热作模具钢h13洁净度分析.pdf

热作模具钢H13洁净度分析刘建华1 包燕平1 阳燕1 高全德2 刘岩2 李永亮(,北京,100083;,安阳,455004) 摘要在EAF冶炼一LF精炼一VD处理一模铸一电渣重熔流程生产H13模具钢各阶段系统取样,通过全氧、氮、酸溶铝及夹杂物的综合分析,研究H13钢中洁净度的变化,探讨了进一步提高洁净度的技术措施。结果表明 H13钢生产过程中精炼渣碱度较低。钢中酸溶铝损失严重;LF和VD精炼渣对钢中AI:0。夹杂有明显的改性处理作用;模铸过程中二次氧化严重;电渣重熔发挥了良好的夹杂物去除作用。根据研究建议生产中提高精炼渣碱度和钢中铝含量。加强保护浇铸。关键词热作模具;H13;洁净度;精炼渣;碱度 LiuJian—hual, ( Cleanness investigation ofhot working die steel H1 3 Bao Yan--ping 1,Yang Yan 1,Gao Quan-de2,Liu Yan2,Li Yong—Lian92 Research Institute,University ofScience and Technology Beijing,Beijing 100083,China; Special Steel ,Henan,454685,China Abstract Cleanness ofdie steelH13。produced with EAF—LF—VD—ingot casting--electro-- slagrefining(ESR)procedure,was investigated bysystemic sampling invarious steps inthe pro— duction,and prehensive analysis oftotaloxygen,nitrogen,acid soluble aluminum and on the investigation,technical measures forcleanness improvement were dis— studies showed thatbasicity ofrefining slag was low,and theacidsoluble aluminum losswas serious;A12 03 inclusions were modified by refining slag inLF and VD refining;and the reoxidation during casting was much serious;however,ESR played a good roleininclusion re- suggested that casting protection should beimproved,and thebasicity and acidsolu— blealuminum content should beraised. Key words Hot working diesteel,H 3,Cle