基于热加工图的Cu-Ni-Si-P合金的高温热变形行为High temperature deformation behavior of Cu-Ni-Si-P alloy based on processing map
张毅,刘平,田保红,陈小红,贾淑果,刘勇,任凤章
摘要(Abstract):
在Gleeble-1500D热模拟试验机上,通过高温等温压缩试验,对Cu-2.0Ni-0.5Si-0.03P合金在应变速率为0.01~5 s-1、变形温度为600~800℃的动态再结晶行为以及组织转变进行了研究。结果表明:在应变温度为750、800℃时,合金热压缩变形流变应力出现了明显的峰值应力,表现为连续动态再结晶特征。同时从流变应力、应变速率和温度的相关性,得出了该合金高温热压缩变形时的热变形激活能(Q)为485.6 kJ/mol和热变形本构方程。根据动态材料模型计算并分析了该合金的热加工图,利用热加工图确定热变形的流变失稳区,并且获得了试验参数范围内热变形过程的最佳工艺参数,温度为750~800℃,应变速率范围为0.01~0.1 s-1,并利用热加工图分析了该合金不同区域的高温变性特征以及组织变化。
关键词(KeyWords): Cu-2.0Ni-0.5Si-0.03P合金;热加工图;动态再结晶;本构方程
基金项目(Foundation): 国家自然科学基金(51101052);; 国家高新技术研究发展计划(863计划)资助项目(2006AA03Z528);; 河南省教育厅自然科学研究计划(2011B430013);; 河南省有色金属重点实验室基金(2011YSKF12);; 河南科技大学人才科研基金项目(09001414)
作者(Author): 张毅,刘平,田保红,陈小红,贾淑果,刘勇,任凤章
DOI: 10.13289/j.issn.1009-6264.2012.11.008
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