冯江,田保红,张毅,刘勇,李全安

• 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

摘要(Abstract)：

采用真空热压烧结工艺成功制备WC体积分数为0、10%、20%的弥散铜-WC复合材料,分析了其显微组织和性能;并利用Gleeble-1500D热力模拟试验机,研究了该复合材料在变形温度为350~750℃,应变速率为0.01~5 s-1条件下的热变形行为。结果表明:复合材料的相对密度在95%以上,随着WC含量的增加,其导电率下降、硬度升高。弥散铜-WC复合材料高温流变应力-应变曲线主要以动态再结晶机制为特征,峰值应力随变形温度的降低或应变速率的升高而增加;高温变形条件下弥散铜-WC复合材料流变应力本构方程可以用双曲线正弦方程和Z参数描述;其热变形激活能分别为193.81,208.35和229.17 kJ/mol。

关键词(KeyWords)： 弥散铜-WC复合材料;性能;热变形;本构方程

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(51101052);; 河南高校科技创新团队支持计划(2012IRTSTHN008)

作者(Author): 冯江,田保红,张毅,刘勇,李全安

DOI: 10.13289/j.issn.1009-6264.2014.05.002

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