论文部分内容阅读
分析了金属型离心浇注TiAlNb2 9合金过程中浇道内压力分布情形 ,得出了离心浇注过程中产生的附加压力项ΔP的表达式以及最大转动角速度与金属液高度和浇道直径之间的关系。试验结果表明 ,离心浇注过程中 ,作用在熔体上的压力由静态压力和附加压力两部分组成 ,静态压力由金属液高度决定 ,附加压力主要由金属液密度以及旋转角速度来决定。浇道高度和直径之间应满足一定的函数关系 ,金属液高度为浇道高度的一半时较为理想。最大允许旋转角速度值随金属液高度和浇道直径的增大而减小。
The distribution of pressure in the sprue of the centrifugal casting TiAlNb2 9 alloy was analyzed. The expression of the additional pressure term ΔP and the relationship between the maximum rotation angular velocity and the height of the molten metal and the diameter of the sprue were obtained. The results show that during the centrifugal casting process, the pressure acting on the melt consists of static pressure and additional pressure. The static pressure is determined by the height of the molten metal. The additional pressure is mainly determined by the density of molten metal and the rotational angular velocity. Runner height and diameter should meet a certain relationship between the function of the height of the molten metal is half the height of the runner is more ideal. The maximum allowable rotation angular velocity decreases with the increase of molten metal height and runner diameter.