理化检验-物理分册2025，Vol.61Issue(6)：36-40,5.DOI:10.11973/lhjy-wl240115
某储气罐角焊缝开裂原因
Reason for cracking of fillet weld in a certain gas storage tank
张丛敏1
作者信息
- 1. 湖北特种设备检验检测研究院宜昌分院,宜昌 443000
- 折叠
摘要
Abstract
A company's gas storage tank experienced a cracking and leakage accident after less than 1 year of use.The causes of cracking in gas storage tanks were analyzed using macroscopic observation,chemical composition analysis,scanning electron microscopy and energy spectrum analysis,metallographic examination.The results show that the leakage point was located at the fillet weld between the inlet pipe of the gas storage tank and the cylinder.Due to excessive welding heat input,the base material on the pipe side was severely overheated,and the microstructure transformed into a Widmannstatten structure,resulted in insufficient toughness of the corner weld joint.Under the joint action of welding residual stress and working stress,microcracks were initiated near the fusion line of the weld,and the cracks preferentially extended in the heat affected zone,ultimately led to brittle cracking of the gas storage tank weld.关键词
储气罐/角焊缝/热输入/魏氏组织/脆性开裂Key words
gas storage tank/fillet weld/heat input/Widmannstatten structure/brittle cracking分类
通用工业技术引用本文复制引用
张丛敏..某储气罐角焊缝开裂原因[J].理化检验-物理分册,2025,61(6):36-40,5.
