高压时效处理后铜合金的组织与热物理性能  

Microstructure and Thermal Physical Properties of Copper Alloy after High Pressure Aging Treatment

作　　者：肖莹[1,2] 刘建华 XIAO Ying;LIU Jianhua(School of Electrical Engineering, Yanshan University, Qinhuangdao 066004, China;School of Materials Science and Engineering, Yan Shan University, Qinhuangdao 066004, China)

机构地区：[1]燕山大学电气工程学院,河北秦皇岛066004 [2]燕山大学材料科学与工程学院,河北秦皇岛066004

出　　处：《铸造技术》2018年第6期1349-1351,1363,共4页Foundry Technology

摘　　要：利用金相显微镜、扫描电镜、透射电镜、热常数测试仪和膨胀仪,测试分析了高压时效处理后铜合金的组织与热物理性能。结果表明,高压时效铜合金组织较致密且析出相弥散细小,高压时效铜合金的热扩散系数随着加热温度的升高先升高后降低,当加热温度为300℃时出现高峰值,其热膨胀系数随着加热温度的升高增大幅度较平缓,其值大于常压时效铜合金的热膨胀系数。The microstructure and thermal physical properties of copper alloy after high pressure aging treatment were measured and analyzed by means of optical microscopy, scanning electron microscopy, transmission electron microscopy, thermal constant tester and thermal expansion instrument. The results show that the microstructure of high pressure aging copper alloy is more compact, and cause more dispersive distribution of finer precipitate phase in the matrix, its thermal diffusivity coefficient increases first and then decreases with the increase of heating temperature, the thermal diffusivity coefficient presents a high peak at 300 ℃. Its thermal expansion coefficient increases slowly with the increase of heating temperature, and its value is greater than the thermal expansion coefficient of the copper alloy after normal pressure aging treatment.

关 键 词：铜合金 高压时效处理 组织 热扩散系数 热膨胀系数 

分 类 号：TG156[金属学及工艺—热处理] TG113[金属学及工艺—金属学]