SURFACE QUALITY DETECTION METHOD

PROBLEM TO BE SOLVED: To provide a surface quality detection method capable of accurately determining surface quality of a hot rolled steel sheet surface after acid cleaning.SOLUTION: The surface quality detection method for detecting surface quality of a hot rolled steel sheet surface after acid cl...

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Bibliographische Detailangaben
Hauptverfasser:	IIJIMA TAKEYUKI, KOBAYASHI MASAYOSHI, YASUTAKE NOBUHARU, INUI MASAHIRO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS PHYSICS TESTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a surface quality detection method capable of accurately determining surface quality of a hot rolled steel sheet surface after acid cleaning.SOLUTION: The surface quality detection method for detecting surface quality of a hot rolled steel sheet surface after acid cleaning includes the steps of irradiating the hot rolled steel sheet surface with light which is not signal-wavelength light, receiving reflectance from the hot rolled steel sheet surface and determining surface quality on the basis of the reflectance obtained in the light receiving step. In the determination step, the ratio between brightness in a first wavelength range, of the reflectance, and brightness in a second wavelength range different from the first wavelength range is calculated.SELECTED DRAWING: Figure 2 【課題】本発明は、酸洗後の熱延鋼板表面の表面性状を正確に判定できる表面性状検査方法を提供することを課題とする。【解決手段】本発明に係る表面性状検査方法は、酸洗後の熱延鋼板に対する表面性状の検査方法であって、上記鋼板表面に単波長でない光を照射する工程と、上記鋼板表面からの反射光を受光する工程と、上記受光工程で得られた反射光に基づき表面性状を判定する工程とを備え、上記判定工程で、上記反射光のうち第１波長範囲の輝度の上記第１波長範囲とは異なる第２波長範囲の輝度に対する比率を算出することを特徴とする。【選択図】図２