Abstract
Thermokinetic diagrams of supercooled-austenite decomposition are plotted for K76Ф rail steel with the addition of 0.026% and 0.092% Cr. The hardenability of the steel is determined. The temperature of Jominy samples is analyzed. The microstructure of the steel is established. The influence of the cooling rate, temperature, and chromium content on the microstructure and hardness of the steel is investigated. The cooling rate such that uniform pearlite microstructure is obtained is established. The limiting hardness of the pearlite microstructure is determined.
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Shur, E.A., Influence of structure on operating durability of rails, in Mater. II Vseross. nauchno-tekh. seminara “Vliyanie svoistv metallicheskoi matritsy na ekspluatatsionnuyu stoikost’ rel’sov” (Proc. II All-Russ. Sci.-Tech. Seminar “Influence of Metal Matrix on Operating Durability of Rails”), Yekaterinburg: Ural. Inst. Met., 2006, pp. 37–63.
Dobuzhskaya, A.B., Galitsyn, G.A., Matveev, V.V., and Belokurova, E.V., Influence of structure on durability of rails to the contact anti-fatigue defects, in Mater. 3-i mezhd. konf. “Transmet-2007” “Sovremennye tekhnologii proizvodstva transportnogo metalla” (Proc. 3rd Int. Conf. Transmet-2007 “Modern Industrial Technologies of Transport Metal”), Yekaterinburg: Ural. Gos. Tekhn. Univ., 2008, pp. 114–118.
GOST (State Standard) R 51685-2013: Railway rails. General technical characteristics (EN 13674-1:2011, NEQ), Moscow: Standartinform, 2013.
GOST (State Standard) R 51685-2000: Railway rails. General technical characteristics, Moscow: Gosstandart Ross., 2000.
GOST (State Standard) 8233-56: Steel. Standards of microstructure, Moscow: Standartgiz, 1960.
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Original Russian Text © A.B. Dobuzhskaya, G.A. Galitsyn, N.V. Mukhranov, M.S. Fomichev, E.V. Belokurova, S.V. Belikov, 2015, published in “Stal’,” 2015, No. 11, pp. 86–91.
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Dobuzhskaya, A.B., Galitsyn, G.A., Mukhranov, N.V. et al. Structural and phase transformations in the cooling of rail steel. Steel Transl. 45, 894–899 (2015). https://doi.org/10.3103/S0967091215110066
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DOI: https://doi.org/10.3103/S0967091215110066