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现代航空发动机的推力、进气温度和寿命水平的迅速提高 ,使国内目前广泛应用的镍基铸造高温合金叶片已完全不能满足。钢铁研究总院与中国南方航空动力机械公司共同研制的 DD4 0 2单晶合金 ,使用温度达 10 5 0～ 110 0℃ ,可用于制作最先进的高性能航空发动机的一、二级涡轮叶片
The thrust of modern aeroengine, the temperature of intake air and the rapid increase of life span make the widely used nickel-based foundry superalloy blades in our country can not satisfy at all. DD4 0 2 single crystal alloy jointly developed by China Iron and Steel Research Institute and China Southern Air Power Machinery Co., Ltd. can be used to make the first-stage and second-stage turbine blades of the most advanced high-performance aeroengines at a temperature of 10500-110O0C