NM500钢板冷弯断裂原因分析
Analysis of cold bending fracture of NM500 steel plate
陈以荟 1曾智中 1黎建东 1王世茹 1林森明1
作者信息
- 1. 广西盛隆冶金有限公司,广西防城港 538000
- 折叠
摘要
某厂厚度为10 mm的NM500钢板在冷弯试验过程中出现断裂.为研究其断裂原因,通过对弯曲试验断裂钢板与合格的钢板进行冷弯工艺参数、拉伸性能、显微组织及夹杂物类型、断口形貌、能谱检测对比综合分析其冷弯断裂原因.结果表明:钢中大尺寸的MnS和不规则形态、团聚的TiN夹杂物破坏了钢板连续性,在冷弯过程中出现微裂纹,随着应力增大微裂纹扩展,最终导致钢板冷弯断裂.
Abstract
Fracture occurred for a 10 mm NM500 steel plate in the cold bending test process.In order to study the cause of fracture,the bending test fracture steel plate and qualified steel plate were used for comprehensive analysis including cold bending process parameters,tensile properties,microstructure and inclusions type,fracture morphology,and energy spec-trum detection comparison.The results showed that the large size MnS inclusions and agglomerated TiN inclusions with ir-regular morphology destroyed the continuity of the steel plate,and the micro-cracks appeared in the cold bending process.With the increase of stress,the micro-cracks expanded and finally led to cold bending fracture of the steel plate.
关键词
NM500/冷弯断裂/MnS和TiN夹杂Key words
NM500/cold bending fracture/MnS and TiN inclusion引用本文复制引用
出版年
2024
NETL
NSTL
万方数据