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在１×１０－４ｓ－１应变速率下对碳含量较低（０．０７％）、中等（０．１１％～０．１３％）和较高（０．３０％）的钢的连铸坯试样的热延性进行了测试．在１３００～１０００℃之间，各钢种试样均具有良好的延性．在该温度区间，碳含量中等钢试样抵抗裂纹产生的能力不低于碳含量较低和较高钢．在γ单相区低温域，碳含量较低和较高钢试样的延性显著低于碳含量中等钢．而在γ＋α两相域，钢的低延性区域随碳含量的增加向低温方向移动，碳含量较低钢的延性好于碳含量中等和较高钢．
For slabs with lower carbon content (0.07%), medium (0.11% -0.13%) and higher (0.30%) steel at a strain rate of 1 x 10-4s-1 The hot ductility of the specimen was tested. Between 1300 ~ 1000 ℃, the steel samples have good ductility. In this temperature range, the carbon content of medium steel samples to resist the generation of cracks is not less than the lower carbon content and higher steel. In the γ single-phase zone, the ductility of the low and high carbon steels is significantly lower than that of the medium carbon steels. In the γ + α two-phase region, the low ductility region of steel moves toward the low temperature with the increase of carbon content. The ductility of the steel with lower carbon content is better than that with medium carbon content and higher carbon content.