An Overview of Technology and Equipment for Hardening of Large Steel Parts

    Volume 6, Issue 2 (February 2009)

    ISSN: 1546-962X

    CODEN: JAIOAD

    Published Online: 29 January 2009

    Page Count: 14


    Deyneko, L. N.
    National Metallurgical Academy of Ukraine,

    Kobasko, N. I.
    Intensive Technologies Ltd, Kyiv,

    Dobryvechir, V. V.
    Intensive Technologies Ltd, Kyiv,

    Litvinenko, E. I.
    National Metallurgical Academy of Ukraine,

    (Received 10 April 2008; accepted 9 December 2008)

    Abstract

    In the paper, multi-step accelerated-interrupted (AI) quenching is illustrated by its application to fittings for oil and gas pipelines with a diameter up to 1420 mm (1.42 m) and wall thickness from 16 to 80 mm. The multi-step AI quenching is used to improve the mechanical properties of steel parts on the basis of regularities of full film boiling. The developed technology is ecofriendly since it uses water instead of oil as a quenchant. The industrial conditions are described for an automated quench system where the quenchant was water at 60–90°C, which was circulated at different velocities. Favorable temperature differences along the thickness of the wall of parts to be quenched can be achieved by applying multi-step quenching. Software and hardware have been developed to govern the process.


    Paper ID: JAI101776

    DOI: 10.1520/JAI101776

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    Author
    Title An Overview of Technology and Equipment for Hardening of Large Steel Parts
    Symposium , 0000-00-00
    Committee A01