Cu-Cr-Zr合金热变形行为  

Study on Hot Deformation of Cu-Cr-Zr Alloy

作　　者：许倩倩[1] 张毅[1] 田保红[1] 刘勇[1] 李瑞卿[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003

出　　处：《上海有色金属》2014年第1期10-14,共5页Shanghai Nonferrous Metals

基　　金：国家自然科学基金(51101052);国家高新技术研究发展计划(863计划)资助项目(2006AA03Z528);河南省高等学校青年骨干教师资助计划(2012GGJS073);河南省教育厅自然科学研究计划(20118430013);河南省有色金属重点实验室基金(2011YSKF12);河南科技大学人才科研基金项目(09001414);河南科技大学青年科学基金(2011QN48)

摘　　要：在Gleeble-1500D热模拟试验机上,采用高温等温压缩试验,在变形温度650~850℃、应变速率0.001~10 s^(-1)和总压缩应变量50%的条件下,对Cu-Cr-Zr合金的流变应力行为进行研究.通过应力-应变曲线和显微组织图分析了合金在不同应变速率、不同应变温度下的变化规律.结果表明:应变速率和变形温度对合金再结晶影响较大,变形温度越高,合金越容易发生动态再结晶;应变速率越小,合金也同样容易发生动态再结晶,并且对应的峰值应力也越小.从流变应力、应变速率和温度的相关性,得出了该合金热压缩变形时的热变形激活能Q和流变应力方程.研究分析Cu-Cr-Zr合金的热加工性能,可为生产实践提供理论指导与借鉴.The flow stress behavior of Cu-Cr-Zr alloy during hot compression deformation was studied through making isothermal compression test at Gleeble-1500D thermal- mechanical simulator at the temperature from 650 ℃to 850 ℃, the strain rate from 0. 001 s-1 to 10 s ~ and under the maximum strain of 50%. The change of Cu-Cr-Zr alloy was observed under different deformation temperature and different strain rate, through flow stress-strain curve and microstructure graph. Test results show that the higher deformation temperature or the smaller strain rate is, the easier dynamic re-crystallization of the alloy will occur. At the same time, the corresponding peak stress value becomes smaller. Both the hot deformation activation energy Q and constitutive equation can be derived from the correlativity of flow stress, strain rate and temperature of this alloy. The study on Cu-Cr-Zr thermal processing figure can help analyze the thermal performance of Cu-Cr-Zr alloy, and it provides theoretical guidance and reference for production practice.

关 键 词：CU-CR-ZR合金 热模拟 流变应力 加工图 

分 类 号：TG146.11[一般工业技术—材料科学与工程] TG113.2[金属学及工艺—金属材料]