王航,杨尚谕,韩礼红,张国君,任帅,于首明

• 1:石油管工程技术研究院
• 2:石油管材及装备材料服役行为与结构安全国家重点实验室
• 3:西安理工大学材料科学与工程学院

摘要(Abstract)：

采用拉伸试验、X射线衍射、光学显微镜和透射电镜等研究了一种13Cr超级马氏体不锈钢(00Cr13Ni6Mo2)的高温力学性能和高温时效后的力学性能、物相组成及显微组织。结果表明:00Cr13Ni6Mo2钢在高温下可保持较高的屈服强度,但当超过A_f(奥氏体转变完成点)温度后,屈服强度迅速下降;600℃时效后,马氏体基体中的位错密度明显降低,同时产生了一定量的逆变奥氏体,导致时效100 h后其屈服强度从824 MPa降至682 MPa(下降17.2%),而抗拉强度和伸长率变化不大;800℃时效过程中,试验钢的组织完全奥氏体化,在降温过程中组织转变为淬火马氏体,故其具有典型的淬火马氏体性能特征,时效100 h后抗拉强度从858 MPa升至1031 MPa(提高20.2%),同时伸长率从22.5%降至15.0%。

关键词(KeyWords)： 13Cr超级马氏体不锈钢;高温力学性能;高温时效;微观组织

Abstract:

Keywords:

基金项目(Foundation): 中石油集团科技开发项目(2016A-3905和2019B-4013);; 陕西省自然科学基金(2018JQ5135)

作者(Author): 王航,杨尚谕,韩礼红,张国君,任帅,于首明

DOI: 10.13289/j.issn.1009-6264.2019-0416

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