You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.

    If you are an ASTM Compass Subscriber and this document is part of your subscription, you can access it for free at ASTM Compass

    Enhancement and Local Regulation of Metal Quenching Using Atomized Sprays

    Published: 01 January 2010

      Format Pages Price  
    PDF (968K) 13 $25   ADD TO CART
    Complete Source PDF (46M) 1072 $242   ADD TO CART

    Cite this document

    X Add email address send
      .RIS For RefWorks, EndNote, ProCite, Reference Manager, Zoteo, and many others.   .DOCX For Microsoft Word


    In atomized spray quenching, the spraying water is atomized into fine droplets of the size of about 20 μm by compressed air and sprayed onto a hot surface. Only single droplets touch the surface, become deformed, and transfer heat. The drops partially evaporate and then move away from the superposed airflow. Thus, the vapor film is avoided as it is the case for other quenching techniques. It is demonstrated that the unintended collapses of the vapor film (Leidenfrost problem) at edges, corners, roughness peaks, etc., is eliminated by this technique. In this way, mass lumped regions of work pieces can be cooled more intensively than the edges. Consequently, a uniform temperature distribution with reduced thermal stresses can be obtained. The heat transfer was measured by infrared thermography. One side of the metallic sheet of 3 mm thickness was quenched by atomized spray and the surface temperature was measured on other side by an IR camera. The heat transfer coefficient is mainly determined by the impingement density. Heat transfer coefficient of 10,000 W/m2/K can be achieved within film boiling regime. This value is about three times higher than that of conventional spray quenching.


    atomized spray quenching, Leidenfrost problem, infrared thermography

    Author Information:

    Alam, Umair
    Otto-von-Guericke-University Magdeburg, Magdeburg,

    Krol, Jacek
    Otto-von-Guericke-University Magdeburg, Magdeburg,

    Specht, Eckehard
    Otto-von-Guericke-University Magdeburg, Magdeburg,

    Schmidt, Jürgen
    Otto-von-Guericke-University Magdeburg, Magdeburg,

    Committee/Subcommittee: D02.02

    DOI: 10.1520/STP49145S