薛启明,田保红,李武会,田凯凯,周孟,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
• 3:河南省有色金属材料科学与加工技术重点实验室

摘要(Abstract)：

利用Gleeble-1500D型数控动态-力学模拟试验机，在550～950℃温度范围和0.001～10 s~(-1)应变速率条件下对Cu-2.5Sn-1.0Ti-0.25Cr合金进行了热变形试验，利用X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)以及光学显微镜等研究了Cu-2.5Sn-1.0Ti-0.25Cr合金的显微组织演变。建立了合金的本构方程并绘制了合金的热加工图。结果表明：Cu-2.5Sn-1.0Ti-0.25Cr合金的热变形激活能为283.473 kJ/mol,推荐的热加工参数为：变形温度850～950℃,应变速率0.08～0.4 s~(-1)。合金的流变应力随温度的降低而增大，随应变速率的提高而增大；高温低应变速率有利于促进合金的动态再结晶。

关键词(KeyWords)： Cu-2.5Sn-1.0Ti-0.25Cr合金;动态再结晶;热变形;本构方程;热加工图

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52071134);; 河南省科技计划项目(220910009);; 河南省高校科技创新团队支持计划(22IRTSTHN001);; 河南省科技攻关计划(212102210117)

作者(Author): 薛启明,田保红,李武会,田凯凯,周孟,刘勇

DOI: 10.13289/j.issn.1009-6264.2022-0375

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