VD精炼工艺对GCr15钢中总氧及[Al]s含量的影响

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[Al]s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[Al]s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.

Influences of VD refining process on total oxygen content and[Al]s content in GCr15 steel

Based on the industrial experiments of VD treatment at HZSteel, the effect of slag on[Al]s 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 the[Al]s 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.