李晓博,景柯,周孟,田保红,刘勇,张启萌

• 1:河南科技大学材料科学与工程学院
• 2:有色金属新材料与先进加工技术省部共建协同创新中心
• 3:河南省有色金属材料科学与加工技术重点试验室
• 4:河南科技大学应用工程学院

摘要(Abstract)：

在变形温度为700～900℃、应变速率为0.003～10 s~(-1)和总变形量为55%的条件下，采用Gleeble-1500D型热模拟试验机对Cu-0.3Zr-0.2Cr-0.2Mg合金进行了热变形试验，绘制了其真应力-真应变曲线，建立了其本构方程和热加工图，分析了在不同热变形条件下合金的显微组织演变。结果表明：Cu-0.3Zr-0.2Cr-0.2Mg合金的热变形激活能为268.256 kJ/mol;在真应变分别为0.2、0.4和0.6时，合金的最佳热加工工艺范围分别为：变形温度为815～900℃和应变速率为0.015～0.819 s~(-1)、变形温度为785～900℃和应变速率为0.003～1.221 s~(-1)、变形温度为775～900℃和应变速率为0.003～1.822 s~(-1);温度和应变速率对Cu-0.3Zr-0.2Cr-0.2Mg合金的热变形组织演变具有重要影响，在高温和低应变速率下加工时，更有利于动态再结晶的发生，合理地控制热加工时的温度和变形速率是合金获得良好组织的关键。

关键词(KeyWords)： 铜合金;热变形试验;本构方程;热加工图;组织演变

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52071134);; 河南省自然科学基金(232300420089);; 河南省高校科技创新团队支持计划(22IRTSHN001)

作者(Author): 李晓博,景柯,周孟,田保红,刘勇,张启萌

DOI: 10.13289/j.issn.1009-6264.2024-0527

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