Microstructure and properties evolution of T92 steel used for boiler tube during internal pressure creep test

WANG Wei; TANG Liying; LI Wensheng; ZHOU Rongcan; ZHONG Wanli

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Microstructure and properties evolution of T92 steel used for boiler tube during internal pressure creep test

Thermal Power Generation Issue 8, (2016)

更新时间：2025-09-28

- Microstructure and properties evolution of T92 steel used for boiler tube during internal pressure creep test
- 作者机构：
  
  1. 广东电网有限责任公司电力科学研究院,广东,广州,510080
  2. 西安热工研究院有限公司电站锅炉煤清洁燃烧国家工程研究中心,陕西,西安,710032
- 作者简介：
- 基金信息：
- DOI：
  CLC： TB31
- Published Online：15 September 2016，
  
  Published：2016
- 稿件说明：
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WANG Wei, TANG Liying, LI Wensheng, et al. Microstructure and properties evolution of T92 steel used for boiler tube during internal pressure creep test[J]. Thermal Power Generation, 2016, (8).
DOI：

WANG Wei, TANG Liying, LI Wensheng, et al. Microstructure and properties evolution of T92 steel used for boiler tube during internal pressure creep test[J]. Thermal Power Generation, 2016, (8). DOI：

摘要

采用自行设计制造的内压蠕变试验系统

对T92钢管进行内压蠕变中断试验

试验条件为600 ℃、59 MPa内压(折算环向应力为130 MPa)

试验时间分别为5 000.0、12 776.5、18 659.5、24 042.5 h(爆破)；对内压蠕变T92钢管进行硬度、室温冲击和拉伸等力学性能测试；同时利用光学显微镜、扫描电镜、透射电镜对材料的微观组织进行了研究。结果表明:随着蠕变寿命消耗增加

T92钢管冲击吸收能量和硬度均在蠕变初期快速下降

随后下降速率明显趋缓

室温抗拉强度和规定塑性延伸强度则直线下降；分析认为T92钢管力学性能劣化的主要原因为Laves相的析出和快速粗化。室温抗拉强度、规定塑性延伸强度、马氏体板条宽度、Laves相的尺寸与蠕变寿命消耗紧密相关

故可作为T92钢老化状态评估的关键指标。

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