杨景红,薛钢,蒋颖,王任甫

• 1:洛阳船舶材料研究所

摘要(Abstract)：

通过对一种785 MPa级低合金高强度船体钢Ac1附近临界区热处理试样的性能测试,研究了Ac1附近临界区处理对其性能及屈强比的影响,采用光学和透射电镜观察了试验钢的微观组织,分析了试验钢性能与微观组织结构的相关性。结果表明:Ac1附近临界区热处理改变了试验钢的微观组织结构,热处理后钢板组织为回火马氏体基体上分布细小马氏体/M-A组元、碳化物、少量残留奥氏体、细小弥散的纳米铜析出相;多元复相组织中的转变马氏体及残留奥氏体降低了试验钢的屈服点,提高了钢板的加工硬化率和均匀伸长率,降低了试验钢的屈强比;同时,细化的组织结构保证了材料的塑韧性。

关键词(KeyWords)： 热处理;低合金高强度钢;屈强比;加工硬化

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 杨景红,薛钢,蒋颖,王任甫

DOI: 10.13289/j.issn.1009-6264.2014.03.021

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