铝合金汽车转向器压铸过程的数值模拟与产品组织分析

摘要

利用铸造模拟软件ProCAST对ADC12铝合金汽车转向器的压铸充型过程进行数值模拟,包括充型时间、温度场和卷气顺序对压铸件质量的影响,获得较优的压铸工艺参数(浇注温度650℃、模具温度220℃、快压射速度3.0 m/s和慢压射速度0.3 m/s),为提高铝合金汽车转向器的压铸质量提供依据.用优化工艺参数制备的压铸件内部质量良好,无明显夹杂和孔洞等缺陷.%Numerical simulation, including the effects of filling time, temperature and volume order on the quality of die-casting respectively, for die-casting filling process of automobile steering gear with ADC12 aluminum alloy was performed with casting simulation software ProCAST. The optimum die-casting technological parameters with pouring temperature of 650℃, mold temperature of 220℃, rapid injection speed of 3.0 m/s and slow injection speed of 0.3 m/s are obtained. It can provide the basis for improving the quality of automobile steering gear. According to the optimum process, the die-casting exhibits good quality in different locations, and no obvious defects including inclusions and cavities.