JP2010014721A5 - - Google Patents
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- JP2010014721A5 JP2010014721A5 JP2009198198A JP2009198198A JP2010014721A5 JP 2010014721 A5 JP2010014721 A5 JP 2010014721A5 JP 2009198198 A JP2009198198 A JP 2009198198A JP 2009198198 A JP2009198198 A JP 2009198198A JP 2010014721 A5 JP2010014721 A5 JP 2010014721A5
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- oxide film
- dip galvanized
- galvanized steel
- steel sheet
- hot dip
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- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 58
- 239000008397 galvanized steel Substances 0.000 claims description 58
- 238000003908 quality control method Methods 0.000 claims description 30
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 238000011002 quantification Methods 0.000 claims description 9
- 230000001133 acceleration Effects 0.000 claims description 8
- 230000000875 corresponding Effects 0.000 claims description 8
- 238000010894 electron beam technology Methods 0.000 claims description 8
- 238000011156 evaluation Methods 0.000 claims description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 6
- 239000011701 zinc Substances 0.000 claims description 6
- 229910052725 zinc Inorganic materials 0.000 claims description 6
- 238000007747 plating Methods 0.000 claims description 5
- 230000001678 irradiating Effects 0.000 claims description 3
- 239000010960 cold rolled steel Substances 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
Description
上記課題を解決する本発明の特徴は次のとおりである。
（１）検査対象の溶融亜鉛系めっき鋼板と同じ酸化物種で膜厚の異なる酸化膜を有する溶融亜鉛系めっき鋼板の酸化膜厚を測定するステップと、前記溶融亜鉛系めっき鋼板の表面に０．１〜５ｋＶのなかから選ばれる加速電圧で加速された電子ビームを照射し、その２次電子像を得る観察ステップ１と、２次電子像の明るさを明るさ数値として数値化する数値化ステップ１と、溶融亜鉛系めっき鋼板の表面の酸化膜厚と明るさ数値との関係を求め、その関係から、予め酸化膜厚が所定範囲となる明るさ数値範囲を求めるステップと、
検査対象の溶融亜鉛系めっき鋼板の表面に、前記観察ステップ１と同じ加速電圧で加速された電子ビームを照射し、その２次電子像を得る観察ステップ２と、２次電子像の明るさを明るさ数値として数値化する数値化ステップ２と、得られた明るさ数値が、酸化膜厚が所定範囲となる明るさ数値範囲に入るか否かにより、前記溶融亜鉛系めっき鋼板がその表面に所定膜厚の酸化膜を有しているか否かを判定する判定ステップと
を有することを特徴とする、表面に酸化膜を有する溶融亜鉛系めっき鋼板の品質管理方法。
The features of the present invention that solve the above problems are as follows.
(1) A step of measuring the oxide film thickness of a hot dip galvanized steel sheet having an oxide film of the same oxide type and different thickness as the hot dip galvanized steel sheet to be inspected; An observation step 1 for irradiating an electron beam accelerated with an acceleration voltage selected from 1 to 5 kV to obtain a secondary electron image thereof, and a quantification step for quantifying the brightness of the secondary electron image as a brightness value 1 and determining the relationship between the oxide film thickness on the surface of the hot dip galvanized steel sheet and the brightness value, and determining the brightness value range in which the oxide film thickness is in a predetermined range from the relationship;
The surface of the hot dip galvanized steel sheet to be inspected is irradiated with an electron beam accelerated at the same acceleration voltage as in the observation step 1, and the observation step 2 for obtaining the secondary electron image and the brightness of the secondary electron image are set. The hot-dip galvanized steel sheet is formed on the surface depending on whether or not the numerical value step 2 for quantifying the brightness value and whether or not the obtained brightness value falls within a brightness value range where the oxide film thickness falls within a predetermined range. A quality control method for a hot-dip galvanized steel sheet having an oxide film on its surface, comprising: a determination step for determining whether or not the oxide film has a predetermined thickness .
