鋼の連続鋳造における凝固遷移層の発達に関する数値シミュレーション

概要

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The solid-liquid coexisting zone of a solidifying alloy was classified into three zones of q_2, q_1 and p by the fluidity of the interdendritic liquid. In the q_2 zone, primary crystals and liquid can flow concurrently, whereas in the q_1 zone only the interdendritic liquid can flow between the dendrites, and in the p zone the liquid is entrapped by the solids and cannot flow. In the present study, the progress of solid-liquid coexisting zones in continuous casting of carbon steels was investigated by numerical computation. Two dimensional heat transfer in a bloom continuous casting having 400mm×400mm cross section was calculated by using finite difference method. The effect of electromagnetic stirring on the extent of the solid-liquid coexisting zones was estimated by considering effective thermal conductivity in the liquid, q_2 and q_1 zones. Results obtained were considered to be effective for predicting the location of segregations, extent of equiaxed crystal zone and optimum timing for soft reduction technique in continuous casting process.
社団法人日本鉄鋼協会の論文
1990-05-01