CAJ | 학술논문

对高温合金单晶选晶生长工艺进行了实验研究，揭示了螺旋选晶器和缩颈选晶器的选晶原理。实验结果表明，在螺旋选晶器中，晶体横向择优生长与螺旋结构的耦合作用，形成连续选晶过程，是螺旋选晶的主要原理，其选晶作用良好；而在缩颈选晶器中，几乎只存在单一的机械阻隔选晶行为，多重缩颈结构对于改善选晶作用并不明显，选晶效果不好。
대고온합금단정선정생장공예진행료실험연구， 게시료라선선정기화축경선정기적선정원리。 실험결과표명， 재라선선정기중， 정체횡향택우생장여라선결구적우합작용， 형성련속선정과정， 시라선선정적주요원리， 기선정작용량호；이재축경선정기중， 궤호지존재단일적궤계조격선정행위， 다중축경결구대우개선선정작용병불명현， 선정효과불호。
The single crystal selection processes of superalloy in the helix selector and thin-neck selector were studied. The results indicate that the main grain selection mechanism of the helix selector is that the easy growth direction of the cubic crystal coupled with the helical structure of the selector. Helix selector combines with the characteristics of thin-neck and angled grain selector in structure. In thin-neck selector， there is only the grain selection function of mechanical restricting， and the design of multiple thin necks is not beneficial to improving the grain selection effect.