王成林,李伟,金学军

• 1:上海交通大学材料科学与工程学院

摘要(Abstract)：

研究了不同温度和时间的淬火-配分(Q-P)处理工艺对新型高硅(Si含量为0.82 mass%)热成形钢组织与力学性能的影响,采用光学显微镜(OM)和扫描电镜(SEM)对试样的微观组织进行了观察。结果表明,材料为板条马氏体+残留奥氏体组织,存在较多的M/A岛。当淬火温度为260℃,配分300 s时,材料的强塑积最高,达到22.3 GPa·%,且伸长率为13.3%,远高于商用热成形钢的6.6%。XRD和磁性法测得该处理条件下的残留奥氏体含量分别为5.2%和7.98%,透射电子显微镜(TEM)观察到薄膜状残留奥氏体。分析表明,淬火-配分处理后,保留至室温的富碳残留奥氏体对于提高材料的塑性起到了主要作用。

关键词(KeyWords)： 高硅;热成形钢;淬火-配分;残留奥氏体

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51174251);; 国家重点基础研究发展计划(2010CB630803)

作者(Author): 王成林,李伟,金学军

DOI: 10.13289/j.issn.1009-6264.2015.05.014

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