CAJ | 학술논문

采用直接差分法求解热传导方程，对镁合金铸造过程进行模拟，研究了铸型条件对温度分布和铸件质量的影响。结果表明：砂型铸造条件下，铸型导热系数小，铸件凝固速率慢，铸件\铸型界面温度值突变小；金属型铸造条件下，铸型导热系数大，铸件凝固速率快，铸件\铸型界面温度值突变大。在实际铸造工艺中，需选择合适导热系数的材料制作铸型，从而在避免较大热变形和热裂现象的同时提高铸造速度。
채용직접차분법구해열전도방정，대미합금주조과정진행모의，연구료주형조건대온도분포화주건질량적영향。결과표명：사형주조조건하，주형도열계수소，주건응고속솔만，주건\주형계면온도치돌변소；금속형주조조건하，주형도열계수대，주건응고속솔쾌，주건\주형계면온도치돌변대。재실제주조공예중，수선택합괄도열계수적재료제작주형，종이재피면교대열변형화열렬현상적동시제고주조속도。
The direct differential method for solving equations of heat conduction and simulate the casting process of magnesium alloy. The effect of the mould on distribution of temperature and the casting quality is studied. The results show that during the sand mold casting, due to coefifcient of conduction for mould is small, the solidification velocity of cast is slowly, the mutation of temperature in the interface of cast/mold is small. During the metal mold casting, due to coefifcient of conduction for mould is larger, the solidiifcation velocity of cast is fast, the mutation of temperature in the interface of cast/mold is larger. In the actual casting process, we should choose the material with suitable thermal coefifcient conductivity to make mold, to avoid larger thermal deformation and cracking phenomenon while improve the casting speed.