Effect of low-frequency rotary electromagnetic-field on solidification structure of continuous casting austenitic stainless steel

来源期刊：中南大学学报(英文版)2009年第3期

论文作者：周书才 白晨光 雷亚 任正德 曹鹏军 杨治立

文章页码：360 - 364

Key words：horizontal continuous casting; austenitic stainless steel; electromagnetic stirring; equiaxed grains; central porosity

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.

基金信息：the Natural Science Foundation of Chongqing, China