摘要
为制备高性能铝锆耐热合金导体,首次采用ECAE动态时效成形工艺制备了Al-Zr-B合金导体.借助光学显微镜、材料拉伸试验机和双臂直流电桥等测试手段,研究了连续ECAE动态时效成形Al-Zr-B合金显微组织、力学性能和导电性能.结果表明:随着ECAE成形道次的增加,合金线材的组织逐渐趋于均匀;时效热处理可有效改善Al-Zr-B合金导线的力学性能和导电性能.随着时效时间的延长,合金的抗拉强度先升高,出现峰值强度,再延长时效时间,强度降低;伸长率随着时间延长一直降低,等效导电率则不断升高.当时效温度180℃、时效时间12h时,Al-0.3Zr-0.06B合金的拉伸强度为265.32MPa、伸长率为6.7%、等效导电率为59.54%IACS,Al-Zr耐热合金导线的综合性能较好.
In order to prepare high performance aluminum zirconium heat-resistant conductor,Al-Zr-B alloy conductor was prepared by continuous dynamic aging ECAE(Equal Channel Angular Extrusion)process.By means of OM,electronic tensile machine and double arm direct current bridge,the microstructure, mechanical properties and electrical properties of Al-Zr-B alloy prepared by continuous dynamic aging ECAE process were studied.The result shows that the microstructure of the alloy wires become homogeneous gradually with the increase of the ECAE forming passes;the mechanical and electrical properties of Al-Zr-B alloy wire can be effectively improved by using artificial aging treatment.The tensile strength of the alloy increases with the aging time prolonged firstly,when rises to the peak strength,after that the strength decreases with the aging time further prolong;the elongation of the alloy decreases all the time;however,the equivalent conductivity increases.When the alloys soaked 180℃for 12 h,the Al-Zr-B heat-resistant alloy wire has better complicated property,its tensile strength,elongation and the equivalent conductivity of the alloy is 265.32 MPa,6.7% and 59.54%IACS respectively.
出处
《沈阳大学学报（自然科学版）》
CAS
2016年第3期173-177,共5页
Journal of Shenyang University：Natural Science
基金
国家自然科学基金资助项目(51174139)
作者简介
周天国（1964-）,男,重庆云阳人,沈阳大学教授,博士后研究人员.
