真空ア-ク溶解におけるMnの蒸発挙動について (溶解・精練<特集>)
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概要
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Evaporation behavior of manganese from steel melt in the vacuum arc remelting was studied. The results obtained are as follows;(1) Evaporation behavior was well expressed by the equation, log[Mn]t/[Mn]o=-1/2.3KMn(22/vD2+62)where kMn, v and D are evaporation coefficient, melt rate and ingot diameter respectively.(2) At the starting period of remelting, manganese yield was lower than that obtained from the above equation.Uniform manganese distribution could be obtained by controlling the melting power.(3) Evaporation coefficient kMn, was dependent on the coexistence elements in steel and the increase of C. Cr and Ni decreased the kMn value.
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