Cu-Cr-Zr合金的高温热变形行为  

Hot deformation behavior of Cu-Cr-Zr alloy

作　　者：丁宗业[1] 贾淑果[1,2,3] 宁向梅[1,2] 刘平[1] 赵培峰[1,2] 宋克兴[1,2] DING Zong-ye;JIA Shu-guo;NING Xiang-mei;LIU Ping;ZHAO Pei-feng;SONG Ke-xing(School of Materials Science and Engineering,Henan University of Science and Technology,Luoyang 471023,China;Henan Province Collaborative Innovation Center of Nonferrous Metals,Henan University of Science and Technology,Luoyang 471023,China;Henan Key Laboratory of Non-ferrous Materials Science and Processing Technology,Henan University of Science and Technology,Luoyang 471023,China)

机构地区：[1]河南科技大学材料科学与工程学院,洛阳471023 [2]河南科技大学河南省有色金属共性技术河南省协同创新中心,洛阳471023 [3]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,洛阳471023

出　　处：《中国有色金属学报》2020年第8期1811-1817,共7页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(50571035);国家重点研发计划资助项目(2017YFB0306405);河南省高校科技创新团队支持计划(14IRTSTHN007);长江学者和创新团队发展计划(IRT1234)。

摘　　要：利用Gleeble-1500型热模拟试验机对Cu-0.6Cr-0.03Zr合金进行高温热压缩变形,研究了合金在550~750℃变形温度、0.01~5 s-1应变速率条件下的热压缩变形行为,建立Cu-0.6Cr-0.03Zr合金的热变形本构方程及热加工图。结果表明:Cu-0.6Cr-0.03Zr合金的流变应力随变形温度的升高而减小,随应变速率的增大而增大;Cu-0.6Cr-0.03Zr合金的流变行为可用包含Zener-Hollomon参数的Arrhenius双曲正弦模型来描述,合金的热变形激活能为572.05 kJ/mol;Cu-0.6Cr-0.03Zr合金在高温热压缩变形时存在3个安全加工区,合金最佳热变形参数为变形温度770~800℃、应变速率0.01~0.05 s-1、功率耗散效率因子32%~40%。The deformation behavior of Cu-0.6Cr-0.03Zr alloy was investigated by compression test on Gleeble-1500 hot-simulation machine in the temperature range of 550-750 ℃ and the strain rate range of 0.01-5 s-1. The hot deformation constitutive equation and processing map were established. The results show that the flow stress decreases with increasing the deformation temperature and increases with increasing the strain rate. The flow stress behavior is expressed by hyperbolic sine equation containing Zener-Hollomon parameter, and the hot deformation activation energy is calculated as 572.05 kJ/mol under the present experimental condition. There are three safe processing zones for high temperature deformation of the alloy. The optimum domain for hot working occurs at 770-800 ℃ and 0.01-0.05 s-1, with the efficiency of power dissipation of 32%-40%.

关 键 词：CU-CR-ZR合金 热变形行为 本构方程 热加工图 

分 类 号：TG146.1[一般工业技术—材料科学与工程]