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    Volume 46, Issue 1 (January 2018)

    Design and Fabrication of Jominy End-Quench Testing Machine: Hardenability Evaluation of AISI-8620 Case-Hardening Steel

    (Received 10 March 2017; accepted 30 March 2017)

    Published Online: 2017

    CODEN: JTEVAB

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    Abstract

    Metallurgists have long considered the hardenability evaluation because of its necessity in formulating the hardness penetration rate of alloys with reference to their cooling curves. In this work, we designed and fabricated a Jominy end-quench testing machine by following ASTM-A255, Standard Test Methods for Determining Hardenability of Steel, through computer-aided designing. Our design possesses the novelty of water recycling, cooling tower, water-level indicator, and facile interface, and it is compatible with the environment. A hardenability evaluation test of AISI-8620 case-hardening steel has been performed on the as-fabricated machine. The results confirmed that AISI-8620 achieved the maximum hardness of 43.6 HRC at its quenching end through water quenching. Metallographic studies reveal the formation of a sufficient amount of martensite and other microstructures such as retained austenite, bainite, sorbite, and pearlite.

    Author Information:

    Hassan, Muhammad Aqib
    Department of Metallurgy and Materials Engineering, Dawood University of Engineering and Technology, Karachi,

    Mehdi, Muhammad
    Department of Metallurgy and Materials Engineering, Dawood University of Engineering and Technology, Karachi,

    Owais, Muhammad
    Department of Metallurgy and Materials Engineering, Dawood University of Engineering and Technology, Karachi,

    Nasir, Muhammad
    Department of Chemistry, Adamjee Government Science College, Karachi,

    Haider, Syed Muhammad Kumail
    Department of Metallurgy Engineering, NED University of Engineering and Technology, Karachi,


    Stock #: JTE20170185

    ISSN:0090-3973

    DOI: 10.1520/JTE20170185

    Author
    Title Design and Fabrication of Jominy End-Quench Testing Machine: Hardenability Evaluation of AISI-8620 Case-Hardening Steel
    Symposium ,
    Committee A01