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

作　　者：刘泳 张雲飞 赵英利 赵楠 赵峥嵘 樊明强 田志强 LiuYong;Zhang Yunfei;Zhao YingLi;Zhao Nan;Zhao Zhengrong;Fan Mingqiang;Tian Zhiqiang(Special Materials Research and Development Center,Material Technology Research Institute of HBIS Group,Shijiazhuang,052165 China)

机构地区：[1]河钢材料技术研究院特种材料研发中心,石家庄052165

出　　处：《特殊钢》2024年第5期47-52,共6页Special Steel

基　　金：河北省自然科学基金自助项目[氢基直接还原及其系统CO_(2)脱除利用应用研究与示范(E2021318022)]。

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27.93μm下降到23.65μm,夹杂物数密度从256个/cm^(2),下降到176个/cm^(2),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。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 improvement 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 decreased from 27.93μm to 23.65μm before optimization.The number density of inclusions decreased from 256/cm^(2)to 176/cm^(2),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 

分 类 号：TF769.2[冶金工程—钢铁冶金] TF769.4