Abstract
The spark electric discharge optical emission spectrometry has been widely applied to a rapid multielemental analysis of acid soluble elements and insoluble inclusions separately in several minutes in the field of molten steel making processes. In this study, we propose new state analysis method for acid soluble components and acid insoluble inclusions contained in a steel sample during the spark discharge. The developed new method includes the statistical processing of the emission intensity for every pulse during performing spark electric discharge to create a PSA (Pulse Sorting Analysis) graph, in which amounts of emission intensities are sorted on the abscissa according to the pulse height. It was found that multiplying the number of pulses by the 50% intermediate order height gives the representation of Total (acid soluble+insoluble components), subtract total volume from all integral area gives the acid insoluble inclusions volume (Insol.) and subtract acid insoluble inclusions volume from Total volume gives the acid soluble volume (Sol.). These findings led us a more accurate analysis value and expand the application range of insoluble inclusions volume percent at spark discharge analysis.
