ON-LINE PHASE AND ALLOYING DEGREE MEASUREMENT SYSTEM FOR GALVANNEALED COATINGS

Jae-Hwa Hong, Jeong-Mok Kim, Eun-Do Kim, Gi-Deok Park, Kyu-Sam Hwang, Soon-Ju Kwon

Abstract

An on-line measurement system for phase fraction and alloying degree of galvannealed steel has been developed using an X-ray diffraction method. Intensities of diffraction peaks of Γ, δ, ζ and η iron-zinc phases were utilized for the determination of each phase fraction and alloying degree. Calibration curves were constructed using laboratory prepared standard reference samples and multiple regression technique. The system has been employed in POSCO’s galvannealing line at Kwang Yang Works for process monitoring.

Keywords

galvannealed steel, alloying degree, iron-zinc inter-metallic phase

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PWC-2003-TC14-031.pdf

DOI

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IMEKO TC

TC14 - Measurement of Geometrical Quantities

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