（２）前記酸化膜厚が所定範囲となる明るさ数値範囲は酸化膜厚さが２０ｎｍ以上となる明るさ数値範囲とすることを特徴とする、（１）に記載の表面に酸化膜を有する溶融亜鉛系めっき鋼板の品質管理方法。(2) The brightness numerical value range in which the oxide film thickness is in a predetermined range is a brightness numerical value range in which the oxide film thickness is 20 nm or more. Quality control method for hot dip galvanized steel sheet.
（３）前記酸化膜厚が所定範囲となる明るさ数値範囲は酸化膜厚さが３０ｎｍ以上となる明るさ数値範囲とすることを特徴とする、（１）に記載の表面に酸化膜を有する溶融亜鉛系めっき鋼板の品質管理方法。(3) The brightness numerical value range in which the oxide film thickness is in a predetermined range is a brightness numerical value range in which the oxide film thickness is 30 nm or more. The oxide film on the surface according to (1), Quality control method for hot dip galvanized steel sheet.
（４）前記数値化ステップ１、２はめっき表面の平坦部の２次電子像の明るさを数値化することを特徴とする、（１）乃至（３）のうちの何れかに記載の表面に酸化膜を有する溶融亜鉛系めっき鋼板の品質管理方法。(4) The surface according to any one of (1) to (3), wherein the numericalizing steps 1 and 2 digitize the brightness of the secondary electron image of the flat portion of the plating surface. Quality control method for hot dip galvanized steel sheet with oxide film on the surface.
（５）前記数値化ステップ１、２はめっき表面の平坦部と非平坦部の両方を含む領域の２次電子像の明るさを数値化することを特徴とする、（１）乃至（３）のうちの何れかに記載の表面に酸化膜を有する溶融亜鉛系めっき鋼板の品質管理方法。(5) The quantification steps 1 and 2 quantify the brightness of a secondary electron image in a region including both a flat portion and a non-flat portion of the plating surface. (1) to (3) The quality control method of the hot dip galvanized steel plate which has an oxide film on the surface in any one of these.
（６）検査対象の溶融亜鉛系めっき鋼板と同じ酸化物種で膜厚の異なる酸化膜を有する溶融亜鉛系めっき鋼板の酸化膜厚を測定するステップと、前記溶融亜鉛系めっき鋼板の表面に０．１〜５ｋＶのなかから選ばれる加速電圧で加速された電子ビームを照射し、表面から発生する２次電子量に対応した信号強度を測定して信号強度数値として数値化する数値化ステップ１と、溶融亜鉛系めっき鋼板の表面の酸化膜厚と信号強度数値との対応関係を求め、その関係から、予め酸化膜厚が所定範囲となる信号強度数値範囲を求めるステップと、(6) a step of measuring the oxide film thickness of a hot dip galvanized steel sheet having an oxide film of the same oxide type and different film thickness as the hot dip galvanized steel sheet to be inspected; A quantification step 1 in which an electron beam accelerated by an acceleration voltage selected from 1 to 5 kV is irradiated, a signal intensity corresponding to the amount of secondary electrons generated from the surface is measured and quantified as a signal intensity value; Obtaining a correspondence relationship between the oxide film thickness on the surface of the hot dip galvanized steel sheet and the signal intensity value, and obtaining a signal intensity value range in which the oxide film thickness is in a predetermined range from the relationship;
検査対象の溶融亜鉛系めっき鋼板の表面に、前記数値化ステップ１と同じ加速電圧で加速された電子ビームを照射し、表面から発生する２次電子量に対応した信号強度を測定して信号強度数値として数値化する数値化ステップ２と、得られた信号強度数値が、酸化膜厚が所定範囲となる信号強度数値範囲に入るか否かにより、前記溶融亜鉛系めっき鋼板がその表面に所定膜厚の酸化膜を有しているか否かを判定する判定ステップとを有するThe surface of the hot dip galvanized steel sheet to be inspected is irradiated with an electron beam accelerated at the same acceleration voltage as in the quantification step 1, and the signal intensity corresponding to the amount of secondary electrons generated from the surface is measured to obtain the signal intensity. The hot-dip galvanized steel sheet has a predetermined film on its surface, depending on whether or not the numerical value step 2 is converted into a numerical value and whether or not the obtained signal intensity value is in a signal intensity numerical range in which the oxide film thickness is in a predetermined range. And a determination step for determining whether or not the oxide film has a thick oxide film.
