TITLE

Assessment of Quench Severity of Vegetable Oil Blends for Heat Treatment of Steels

AUTHOR(S)
Narayan, Prabhu K.; Krishna, Shiva; Fernandes, Peter
PUB. DATE
July 2009
SOURCE
CURIE Journal;2009, Vol. 2 Issue 2, p28
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
An investigation was carried out to study the suitability of vegetable oil blends with mineral oil as quench media for industrial heat treatment. Soyabean oil, rice bran oil, gingelly oil were blended with mineral oil (servoquench 11). A stainless steel probe of diameter 12mm and height 60mm was used to determine the cooling intensities of pure oils and their b lends. Time varying heat transfer coefficients were determined using a lumped heat capacitance model. Heat transfer coefficient is a measure of the severity of the quench medium. Quench severity of vegetable oils was found to be better than the conventional mineral oil. Among the vegetable oil blends, the oil blend consisting of 40% mineral and 60% soyabean oils showed higher severity of quenching as compared to other blends. Wetting characteristics of oils were assessed using a dynamic contact angle analyzer and were found to be in good agreement with their severity of quenching.
ACCESSION #
43385697

 

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