金属热处理 ›› 2020, Vol. 45 ›› Issue (4): 60-62.DOI: 10.13251/j.issn.0254-6051.2020.04.012

• 组织与性能 • 上一篇    下一篇

高温服役后TP347HFG钢的组织与性能

宋涛1, 王志武2   

  1. 1. 湖北大学知行学院 机械与自动化学院, 湖北 武汉 430011;
    2. 武汉大学 动力与机械学院, 湖北 武汉 430072
  • 收稿日期:2019-09-25 出版日期:2020-04-25 发布日期:2020-05-08
  • 通讯作者: 王志武,教授,博士,E-mail:wzw1618@163.com
  • 作者简介:宋 涛(1989—),男,硕士,主要从事材料组织与性能研究,E-mail:songtao185880@163.com

Microstructure and properties of TP347HFG steel after high temperature service

Song Tao1, Wang Zhiwu2   

  1. 1. College of Machinery and Automation, Zhixing College of Hubei University, Wuhan Hubei 430011, China;
    2. School of Power and Mechanical Engineering, Wuhan University, Wuhan Hubei 430072, China
  • Received:2019-09-25 Online:2020-04-25 Published:2020-05-08

摘要: 利用金相显微镜、SEM、EDS和万能试验机分析了过热器管TP347HFG钢高温运行1.2×104 h和7.5×104 h后的组织与性能。结果表明,高温服役1.2×104 h和7.5×104 h后,TP347HFG钢仍保持明显的孪晶特征,析出的NbC有利于保持材料的组织稳定性。TP347HFG钢高温服役后力学性能能够保持稳定,随服役时间增加,强度增加而塑性变化不大。

关键词: TP347HFG钢, 高温服役, 组织, 析出相, 力学性能

Abstract: The microstructure and properties of superheater tube made of TP347HFG steel after running for 1.2×104 h and 7.5×104 h at high temperature was analyzed by means of metallographic microscope, SEM, EDS and universal testing machine. The results show that the TP347HFG steel after service for 1.2×104 h and 7.5×104 h at high temperature can still maintain obvious twin characteristics, the NbC precipitated is conducive to maintaining the structural stability of the material. The mechanical properties of the material can remain stable after service at high temperature, the strength increased with the serviced time extend while the plasticity changed little.

Key words: TP347HFG steel, high temperature service, microstructure, precipitates, mechanical properties

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