1.前言 随着航空发动机性能的不断提高,对航空涡轮发动机部件(包括涡轮盘、涡轮叶片)工作寿命的要求也在提高。国外研制了柱状晶材料、单晶材料、共晶复合材料等,并且进行了柱状晶、单晶叶片生产方法的研究工作。采用单晶涡轮叶片可以延长发动机的使用寿命和降低燃油消耗率。单晶涡轮叶片的制造方法在欧美和苏联已经用于工业生产。 我们从1981年开始研制铸造镍基高温合金 1. INTRODUCTION With the continuous improvement of aeroengine performance, the requirements for working life of aviation turbine engine components (including turbine disks and turbine blades) are also increasing. Foreign developed columnar crystalline materials, single crystal materials, eutectic composite materials, and the columnar crystal, single crystal leaf production methods research work. The use of single-crystal turbine blades can extend the life of the engine and reduce fuel consumption. The manufacturing method of single crystal turbine blades has been used in industrial production in Europe, the United States and the Soviet Union. We started casting nickel-base superalloy from 1981