Abstract：On the basis of actual production data in the first steelmaking plant of FuSteel， the objective is to improve cleanliness indexes，including the inclusion and oxygen mass fraction of automobile gear steel 8620RH. Morphology and composition of inclusion in liquid steel were analyzed at 4 periods of the steelmaking process，namely initial stages of LF，the End of LF，before VD treatment and after soft blowing by using SEM. And the evolution process of inclusion in liquid steel was definite. Through decreasing the end of oxygen mass fraction of UHP，analyzing the slag composition of LF，strengthening the white slag operation of LF and controlling the soft blowing effect after VD，for automobile gear steel 8620RH，the average oxygen mass fraction can reach to 0.001 17%，B thin series rating of inclusions is no more than 1.5 and B coarse series rating of inclusions is less than or equal to 0.5.
收稿日期: 2016-01-19
出版日期: 2016-09-12
通讯作者:
安杰
E-mail: anjie0131@163.com
引用本文:
安杰，王哲，李润霞，李涛，丁克振，李如. 汽车齿轮钢8620RH的洁净度[J]. 中国冶金, 2016, 26(9): 33-37.
AN Jie，WANG Zhe，LI Run-xia，LI Tao，DING Ke-zhen，LI Ru. Cleanliness of automobile gear steel 8620RH. China Metallurgy, 2016, 26(9): 33-37.
2016, Vol. 26 
