JPH01177352A - Production of alloyed hot dip galvanized steel sheet - Google Patents
Production of alloyed hot dip galvanized steel sheetInfo
- Publication number
- JPH01177352A JPH01177352A JP10288A JP10288A JPH01177352A JP H01177352 A JPH01177352 A JP H01177352A JP 10288 A JP10288 A JP 10288A JP 10288 A JP10288 A JP 10288A JP H01177352 A JPH01177352 A JP H01177352A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- galvanized steel
- hot dip
- dip galvanized
- coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910001335 Galvanized steel Inorganic materials 0.000 title claims abstract description 15
- 239000008397 galvanized steel Substances 0.000 title claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- 230000006698 induction Effects 0.000 claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 10
- 239000010959 steel Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 8
- 238000007747 plating Methods 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 7
- 239000011701 zinc Substances 0.000 abstract description 7
- 229910052725 zinc Inorganic materials 0.000 abstract description 7
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000005246 galvanizing Methods 0.000 abstract description 2
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000008961 swelling Effects 0.000 abstract 1
- 238000005275 alloying Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
Landscapes
- Coating With Molten Metal (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は溶融亜鉛めっき後の合金化加熱を誘導加熱に
より行う合金化亜鉛めっき鋼板の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for manufacturing an alloyed galvanized steel sheet in which alloying heating after hot-dip galvanizing is performed by induction heating.
（従来の技術）
合金化加熱は従来バーナー加熱により行われていたが、
最近に至り急速加熱が可能で応答性の良い誘導加熱を利
用した合金化加熱が特公昭５２−４８３４２号公報や特
開昭６１−２０７５６１号公報に提案されている。(Conventional technology) Alloying heating was conventionally performed by burner heating,
Recently, alloying heating using induction heating, which allows rapid heating and has good response, has been proposed in Japanese Patent Publication No. 48342/1982 and Japanese Patent Application Laid-open No. 207561/1982.
（発明が解決しようとする問題点）
実際に誘導加熱を溶融亜鉛めっき鋼板の合金化加熱に用
いた場合、鋼板の長手方向に沿って縦縞模様が発生する
という欠点がある。(Problems to be Solved by the Invention) When induction heating is actually used for alloying heating of a hot-dip galvanized steel sheet, there is a drawback that a vertical striped pattern occurs along the longitudinal direction of the steel sheet.
特公昭５２−４８３４．２号公報では、加熱コイルを斜
めに配置することにより、また特開昭６１−２０７５６
１号公報は、加熱帯を複数に区画し、誘導加熱コイルへ
の投入周波数を２種以上使用することにより縦縞模様を
解消できることを開示している。In Japanese Patent Publication No. 52-4834.2, the heating coil is arranged diagonally, and in Japanese Patent Publication No. 61-20756,
Publication No. 1 discloses that the vertical striped pattern can be eliminated by dividing the heating zone into a plurality of sections and using two or more types of input frequencies to the induction heating coil.
しかしこのような方法でも加熱条件によっては縦縞が発
生することが有り、完全な解決策となっていないことが
判った。However, even with this method, vertical stripes may occur depending on the heating conditions, and it has been found that this method is not a perfect solution.
そこで、このような縦縞模様の発生をより有効に防止し
得る高周波誘導加熱合金化亜鉛めっき鋼板の製造方法を
与えることがこの発明の目的である。Therefore, it is an object of the present invention to provide a method for manufacturing a high-frequency induction heating alloyed galvanized steel sheet that can more effectively prevent the occurrence of such vertical striped patterns.
（問題点を解決するための手段）
縦縞は誘導加熱後半において、溶融状態の亜鉛表面に縞
状の盛り上がりが生じることに起因する。(Means for Solving the Problems) The vertical stripes are caused by the formation of striped bulges on the surface of molten zinc during the latter half of induction heating.
この現象は誘導加熱コイル内の磁束が不均一になること
によるもので、誘導コイル後半の磁束密度を高くするこ
とにより解消することができることが見出された。It has been found that this phenomenon is caused by the magnetic flux within the induction heating coil becoming non-uniform, and can be resolved by increasing the magnetic flux density in the latter half of the induction coil.
この知見に基づき、この発明は 鋼板をめっき浴に浸漬
してめっきを施した後加熱する合金化亜鉛めっき鋼板の
製造方法において、
鋼板の加熱手段として高周波誘導加熱を用い、この誘導
コイルの出側後半に、誘導加熱コイル以外の磁力発生装
置を配置すること
を特徴とする合金化亜鉛めっき鋼板の製造方法である。Based on this knowledge, the present invention provides a method for manufacturing an alloyed galvanized steel sheet in which a steel sheet is immersed in a plating bath, plated, and then heated, using high-frequency induction heating as a heating means for the steel sheet, and This method of producing an alloyed galvanized steel sheet is characterized in that a magnetic force generating device other than the induction heating coil is disposed in the second half.
第１図にこの発明を実施するための合金化処理装置を、
模式図に示した。Figure 1 shows an alloying treatment apparatus for carrying out this invention.