ことを特徴とする、表面に酸化膜を有する溶融亜鉛系めっき鋼板の品質管理方法。A quality control method for a hot dip galvanized steel sheet having an oxide film on its surface.
（７）前記酸化膜が所定範囲となる信号強度数値は酸化膜厚さが２０ｎｍ以上となる信号強度数値範囲とすることを特徴とする、（６）に記載の表面に酸化膜を有する溶融亜鉛系めっき鋼板の品質管理方法。(7) The molten zinc having an oxide film on the surface according to (6), wherein the numerical value of signal intensity in which the oxide film falls within a predetermined range is a signal intensity numerical range in which the oxide film thickness becomes 20 nm or more Quality control method for steel sheet.
（８）前記酸化膜が所定範囲となる信号強度数値は酸化膜厚さが３０ｎｍ以上となる信号強度数値範囲とすることを特徴とする、（６）に記載の表面に酸化膜を有する溶融亜鉛系めっき鋼板の品質管理方法。(8) The molten zinc having an oxide film on the surface according to (6), wherein the numerical value of the signal intensity in which the oxide film is in a predetermined range is a signal intensity numerical value range in which the oxide film thickness is 30 nm or more Quality control method for steel sheet.
（９）前記数値化ステップ１、２はめっき表面の平坦部から発生する２次電子量に対応した強度信号を数値化することを特徴とする、（６）乃至（８）のうちの何れかに記載の表面に酸化膜を有する溶融亜鉛系めっき鋼板の品質管理方法。(9) In any one of (6) to (8), the quantification steps 1 and 2 quantify an intensity signal corresponding to the amount of secondary electrons generated from a flat portion of the plating surface. The quality control method of the hot dip galvanized steel sheet which has an oxide film on the surface as described in 2.
（１０）前記数値化ステップ１、２はめっき表面の平坦部と非平坦部の両方を含む領域から発生する２次電子量に対応した強度信号を数値化することを特徴とする、（６）乃至（８）のうちの何れかに記載の表面に酸化膜を有する溶融亜鉛系めっき鋼板の品質管理方法。(10) The quantification steps 1 and 2 are characterized by quantifying an intensity signal corresponding to the amount of secondary electrons generated from a region including both a flat portion and a non-flat portion of the plating surface. (6) The quality control method of the hot dip galvanized steel sheet which has an oxide film on the surface in any one of thru | or (8).
（１１）鋼板を、溶融亜鉛めっきした後調質圧延を行い、又は溶融めっきした後合金化処理、調質圧延を行い、さらに酸化物形成処理を施してその表面に酸化膜を形成して溶融亜鉛系めっき鋼板を製造する製造ステップと、前記製造ステップで製造された溶融亜鉛系めっき鋼板に対して（１）乃至（１０）のうちの何れかに記載の方法で品質管理を行う評価ステップとを有することを特徴とする、表面に酸化膜を有する溶融亜鉛系めっき鋼板の製造方法。(11) The steel sheet is hot-dip galvanized and then temper-rolled, or hot-dip galvanized, then alloyed and temper-rolled, and further subjected to oxide formation to form an oxide film on the surface and melt. A manufacturing step for manufacturing a zinc-based plated steel sheet, and an evaluation step for performing quality control on the hot-dip galvanized steel sheet manufactured in the manufacturing step by the method according to any one of (1) to (10); The manufacturing method of the hot dip galvanized steel plate which has an oxide film on the surface characterized by having.
