晏井利,梅建平,王仕勤,黄金督

• 1:江苏省先进金属材料高技术研究重点实验室
• 2:东南大学材料科学与工程学院

摘要(Abstract)：

为研究T91钢在高温及应力共同作用下的老化行为,对T91钢在800℃、0~36 MPa应力条件下时效过程中组织和性能的演化进行了研究。结果表明,时效过程中回火马氏体的板条组织特征逐渐消失,晶内和晶界的碳化物数量逐渐减少但尺寸逐渐增大,时效1656 h后的晶界碳化物颗粒尺寸达到4μm。抗拉强度、屈服强度和断后伸长率都随时效时间延长而降低,时效时间达到1656 h时,其抗拉强度为580 MPa,比初始抗拉强度值降低了15%。应力显著促进了T91钢显微组织老化和性能劣化的过程。

关键词(KeyWords)： T91钢;应力;时效;组织;性能

Abstract:

Keywords:

基金项目(Foundation): 江苏省先进金属材料高技术研究重点实验室开放基金(AMM201104)

作者(Author): 晏井利,梅建平,王仕勤,黄金督

DOI: 10.13289/j.issn.1009-6264.2016.05.017

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