| abstract |
(57) [Problem] To quickly measure the composition and particle size of nonmetallic inclusions present in steel or nonferrous metal. SOLUTION: The composition and / or particle size of nonmetallic inclusions present on a metal surface and / or inside are determined by laser excitation-IC. Quantify by P analysis. Preferably, a sample cut out of steel or non-ferrous metal, or a large lump sample is irradiated with laser light to evaporate inclusions, then ionized in a high-temperature inductively coupled plasma, and the number of generated ions is measured by mass. Measure with an analyzer or emission spectrophotometer, The peaks due to inclusions are integrated from the time curve of the spectrum for each element to obtain the peak. |