Simulation and Experimental Study of the Preheating Mould Temperature Distribution in Semi-Solid Diecasting

Abstract:

The mould temperature distribution has a great influence on the semi-solid diecasting. In the present study the temperature distribution of a plane-shaped mould was investigated by using the method of numerical simulation and experiment. The results showed that the preheating mould temperature field was affected by three important simulation parameters, the heat transfer coefficient h_oil between the heat transfer oil and the mould, the heat transfer coefficient h_air between the mould and the air, and the heat transfer coefficient h_contact between the mould core and the mould frame. The simulation results showed that (1) with the increase of h_oil, the overall mould temperature imcreased; (2) with the increase of h_air, the overall mould temperature decreased, while the surface temperature gradient of mould frame grad T_-f and the temperature difference between the mould core and the mould frame ∆T increased; (3) With the increase of h_contact, ∆T decreased and the temperature of mould frame increased. When the heat oil temperature T_oil=290°C, the heat transfer coefficients were optimized as h_oil=500Wm^-2K^-1, h_air=7Wm^-2K^-1, and h_contact=1000Wm^-2K^-1 according to the experimental results. The average temperature difference between the simulation result and the experimental result was 3.45°C, and the average relative error was 1.73%.

• Periodical: Materials Science Forum (Volume 1035)
• Pages: 833-839
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1035.833
• Online since: June 2021
• Authors: Chao Gao, Min Luo, Da Quan Li*, Song Chen, Jian Feng, Fan Zhang, Fan Zhang
• Keywords: Heat Transfer Coefficient, Mould Temperature Distribution, Numerical Simulation, Semi-Solid Diecasting

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