邱俊锋,陆春祥,林田子,曹建春,詹放,高鹏

• 1:昆明理工大学材料科学与工程学院
• 2:攀钢集团研究院有限公司钒钛资源综合利用国家重点实验室
• 3:鞍钢集团钢铁研究院
• 4:南京钢铁有限公司

摘要(Abstract)：

采用光学显微镜(OM)、扫描电镜(SEM)、透射电镜(TEM)和拉伸试验等研究了不同温度回火后690 MPa级高强抗震耐火钢板的微观组织、复合析出相形态、拉伸断口形貌和力学性能。结果表明：热轧态试验钢具有较高的强度，但其抗震性和塑韧性较差；随着回火温度的升高，试验钢的强度呈现先增后降的趋势；300℃回火后，试验钢具有优异的综合力学性能，组织主要为回火马氏体+铁素体+贝氏体，同时有大量细小的含Nb、V、Ti、Mo的复合析出相弥散分布于基体中，析出相颗粒的平均尺寸为40.5 nm,这种细小析出相在高温时不易粗化，能够减缓高温强度损失，此时其-40℃冲击吸收能量达到最大值，为171 J。

关键词(KeyWords)： 690 MPa级高强抗震耐火钢;热轧态;回火温度;组织;复合析出相

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目(2017YFB0304701)

作者(Author): 邱俊锋,陆春祥,林田子,曹建春,詹放,高鹏

DOI: 10.13289/j.issn.1009-6264.2021-0612

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