理化检验-物理分册2024，Vol.60Issue(8)：41-44,4.DOI:10.11973/lhjy-wl240103
Q355B直缝焊管开裂原因
Cracking reason of Q355B straight seam welded pipe
鞠芳1
作者信息
- 1. 凌源钢铁股份有限公司,朝阳 122504
- 折叠
摘要
Abstract
A company used Q355B hot rolled strip to make straight seam welded pipe.After welding,it was found that the weld area of some welded pipe cracked.The cracking reasons were researched by means of macroscopic observation,metallographic examination,scanning electron microscope and energy spectrum test.The results show that the sulfide content of the strip steel was high during melting,and the segregation of inclusions occured at the 1/4 thickness of the inner arc of the strip steel during continuous casting.The sulfide destroyed the continuity of the matrix,and the stress concentration occured at the micro-cracks,which eventually caused the cracking of the welded pipe.关键词
焊管/开裂/硫化物/偏聚/应力集中Key words
welded pipe/cracking/sulfide/segregation/stress concentration分类
矿业与冶金引用本文复制引用
鞠芳..Q355B直缝焊管开裂原因[J].理化检验-物理分册,2024,60(8):41-44,4.
