Atmospheric Casted CuCr2S Contact Materials[J]. Special Casting & Nonferrous Alloys, 2006,(12):814-816.
[1]朱建娟,田保红,刘平,任凤章,刘勇,贾淑果.时效对熔铸CuCr25触头材料组织与性能的影响[J].特种铸造及有色合金,2006(12):814-816+751. DOI：

Zhu Jianjuan, Tian Baohong, Liu Ping, et al. Effects of Aging on Microstructure and Properties of Atmospheric Casted CuCr2S Contact Materials[J]. Special Casting & Nonferrous Alloys, 2006,(12):814-816. DOI：

摘要

在中频感应炉中采用大气熔铸法制备了CuCr25合金触头材料

利用扫描电镜对其铸态、锻态以及固溶态的显微组织进行了分析

并测定了时效和变形量对电导率和显微硬度的影响。结果表明

CuCr25合金经锻造后可以获得均匀的组织分布;在950℃×1h固溶后

在440℃时效6h可获得较高的电导率和显微硬度;固溶后经40%冷变形

在440℃时效2h后

电导率和显微硬度HV分别可达33·1M·S/m和174

比固溶后直接时效分别高出5·8M·S/m和27。

Abstract

Microstructure of as-cast

forged and solid solution treated CuCr25 contact materials prepared by atmospheric casting in main frequency induction furnace have been observed by scanning electron microscope （SEM）

and effects of aging treatment and deformation rate on electric conductivity and micro-hardness of the contact materials have been examined. The results show that the Cr phase can be distributed uniformly into the forged CuCr25 alloy. The alloy exhibits higher electric conductivity and micro-hardness with aging at 440 ℃ for one hour after solid solution at 950 ’C for one hour

while the electric conductivity and micro-hardness of 40% cold deformed alloy can reach 33. 1 MS/m and 174

respectively

after solid solution treatment with aging at 440 *C for two hours

increased by 5. 8 MS/m and 27

respectively

compared with those of the alloy after solid solution treatment with direct aging.