Shown in the schematic diagram.
鋼板１はめっき浴２に浸漬後ジンクロール３を経て引き
上げられ、ワイピングノズル４により付着量を調整した
後合金化処理装置に送られる。After being immersed in a plating bath 2, the steel plate 1 is pulled up through a zinc roll 3, and after adjusting the coating amount with a wiping nozzle 4, it is sent to an alloying treatment device.
合金化処理装置は誘導加熱コイル５、保持帯６、冷却帯
７から構成され、と（に誘導加熱コイル５の後半には、
鋼板１をはさんで磁石８を設ける。The alloying treatment apparatus is composed of an induction heating coil 5, a holding zone 6, and a cooling zone 7, and (in the latter half of the induction heating coil 5,
A magnet 8 is provided across the steel plate 1.
磁石は永久磁石、電磁石のいずれでも良い。図中９はト
ップロールである。The magnet may be either a permanent magnet or an electromagnet. 9 in the figure is the top roll.
（作 用）
この例で磁石８、すなわち誘導加熱コイル以外の磁力発
生装置によって溶融状態の亜鉛表面上の縞状盛り上がり
がなくなり、めっき鋼板の縦縞模様が解消される。(Function) In this example, the magnet 8, that is, the magnetic force generating device other than the induction heating coil, eliminates the striped ridges on the surface of the molten zinc, and eliminates the vertical striped pattern on the plated steel sheet.
（発明の効果）
この発明により、誘導加熱を合金化処理に用いても、縦
縞模様の発生が無く、バーナー加熱と同等の表面性状を
有する合金化亜鉛めっき鋼板の製造が可能となる。(Effects of the Invention) According to the present invention, even if induction heating is used for alloying treatment, it is possible to produce an alloyed galvanized steel sheet that does not generate a vertical striped pattern and has the same surface properties as burner heating.
（実施例）
第１図に示す合金化処理装置を用いて、鋼板の溶融亜鉛
めっきおよび合金化処理を行った、誘導加熱コイルへの
投入周波数は１０ ｋＨｚとし、磁石８には永久磁石を
用いた。亜鉛の付着量は６０ｇ／ｍ”とした。(Example) A steel plate was hot-dip galvanized and alloyed using the alloying treatment apparatus shown in FIG. 1. The input frequency to the induction heating coil was 10 kHz, and a permanent magnet was used as the magnet 8. there was. The amount of zinc deposited was 60 g/m''.
表１に合金化条件と表面性状を示す。比較例は８の磁石
のみを外し、他の条件を同一にした場合である。Table 1 shows the alloying conditions and surface properties. A comparative example is a case in which only magnet No. 8 is removed and other conditions are the same.
（発明の効果）
これから明らかにこの発明の実施例では縦縞模様の発生
は認められず、合金化ムラも無く、均一な表面外観の合
金化溶融亜鉛めっき鋼板が製造できる。(Effects of the Invention) It is clear from this that in the examples of the present invention, no vertical striped pattern was observed, there was no uneven alloying, and an alloyed hot-dip galvanized steel sheet with a uniform surface appearance could be produced.
第１図は合金化処理装置の模式図である。 ５・・・誘導加熱コイル ８・・・磁石 特許出願人 川崎製鉄株式会社 第１図 FIG. 1 is a schematic diagram of an alloying treatment apparatus. 5...Induction heating coil 8...Magnet Patent applicant: Kawasaki Steel Corporation Figure 1
Claims (1)
る合金化亜鉛めっき鋼板の製造方法において、 鋼板の加熱手段として高周波誘導加熱を用い、この誘導
コイルの出側後半に、誘導加熱コイル以外の磁力発生装
置を配置すること を特徴とする合金化亜鉛めっき鋼板の製造方法。[Claims] 1. A method for manufacturing an alloyed galvanized steel sheet in which a steel sheet is immersed in a plating bath, plated, and then heated, using high-frequency induction heating as a heating means for the steel sheet, A method for manufacturing an alloyed galvanized steel sheet, characterized in that a magnetic force generator other than an induction heating coil is placed in the second half.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10288A JPH01177352A (en) | 1988-01-05 | 1988-01-05 | Production of alloyed hot dip galvanized steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10288A JPH01177352A (en) | 1988-01-05 | 1988-01-05 | Production of alloyed hot dip galvanized steel sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01177352A true JPH01177352A (en) | 1989-07-13 |
Family
ID=11464731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10288A Pending JPH01177352A (en) | 1988-01-05 | 1988-01-05 | Production of alloyed hot dip galvanized steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01177352A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009221500A (en) * | 2008-03-13 | 2009-10-01 | Nippon Steel Corp | Method and device for producing hot dip galvanized steel strip |
-
1988
- 1988-01-05 JP JP10288A patent/JPH01177352A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009221500A (en) * | 2008-03-13 | 2009-10-01 | Nippon Steel Corp | Method and device for producing hot dip galvanized steel strip |
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