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用 TCS热分析法测定低合金灰铸铁的抗拉强度和硬度，对铁液延长保温时间，可出现如下现象： 1)抗拉强度和硬度瞬时下降后又明显上升： 2)碳、硅含量较高时可用延长过热时间的方法提高抗拉强度和硬度； 3)铁液经过过热，铸态石墨长度由 10～ 20μ m缩短到 2μ m左右； 4)在碳、硅含量较低时白口范围增加 (激冷层加厚 )尤为显著； 5)白口共晶温度 Tec和孕育共晶温度 Teg几乎不随过热时间变化，但实际共晶温度 Teo则向白口共晶温度 Tec侧下降； 6)用初晶温度求得的 CE值和由共晶温度求得的△ T1 /△ T3作为自变量，把抗拉强度、硬度以及石墨长度作为因变量，可得到一套完整的回归方程式，即用 TCS热分析法来测定铁液状态的低合金灰铸铁抗拉强度和硬度是完全可能的。
Tensile strength and hardness of low-alloy gray cast iron can be determined by TCS thermal analysis, and the following phenomena can occur when hot metal is prolonged: 1) Tensile strength and hardness are obviously increased after transient drop: 2) High when extended overheating time can be used to improve the tensile strength and hardness; 3) hot iron after overheating, as-cast graphite length from 10 ~ 20μ m reduced to 2μ m or so; 4) carbon and silicon content is low white range (E) the increase of the thickness of the chilled layer is significant; 5) the eutectic temperature Tec and the eutectic temperature Teg hardly change with the overheating time, but the actual eutectic temperature Teo decreases toward the Tec side of the eutectic temperature; 6) Using the CE value obtained from the primary crystallization temperature and ΔT1 / ΔT3 obtained from the eutectic temperature as independent variables, taking the tensile strength, hardness and graphite length as dependent variables, a complete regression equation can be obtained, that is, TCS thermal analysis to determine the state of molten iron low alloy gray cast iron tensile strength and hardness is entirely possible.