2015•Steel in TranslationRequires access

Structural and phase transformations in the cooling of rail steel

A. B. Dobuzhskaya, G. A. Galitsyn, Н. В. Мухранов, М. С. Фомичев, Е. В. Белокурова, S. V. Belikov

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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Available abstract

Key concepts: Hardenability, Pearlite, Microstructure, Materials science, Metallurgy, Austenite, Continuous cooling transformation, Chromium