Influence of crucible material on inclusions in 95Cr saw-wire steel deoxidized by Si–Mn  

作　　者：Yang Li Chang-yong Chen Guo-qing Qin Zhou-hua Jiang Meng Sun Kui Chen 

机构地区：[1]School of Metallurgy,Northeasten University,Shenyang 110819,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2020年第8期1083-1099,共17页矿物冶金与材料学报（英文版）

基　　金：support from the National Key Research and Development Program of China(No.2016YFB0300105);the Transformation Project of Major Scientific and Technological Achievements in Shenyang(No.Z17-5-003);the Fundamental Research Funds for the Central Universities(No.N172507002)。

摘　　要：To investigate the interaction mechanism between 95 Cr saw-wire steel and different refractories,we conducted laboratory experiments at 1873 K.Five crucible materials(SiO2,Al2 O3,MgO·Al2 O3,MgO,and MgO-CaO)were used.The results indicate that SiO2,Al2 O3,and MgO·Al2 O3 are not suitable for smelting low-oxygen,low-[Al]s 95 Cr saw-wire steel,mainly because they react with the elements in the molten steel and pollute the steel samples.By contrast,MgO-CaO is an ideal choice to produce 95 Cr saw-wire steel.It offers three advantages:(ⅰ)It does not decompose by itself at the steelmaking temperature of 1873 K because it exhibits good thermal stability;(ⅱ)[C],[Si],and[Mn]in molten steel cannot react with it to increase the[O]content;and(ⅲ)it not only desulfurizes and dephosphorizes but also removes Al2 O3 inclusions from the steel simultaneously.As a result,the contents of the main elements([C],[Si],[Mn],[Cr],N,T.O(total oxygen))in the steel are not affected and the content of impurity elements([Al]s,P,and S)can be perfectly controlled within the target range.Furthermore,the number and size of inclusions in the steel samples decrease sharply when the MgO-CaO crucible is used.

关 键 词：nonmetallic inclusions 95Cr saw-wire steel crucible material MgO–CaO refractory 

分 类 号：TF76[冶金工程—钢铁冶金] TQ175.1[化学工程—硅酸盐工业]