Influence of External Factors on the Cooling Ability of Vacuum Quenching Oils

    (Received 21 December 2013; accepted 24 March 2014)

    Published Online: 2014

    CODEN: MPCOAD

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    Abstract

    This paper presents research on vacuum quenching oils at different pressure conditions during the cooling stage of the heat treatment process. The aim of this work is to reveal the influence of the pressure, agitation (laminar or turbulent flow), and oil temperature on the cooling oil. Medium and low viscosity oils are investigated. The research is novel because it expands knowledge of quenching oil behavior at low and high pressure conditions (from 1 mbar to 2.5·103 mbars). The findings are presented as integral diagrams (time-temperature and cooling rate versus temperature curves) and tables of the local cooling ability valuations. It is found that the pressure in the chamber is the main factor that influences the cooling ability of the examined media. The trend of pressure influence can be generalised as: the greater the cooling oil ability, the stronger the pressure value influence. In addition to the above, the possibility of routine change of the pressure makes it a prospective factor to control the cooling oil ability.


    Author Information:

    Gospodinov, Danail
    University of Ruse, Materials Science and Technology, Ruse,

    Nikolova, Maria
    University of Ruse, Materials Science and Technology, Ruse,

    Danev, Plamen
    University of Ruse, Materials Science and Technology, Ruse,


    Stock #: MPC20130110

    ISSN: 2165-3992

    DOI: 10.1520/MPC20130110

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    Author
    Title Influence of External Factors on the Cooling Ability of Vacuum Quenching Oils
    Symposium , 0000-00-00
    Committee A01