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AN INVESTIGATION OF RETAINED AUSTENITE CONTENTS IN CARBURIZED SAE 8620 STEEL

Osman Asi

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Abstract

ABSTRACT In this study, retained austenite contents in carburized SAE 8620 (21NiCrMo2) steel were investigated. Carburizing programs were carried out in gas atmosphere at 940°C. X-ray diffraction was used to determine retained austenite contents in the case-hardened microstructures of the carburized specimens. Test results indicated that maximum retained austenite contents at the microstructures of the carburized specimens that carburized 45 minute, 3 h and 5 h carburizing times at 940°C were 35.8%, 19.4% and 15%, respectively. Key Words : Carburizing, Retained austenite, X-ray diffraction

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What this paper is about

ABSTRACT In this study, retained austenite contents in carburized SAE 8620 (21NiCrMo2) steel were investigated. Carburizing programs were carried out in gas atmosphere at 940°C. X-ray diffraction was used to determine retained austenite contents in the case-hardened microstructures of the carburized specimens. Test results indicated that maximum retained austenite contents at the microstructures of the carburized specimens that carburized 45 minute, 3 h and 5 h carburizing times at 940°C were 35.8%, 19.4% and 15%, respectively. Key Words : Carburizing, Retained austenite, X-ray diffraction

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Available abstract

ABSTRACT In this study, retained austenite contents in carburized SAE 8620 (21NiCrMo2) steel were investigated. Carburizing programs were carried out in gas atmosphere at 940°C. X-ray diffraction was used to determine retained austenite contents in the case-hardened microstructures of the carburized specimens. Test results indicated that maximum retained austenite contents at the microstructures of the carburized specimens that carburized 45 minute, 3 h and 5 h carburizing times at 940°C were 35.8%, 19.4% and 15%, respectively. Key Words : Carburizing, Retained austenite, X-ray diffraction

Key concepts: Carburizing, Austenite, Metallurgy, Microstructure, Materials science, Diffraction, Atmosphere (unit), Optics

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