Effect of Quench Start Temperature On Surface Heat Transfer Coefficients

To simulate the quenching process the surface heat transfer coefficient as a function of temperature plays the critical role in predicting temperature evolution accurately inside a quenched part.    In this study, an Inconel and SAE4140 steel quench probes are used to investigate the effect of quench start temperature on the heat transfer process and the subsequent surface heat transfer coefficient.  The results show that the heat transfer coefficient not only depends on the part surface temperature, but also on the initial temperature of the quenched part.  It was also determined that the decrease in quench start temperature shifts the temperature for maximum heat transfer coefficient to lower temperatures.