連続鋳造における冷却条件と引抜き速度の改良計算法
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概要
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In the analysis of the solidification process of continuous casting operation, the estimation of modified Fourier number, H_2=αL/uW^2, which determines the quantitative relations between the length of the cooling zone and thermal diffusivity, thickness and withdrawal rate of the ingot, has been facilitated by the adoption of the integral-profile method. The calculus for continuous casting presented in previous paper by considering the completion of freezing of metals at the end point of the spray cooling zone has been improved and developed to the new calculus, in which the complete solidification at the position of pinch rolls was taken into account and another dimensionless factor, H_3=αLp/uW^2 was introduced. The values of H_2, min and H_3, min derived theoretically in this work may be used as the standard ones in decision of the length of cooling zone and the operating conditions. The values of residence time in cooling zone calculated for three kinds of steels under various cooling conditions have been in good agreement with the estimated values which were presented in other papers, hitherto.
- 1969-07-01
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