METHOD OF FABRICATION CASTABLE REFRACTORY NICKEL-BASED ALLOYS (VERSIONS)

摘要

FIELD: metallurgy.;SUBSTANCE: method of fabrication of castable refractory nickel-based alloys includes melting in vacuum of the carbon containing charge materials, the melt decarburising refinement, addition of wastes of carbon-free castable refractory nickel-based alloys, addition of active alloying elements and refiners. As the refiners to the melt Ca and/or Mg are used in quantity 0.001-0.10% of melt weight in form of granules of Ca- or Mg-containing alloy in vacuum 1×10^-2-5×10^-4 mm Hg, then to the melt one or more rare-earth metals is added in form of Ni- or Co-containing alloy including rare-earth metals, then the melt is filtered via the heated foam-ceramic filter.;EFFECT: increasing of long-term strength of alloys due to decreasing in the melts of sulphur, oxygen and nitrogen content.;6 cl, 2 tbl, 1 ex