Abstract
The strict requirements imposed on articles made of high-temperature nickel alloys require improvement of their composition and technology in all stages of metallurgical production. However, at present the degree of their alloying has become practically maximum. The service characteristics of high-ternperature alloys can hardly be improved further by correcting their chemical composition. The problem is solved most successfully by developing new technological regimes of melting and casting. It is economically expedient to use new technological approaches to the already well investigated and tested compositions. The present work is concerned with the effect of the so-called time heat treatment (THT) of liquid metal on the macro- and microstructure of high-temperature nickel alloys used in the production of equiaxial and single-crystal castings.
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