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发展大型、高功率的燃气轮机无论对于动力、国防、运输或机械制造工业都具有很大的意义。如所周知,燃气输机功率的提高在相当大的程度上决定于它们的温度参数。现代燃气轮机发展的特点之一,即是不断提高压气机和燃烧室中的工作温度。这样即要求冶金部门不断探寻新型的,符合各种要求的耐热合金并提高它们的性能。目前在较高工作温度条件下获得广泛发展的系以镍、铬为基体,含有多种合金元素的合金。如在苏联的ЭИ618,ЭИ857,жС—6,АНВ—100,在英美的Nimonic,Inconel,G·70,G·64,Reflec等型。但是现时所采用的绝大部分镍基耐热合金都含有相当高含量的铝及钛,它们在熔化和浇铸过程中很容易和空气中的氧、氮发生化学作用,而在金属表面或其内部形成大量的铝和钛的氧化、氮化膜。这些膜(Плен)将破坏材料的完整性,急剧地降低合金的强度并严重地使合金铸造性能
The development of large, high-power gas turbines is of great significance for power, defense, transport or machinery manufacturing industries. As is known, the increase of gas turbine power depends to a large extent on their temperature parameters. One of the characteristics of the development of modern gas turbines is to continuously increase the operating temperature in the compressor and the combustion chamber. This requires the Metallurgical Department to constantly explore new and meet the requirements of the heat-resistant alloys and improve their performance. Currently at the higher operating temperature conditions are widely developed Department of nickel, chromium matrix, containing a variety of alloying elements of the alloy. Such as the Soviet Union ЭИ618, ЭИ857, жС-6, АНВ-100, in the Anglo-American Nimonic, Inconel, G · 70, G · 64, Reflec and other types. However, most of the currently used Ni-based heat-resistant alloys contain a very high content of aluminum and titanium, which easily chemically and chemically react with oxygen and nitrogen in the air during melting and casting. However, Formed a large number of aluminum and titanium oxide, nitride film. These films (Плен) will destroy the integrity of the material, drastically reduce the strength of the alloy and severely cast alloy performance