Publicação: Determination of the volume fraction of retained austenite in a 300m steel by heat tinting technique
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Applying the Heat Tinting Technique the microestrutural characterization of a 300M steel (medium carbon steel) was accomplished. The steel was austenitized for 20 min to 900°C, followed by holding at 400°C (in the bainitic temperature), with maintenance time of the material in the temperature of 1min, 5min and 30min, aiming at the formation of a multiphase structure. Through the metallographic analysis it is verified that, with the use of this technique, it is possible the determination of the volume fraction of the present phases in the 300M steel, especially in the identification and quantification of the retained austenite. Copyright © 2007 SAE International.
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Maintenance time, Medium-carbon steels, Metallographic analysis, Multi-phase structures, Retained austenite, Volume fraction of retained austenite, Carbon steel, Volume measurement
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Inglês
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SAE Technical Papers.
