提高CrMn系弹簧钢夹杂物合格率的冶炼实践
Smelting Practice on Enhancing the Inclusion Percentage of Pass of CrMn Series Spring Bar
郭发军 1李祥才 1崔建海 1张智涛1
作者信息
- 1. 青岛特殊钢铁有限公司棒材研究所,山东 青岛 266400
- 折叠
摘要
在CrMn系弹簧钢生产过程发现部分炉次钢中B类或DS类夹杂物不合,检验合格率仅为98.5%～98.7%.运用As-pex技术、极值法对工艺流程(转炉→LF→RH→CC→铸坯→成品)所取试样对夹杂物进行了分析,找到了导致B类和DS类夹杂物超标的原因,并提出了具体的改进措施.生产表明,实施改进措施后,CrMn系弹簧钢夹杂物检验合格率提升到99.8%以上.
Abstract
The inclusion type B or DS of partial heat of CrMn series steel in the production didn't meet the requirements,the inspection percentage of pass was only 98.5%-98.7%.The reasons of the inclusion type B or DS exceeding the requirements of customer was found and the specific improvement measures were put forward after the inclusion was analysed by using the Aspex technique,extremum method for the specimen sampling from BOF→LF→RH→CC→billet→finished product.The production showed the inspection percentage of pass was enhanced to 99.8%above from the past 98.5%-98.7%after adopting the improvement measures.
关键词
CrMn系弹簧钢/夹杂物/Aspex技术/极值法/检验合格率Key words
CrMn series steel/inclusion/Aspex technique/extremum method/inspection percentage of pass引用本文复制引用
出版年
2024
NETL
NSTL
万方数据