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Upon Heating Temperatures in Low Research Article Microstructure Integration Carbon Mn Steel

Author(s)
Shahid Hussain Abro Department of Metallurgical Engineering, NED University of Engineering and Technology, Pakistan
Mohammed N. Alghamdi Department of Mechanical Engineering Technology, Yanbu Industrial College,Kingdom,Saudi Arabia
Muhammad Sohail Hanif Department of Materials Engineering, NED University of Engineering and Technology, Pakistan
Hazim Moria Department of Mechanical Engineering Technology, Yanbu Industrial College,Kingdom,Saudi Arabia
Hamza Suharwardi Department of Metallurgical Engineering, NED University of Engineering and Technology, Pakistan
Abstract
Continuous heating phenomena performed at lead bath-quenching in which austenitic development morphology investigated.The CHQ steel analyzed in the context of Advanced Optical Microscope of Olympus GX51, SEM and Thin-film X-ray Difracto-meter, with high-intensity mode have been deployed in order to examine the kinetics behavior of austenitic development at CHQ steel. On several quenching experiments the austenite formed at different temperatures and time 10s, 15s, 30s, and 60sec and 800°C 710°C, 740°C, 770°C respectively. Initial microstructure for both the steel is ferrite and pearlite. AC1 temp: is assumed to be 740°C and AC3 temperature 800°C has been examined methodically. The soaking time and holding temp: play an important role in developing of gamma-austenite. Mostly ferrite and cementite morphology exist at nucleation sites. At ferrite-ferrite grain interface the austenitic nucleation is not found. At high temperatures, the development of austenite at pearlitic nearby areas are highly noticed. At 800°C growth is about fingertype morphology. The fingers are parallel to pearlite so it is strongly believed that within this area the bainite structure is to be formed. This bainite is assumed to be austenite before cooling.
Publication Details
Page(s) 164-169
DOI DOI not available
Published Journal: Journal of Engineering and Applied Sciences, Volume: 39, Issue: 2, Year: 2020

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Keywords
microstructure, Austenite, Up-quenching, CHQ steel, Phase transformation, Lead-Bath, Heating rate
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