设备监理Issue(4)：24-28,5.DOI:10.19919/j.issn.2095-2465.2025.08.006
某新建锅炉12Cr1MoVG一级过热器爆管失效分析
Failure Analysis for Tube Explosion of 12Cr1MoVG First-stage Superheater of a Newly Built Boiler
李松山 1李中华 2方玉娟 3岳琳4
作者信息
- 1. 中电大别山(湖北)电力发展有限公司 黄冈 438304
- 2. 黄冈大别山第二发电有限责任公司 黄冈 438304
- 3. 陕西泰诺特检测技术有限公司 西安 710000
- 4. 国家能源集团乐东发电有限公司 乐东 572500
- 折叠
摘要
Abstract
Two months after a newly-built boiler was put into operation,a 12Cr1MoVG first-stage superheater tube burst accident occurred continuously.This paper uses the methods of appearance inspection,dimensional measurement,chemical composition analysis,tensile test,hardness test,metallographic examination and oxide scale thickness measurement to analyze the relevant tube.The results show that the oxide scale thickness,tensile strength and hardness in the blast tube section are all lower than the standard requirements,and the metallographic structure is severely spheroidized.In summary,the cause of the tube leakage of the first-stage superheater is long-term overheating.In the case of overheating,the metallographic structure is abnormally aging,the mechanical properties are reduced,and the thickness of the inner wall oxide scale causes the heat transfer to deteriorate further.When it reaches a certain level,the tube bursts under stress.The cause of long-term overheating is the poor circulation of the medium in the tube.关键词
过热器/12Cr1MoVG/爆管/长期过热Key words
Superheater/12Cr1MoVG/Tube bursts/Long-term overheating分类
通用工业技术引用本文复制引用
李松山,李中华,方玉娟,岳琳..某新建锅炉12Cr1MoVG一级过热器爆管失效分析[J].设备监理,2025,(4):24-28,5.
