Effect of Low-frequency Electromagnetic-field on Macrostructure of Continuous Casting Austenitic Stainless Steel
ZHOU Shu-cai1, LEI Ya1, LI Hua-ji2, REN Zheng-de1, CAO Peng-jun1, YANG Zhi-li1
1. College of Metallurgy and Material Engineering, Chongqing University of Science and Technology, Chongqing, 400050, China; 2. College of Mechanical Engineering, Chongqing University, Chongqing, 400044, China
Abstract:The influence of low-frequency electromagnetic-field on macrostructure of austenite stainless steel in horizontal continuous casting was investigated based on industrial experiment.The results show that application of appropriate electromagnetic stirring parameters can improve the macrostructure of austenitic stainless steel,in which both columnar grains and equiaxed grains are evidently refined and center porosity and shrinkage cavity can be remarkably decreased,and enlarging equiaxed grains zone.The industrial trials verify that the stirring intensity of austenite stainless steel should be higher comparing with plain carbon steel.Electromagnetic stirring has somewhat affected the macrostructure of the austenitic stainless steel even if the the magnetic flux density of the electromagnetic stirring reaches average 90mT(amplitude reaches 141mT)in average at frequencyf=3-4Hz.Due to a higher viscosity,rotating speed of molten stainless steel was 20%-30% lower than that of molten carbon steel in the same magnetic flux density.
周书才, 雷亚, 李华基, 任正德, 曹鹏军, 杨治立. 低频电磁场对奥氏体不锈钢铸坯组织的影响[J]. 材料工程, 2008, 0(11): 32-35,40.
ZHOU Shu-cai, LEI Ya, LI Hua-ji, REN Zheng-de, CAO Peng-jun, YANG Zhi-li. Effect of Low-frequency Electromagnetic-field on Macrostructure of Continuous Casting Austenitic Stainless Steel. Journal of Materials Engineering, 2008, 0(11): 32-35,40.
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