中文摘要：

通过测量硼钢B1500HS空冷过程中板料中心点的温度变化,结合有限元分析及反传热模型获得了板料空冷换热系数与温度的关系。结果表明：板料温度从930～700℃下降相对较快,平均热交换系数高于200W/（m^＋2℃）;温度在700～400℃,其温度下降趋于平缓,平均热交换系数为114 W/（m^＋2℃）;温度在400～200℃时,其温度下降缓慢,平均热交换系数为83W/（m^＋2℃）,而温度低于200℃,热交换系数小于70W/（m^＋2℃）。

英文摘要：

Heat transfer coefficient of boron steel cooling in air is the key factor to obtain the initial temperature of boron steel hot stamping parts. By measuring the temperature changes of blank in the process of cooling in air and combining with finite element analysis and the inverse heat transfer model, the relationship between heat transfer coefficient and temperature was obtained. The results show that the temperature of blank between 930 ℃ to 700 ℃ decreases rapidly and heat transfer coefficient ishigherthan200W/（m^＋2℃）.Blanktemperaturedropgentlybetween700and400℃ andheattransfercoefficientis l14W/ （m^＋2℃）. When the temperature of blank is 400 ℃ to 200 ℃, heat transfer coefficient is 83 W/（m^＋2℃）.When the temperature of the blank drops to below 200 ℃, the heat transfer coefficient is less than 70 W/（m^＋2℃）.