| 摘要 |
<p>PURPOSE:To simplify the predicting calculation in the solidified condition with a mathematical model, to realize the improvement of accuracy and to predict the light rolling reduction position to a cast slab at high velocity based on the predicting result in the solidified condition in the high accuracy related to a temp. predicting method at unsolidified part in the cast slab, which is suitable to use in order to decide the light rolling reduction position, at the time of executing the light rolling reduction to the cast slab for preventing segregation of impurity elements in the center part of the continuously cast slab. CONSTITUTION:Then, in a mold part, the solidified condition of the cast slab 2 is obtd. from a difference calculation by applying a heat content-convertion temp. method and in a secondary cooling zone, the solidified thickness X(t) is obtd. by solving a solidifying velocity equation after obtaining the solidifying velocity equation by using the result of the difference calculation and applying a heat balance equation at solid-liquid interface and an intergrating profile method approximating a quadratic equation to the solid phase part temp. The temp. distribution at the unsolidified part 2b is assumed so as to satisfy the prescribed boundary condition equation using this solidifying thickness X(t), and based on the temp. distribution of this unsolidified part 2b, the center temp. of the cast slab 2 is predicted.</p> |
