丁国,黄丽颖,定巍,龚志华,王宝峰

• 1:内蒙古科技大学材料与冶金学院
• 2:邢台职业技术学院

摘要(Abstract)：

利用光学显微镜、透射电镜、X射线衍射和相变仪对热镀锌TRIP钢的微观组织进行了定性观察和定量计算,在此基础上对热镀锌TRIP钢残留奥氏体的演变规律和马氏体的精细结构进行了研究。定性观察表明热镀锌TRIP钢的微观组织由铁素体,贝氏体,残留奥氏体和马氏体构成,在贝氏体相变结束后的冷却过程中还存在马氏体相变;通过对微观组织计算发现,受贝氏体等温相变时间影响,热镀锌TRIP钢中的马氏体碳含量在0.80%~1.0%之间,贝氏体等温时间越长,最终组织中马氏体碳含量越高,Ms点越低;在贝氏体相变结束后,部分碳含量不高的奥氏体在随后的冷却过程中发生马氏体相变,以马-奥岛的形式存在,马氏体的精细结构以孪晶马氏体为主,存在少量位错马氏体。

关键词(KeyWords)： 热镀锌TRIP钢;微观组织;相变

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51304120);; 内蒙古自然科学基金(2012MS0803);; 内蒙古科技大学创新基金项目(2011NCL004)

作者(Author): 丁国,黄丽颖,定巍,龚志华,王宝峰

DOI: 10.13289/j.issn.1009-6264.2014.06.019

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