Influence of Austenite Phase Transformation on Existing Microstructure of Low C-Mn Steel

Authors

  • S. H. Abro Department of Materials Engineering, NED University of Engineering & Technology, Pakistan
  • A. Chandio Department of Metallurgical Engineering, NED University of Engineering & Technology, Pakistan
  • A. R. Jamali Department of Materials Engineering, NED University of Engineering & Technology, Pakistan
  • S. A. Shah Department of Metallurgical Engineering, NED University of Engineering & Technology, Pakistan
Volume: 8 | Issue: 6 | Pages: 3525-3529 | December 2018 | https://doi.org/10.48084/etasr.2324

Abstract

Cold heading quality CHQ steel is widely used for making small components due to its excellent cold heading response. Austenite nucleation and growth morphology of a commercial CHQ steel has been studied by continuous heating experiments using lead-bath up-quenching at different heating temperatures. Modern optical microscope Olympus GX51, scanning electron microscopy techniques have been deployed to reveal and interpret the microstructure. It was found that at 740°C the microstructure shows lack of homogeneity, hence the cold-head-ability of CHQ steel is anisotropic. At high temperatures, in austenite domain, at 60sec, the resultant austenite is highly homogenous. Then the cold-head-ability properties of CHQ steel turned to be isotropic.

Keywords:

CHQ steel, up-quenching, phase transformation, microstructure, heating rate, austenite

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[1]
S. H. Abro, A. Chandio, A. R. Jamali, and S. A. Shah, “Influence of Austenite Phase Transformation on Existing Microstructure of Low C-Mn Steel”, Eng. Technol. Appl. Sci. Res., vol. 8, no. 6, pp. 3525–3529, Dec. 2018.

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