理化检验-物理分册2026，Vol.62Issue(6)：71-75,5.DOI:10.11973/lhjy-wl260015
60Si2Mn钢连铸坯表面裂纹产生原因
Cause of surface cracks in 60Si2Mn steel continuous casting billet
彭先锦 1徐尚呈 1杨娥 1谢毓敏1
作者信息
- 1. 大冶特殊钢有限公司,黄石 435001||高品质特殊钢湖北省重点实验室,黄石 435001
- 折叠
摘要
Abstract
A crack defect appeared on the surface of a continuous casting billet made of 60Si2Mn steel for a certain spring.The causes of surface cracks in continuous casting billets were analyzed using methods such as magnetic particle testing,chemical composition analysis,scanning electron microscopy and energy spectrum analysis,and metallographic examination.The results show that the surface cracks of 60Si2Mn steel continuous casting billet were mainly distributed at the corners of the billet,and the cracks were distributed along the ferrite grain boundaries.Point-like internal oxidation products could be seen at the edge of the cracks,block-like oxidation products and glassy protective slag could be seen inside the cracks.The taper design did not match the free shrinkage curve of the billet shell,and uneven stress was formed at the corner and face,which eventually led to cracking of the corner billet shell.关键词
弹簧/连铸坯/角部裂纹/点状内氧化产物/玻璃态保护渣Key words
spring/continuous casting billet/corner crack/point-like internal oxidation product/glassy protective slag分类
通用工业技术引用本文复制引用
彭先锦,徐尚呈,杨娥,谢毓敏..60Si2Mn钢连铸坯表面裂纹产生原因[J].理化检验-物理分册,2026,62(6):71-75,5.
