黄宽,张彦敏,周延军,杨冉,柳亚辉,郁炎,陈纪东,姜凯旋,刘东东

• 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实验室
• 4:中国船舶重工集团公司第七二五研究所

摘要(Abstract)：

利用Gleeble-1500D热力模拟机对Cu-15Ni-8Sn合金进行热压缩试验，研究了该合金在变形温度700～900℃,应变速率为0.003～5 s~(-1),总变形量为60%下的热变形行为和热加工性能。结果表明：合金的流变应力随变形程度的增加先急剧增加到最大值后持续下降，流变应力峰值随温度升高而降低，随应变速率增加而增加。基于合金流变应力曲线关系分别构建了耦合应变的修正的Arrhenius双曲正弦模型和热加工图，并得到合金热变形激活能为195976 J·mol~(-1),试验范围内Cu-15Ni-8Sn合金最佳热加工参数：变形温度800～900℃,应变速率0.003～5 s~(-1)。在较优工艺条件下，合金组织主要由动态再结晶晶粒和变形晶粒组成。

关键词(KeyWords)： Cu-15Ni-8Sn合金;热变形;本构方程;热加工图

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划(2021YFB3700700);; 国家自然科学基金(52173297,52071133);; 中原学者工作站资助项目(214400510028);; 河南省重点研发与推广专项(212102210441);; 河南省科学院科研开发专项(220910009)

作者(Author): 黄宽,张彦敏,周延军,杨冉,柳亚辉,郁炎,陈纪东,姜凯旋,刘东东

DOI: 10.13289/j.issn.1009-6264.2022-0336

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