（１２）前記評価ステップで、溶融亜鉛系めっき鋼板が所定膜厚の酸化物を有すると判定したときは、該溶融亜鉛系めっき鋼板を所定の出荷対象とすることを特徴とする、（１１）に記載の表面に酸化膜を有する溶融亜鉛系めっき鋼板の製造方法。(12) In the evaluation step, when it is determined that the hot dip galvanized steel sheet has an oxide having a predetermined film thickness, the hot dip galvanized steel sheet is used as a predetermined shipping object. (11) The manufacturing method of the hot dip galvanized steel plate which has an oxide film on the surface of description.
（１３）前記評価ステップで、溶融亜鉛系めっき鋼板が所定膜厚の酸化物を有しないと判定したときは、前記製造ステップの酸化物形成処理の処理条件を、明るさ数値が所定範囲に入るように又は信号強度数値が所定範囲に入るように調整することを特徴とする、（１１）に記載の表面に酸化膜を有する溶融亜鉛系めっき鋼板の製造方法。(13) In the evaluation step, when it is determined that the hot dip galvanized steel sheet does not have an oxide having a predetermined film thickness, the brightness numerical value falls within a predetermined range as the oxide forming treatment condition of the manufacturing step. Or the method for producing a hot-dip galvanized steel sheet having an oxide film on the surface thereof according to (11), wherein the adjustment is performed so that the signal intensity value falls within a predetermined range.
（１４）表面に酸化物を有する溶融亜鉛系めっき鋼板に代えて、表面に酸化物を有する電気亜鉛系めっき鋼板について、（１）乃至（１０）のうちのいずれかの項に記載の方法で電気亜鉛系めっき鋼板の品質管理を行うことを特徴とする、電気亜鉛系めっき鋼板の品質管理方法。(14) In place of the hot dip galvanized steel sheet having an oxide on the surface, for the electrogalvanized steel sheet having an oxide on the surface, the method according to any one of (1) to (10) A quality control method for electrogalvanized steel sheets, characterized by performing quality control of electrogalvanized steel sheets.
（１５）表面に酸化物を有する溶融亜鉛系めっき鋼板に代えて、表面に酸化物を有する鋼板について、（１）乃至（１０）のうちのいずれかの項に記載の方法で冷延鋼板の品質管理を行うことを特徴とする、鋼板の品質管理方法。(15) Instead of the hot dip galvanized steel sheet having an oxide on the surface, the steel sheet having an oxide on the surface is subjected to the method described in any one of (1) to (10). A quality control method for steel sheets, characterized by performing quality control.
Claims (15)
検査対象の溶融亜鉛系めっき鋼板の表面に、前記観察ステップ１と同じ加速電圧で加速された電子ビームを照射し、その２次電子像を得る観察ステップ２と、２次電子像の明るさを明るさ数値として数値化する数値化ステップ２と、得られた明るさ数値が、酸化膜厚が所定範囲となる明るさ数値範囲に入るか否かにより、前記溶融亜鉛系めっき鋼板がその表面に所定膜厚の酸化膜を有しているか否かを判定する判定ステップと
を有することを特徴とする、表面に酸化膜を有する溶融亜鉛系めっき鋼板の品質管理方法。 A step of measuring the oxide film thickness of a hot dip galvanized steel sheet having an oxide film of the same oxide type as that of the hot dip galvanized steel sheet to be inspected, and 0.1-5 kV on the surface of the hot dip galvanized steel sheet An observation step 1 for irradiating an electron beam accelerated at an acceleration voltage selected from the above, obtaining a secondary electron image thereof, and a quantification step 1 for quantifying the brightness of the secondary electron image as a brightness value; Obtaining the relationship between the oxide film thickness on the surface of the hot dip galvanized steel sheet and the brightness value, and determining the brightness value range in which the oxide film thickness is in a predetermined range from the relationship ;
The surface of the hot dip galvanized steel sheet to be inspected is irradiated with an electron beam accelerated at the same acceleration voltage as in the observation step 1, and an observation step 2 for obtaining a secondary electron image thereof, and the brightness of the secondary electron image The hot-dip galvanized steel sheet is formed on the surface depending on whether or not the numerical value step 2 for quantifying the brightness value and whether or not the obtained brightness value falls within a brightness value range where the oxide film thickness falls within a predetermined range. A quality control method for a hot-dip galvanized steel sheet having an oxide film on a surface thereof. The method includes a determination step of determining whether or not the oxide film has a predetermined thickness .
