电焊机2018，Vol.48Issue(1)：28-31,4.DOI:10.7512/j.issn.1001-2303.2018.01.07
超超临界锅炉过热器连通管焊接接头开裂原因分析与处理
Analysis and treatment of welding joint cracking of ultra supercritical boiler superheater pipe
陈明 1王文涛 1董鹏 1马艳丽2
作者信息
- 1. 华电电力科学研究院,浙江杭州310030
- 2. 中国能源建设集团山西电力建设第一有限公司,山西大同037008
- 折叠
摘要
Abstract
In view of welding process,joint condition,crack shape,and facility structure,analyzes the causes for cracking of weld joints of connecting pipes from low-temperature superheater to pendant superheater at a power plant in operation.The results show that weld joints are exposed to stress concentration with coarse HAZ grains while various stresses overlap to create peak stress within the sensitive temperature of reheat cracking.Thus,the peak stress leads to loosening stress and results in cracking.To avoid such problems,a few effective repair procedures and preventive countermeasures are proposed,providing reference for enterprises to prevent and control similar problems.关键词
珠光体钢/再热裂纹/连通管/过热器Key words
12Cr1MoVG steel/reheat cracking/connecting pipes/superheater分类
矿业与冶金引用本文复制引用
陈明,王文涛,董鹏,马艳丽..超超临界锅炉过热器连通管焊接接头开裂原因分析与处理[J].电焊机,2018,48(1):28-31,4.
