直流电流对Cu-0.33Cr-0.06Zr合金导电性的影响  

Influence of Direct Current Intensity on Electrical Conductivity of Aged Cu-0.33Cr-0.06Zr Alloy

作　　者：白宁[1,2] 张彦敏[1,2,3] 汪美珍 宋克兴[1,2,3] 乔艳艳[1,2] 

机构地区：[1]河南科技大学材料科学与工程学院 [2]河南省有色金属材料科学与加工技术重点实验室 [3]有色金属共性技术河南省协同创新中心 [4]正泰电气股份有限公司高压开关事业部

出　　处：《特种铸造及有色合金》2014年第5期556-558,共3页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51075122);河南省杰出人才资助项目(134200510011);河南省科技攻关资助项目(112102210177);教育部创新团队发展计划资助项目(ITR1234)

摘　　要：对Cu-0.33Cr-0.06Zr合金在450℃下进行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合金时效后电导率的影响。结果表明,在相同时效温度与时间的条件下,合金在电流密度为100A·cm-2的合金电导率低于无电流时效的;而电流密度为400A·cm-2的合金电导率高于无电流时效的。随着电流密度增加,合金的电导率有先下降再上升的趋势。在电流密度为400A·cm-2下时效2h后合金的电导率达到49.53 MS/m,与无电流时效6h相当。说明较大密度的直流电流可以加速溶质元素的析出,大大提高析出效率。Cu-0. 33Cr-0.06Zr alloy was treated by solid solution treatment, cold deformation and aged with different aging time and different current intensities at 450℃ to understand the effects of different DC current intensities on electric conductivity of the alloy aged. The results show that compared with the alloy aged without DC current, the electric conductivity of the alloy aged with 100 A/cm2 DC current is lower, while the one aged with 400 A/cm2 DC current is higher with a fixed aging temperature and time. The electric conductivity of the alloy aged is firstly decreased and then increased with the increase of current intensity at a given aging time. With 400 A/cm2 DC current, the electrical conductivity of al- loy with aged for 2 hours is increased to 49.53 MS/m, equivalent to the alloy aged 6 hours without DC current. The results reveal that high current intensity can promote the precipitation of solute element and improve the efficiency of precipitation greatly, which are attributed to co-action of the Joule heating and electron wind force to vacancies and dislocation.

关 键 词：Cu—Cr-Zr合金 直流电流 电流密度 时效 电导率 

分 类 号：TG166.2[金属学及工艺—热处理]