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热型连铸Ｓｎ４０％Ｐｂ时，用连续测温方法测定铸型出口处不同温度下的型内温度分布。由此求得固＋液区的长度、位置和温度梯度等数据。发现随着铸型温度的提高，固＋液区变短并向型出口移动；温度低于２１６℃时，由于固＋液区长而形成热裂，高于此温度热裂消除并获得光洁表面；温度梯度大于０．３９℃／ｍｍ时实现等轴晶向柱状晶的转变。
Thermal continuous casting Sn 40% Pb, with continuous temperature measurement at the exit of the mold at different temperatures within the type of temperature distribution. The solid + liquid region is obtained from the length, position and temperature gradient and other data. It is found that with the increase of the temperature of the mold, the solid + liquid region becomes shorter and moves toward the outlet. When the temperature is lower than 216 ° C, a hot crack is formed due to the long solid + liquid region, and the hot crack is eliminated above this temperature to obtain a clean surface When the temperature gradient is more than 0.39 ℃ / mm, the transformation of equiaxed grains to columnar grains is achieved.