G. S. Seval’nev, A. E. Smirnov, M. Yu. Semenov, A. S. Nuzhnyi
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引用次数: 0
Abstract—The influence of combined thermochemical treatment consisting of preliminary vacuum nitriding, subsequent vacuum carbonitriding, and final heat treatment (quenching from repeated heating + subzero treatment at –78°C + low tempering) on the wear resistance of high-chromium martensitic bearing steels (95Kh18-Sh, 110Kh18M-ShD) is studied. The combined treatment is shown to increase the contact fatigue limit to 4900 MPa at a specific wear rate no more than (1.05–1.29) ×10–5 mm3/(N m). Preliminary nitriding is found to positively affect wear resistance and fatigue limit, and subzero treatment negatively affects these characteristics.
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.