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三十年来,航空发动机涡轮叶片的发展经历了两次重大的变革,其一是:五十年代出现了真空熔模铸造涡轮叶片,在六十年代迅速取代当时占优势的锻造叶片而投入大量生产;其二是:六十年代兴起了采用定向凝固技术铸造的涡轮叶片,在七十年代得到广泛应用,取代原先的普通铸造叶片(特别是高压叶片)。这两次工艺上的重大变革,不仅有力地促进了高温合金的迅速发展,而且为空心叶片冷却技术的发展创造了极为有利的条件,综合的结果
For three decades, the development of turbine blades for aeroengines has undergone two major changes. One is the appearance of vacuum investment casting turbine blades in the 1950s, the rapid replacement of then dominant forging blades in the 1960s and the mass production ; The other is that the turbine blades made by directional solidification technology emerged in the 1960s and were widely used in the seventies to replace the original ordinary casting blades (especially the high-pressure blades). These two major technological changes have not only strongly promoted the rapid development of superalloys, but also created extremely favorable conditions for the development of hollow blade cooling technology. The comprehensive result