This paper is concerned with the measurement of thermal properties and in-cavity pressures in cold chamber high-pressure die casting. The influence of in-cavity pressure on the casting porosity, heat flux, and heat transfer coefficient has been investigated during die casting of an A380 alloy. The die was instrumented with heat transfer and pressure sensors to measure these values directly. Direct measurement of the in-cavity pressure was found to be more reliable than the metal pressure calculated from pressure measurements in the hydraulic system. Variations on the intensification pressure directly affect the in-cavity pressure. Changing the intensification pressure between 17 MPa and 90 MPa had little effect on the heat flux and heat transfer which likely reach saturation at a lower pressure during the rapid filling stages. Increases in intensification pressure reduced the level of porosity within the castings, being most effective up to a value of 67.4 MPa.

中文翻译：

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A380合金高压压铸过程中型腔压力对传热和气孔形成的影响

本文涉及冷室高压压铸中热性能和型腔压力的测量。在 A380 合金压铸过程中，研究了型腔压力对铸件孔隙率、热通量和传热系数的影响。模具装有传热和压力传感器，以直接测量这些值。发现直接测量腔内压力比根据液压系统中的压力测量计算的金属压力更可靠。增压压力的变化直接影响型腔内压力。在 17 MPa 和 90 MPa 之间改变强化压力对热通量和传热几乎没有影响，在快速充填阶段可能在较低压力下达到饱和。