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.780 北京科技大学学报 第29卷 304 stainless steel.I&SM.2001(8):93 降低其含量途径的研究，山西冶金，2000(2)：27 [⑧]甘志强.不锈钢夹杂物的成因及降低其含量的途径.江西冶 [IO]王贵平，范红军，尹嵬。太钢AOD精炼技术的发展。不锈， 金，1998,18(1)：9 2006(2):1 [9]郝瑞琴，裴廷振，杨淑菊.188型不锈钢夹杂物成因分析及 Origin of non metallic inclusions in OCr18Ni9 stainless steel FAN Guangwei,WANG Guiping,LI Zhibin Taiyuan Iron &Steel (Group)Co.Ltd..Taiyuan 030003.China ABSTRACT To research the major type of inclusions in stainless steel slabs and find out their primary origin. the composition of the non metallic inclusions was analyzed by SEM,and three tracer experiments were per formed by adding a tracer into AOD slag,ladle slag and tundish slag,respectively.The results show that the primary non metallic inclusions in OCr18Ni9 stainless steel slabs is CaO SiO2 Al2O3 Mgo system inclusions, the second is Mgo Al2O3 spinel and sulphide:the primary origin of the non metallic inclusions is the production of deoxidation and desulfuration during AOD reducing and the AOD slag suspension in the molten steel during tapping:after tapping,the molten steel is not obviously polluted by ladle slag,tundish covering flux and mold flux. KEY WORDS stainless steel;non metallic inclusions:AOD;slag:tracer304stainless steel．I＆SM2001（8）：93 ［8］ 甘志强．不锈钢夹杂物的成因及降低其含量的途径．江西冶 金199818（1）：9 ［9］ 郝瑞琴裴廷振杨淑菊．18－8型不锈钢夹杂物成因分析及 降低其含量途径的研究．山西冶金2000（2）：27 ［10］ 王贵平范红军尹嵬．太钢 AOD 精炼技术的发展．不锈 2006（2）：1 Origin of non-metallic inclusions in0Cr18Ni9stainless steel FA N GuangweiWA NG GuipingLI Zhibin Taiyuan Iron ＆ Steel （Group） Co．Ltd．Taiyuan030003China ABSTRACT To research the major type of inclusions in stainless steel slabs and find out their primary origin the composition of the non-metallic inclusions was analyzed by SEMand three tracer experiments were performed by adding a tracer into AOD slagladle slag and tundish slagrespectively．The results show that the primary non-metallic inclusions in0Cr18Ni9stainless steel slabs is CaO－SiO2－Al2O3－MgO system inclusions the second is MgO－Al2O3spinel and sulphide；the primary origin of the non-metallic inclusions is the production of deoxidation and desulfuration during AOD reducing and the AOD slag suspension in the molten steel during tapping；after tappingthe molten steel is not obviously polluted by ladle slagtundish covering flux and mold flux． KEY WORDS stainless steel；non-metallic inclusions；AOD；slag；tracer ·780· 北 京 科 技 大 学 学 报 第29卷