Effect of Mg addition on equiaxed grain formation in Ti-stabilized ultra-purity ferritic stainless steel

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• 作者：CHEN ZhaopingXU YingtieGONG MaotaoTIAN Yuemei
• 会议时间：2013-06-01
• 关键词：ultra-purity ferritic stainless steel ; Mg addition ; inclusion ; equiaxed grain
• 作者单位：CHEN Zhaoping,XU Yingtie(Research Institute,Baoshan Iron & Steel Co.,Ltd.,Shanghai 201900,China)GONG Maotao,TIAN Yuemei(Research Institute,Baoshan Iron & Steel Co.,Ltd.,Shanghai 201900,China;State Key Laboratory of Metal Matrix Composite,Shanghai Jiao Tong University,Shanghai 200240,China)
• 母体文献：第五届宝钢学术年会论文集
• 会议名称：第五届宝钢学术年会
• 会议地点：上海
• 主办单位：中国金属学会
• 语种：chi

摘要

Effects of Mg addition on the solidification macrostructure of Ti-stabilized ultra-purity ferritic stainless steels was evaluated experimentally in order to obtain the fine equiaxed grains.Thermodynamic analysis on formation of complex inclusions by adding Mg was carried out combined with the SEM-EDS analysis.Equiaxed solidification was promoted by adding Mg,the proportions of equiaxed grain zone of 409L,4003,439 and 443NT stainless steel increased remarkably.Mg addition produces spinel oxide in the molten steel,which accelerate the TiN formation,and enhances columnar-to-equiaxed transition during the solidification.