検査対象の溶融亜鉛系めっき鋼板の表面に、前記数値化ステップ１と同じ加速電圧で加速された電子ビームを照射し、表面から発生する２次電子量に対応した信号強度を測定して信号強度数値として数値化する数値化ステップ２と、得られた信号強度数値が、酸化膜厚が所定範囲となる信号強度数値範囲に入るか否かにより、前記溶融亜鉛系めっき鋼板がその表面に所定膜厚の酸化膜を有しているか否かを判定する判定ステップとを有する
ことを特徴とする、表面に酸化膜を有する溶融亜鉛系めっき鋼板の品質管理方法。 A step of measuring the oxide film thickness of a hot dip galvanized steel sheet having an oxide film of the same oxide type as that of the hot dip galvanized steel sheet to be inspected, and 0.1-5 kV on the surface of the hot dip galvanized steel sheet A quantification step 1 of irradiating an electron beam accelerated at an acceleration voltage selected from among the above, measuring a signal intensity corresponding to the amount of secondary electrons generated from the surface, and quantifying the signal intensity numerical value; and a molten zinc system Obtaining a correspondence relationship between the oxide film thickness on the surface of the plated steel sheet and the signal intensity value, and obtaining a signal intensity value range in which the oxide film thickness is in a predetermined range from the relationship;
The surface of the hot dip galvanized steel sheet to be inspected is irradiated with an electron beam accelerated at the same acceleration voltage as in the quantification step 1, and the signal intensity corresponding to the amount of secondary electrons generated from the surface is measured to obtain the signal intensity. a digitizing step 2 to quantify as numbers, resulting signal strength value is, depending on whether the oxide film thickness enters the signal strength value ranges a predetermined range, the galvanized steel sheet a predetermined film on the surface A quality control method for a hot-dip galvanized steel sheet having an oxide film on its surface. The method includes a determination step of determining whether or not the oxide film has a thick oxide film.
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| JP2009198198A JP2010014721A (en) | 2009-08-28 | 2009-08-28 | Quality control method and manufacturing method of steel plate with oxide film on surface |
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| JP2009198198A JP2010014721A (en) | 2009-08-28 | 2009-08-28 | Quality control method and manufacturing method of steel plate with oxide film on surface |
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| JP2003335127A Division JP4411918B2 (en) | 2003-09-26 | 2003-09-26 | Quality control method and manufacturing method of steel sheet having oxide film on surface |
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| JP2010014721A JP2010014721A (en) | 2010-01-21 |
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| CN112085727B (en) * | 2020-09-17 | 2023-07-11 | 东北大学 | Intelligent identification method for oxide scale structure on surface of hot rolled steel |
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| JPS639807A (en) * | 1986-06-30 | 1988-01-16 | Nec Corp | Method and device for measuring film thickness |
| JPH0688794A (en) * | 1992-09-08 | 1994-03-29 | Sumitomo Metal Ind Ltd | Quality control system for descaling and pickling stainless steel material |
| JPH07173588A (en) * | 1993-12-03 | 1995-07-11 | Hiroyoshi Hayashi | Process controlling device of galvanizing plant for iron structure |
| JP3675313B2 (en) * | 1999-07-15 | 2005-07-27 | Ｊｆｅスチール株式会社 | Method for producing alloyed hot-dip galvanized steel sheet with excellent slidability |
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