The evolution of non-metallic inclusions (> 10 μ m) for the Si-killed stainless steelmaking process is studied. The effects of the slag basicity in the AOD (argon oxygen decarburization) process, Ca treatment, refractory in the casting ladle, impurities (Ti, Al) in scraps and tapping temperature in the AOD process on the evolution of the non-metallic inclusions are investigated using the thermo-chemical program (FactSage TM ) and SEM analysis of the non-metallic inclusions at each process (AOD—ladle treatment—tundish—continuous casting). A new phase stability diagram of the non-metallic inclusion was developed from the analysis results, and we discuss the mechanism of the formation of spinel Mg[Al,Cr] 2 O 4 in the inclusion with the aid of the diagram.

中文翻译：

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非金属夹杂物在脱硅不锈钢冶炼中的演变

研究了硅镇静不锈钢制造过程中非金属夹杂物（> 10 μ m）的演变。AOD（氩氧脱碳）工艺中的渣碱度、Ca处理、浇包中的耐火材料、废料中的杂质（Ti、Al）和AOD工艺中的出钢温度对非金属夹杂物演化的影响为使用热化学程序 (FactSage TM ) 和 SEM 分析在每个过程（AOD-钢包处理-中间包-连铸）中对非金属夹杂物进行分析。根据分析结果绘制了新的非金属夹杂物相稳定性图，并借助该图讨论了夹杂物中尖晶石Mg[Al,Cr] 2 O 4 的形成机制。