Applications of electron probe microanalyser(EPMA) to the strengthening mechanism of moulds with coatings are illustrated by examples.By introducing X-ray spots-figure analytical principle of electron probe as well as the component analytical approach for point

line and section of X-ray spectrometer

the measurements characteristics of wave dispersive spectrometer(WDS) and energy dispersive spectrometer(EDS) are comparatively studied.Electroplating hard chromium coating for induced diffusing strengthening on the surface of injection mould is investigated.The results show that mutual diffusion of elements occurs between the coating and the substrate indicating the metallurgic bonding formed in the process of induced heating.