QUANTITATIVE MEASURING METHOD AND APPARATUS OF METAL PHASE USING X-RAY DIFFRACTION METHOD, AND METHOD FOR MAKING PLATED STEEL SHEET USING THEM

摘要

A quantitative measuring method and apparatus of a metal phase contained in a plated layer using an X-ray diffraction method, and a method for making a plated steel sheet using them. The measuring precision can be improved to find an application to an on-line measurement by increasing the intensity of an X-ray diffracted from the metal phase contained in the plated layer. The diffracted X-ray from the metal phase is measured either over a predetermined range or at a plurality of positions on the Debye ring to increase the intensity of the diffracted X-ray thereby to improve the measurement precision. Moreover, the X-ray beam emitted from an X-ray source is compressed or made monochromatic or parallel to increase the intensity of the diffracted X-ray thereby to improve the measurement precision. The method and apparatus are utilized especially for measuring the alloying degree of a molten zinc plating.