On Fluorescent X-Ray Analysis of Phosphor and Sulphur in Steels

Abstract

Analysis of phosphor and sulphur in steels by bluorescent X-ray was studied. For furnace control, they can be analysed simultaneously with elements of high atomic number, using tungsten target tube. Effects of crystal, collimator, setting condition of pulse height analyser, and others were studied, and precision of 0.0016% at 0.007% P and 0.0011% at 0.007% S was obtained. Heat treatments of samples have no affect on X-ray intensity and 0.001% of differece in sulphur is measured between rolled or forged samples and cast samples. The working curves of phosphor and sulphur were studied, and overlapping of Mo on SKα was corrected simply. Accuracy obtained in analysis of carbon-and low alloy-steels was 0.0023% for sulphur and 0.0017% for phosphor.