Abstract

For the case of laser surface-melt hardening, a mathematical model was used to determine the temperature profiles in gray and nodular iron and the depth of the modified layer. The temperature distributions and temperature gradients are presented for the studied depths. The mathematically obtained results ate critically assessed and compared with the results in die experiments. The microstructural changes which can be predicted from the temperature profiles on heating and cooling arc confirmed by microhardness measurements. It was found that in some heal treatment conditions, deviations occur between die mathematical model and experimental results. The factors causing these deviations are analysed and explained.

© 1996 IEEE