张毅,柴哲,许倩倩,田保红,刘勇,刘平

• 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
• 3:上海理工大学材料科学与工程学院

摘要(Abstract)：

采用Gleeble-1500D热模拟试验机,研究了Cu-0.8Cr-0.3Zr合金在变形温度为650~950℃、应变速率为0.001~10 s-1、总压缩应变量60%条件下的流变行为,对热变形过程中的组织演变和动态再结晶机制进行了分析,同时分析了该合金的热加工图。结果表明,变形温度越高,应变速率越小,合金越容易发生动态再结晶,且对应的峰值应力也越小。利用逐步回归的方法建立该合金的流变应力方程。绘制了Cu-Cr-Zr合金的热加工图,确定了其热加工时的安全区与失稳区,得出了该合金在实验参数范围内热变形过程的最佳工艺参数:温度范围为850~900℃,应变速率范围为0.1~1 s-1。

关键词(KeyWords)： Cu-Cr-Zr合金;热压缩变形;流变应力方程;热加工图

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(2012GGJS073);; 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): 张毅,柴哲,许倩倩,田保红,刘勇,刘平

DOI: 10.13289/j.issn.1009-6264.2015.11.002

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