Abstract
As part of a project to identify nondestructive techniques to determine the surface hardness and case depth of carburized steel, Meandering Winding Magnetometers (MWM) measurements were evaluated. MWM technology is based on eddy current testing. Compared to traditional eddy current testing, MWM measurements integrate the generating coil and detection coil into a thin, flexible sensor that can be applied to complex geometries. Conductivity and permeability are measured with MWM equipment to evaluate the properties of carburized steel. For this study, samples of 8620 were carburized to selected hardness and case depths. MWM technology was determined to be an effective method to detect surface hardness. The results of this study are presented and discussed in this paper.
