Effect of oxygen content on the morphology of MnS inclusion in free cutting steel

摘要：

　　Effect of oxygen content on the morphology of MnS inclusion in free cutting steel is investigated.As oxygen content increases from 117 ppm to 220 ppm,the morphology of MnS inclusions evolves from Type II to Type I.Meanwhile the mean diameter of MnS inclusions becomes larger with the increase of oxygen content.The precipitation temperature of oxides (Mn,Fe)O calculated by thermo calc is higher than that of MnS inclusions.With the increase of oxygen content,iron content in (Mn,Fe)O increases which results in the decreased melting point of these oxides.It is suggested that (Mn,Fe)O with lower melting point may act as the heterogeneous nucleation sites for the precipitation of Type I MnS.

关键词： free cutting steel manganese sulfide inclusion morphology oxygen

作者: Yingying He Cheng Zhou Han Ma

作者单位: The Institute of Research of Iron & Steel,Shasteel,Zhangjiagang,215625,China

会议类型: 国际会议

会议名称: Asia Steel International conference 2012(第五届亚洲钢铁大会)

会议地点: 北京

会议语种:英文

页码: 1-6

在线出版日期: 2012-09-23（万方平台首次上网日期，不代表论文的发表时间）