通过采集高压铸造过程中铸型内部温度的变化曲线，采用热传导反算法， 求解了以铝合金ADC12Z为铸件材料的铸件-铸型界面换热系数并且分析了该界面换热系数随着铸件厚度的变化而呈现出的变化规律。计算以及分析结果表明：压铸过程中铸件-铸型以及空气-铸型间的界面换热系数随着压铸循环中不同阶段的进行表现出不同的变化规律。铸件的厚度对于铸件-铸型界面换热系数有着很大的影响，不仅表现在厚度的增大提高了换热系数的数值而且厚度的增大对于换热系数的变化趋势也存在的很大的影响。同时，不同厚度的铸件，其固相率和冷却速度的变化规律也存在着较大的区别。
The present work focus on the determination of the interfacial heat transfer coefficient (IHTC) between metal and die during the high pressure die casting (HPDC) process. Experiments were carried out on an aluminum alloy ADC12Z casting called “Step Shape Casting” because of its shape. The IHTC was successfully determined by solving one of the inverse heat problems using the nonlinear estimation method which was first used by J.V. Beck. The calculation results indicated that the IHTC between metal and die increased right after the liquid metal was brought into the cavity by the plunger and decreased as the solidification process of the liquid metal proceeded until the liquid metal solidified completely, when the IHTC intended to be stable. Casting thickness played an important role in affecting the IHTC between metal and die not only in its value but also in its change tendency. Besides different change tendencies of the metal solid fraction were found under the condition between casting with different thicknesses and the die.
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