直流电流时效对Cu-0.33Cr-0.06Zr合金显微硬度的影响  

Influence on Microhardness of Cu-0. 33Cr-0. 06Zr Alloy Aged Under Direct Current

作　　者：白宁[1,2] 张彦敏[1,2] 罗钧 王海艳 宋克兴[1,2] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023 [2]河南科技大学河南省有色金属材料科学与加工技术重点实验室,河南洛阳471023 [3]广州铜材厂有限公司,广东广州510990 [4]广东省工业技术研究院金属加工与成型技术研究所,广东广州510650

出　　处：《河南科技大学学报（自然科学版）》2014年第3期5-7,4,共3页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金项目(51345011);河南省杰出人才基金项目(134200510011);河南省科技攻关基金项目(112102210177);教育部创新团队发展计划基金项目(ITR1234);广东省教育部产学研结合基金项目(2012B091100038);广州市产学研结合专项基金项目(122700016)

摘　　要：对Cu-0.33Cr-0.06Zr合金先固溶再冷变形,进行了450℃下不同时效时间及不同电流密度的时效试验。研究了不同电流密度对Cu-0.33Cr-0.06Zr合金时效后硬度的影响。研究结果表明:电流密度越大,合金到达硬度峰值的时间越短。合金在电流密度为400 A·cm-2下,时效0.25 h就到达峰值227HV。对比无电流下时效,大密度的直流电流在时效初期能大大提高合金的硬度,时效后期则会降低合金的硬度。Cu-0. 33Cr-0. 06Zr alloy was prepared by using the process of solution-treated,cold deformation and aging under direct electric current of different current densities. Different DC current densities were imposed during aging at 450 ℃ for different time. Influence of aging under different current densities on microhardness of Cu-0. 33Cr-0. 06Zr alloy was examined. The results show that with the increase of current density,the alloy reaches the peak hardness faster. With 400 A·cm- 2DC current,the microhardness of alloy aged for 0. 25hours is increased to 227HV. Microhardness of alloy is greatly improved at the early stage of aging and is reduced in the later stage of aging with DC electric of bigger current density.

关 键 词：Cu-0 33Cr-0 06Zr合金 直流电流 电流密度 时效 显微硬度 

分 类 号：TG146.11[一般工业技术—材料科学与工程] TG132.21[金属学及工艺—金属材料]