冷轧Q355钢窄带焊缝断裂的原因
Cause for Weld Fracture of Cold-rolled Q355 Steel Narrow Strip
常智慧 1杨宁 1赵帅1
作者信息
- 1. 山西建龙实业有限公司实业有限公司,山西 运城 043801
- 折叠
摘要
Q355 钢窄带冷轧时焊缝处断裂.对断裂的窄带进行了化学成分分析、金相检验和杯突试验.结果表明:焊缝组织为粗大的马氏体,与母材交界处有孔洞,而且焊缝两侧有明显的咬边缺陷,从而导致其在冷轧过程中断裂.
Abstract
Q355 steel narrow strip fractured at welding seam during cold-rolling.The fractured narrow strip was subjected to chemical composition analysis,metallographic examination and cupping test.The results showed that the welding seam exhibited coarse martensitie,and voids at the junction between it and base metal,and the evident undercut defect exited in both sides of the weld,thus resulting in its fracturing during cold-rolling.
关键词
Q355钢/冷轧带钢/断裂/微观组织Key words
Q355 steel/cold-rolled steel strip/fracturing/microstructure引用本文复制引用
出版年
2024
NETL
NSTL
万方数据