残存状態判定方法及び残存状態判定装置

Title:

残存状態判定方法及び残存状態判定装置

Document Type and Number:

Japanese Patent JP7150640

Kind Code:

B2

Abstract:

To provide a surface state determination method and a surface state determination device which can accurately determine a surface state of a hot-rolled steel sheet after pickling.SOLUTION: A surface state determination method according to the present invention determines a surface state of a hot-rolled steel sheet after pickling. The surface state determination method comprises: an irradiation step of performing irradiation of a surface of the steel sheet with non-single-wavelength light; a light receiving step of receiving reflected light of the irradiation emitted from the surface of the steel sheet; and a determination step of determining the surface state on the basis of the reflected light obtained in the light receiving step. In the determination step, a color tone index which is an index of a color tone of the reflected light is calculated and acceptance/rejection of the surface state of the hot-rolled steel sheet after pickling is determined from a result of a comparison between the calculated color tone index and a threshold value of the color tone index set for each of pickling conditions of the hot-rolled steel sheet.SELECTED DRAWING: Figure 3

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Inventors:

Takeshi Iijima

Application Number:

JP2019043437A

Publication Date:

October 11, 2022

Filing Date:

March 11, 2019

Export Citation:

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