Determination of quenching and tempering conditions using hardenability prediction

Experimental prediction of Jominy hardenability using Just's equations often result in significant errors when compared to experimental data. In this paper, the development of an alternative Jominy predictor which provides excellent agreement with experimental data will be described. This new relationship can be written as: J(x) = Jo + F(x) Where Jo is exclusively a function of the concentration of the alloying elements. This equation has been experimentally validated and a relationship with the tempering temperature was found: Tempering = F(Jo) The development of these equations and their successful application to the selection of quenching and tempering conditions in the heat treat shop will be discussed.