机械振动对A356和AZ91D消失模充型的影响

Influence of mechanical vibration on the filling capacity of A356 and AZ91D in lost foam casting

在A356铝合金和AZ91D镁合金消失模铸造浇注过程中采用与流动方向一致的水平振动,研究不同频率和振幅的机械振动对A356和AZ91D消失模铸造充型能力的影响.建立了消失模振动浇注时金属液充型数学模型,利用流体动力学和传热学原理,分析振动对消失模铸造浇注过程中充型能力的影响.结果表明:金属液充型能力随着振动频率和振幅的增加而增强,振动峰值加速度在1g^4g之间,机械振动可明显提高A356和AZ91D消失模铸造充型能力.数学模型计算结果与实验结果基本一致.

Mechanical vibration was applied during lost foam casting （LFC） process of A356 aluminum alloy and AZ91D magnesium alloy. The vibration direction was the same as the flow direction, and the influence of mechanical vibration at different frequency and amplitude on the filling capacity of A356 and AZ01D under lost foam casting was studied. The filling mathematical model was established in lost foam casting by the vibration, and the filling capacity was analyzed by the fluid dynamics and heat transfer, and the influence of the vibration on the filling capacity of the alloys was explained. The resuits show that the fiiling capacity of the alloys increase with the vibration frequency and amplitude increased, and it is obviously increased applying mechanical vibration to be at the peak acceleration between from lg to 4g. The calculated results of filling capacity of the mathematical model are basicaIly consistent with the experimental results.