ALLOYS ON BASIS OF NICKEL AND METHODS OF THERMAL TREATMENT OF ALLOYS ON BASIS OF NICKEL

摘要

FIELD: metallurgy.;SUBSTANCE: alloys of type 718 on the basis of nickel allows microstructure, which predominate is strengthened by emissions of γ-phase and contains some amount of at least one extraction by grains boundary, enough for fixation of majority of grains boundary in matrix. Mentioned extractions by grains boundary are selected from the group consisting of extractions of δ-phase, extractions of η-phase and its mixtures, and allows short, in tote rod-like morphology. Such microstructure is provided by thermal treatment, including preprocessing on solid solution, treatment on solid solution, cooling and two treatments by aging. There are opened modes of thermal treatment and composition of nickel alloy.;EFFECT: providing of high mechanical properties at increased temperatures.;39 cl, 4 dwg, 12 tbl, 5 ex