| 摘要 |
PURPOSE:To measure an alloying degree with good accuracy and to enhance the automatic control accuracy of the alloying degree, by measuring the temp. of a steel plate at a predetermined point and allowing X-rays to be incident to the surface of the steel plate to measure the diffraction X-ray intensity of a surface alloy phase. CONSTITUTION:At a predetermined point after the alloying heat treatment furnace in the manufacturing line of an alloyed molten zinc plated steel plate but before a skin pass process and a leveling process, the temp. of the steel plate is measured in such a state the temp. of the alloyed molten zinc plated steel plate is set to a temp. range of + or -15 deg.C in a range of room temp. - 50 deg.C or in a range of above 50 deg.C-400 deg.C. At the same point, X-rays are incident to the surface of the steel plate to measure the diffraction X-ray intensity of the alloy phase on the surface of the steel plate. The alloying degree in an alloy phase is calculated from these measured results, the preliminarily calculated temp. of the steel plate and X-ray diffraction intensity and the corresponding relation of the diffraction X-ray intensity and the alloying degree.
|
