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摘要
The numerical simulation of filling and solidifying process of magnesium alloy AZ91D die casting was performed with finite element software. The volume fractions of macro porosity and gas porosity existing in the die casting were analyzed. The influence of injection speeds, pouring temperatures and mold initial temperatures on the quality of die casting was investigated by taking the size of casting flaws as standard. The best technological parameters, under which the macro porosity and gas porosity in the magnesium parts can be reduced and the density and surface quality of die castings can be increased, were obtained. The results show that the optimum condition which makes the flaws in the die casting least is as follows: injection speed of 2.4 m/s, pouring temperature of 655°C, mold initial temperature of 200°C. Finally the maximum volume fraction of macro porosity is only 1.90980%, while that of gas porosity is 1.76683 × 10-6.
- 出版日期2006
- 单位上海交通大学
