丁宗业,贾淑果,李湘海,郭望望,王俊峰,刘平

• 1:河南科技大学材料科学与工程学院
• 2:河南省有色金属材料科学与加工技术重点实验室
• 3:中铝洛阳铜业有限公司

摘要(Abstract)：

利用Gleeble-1500热模拟实验机对非真空熔铸Cu-0.94Cr-0.34Zr合金进行高温热压缩变形,研究在变形温度为500～800℃、应变速率为0.01～1 s-1工作条件下该合金的流变应力行为,建立合金热变形流变应力本构方程及加工图。结果表明:流变应力随变形温度的升高而降低,随应变速率的降低而减小;可用包含Zener-Hollomon参数的Arrhenius双曲正弦关系式描述Cu-0.94Cr-0.34Zr合金的热变形行为,建立本构方程,算出其激活能为418.35 kJ/mol。依据动态材料模型,建立热加工图,确定热变形失稳区和安全热加工区域,合金最佳热加工条件为:变形温度775℃,应变速率0.01 s-1。

关键词(KeyWords)： Cu-0.94Cr-0.34Zr合金;流变应力;本构方程;加工图

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(50571035);; 河南省高校科技创新团队支持计划(2012IRTSTHN008);; 河南省高等学校青年骨干教师资助计划(09003047);; 河南科技大学科研创新培育基金(2010CZ0008)

作者(Author): 丁宗业,贾淑果,李湘海,郭望望,王俊峰,刘平

DOI: 10.13289/j.issn.1009-6264.2012.s2.016

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