This research is aimed to correlate heat transfer coefficient to pressure at the interface between 19Cr-14Mn-0.9N high nitrogen steel cylindrical ingot and cast iron mould, during the pressurized solidification process of cylindrical ingot. The correlations were obtained by mathematical inverse model of heat conduction problem. Validation results indicate that this model is applicable to investigate the change in interfacial heat transfer coefficient during the pressurized solidification process of 19Cr-14Mn-0.9N high nitrogen steel, and guarantee the correlation accuracy. Combing with theoretical derivation for cylindrical steel ingot, the change in interfacial heat transfer coefficient with time can be described by h_f,0.5 = 679.68t^−0.12 W/(m³·K) for 0.5 MPa, h_f,0.85 = 753.53t^−0.12 W/(m³·K) for 0.85 MPa and h_f,1.2 = 790.39t^−0.12 W/(m³·K) for 1.2 MPa, quantitatively. Meanwhile, an empirical formula was presented to correlate interfacial heat transfer coefficient to pressure, which can be taken as heat transfer boundary to simulate the change in solidification state of 19Cr-14Mn-0.9N high nitrogen steel cylindrical ingot with pressure.

这项研究的目的是在圆柱锭加压凝固过程中，将传热系数与19Cr-14Mn-0.9N高氮钢圆柱锭与铸铁模具之间的界面压力相关联。通过导热问题的数学逆模型获得相关性。验证结果表明，该模型可用于研究19Cr-14Mn-0.9N高氮钢加压凝固过程中界面传热系数的变化，并保证了相关精度。结合圆柱钢锭的理论推导，可以将界面传热系数随时间的变化描述为h _f，0.5 = 679.68 t ^-0.12 W /（m³ ·K）0.5兆帕，ħ _˚F，0.85 = 753.53吨^-0.12 W /（米³ ·K）为0.85兆帕，ħ _˚F，1.2 = 790.39吨^-0.12 W /（米³ ·K）为1.2兆帕，数量上。同时，提出了一个将界面传热系数与压力相关联的经验公式，该公式可以作为传热边界来模拟19Cr-14Mn-0.9N高氮钢圆柱锭的凝固状态随压力的变化。