| 某亚临界机组T23钢屏式过热器爆管原因分析 |
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| 引用本文： | 胥杨,陈文觉,马庆谦,陈乐. 某亚临界机组T23钢屏式过热器爆管原因分析[J]. 理化检验(物理分册), 2019, 55(7): 506-511 |
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| 作者姓名： | 胥杨 陈文觉 马庆谦 陈乐 |
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| 作者单位： | 上海市特种设备监督检验技术研究院,上海,200062;上海市特种设备监督检验技术研究院,上海,200062;上海市特种设备监督检验技术研究院,上海,200062;上海市特种设备监督检验技术研究院,上海,200062 |
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| 摘 要： | 某亚临界机组在停炉检修过程中发现T23钢屏式过热器发生了爆管事故,通过宏观观察、金相检验、扫描电镜分析、力学性能试验、化学成分分析等方法分析了爆管发生的原因。结果表明:机组超温运行,使过热器管道严重脱碳和过度氧化,降低了管子的表面强度和抗疲劳性能,从而导致该T23钢屏式过热器管在高温环境下发生了过载拉伸断裂,引发爆管。
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| 关 键 词： | 屏式过热器 T2 3 钢 爆管 超温运行 过载断裂 |
Cause Analysis on Tube Burst of T23 Steel Platen Superheater in a Subcritical Unit |
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| XU Yang,CHEN Wenjue,MA Qingqian,CHEN Le. Cause Analysis on Tube Burst of T23 Steel Platen Superheater in a Subcritical Unit[J]. Physical Testing and Chemical Analysis Part A:Physical Testing, 2019, 55(7): 506-511 |
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| Authors: | XU Yang CHEN Wenjue MA Qingqian CHEN Le |
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| Affiliation: | (Shanghai Institute of Special Equipment and Technical Research, Shanghai 200062, China) |
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| Abstract: | A tube burst accident of T23 steel platen superheater was found in a subcritical unit during shutdown and maintenance.The causes of tube burst were analyzed by means of macroscopic observation,metallographic examination,scanning electron microscopic analysis, mechanical property test and chemical composition analysis.The results show that the over-temperature operation of the unit resulted in serious decarbonization and over oxidation of the superheater tubes,which reduced the surface strength and fatigue resistance of the tubes.As a result,overload tensile fracture of the T23 steel platen superheater tubes occurred under high temperature environment,which led to tube burst. |
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| Keywords: | platen superheater T23 steel tube burst over-temperature operation overload fracture |
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