【摘 要】
：
In order to research the influence of La2O3 on crystallization behavior of free-fluoride mould flux and the heat transfer of slag film,flee-fluoride mould flux
【机 构】
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Materials and Metallurgy School,Technology and Quality Department of Baotou Iron and Steel Co.
论文部分内容阅读
In order to research the influence of La2O3 on crystallization behavior of free-fluoride mould flux and the heat transfer of slag film,flee-fluoride mould flux with various La2O3 content were investigated by using self-made mould simulator, comprehensive thermal analyzer and SEM-EDS. With the increase of La2O3 content from 0% to 20%, the crystallization ratios of mould flux films were improved from 2% to 90% and the thicknesses of films were also enhanced over two times. Moreover, crystallization temperature was greatly raised and its increasing extent reached 100 ℃. It could also decrease the melting temperature of casting powder about 50 ℃. However, the undissolved La2O3 particles appeared in slag film if the ratio of La2O3 in flee-fluoride mould flux was much too high.
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