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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

NUMERICAL ASSESSMENT OF INTERFACIAL HEAT TRANSFER COEFFICIENT IN A MG SQUEEZE CASTING WITH VARIOUS SECTION THICKNESS BY POLYNOMINAL EXTRAPOLATION

Get access (open in a dialog) DOI: 10.1615/IHTC16.cms.023294
pages 1745-1752

要約

A 5-step casting die with different cross section thicknesses as 2, 4, 8, 12, 20 mm was machined, and squeeze casting (SC) of Mg alloy AM60 was carried out in a 75-ton hydraulic press. The casting-die interfacial heat transfer coefficients (IHTC) at each step of the 5-step squeeze casting were determined based on experimental thermal histories data throughout the die and inside the casting which were recorded by type-K thermocouples. With measured temperatures, heat fluxes and IHTCs were calculated by the polynomial extrapolation method. The computed results reveal that the section thickness influences IHTC peak values significantly. The IHTC value for the thick step is much higher than that for the thin steps.