Ti-15-3合金离心铸造过程中溢出临界值分析

Analysis of Overflow Critical Value of the Alloy Ti-15-3 During Centrifugai Casting

分析了金属型离心浇注Ti－15V－3Cr－3Sn－3Al（Ti－15－3）合金铸件过程中浇口杯内压力分布；推导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ω0max（r／min）与金属液高度H和浇口杯直径D0之间的关系。计算结果表明，离心浇注过程中，作用在铸件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，而附加压力主要由金属液密度以及旋转角速度来决定。浇口杯高度和直径之间应满足一定的函数关系，其金属液高度为浅口杯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口杯直径的增大而减小。

The pressure distribution in the Pouring basin during the centrifugal casting of the alloy Ti-15V-3Cr-3Sn-3Al (Ti-15-3) isanalyzed. Relationships between an extra pressure (as), the makimum anglar velvcity(ω0max(r/min)), the height of melt (H) andthe diameter Of pouring basin (D0) are investigated. The calculation results show that the pressure affecting casting consists of ΔPplus the static pressure. The static pressure depends on the melt height, while as is c0ntrolled by metal liquid density and rotatingangular velocity. The POuring basin height and diameter follow a certain functional relation. Idealy the metal liquid should be half ashigh as that of the pouring basin. The auowed maximum angular velocity ω0max increases with H and D0.