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分析了固体界面接触热阻的形成机理和影响接触热阻数值的诸多因素,并根据热成形淬火过程模具/板料界面的传热模型,基于傅里叶定律对其界面传热情况进行分析,利用热阻的思想推导出界面接触热阻的表示方法。对已有的测量、计算热成形模具/板料界面接触热阻的方法进行概述:逆热传导法基于导热微分方程和傅里叶定律,通过测得的热流密度计算得到接触热阻;间接法依据接触电阻和接触热阻有相同的产生原因,通过特定装置测定接触电阻再根据接触电阻和接触热阻的关系计算得到接触热阻。最后从测量装置、测量计算原理和测量计算的过程等方面对两种方法进行了比较,并分析了界面接触热阻对热成形模具以及新型材料研发的重要性。
The formation mechanism of thermal contact resistance of solid interface and many factors affecting the contact thermal resistance were analyzed. According to the heat transfer model of the die / sheet interface in the process of hot forming and quenching, the heat transfer of the interface was analyzed based on Fourier law, The idea of thermal resistance is used to derive the method of expressing the thermal contact resistance of the interface. The existing methods of measuring and calculating the thermal contact resistance at the thermoforming die / sheet interface are summarized. The inverse thermal conduction method is based on the thermal differential equation and the Fourier law, and the thermal contact resistance is calculated by the measured heat flux density. The indirect method is based on The contact resistance and the contact resistance have the same reason. The contact resistance is determined by a specific device and then the contact resistance is calculated according to the relationship between the contact resistance and the contact resistance. Finally, the two methods are compared in terms of measurement device, measurement calculation principle and measurement calculation process, and the importance of interface contact thermal resistance to hot forming mold and new material development is analyzed.