Abstract
The present work focused 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, using “step shape” casting—so-called because of its shape. The IHTC was successfully determined by solving one of the inverse heat problems using the nonlinear estimation method first used by Beck. The calculation results indicated that the IHTC immediately increased after liquid metal was brought into the cavity by the plunger and decreased as the solidification process of the liquid metal proceeded. The liquid metal eventually solidified completely, a condition when the IHTC tended to be stable. Casting thickness played an important role in affecting the IHTC between the metal and die not only in terms of its value but also in terms of its change tendency. Also, under the test conditions, different change tendencies of the metal solid fraction were found between castings with different thicknesses and the die.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Griffiths W D. A model of the interfacial heat-transfer coefficient during unidirectional solidification of an aluminum alloy. Metallurgical and Materials Transactions B, 2000, 35B: 285–295
Santos C A, Quaresma J M V, Garcia A. Determination of transient interfacial heat transfer coefficients in chill mold castings. Journal of Alloys and Compounds, 2001, 319: 174–186
Michel F, Louchez P R, Samuel F H. Heat transfer coefficient during solidification of Al-Si alloys: Effects of mold temperature, coating type and thickness. AFS Transactions, 1995, 09: 275–283
Prabhu K N, Kumar S A, Venkataraman N. Effect of coating/mold wall/casting thickness on heat transfer and solidification of Al-Cu-Si alloy (LM-21) in cast iron molds. AFS Transactions, 1994, 109: 827–832
Krishman M, Sharma D G R. Determination of heat transfer coefficient between casting and chill in unidirectional heat flow. AFS Transactions, 1994, 16: 769–774
Lau F, Lee W B, Xiong S M, et al. A study of the interfacial heat transfer between an iron casting and a metallic mould. Journal of Material Processing Technology, 1998, 79: 25–29
Hallam C P, Griffiths W D. A model of the interfacial heat-transfer coefficient for the aluminum gravity die-casting process. Metallurgical and Materials Transactions B, 2004, 35B: 721–733
Beck J V, Blackwell B, Clair C R S T. Inverse Heat Conduction: Ill-posed Problems. New York: Wiley, 1985, 145–162
Author information
Authors and Affiliations
Corresponding author
Additional information
__________
Translated from Acta Metallurgica Sinica, 2007, 43(1): 103–106 [ 译自: 金属学报]
Rights and permissions
About this article
Cite this article
Guo, Z., Xiong, S., Cho, S. et al. Interfacial heat transfer coefficient between metal and die during high pressure die casting process of aluminum alloy. Front. Mech. Eng. China 2, 283–287 (2007). https://doi.org/10.1007/s11465-007-0049-z
Issue Date:
DOI: https://doi.org/10.1007/s11465-007-0049-z