李瑞卿,田保红,张毅,许倩倩,刘勇

• 1:河南科技大学材料科学与工程学院
• 2:有色金属共性技术河南省协同创新中心

摘要(Abstract)：

利用Gleeble-1500D热模拟试验机对Cu-Cr-Zr和Cu-Cr-Zr-Y合金,进行高温等温压缩试验,研究了在变形温度为650~850℃、应变速率为0.001~10 s-1条件下两种合金的流变应力的变化规律,测定了真应力一应变曲线,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和本构方程,并利用光学显微镜分析了合金在热压缩过程中的组织演变及动态再结晶机制。结果表明:稀土元素Y的加入细化了微观组织,提高了Cu-Cr-Zr合金的动态再结晶体积分数,并且大幅降低了合金的热变形激活能Q,改善了其热加工性能。

关键词(KeyWords)： Y;Cu-Cr-Zr合金;热压缩变形;热变形激活能;动态再结晶;热加工性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51101052);; 河南省高等学校青年骨干教师资助计划(2012GGJS-073);; 河南省教育厅自然科学研究计划(2011B430013);; 河南科技大学青年科学基金(2011QN48)

作者(Author): 李瑞卿,田保红,张毅,许倩倩,刘勇

DOI: 10.13289/j.issn.1009-6264.2014.04.010

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