Numerical Simulation of Filling for 7075 Alloy and TiB₂/7075 Composites Wheel Prepared by Low Pressure Die Casting

Abstract:

Based on the experimental and calculation results between the reinforcing particles content and thermal physical parameters, low pressure die casting of wheels was taken as an example to study the casting property of the 7075 alloy and TiB₂/7075 composites. The influences of die temperature, pouring pressure, pouring temperature and TiB₂ content on the filling of 7075 alloy and TiB₂/7075 composites wheels are studied by numerical simulation. Shrinkage porosity appears both in the spoke and rim of the wheel. The shrinkage porosity of the 7075 alloy decreases from 2.089% to 1.622% with mold temperature increasing from 100°C to 400°C. The shrinkage porosity of wheel decreases from 1.630% to 1.598% and 1.583% in the composite with 3 and 6wt.% TiB₂ particles. Besides, shrinkage porosities decrease with increasing pouring temperature.

• Periodical: Advanced Materials Research (Volume 904)
• Pages: 173-179
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.904.173
• Online since: March 2014
• Authors: Qian Gao, Bin Yang*, Gui Sheng Gan, Huan Chun Wu
• Keywords: 7075 Aluminum Alloy, Metal Matrix Composite (MMC), Numerical Simulation, TiB₂

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