Abstract: The liquidus temperature of steel 0,14% ~ 0.76% C, 0.48% - 1.48% Mn containing 0.0009% ~ 0,003 0%Ca and steel 0,15% ~ 0.63%C, 0.56%~1.32%Mnfree Ca has been measured by differential thermal analysis method (DTA) , With comparison between analysis value and calculation value, it is obtained that the average influence coefficient A value of calcium element on liquidus temperature of steel is - 0.142 5, and the accuracy of overheat control during casting calcium treated molten steel is improved by amending conventional steel liquidus temperature formula.

摘要： 用差热分析法(DTA)测定了含0.000 9%~0.003 0%Ca的0.14%~0.76%C-0.48%~1.48%Mn钢及不含Ca的0.15%~0.63%C-0.56%~1.32%Mn钢的液相线温度。通过比较分析测定值和计算值,得到钙元素对钢液相线温度的影响系数A值的平均数为-0.142 5,并对传统液相线温度计算公式进行了修正,提高钙处理钢水浇铸时过热度控制的精度。

关键词: 钙处理, 钢的液相线, 差热分析