Effect of low-frequency rotary electromagnetic-field on solidification structure of continuous casting austenitic stainless steel |
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| Authors: | Shu-cai Zhou Chen-guang Bai Ya Lei Zheng-de Ren Peng-jun Cao and Zhi-li Yang |
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| Affiliation: | (1) College of Material Science and Engineering, Chongqing University, Chongqing, 400044, China;(2) College of Metallurgy and Material Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China |
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| Abstract: | To understand the solidification behavior of austenitic stainless steel in rotary electromagnetic-field, the influence of
low-frequency rotary electromagnetic-field on solidification structure of austenitic stainless steel in horizontal continuous
casting was investigated based on industrial experiments. The results show that the solidification structure of austenitic
stainless steel can be remarkably refined, the central porosity and shrinkage cavity can be remarkably decreased, and the
equiaxed grains zone are enlarged by means of application of appropriate low-frequency electromagnetic-field parameters. The
industrial trials verify that the stirring intensity of austenitic stainless steel should be higher compared with that of
plain carbon steel. Electromagnetic stirring affects the macrostructure even if the average magnetic flux density of the electromagnetic
stirring reaches 90 mT (amplitude reaches 141 mT) with the frequency of 3–4 Hz. Due to a higher viscosity, rotating speed
of molten stainless steel is 20%–30% lower than that of molten carbon steel in the same magnetic flux density.
Foundation item: Project(CSTC2007BB4216) supported by the Natural Science Foundation of Chongqing, China |
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| Keywords: | horizontal continuous casting austenitic stainless steel electromagnetic stirring equiaxed grains central porosity |
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