摘要
采用等径角挤压(ECAP)技术对Cu-0.16Zr-0.04Si合金在室温和液氮低温下进行1道次变形,随后在450℃下时效4 h.通过扫描电子显微镜(SEM)和X射线能谱仪(EDS)等技术,研究时效对合金变形组织的影响,分析了合金力学性能和导电性能的变化.结果表明:合金在变形及时效后,晶界处出现不均匀分布的棒状或颗粒状析出相,基体中出现弥散分布的细小点状析出相;合金的抗拉强度和导电率在变形时效处理后得到同步提高;随着时效时间的延长,合金的断裂韧性逐渐变差.
Equal-channel angular pressing(ECAP)technique was employed to perform single-pass deformation of Cu-0.16Zr-0.04Si alloy at room temperature and liquid-nitrogen low temperature,and then the alloy was aged at 450℃for 4 h.The effect of aging on the microstructure of the alloy were investigated by scanning electron microscopy(SEM)and X-ray energy spectroscopy(EDS)and the alteration of mechanical properties and electrical conductivity of the alloy were analyzed.The result showed that after the alloy being deformed and aged,an ununiformity distributed rod-like or granular precipitated phase would appear at the grain boundary and a dispersively distributed fine point-like precipitated phase would appear in the matrix.The tensile strength and electrical conductivity of the alloy would be improved synchronously after deformation and aging treatment.With the aging time prolonged,the fracture toughness of the alloy would gradually deteriorate.
作者
郭廷彪
吴一博
魏士儒
王炳
马迪
贾智
GUO Ting-biao;WU Yi-bo;WEI Shi-ru;WANG Bing;MA Di;JIA Zhi(State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou Univ. of Tech., Lanzhou 730050, China;Key Laboratory of Nonferrous Metal Alloys and Processing, The Ministry of Education, Lanzhou Univ. of Tech., Lanzhou 730050, China)
出处
《兰州理工大学学报》
CAS
北大核心
2020年第2期1-6,共6页
Journal of Lanzhou University of Technology
基金
国家自然科学基金(51861022,51261016)。
关键词
铜合金
时效
析出相
强度
导电性
copper alloy
aging
precipitation phase
strength
electrical conductivity
