KR960023193A - Method for measuring non-contact alloying degree of hot-dip galvanized steel sheet - Google Patents

Method for measuring non-contact alloying degree of hot-dip galvanized steel sheet Download PDF

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Publication number
KR960023193A
KR960023193A KR1019940040289A KR19940040289A KR960023193A KR 960023193 A KR960023193 A KR 960023193A KR 1019940040289 A KR1019940040289 A KR 1019940040289A KR 19940040289 A KR19940040289 A KR 19940040289A KR 960023193 A KR960023193 A KR 960023193A
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South Korea
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degree
alloying
steel sheet
incident
alloying degree
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KR1019940040289A
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Korean (ko)
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KR0146871B1 (en
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임충수
김달우
이상진
Original Assignee
김만제
포항종합제철 주식회사
신창식
재단법인 산업과학기술연구소
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Priority to KR1019940040289A priority Critical patent/KR0146871B1/en
Publication of KR960023193A publication Critical patent/KR960023193A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/171—Systems in which incident light is modified in accordance with the properties of the material investigated with calorimetric detection, e.g. with thermal lens detection
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06—Zinc or cadmium or alloys based thereon
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/1717—Systems in which incident light is modified in accordance with the properties of the material investigated with a modulation of one or more physical properties of the sample during the optical investigation, e.g. electro-reflectance
    • G01N2021/1725—Modulation of properties by light, e.g. photoreflectance

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Coating With Molten Metal (AREA)

Abstract

레이저를 이용하여 용융아연도금강판의 합금화도를 비접촉식으로 측정하는 방법으로서, 레이저광을 도금층 표면에 입사시키고, 그 도금층 표면에서 반사되는 레이저광의 세기를 2개의 반사각도에서 동시에 측정한 후 이 두 측정값으로부터 표면 거칠기를 나타내는 변수를 제거하여 합금화도에 따른 반사도값을 구하고, 그 반사도값으로부터 반사도값과 합금화도의 관계를 이용하여 합금화도를 구한다.A method of non-contact measurement of alloying degree of a hot-dip galvanized steel sheet using a laser. The laser beam is incident on the surface of the plating layer, and the intensity of the laser light reflected from the surface of the plating layer is simultaneously measured at two reflection angles. The reflectance value according to the degree of alloying is obtained by removing the variable representing the surface roughness from the value, and the degree of alloying is obtained using the relationship between the reflectance value and the degree of alloying from the reflectance value.

레이저광을 도금층표면에 입사시키기 전에 빛살가르개로 둘로 갈라, 그 하나는 레이져 출력변화에 대한 보정용으로 이용하고 나머지를 도금층 표면에 입사시켜 상기와 같이 합금화도를 구할 수도 있다.Before the laser light is incident on the surface of the plating layer, the light splitter may be divided into two parts, one of which may be used for correction of the laser output change, and the other may be incident on the surface of the plating layer to obtain an alloying degree as described above.

이 방법은 2개의 반사각도에서 반사광을 측정함으로써 표면 거칠기에 의한 측정오차를 제거하여 측정정밀도를 높일 수 있으며, 아울러 간단한 측정장치를 사용하여 합금화도를 정량측정한다는 잇점도 있다.This method eliminates measurement errors due to surface roughness by measuring the reflected light at two reflection angles, thereby increasing the measurement accuracy, and also has the advantage of quantitatively measuring alloying degree using a simple measuring device.

Description

용융아연도금 강판의 비접촉식 합금화도 측정방법Method for measuring non-contact alloying degree of hot-dip galvanized steel sheet

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 용융아연도금강판의 비접촉식 합금화도 측정방법을 도시한 개략도,1 is a schematic view showing a method of measuring a non-contact alloying degree of a hot-dip galvanized steel sheet,

제2도는 본 발명의 측정에 사용된 합금화 용융아연도금강판의 합금화도에 따른 표면거칠기 분포를 나타낸 그래프.2 is a graph showing the surface roughness distribution according to the degree of alloying of the alloyed hot-dip galvanized steel sheet used in the measurement of the present invention.

Claims (2)

레이저광을 도금강판의 도금층표면에 입사시키고, 그 도금층 표면에서 반사되는 레이저 광의 세기를 2개의 반사각도에서 동시에 측정검출한 후, 이 두 측정값으로부터 표면 거칠기를 나타내는 공통변수를 상쇄하여 합금화도에 따른 반사도값을 얻고, 그렇게 얻은 반사도값으로부터 반사도값과 합금화도의 선형적 관계로부터 합금화도를 구함을 특징으로 하는 용융아연 도금강판의 비접촉식 합금화도 측정방법.The laser beam is incident on the surface of the plated layer of the plated steel sheet, and the intensity of the laser light reflected from the surface of the plated layer is simultaneously measured and detected at two reflection angles. Then, the common variable representing the surface roughness is canceled from these two measured values. A method for measuring a non-contact alloying degree of a hot-dip galvanized steel sheet, characterized in that the reflectivity value is obtained, and the alloying degree is obtained from the linear relationship between the reflectance value and the alloying degree. 1항에 있어서, 상기 레이저 광을 조사후 빛살 가르개로 둘로 나누어 하나는 레이저 출력변화에 대한 보정용 광으로 사용하고, 나머지 하나는 도금강판의 도금층표면에 입사시킴을 특징으로 하는 방법.The method of claim 1, wherein the laser light is divided into two parts after the irradiation, and one is used as a correction light for the laser output change, and the other is incident on the plating layer surface of the plated steel sheet. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940040289A 1994-12-31 1994-12-31 Non-contacting type measuring method of alloying degree for the zn hot dipped steel sheet KR0146871B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940040289A KR0146871B1 (en) 1994-12-31 1994-12-31 Non-contacting type measuring method of alloying degree for the zn hot dipped steel sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940040289A KR0146871B1 (en) 1994-12-31 1994-12-31 Non-contacting type measuring method of alloying degree for the zn hot dipped steel sheet

Publications (2)

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KR960023193A true KR960023193A (en) 1996-07-18
KR0146871B1 KR0146871B1 (en) 1998-11-02

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