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

作　　者：郭发军 李祥才 崔建海 张智涛 GUO Fajun;LI Xiangcai;CUI Jianhai;ZHANG Zhitao(The Bar Research Institute of Qingdao Special Iron and Steel Co.,Ltd.,Qingdao 266409,China)

机构地区：[1]青岛特殊钢铁有限公司棒材研究所,山东青岛266400

出　　处：《山东冶金》2024年第4期10-12,共3页Shandong Metallurgy

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Aspex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。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 

分 类 号：TF762.5[冶金工程—钢铁冶金]