刘祥,倪自飞,姚利丽,薛烽,严木香,底华芳

• 1:江苏兴达钢帘线股份有限公司
• 2:江苏省结构与功能复合材料重点实验室
• 3:东南大学材料科学与工程学院

摘要(Abstract)：

观察并研究了过共析珠光体钢丝在冷拉过程中的显微组织变化,并通过背散射电子衍射技术(EBSD)测试了变形过程中(应变量为0、0.54、1.58、2.29)过共析珠光体钢丝织构的变化。结果表明,过共析钢中渗碳体表现出良好的变形能力。随着应变量的增加,渗碳体片层经弯曲、剪切、拉伸等变形逐渐转向拉拔方向,最后形成平行于拉拔方向的纤维状组织。冷变形还引起了渗碳体部分溶解,定量测试表明渗碳体的溶解量随着应变量的增加而增加。由于溶解后的碳原子进入到铁素体晶格中,使得铁素体晶格点阵常数变大,其衍射峰随应变量的增加而产生微小左移。拉拔后的织构取向以平行于拉拔方向的<110>丝织构为主,且织构强度随着拉拔应变量增加而逐渐增强。

关键词(KeyWords)： 冷变形;过共析钢丝;微观组织;渗碳体溶解;织构

Abstract:

Keywords:

基金项目(Foundation): 江苏省自然科学基金青年基金(BK20140584);; 江苏省博士后科研资助计划(1201082C);江苏省博士后科研资助计划(1401075C)

作者(Author): 刘祥,倪自飞,姚利丽,薛烽,严木香,底华芳

DOI: 10.13289/j.issn.1009-6264.2015.08.032

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