Airslip结晶器内凝固壳形成特性分析

Analysis of the Development of the Solidification Shell in Airslip Mold

根据Airslip结晶器的传热特性,建立了凝固壳厚度和临界凝固壳厚度的数学模型。理论分析和实验结果表明,凝固壳厚度与铸造速度的乘积为常数,铸造速度增大,凝固壳厚度减小,铸锭表面质量提高;铸造速度的波动引起凝固壳厚度的波动,降低了铸锭的表面质量;铸锭直径和铸造速度的乘积也为常数,铸锭直径增大,铸造速度相应减小。

According to the heat transfer analysis of Airslip mold, an analytical model was presented to study the solidification shell thickness and the critical solidification shell thickness. The theoretical analysis and experimental results indicate that the product of solidification shell thickness and the casting rate is a constant, when the casting rate increases, the solidification shell thickness decreases and the billet surface is better, the variation of the casting rate brings the fluctuation of solidification shell thickness and therefore deteriorates the billet surface. It is also shown that the product of billet diameter and the casting rate is a constant, too. When the billet diameter increases, the casting rate should be reduced correspondingly.