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首页> 外文期刊>Reliability Engineering & System Safety >Residual lifetime assessment of cold-reheater pipe in coal-fired power plant through accelerated degradation test
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Residual lifetime assessment of cold-reheater pipe in coal-fired power plant through accelerated degradation test

机译：通过加速老化试验评估燃煤电厂冷热管的剩余寿命

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摘要

Non-destructive testing (NDT) is the process of evaluating and inspecting materials without damage. The purpose of present study is to evaluate the residual lifetime of materials by proposing a new concept of nondestructive testing. The residual lifetime of service-exposed 1.25Cr-0.5Mo (P11) steel cold-reheater pipes in a coal-fired power plant, which were used for approximately 23 years at 310 degrees C, was investigated with accelerated degradation tests of a fresh P11 steel. The hardness and the microstructure of the P11 steel aged at 550 degrees C for 1000 h were similar to those of the service-exposed cold-reheater pipe. The creep-rupture tests of the steel aged at 550 degrees C for 1000 h were performed under various temperature and stress conditions together with the fresh steel. The creep-rupture properties analyzed using a Larson Miller parameter (LMP) approach suggested that the residual lifetime of the service-exposed pipes is approximately 53% at the current conditions. The proposed methodology is expected to serve as a useful tool to check the timing of materials replacement and to maintain safety in a coal-fired power plant.
机译：无损检测（NDT）是评估和检查材料而无损坏的过程。本研究的目的是通过提出一种新的无损检测概念来评估材料的剩余寿命。通过对新鲜的P11进行加速降解试验，研究了在310摄氏度下使用了约23年的燃煤电厂中1.25Cr-0.5Mo（P11）钢制再热器冷媒管道的剩余寿命。钢。在550℃时效1000 h时效的P11钢的硬度和显微组织与在维修中使用的冷热管相似。在各种温度和应力条件下，与新鲜钢一起在550℃时效1000 h进行了蠕变断裂试验。使用Larson Miller参数（LMP）方法分析的蠕变断裂特性表明，在当前条件下，服务暴露管道的剩余寿命约为53％。预期所提出的方法学将成为检查燃煤电厂材料更换时间和维持安全性的有用工具。

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  • 来源
    《Reliability Engineering & System Safety》 |2019年第8期|330-335|共6页
  • 作者

    Kim Myung-Yeon; Chu Dong-Ju; Lee Young-Kook; Shim Jae-Hyeok; Jung Woo-Sang;

  • 作者单位

    Korea Inst Sci & Technol, Ctr Energy Mat Res, Seoul 02792, South Korea|Yonsei Univ, Dept Mat Sci & Engn, Seoul 03722, South Korea;

    Korea Inst Sci & Technol, Ctr Energy Mat Res, Seoul 02792, South Korea|Korea Univ, Dept Mat Sci & Engn, Seoul 02841, South Korea;

    Yonsei Univ, Dept Mat Sci & Engn, Seoul 03722, South Korea;

    Korea Inst Sci & Technol, Ctr Energy Mat Res, Seoul 02792, South Korea;

    Korea Inst Sci & Technol, Ctr Energy Mat Res, Seoul 02792, South Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    1.25Cr-0.5Mo steel; Cold-reheater pipe; Creep; LMP; Residual lifetime;

    机译：1.25Cr-0.5Mo钢;冷热管;蠕变;LMP;剩余寿命;

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