理化检验-物理分册2024，Vol.60Issue(2)：67-71,5.DOI:10.11973/lhjy-wl202402018
12Cr1MoV钢过热器管开裂原因
Causes of cracking of 12Cr1MoV steel superheater tube
王晓东 1张继明 1胡显军1
作者信息
- 1. 江苏省(沙钢)钢铁研究院, 张家港 215625
- 折叠
摘要
Abstract
The 12Cr1MoV steel superheater tube in service of a company cracked in a short time.The fracture reasons were analyzed by means of macroscopic observation,chemical composition analysis,hardness test,hydrogen content analysis,scanning electron microscope analysis and metallographic examination.The results show that the defects were located on the inner wall of the steel tube after perforation rolling due to the original loose defects inside the tube blank.During the service process,the excessive hydrogen molecules in the boiler gas diffused into the pipe wall and enriched at the internal defects.There was a large residual stress in the elbow section of the heat pipe,which caused hydrogen-induced stress corrosion cracking at the defects,and finally led to superheater tube cracking.关键词
12Cr1MoV钢/氢致开裂/氢含量/二次裂纹/氧化圆点Key words
12Cr1MoV steel/hydrogen-induced cracking/hydrogen content/secondary crack/oxidized dot分类
通用工业技术引用本文复制引用
王晓东,张继明,胡显军..12Cr1MoV钢过热器管开裂原因[J].理化检验-物理分册,2024,60(2):67-71,5.
