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Effect of Process Parameters, Casting Thickness, and Alloys on the Interfacial Heat-Transfer Coefficient in the High-Pressure Die-Casting Process

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Abstract

The heat transfer at the metal-die interface is believed to have great influence on the solidification process and cast structure of the high-pressure die-casting (HPDC) process. The present article focused on the effects of process parameters, casting thickness, and alloys on the metal-die interfacial heat-transfer coefficient (IHTC) in the HPDC process. Experiment was carried out on a cold-chamber die-casting machine with two casting alloys AM50 and ADC12. A special casting, namely, “step-shape” casting, was used and cast against a H13 steel die. The IHTC was determined using an inverse approach based on the temperature measurements inside the die. Results show that the IHTC is different at different steps and changes as the solidification of the casting proceeds. Process parameters only influence the IHTC in its peak value, and for both AM50 and ADC12 alloys, a greater fast shot velocity leads to a greater IHTC peak value at steps 1 and 2. The initial die surface temperature has a more prominent influence on the IHTC peak values at the thicker steps, especially step 5. Results also show that a closer contact between the casting and die could be achieved when the casting alloy is ADC12 instead of AM50, which consequently leads to a higher IHTC.

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Acknowledgments

This research was financially supported by the National Science Foundation of China (Grant No. 50675114) and by the National Basic Research Program of China (Grant No. 2006CB605208-2). The experimental works were conducted at Tsinghua-TOYO R&D Center of Magnesium and Aluminum Alloys Processing Technology with the help of engineers from TOYO Machinery & Metal Co., Ltd.

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Authors and Affiliations

  1. Tsinghua-Toyo R&D Center of Magnesium and Aluminum Alloys Processing Technology, Department of Mechanical Engineering, Tsinghua University, Beijing, 100084, People’s Republic of China

    Zhi-Peng Guo (Doctoral Candidate), Shou-Mei Xiong (Professor) & Bai-Cheng Liu (Professor)

  2. Research & Advanced Engineering Department, Scientific Research Laboratory, Ford Motor Company, Dearborn, MI, 48121, USA

    Mei Li (Doctor) & John Allison (Senior Technical Leader)

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  1. Zhi-Peng Guo
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  2. Shou-Mei Xiong
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  3. Bai-Cheng Liu
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  4. Mei Li
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  5. John Allison
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Correspondence to Shou-Mei Xiong.

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Manuscript submitted October 28, 2007.

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Guo, ZP., Xiong, SM., Liu, BC. et al. Effect of Process Parameters, Casting Thickness, and Alloys on the Interfacial Heat-Transfer Coefficient in the High-Pressure Die-Casting Process. Metall Mater Trans A 39, 2896–2905 (2008). https://doi.org/10.1007/s11661-008-9640-0

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