A. A. Alpatov, V. V. Molokanov, A. V. Krutilin, N. A. Palii, M. A. Kaplan, T. R. Chueva, P. P. Umnov
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Abstract—The structure and mechanical properties of casting rods of Co alloy 84KKhSR subjected to zone melting (ZM) under different conditions are studied using bending and compression tests. The optimum ZM conditions, namely, a melt zone temperature of 1150°C and a speed of melt zone movement through an inductor of 10 mm/min are determined based on three-point bending test data. These conditions are noted to ensure the maximum strength (\(\sigma _{{\text{u}}}^{{{\text{bend}}}}\) = 1970 MPa) and elastic deflection of sample; a fine eutectic structurally strengthened with longitudinally oriented dendrites forms in a rod. A high compression strength of 2300–2600 MPa and the hyperelasticity effect are shown to form at a melt temperature of 1150°C and a speed of melt zone movement of 1–20 mm/min. The elastic deformation is 2–3%, and the total reversible deformation can reach 6%; plastic deformation traces are absent. Prospects for the use of high strength hyperelastic cast near-eutectic rods are shown.
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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