改善模具钢洁净度与抛光性能的冶炼工艺实践
Smelting Process Practice to Improve the Cleanliness and Polishling Proptice of Die Steel
刘泳 1张雲飞 1赵英利 1赵楠 1赵峥嵘 1樊明强 1田志强1
作者信息
- 1. 河钢材料技术研究院特种材料研发中心,石家庄 052165
- 折叠
摘要
为解决模具钢H13镜面抛光效应较差的问题,通过冶炼工艺优化改进,改善模具钢的抛光效应.研究结果表明,镜面效应与钢的洁净度有密切对应关系.从电弧炉配料结构、脱氧制度、LF精炼炉吹氩控制、VD真空炉的高真空度周期优化,较全面地采取了改进措施,即电弧炉配料时采用增加DRI的使用量,采用硅预脱氧,优化钢包底吹氩控制和提高VD高真空度周期等措施.夹杂物有效尺寸从优化前的27.93 μm下降到23.65 μm,夹杂物数密度从256个/cm2,下降到176个/cm2,夹杂物数密度下降了31.2％,B类和DS类以及TiN类夹杂物总量上得到了控制,抛光性能的顾客满意度得到了一定的认可.
Abstract
In order to solve the problem of poor mirror polishing effect of steel used in plastic die,the polishing efficiency of die steel is improved by optimizing smelting process.The results showed that the mirror effect was closely related to the purity of steel.From the electric arc furnace burden structure,deoxidization system,LF refining furnace argon blowing control,high vacuum degree cycle of VD vacuum furnace and mold casting process optimization,more comprehensive im-provement measures were taken,that is,increasing the use of DRI,using silicon predeoxygenation,optimizing the argon blowing control of steel ladle bottom and improving the high vacuum cycle of VD.The effective size of inclusions de-creased from 27.93 μm to 23.65 μm before optimization.The number density of inclusions decreased from 256/cm2 to 176/cm2,and the number density of inclusions decreased by 31.2％.The total amount of B and DS and TiN inclusions was controlled,and the customer satisfaction of polishing performance was recognized.
关键词
模具钢H13/抛光性/氮含量/夹杂物/数密度Key words
Die steel H13/Polishing/Nitrogen Content/Inclusions/Number Density引用本文复制引用
出版年
2024
NETL
NSTL
万方数据