P. G. Min, V. E. Vadeev, D. A. Chemov, S. I. Kolesnikov
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Abstract—A technology for producing a rhenium–nickel alloy for alloying cast nickel superalloys is presented. The optimum technological scheme for manufacturing a master alloy from preparing a raw material to the final product is developed. The feasibility of vacuum annealing of a rhenium powder before melting, which ensures both sintering and degassing of the powder, is justified. Technological conditions for annealing of the powder and melting of the master alloy in a vacuum arc furnace with a nonconsumable electrode are developed to minimize the gas ([O], [N]) content, to ensure a high yield (η = 99.9–100%), and to achieve a uniform distribution of the main components over the ingot volume. The master alloy has been successfully tested in the production of single-crystal nickel superalloys.
期刊介绍：
Russian Metallurgy (Metally) publishes results of original experimental and theoretical research in the form of reviews and regular articles devoted to topical problems of metallurgy, physical metallurgy, and treatment of ferrous, nonferrous, rare, and other metals and alloys, intermetallic compounds, and metallic composite materials. The journal focuses on physicochemical properties of metallurgical materials (ores, slags, matters, and melts of metals and alloys); physicochemical processes (thermodynamics and kinetics of pyrometallurgical, hydrometallurgical, electrochemical, and other processes); theoretical metallurgy; metal forming; thermoplastic and thermochemical treatment; computation and experimental determination of phase diagrams and thermokinetic diagrams; mechanisms and kinetics of phase transitions in metallic materials; relations between the chemical composition, phase and structural states of materials and their physicochemical and service properties; interaction between metallic materials and external media; and effects of radiation on these materials.
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