摘要
在真空感应炉中冶炼低碳高氧高硫易切削钢,其中氧含量的控制是一个难点。本文设计四种不同的冶炼方案,研究氧化铁皮的加入量、炉内真空度、合金加入顺序以及炉内保护气体种类等因素对钢液中氧含量的影响。结果表明,在真空度为0.1 MPa时,炉内气氛为5000 Pa氧气和96000 Pa氩气的混合气体,加入240 g氧化铁皮,同时石墨碳在合金化末期加入,钢锭中总氧含量达到250 ppm,收得率达到34.7%。实验通过合理控制合金化结束后的钢水保温时间,钢锭内部质量良好,无缩孔疏松。
It is difficult to increase the oxygen content in smelting free cutting steels by vacuum induction furnace.Four smelting schemes were designed in this paper to explore the effect of the amount of iron oxide,vacuum degree,adding sequence of alloys and protective gas in furnace on the oxygen content in molten steel.The results show that the total oxygen content in ingots can reach to 250ppm on the basis of low vacuum degree of 0.1MPa and the protection of gas mixed with 5000Pa oxygen and 96000Pa Ar.Carbon is added at the last stage of melting process,and the amount of the iron oxide is 240g.As a result,the oxygen yield rate comes up to 34.7％.With controlling the holding time after alloying,the internal quality of ingots can be improved.
出处
《真空》
CAS
2013年第5期45-48,共4页
Vacuum
关键词
真空感应冶炼
易切削钢
氧的收得率
vacuum induction smelting
free-cutting steels
oxygen yield rate
