为了提高带有叶片的整铸涡轮盘的性能和使用寿命,在其铸造工艺中采用了控制结晶技术。例如,采用晶粒细化技术,使轮盘和叶片部分均获得尺寸小于0.1mm的细晶组织,从而使铸件疲劳性能显著提高,并大大降低力学性能的分散性。又例如,先用一种合金 In order to improve the performance and service life of a bladed cast turntable, a controlled crystallization technique is used in its casting process. For example, the use of grain refinement technology, the roulette and blade parts are obtained in the size of less than 0.1mm fine grain structure, so that casting fatigue performance significantly increased, and greatly reduce the mechanical properties of the dispersion. For another example, use an alloy