STUDY ON INTERFACIAL HEAT TRANSFER COEFFICIENT BETWEEN METAL-DIE INTERFACE OF HIGH PRESSURE DIE CASTING PROCESS OF ALUMINUM ALLOY

Acta Metall Sin

2007, Vol. 42

Issue (1): 103-106 DOI:

Research Articles

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STUDY ON INTERFACIAL HEAT TRANSFER COEFFICIENT BETWEEN METAL-DIE INTERFACE OF HIGH PRESSURE DIE CASTING PROCESS OF ALUMINUM ALLOY

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. STUDY ON INTERFACIAL HEAT TRANSFER COEFFICIENT BETWEEN METAL-DIE INTERFACE OF HIGH PRESSURE DIE CASTING PROCESS OF ALUMINUM ALLOY. Acta Metall Sin, 2007, 42(1): 103-106 .

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Abstract 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.

Key words: High pressure die casting Aluminum alloy ADC12Z Interfacial heat transfer coefficient

Received: 29 May 2006

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