VD精炼工艺对GCr15钢中总氧及Als含量的影响

Influences of VD refining process on total oxygen content andAls content in GCr15 steel

摘要: 在杭钢VD精炼炉工业化实验的基础上研究了VD处理过程炉渣组元对GCr15钢中Als的影响,以及VD真空时间和真空度对GCr15钢中总氧的影响.实验结果表明,在2.5~4.5的碱度范围内,随着碱度的升高,VD过程钢中的Als烧损减少,但渣中CaO被还原的趋势增加.随着真空处理时间延长,钢材中的总氧含量先迅速降低,16min后趋于平稳.当真空度大于67Pa时,钢中总氧量随真空度的降低而降低,但在真空度小于67Pa后,降低真空度,钢中总氧含量反而上升.

Abstract: Based on the industrial experiments of VD treatment at HZSteel, the effect of slag onAls was studied as well as the effects of vacuum holding time and vacuum degree on the total oxygen content. The results show that the higher the basicity, the less theAls reduction in the steel in the basicity range of 2.5~4.5, while the reduction trend of CaO is increased;The longer the vacuum processing, the lower the total oxygen content in the steel, but not obviously decreases after 16 min;When vacuum is more than 67 Pa, the total oxygen content in steel drops with the decrease of the vacuum;However, when vacuum is less than 67 Pa, the total oxygen content in steel rises instead of decreases.