郭志强,熊毅,何红玉,卢艳君

• 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
• 3:广州民航职业技术学院飞机维修工程学院

摘要(Abstract)：

在650℃对原始组织为层片状珠光体的T8钢进行Bc路径的多道次等通道角挤压(ECAP)变形,借助SEM、TEM和AFM研究了变形过程中渗碳体片层的演变情况。结果表明:渗碳体片层表现出强烈的塑性变形能力,主要以剪切断裂、扭折、弯曲等变形方式来适应剧烈的塑性变形;四道次温变形后得到晶粒尺度均在亚微米量级的超微细复相组织(α+θ);球化完全的渗碳体颗粒粒径呈双峰分布,从三维的角度表征渗碳体的组织演变及其特性与从二维角度观察分析的结果相吻合。

关键词(KeyWords)： 等通道角挤压;渗碳体;组织演变;球化

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(50801021);; 河南科技大学人才科学研究基金资助项目(07003);; 河南省高等学校青年骨干教师资助项目(2011GGJS-070)

作者(Author): 郭志强,熊毅,何红玉,卢艳君

DOI: 10.13289/j.issn.1009-6264.2013.08.016

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