高温合金精密铸造技术研究进展

The Progress of Investment Casting of Nicke1-Based Superalloys

综述了高温合金多晶铸造、定向凝固、单晶制备等几种主要制备技术的原理、方法、研究现状和存在问题,分析了铸造高温合金晶粒组织控制、晶体取向选择和控制,介绍了单晶叶片的引晶和选晶原理和技术,对单晶铸造高温合金的缺陷进行了分析,并展望了高温合金精密铸造的今后发展方向。

This paper reviews the principle, techniques, research statues and current problems of major processing technologies of cast superalloys, such as polycrystalline casting, directional solidification, single-crystal manufacture. The cast structure control and crystal orientation selection during solidification were analyzed. Single-crystal processing including bottom-seeding and spiral selection technique was summarized. The formation mechanism and control methods of typical cast defects in single crystal superalloys were analyzed. Finally, the possible development trends of the superalloy investment casting in future were prospected.