JP2602868B2 - Manufacturing method of alloyed galvanized steel sheet - Google Patents
Manufacturing method of alloyed galvanized steel sheetInfo
- Publication number
- JP2602868B2 JP2602868B2 JP10388A JP10388A JP2602868B2 JP 2602868 B2 JP2602868 B2 JP 2602868B2 JP 10388 A JP10388 A JP 10388A JP 10388 A JP10388 A JP 10388A JP 2602868 B2 JP2602868 B2 JP 2602868B2
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- galvanized steel
- alloyed galvanized
- heating
- manufacturing
- 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.)
- Expired - Lifetime
Links
Landscapes
- Coating With Molten Metal (AREA)
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。Description: TECHNICAL FIELD The present invention relates to a method for producing an alloyed galvanized steel sheet in which alloying heating after 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高周波誘
導加熱を利用した合金化処理が特公昭52−48342号公報
や、特開昭61−207561号公報に提案されている。(Prior art) Conventionally, alloying heating has been performed by burner heating, but recently, alloying processing using high-frequency induction heating, which is capable of rapid heating and has good response, is disclosed in Japanese Patent Publication No. 52-48342, It is proposed in Japanese Patent Application Laid-Open No. 61-207561.
（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 disadvantage that a vertical stripe pattern is generated along the longitudinal direction of the steel sheet.
特公昭52−48342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61−207561号公報は、加
熱帯を複数区画し、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、縦縞模様が解消できること
を開示している。In Japanese Patent Publication No. 52-48342, a heating coil is arranged obliquely, and in Japanese Patent Application Laid-Open No. 61-207561, a heating zone is divided into a plurality of sections, and the input frequency to the induction heating coil is set to 2 times.
It discloses that vertical stripes can be eliminated by using more than one kind.
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、完全な解決策とはなっていない。However, even with such a method, vertical stripes may occur depending on the heating conditions, and this is not a complete 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 of manufacturing a galvanized steel sheet with high frequency induction heating that can more effectively prevent the occurrence of such vertical stripes.
（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、溶融状態である亜鉛表
面に縞状の盛り上がりが生じることに起因する。この現
象は高周波の波形がサイン波である時に起こりやすく、
波形が乱れている時には起こらない。すなわち投入高周
波の波形をみだすことが縦縞解消に有効であることを見
出した。(Means for Solving the Problems) The vertical stripes are caused by the occurrence of stripe-like swelling on the zinc surface in a molten state in the latter half of the induction heating. This phenomenon easily occurs when the high-frequency waveform is a sine wave,
It does not occur when the waveform is distorted. That is, it has been found that finding the waveform of the applied high frequency is effective for eliminating vertical stripes.
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
導コイルに複数の異なる周波数を合成した高周波を投入
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 finding, the present invention relates to a method of manufacturing an alloyed galvanized steel sheet in which a steel sheet is immersed in a plating bath, plated, and then heated, wherein high-frequency induction heating is used as a heating means for the steel sheet. This is a method for producing an alloyed galvanized steel sheet, which comprises introducing a high frequency obtained by synthesizing a frequency.
第１図に、この発明を実施するための合金化処理装置
を模式図にて示す。FIG. 1 is a schematic view showing an alloying apparatus for carrying out the present invention.
鋼板１はめっき浴２に浸漬後シンクロール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。The steel sheet 1 is immersed in the plating bath 2, pulled up through the sink roll 3, adjusted in adhesion amount by the wiping nozzle 4, and then sent to the alloying apparatus.
合金化処理装置は誘導加熱コイル５、保持帯６、冷却
帯７から構成される。The alloying apparatus includes an induction heating coil 5, a holding zone 6, and a cooling zone 7.
誘導加熱のための電源８は２系統以上（第１図では３
系統）とし、それぞれ異なる周波数の高周波を発生し、
これが合成された高周波が加熱コイルに投入されるよう
にした。図中９はトップロールである。The power supply 8 for induction heating is composed of two or more systems (3 in FIG. 1).
System), and generate high frequencies of different frequencies,
The synthesized high frequency was supplied to the heating coil. 9 is a top roll in the figure.
（作 用） 複数の異なる周波数を合成した高周波電源による誘導
加熱によって溶融状態における亜鉛めっきの縞状盛り上
がりがなくなり、めっき鋼板の縦縞模様が解消される。(Operation) Induction heating by a high-frequency power supply combining a plurality of different frequencies eliminates the galvanized striped swelling in the molten state and eliminates the vertical striped pattern of 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, it is possible to produce an alloyed galvanized steel sheet which has no vertical stripes and has the same surface properties as burner heating by using induction heating for the alloying treatment.
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。亜鉛の付着量は片面
当り60g/m2とした。Example Hot-dip galvanizing and alloying of a steel sheet were performed using the alloying apparatus shown in FIG. The amount of zinc deposited was 60 g / m 2 per side.
表１に合金化条件と表面性状を示す。 Table 1 shows alloying conditions and surface properties.
表から明らかなよう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。As is clear from the table, in the examples of the present invention, generation of vertical stripes is not recognized, there is no uneven alloying, and an alloyed hot-dip galvanized steel sheet having a uniform surface appearance can be manufactured.
第１図は合金化処理装置の模式図である。 ５……誘導加熱装置、８……電源 FIG. 1 is a schematic view of an alloying apparatus. 5 ... induction heating device, 8 ... power supply
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小浜 哲也 岡山県倉敷市水島川崎通１丁目（番地な し） 川崎製鉄株式会社水島製鉄所内 (72)発明者 岩沼 克彦 岡山県倉敷市水島川崎通１丁目（番地な し） 川崎製鉄株式会社水島製鉄所内 (56)参考文献 特開 平１−147049（ＪＰ，Ａ) 特開 平１−136954（ＪＰ，Ａ) 特開 昭64−87755（ＪＰ，Ａ) ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tetsuya Obama 1-chome, Mizushima-Kawasaki-dori, Kurashiki-shi, Okayama Pref. Chome (without address) Kawasaki Steel Corporation Mizushima Works (56) References JP-A 1-147049 (JP, A) JP-A 1-136954 (JP, A) JP-A 64-87755 (JP, A) )
Claims (1)
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
コイルに複数の異なる周波数を合成した高周波を投入す
ること を特徴とする合金化亜鉛めっき鋼板の製造方法。1. A method for producing an alloyed galvanized steel sheet in which a steel sheet is immersed in a plating bath, plated, and then heated, wherein high-frequency induction heating is used as a heating means for the steel sheet, and a plurality of different frequencies are applied to the induction coil. A method for producing an alloyed galvanized steel sheet, comprising applying a synthesized high frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10388A JP2602868B2 (en) | 1988-01-05 | 1988-01-05 | Manufacturing method of alloyed galvanized steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10388A JP2602868B2 (en) | 1988-01-05 | 1988-01-05 | Manufacturing method of alloyed galvanized steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01177353A JPH01177353A (en) | 1989-07-13 |
| JP2602868B2 true JP2602868B2 (en) | 1997-04-23 |
Family
ID=11464759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10388A Expired - Lifetime JP2602868B2 (en) | 1988-01-05 | 1988-01-05 | Manufacturing method of alloyed galvanized steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2602868B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5156683A (en) * | 1990-04-26 | 1992-10-20 | Ajax Magnethermic Corporation | Apparatus for magnetic induction edge heaters with frequency modulation |
| JPH04104466A (en) * | 1990-08-22 | 1992-04-06 | Shin Kobe Electric Mach Co Ltd | Manufacture of current collector for lead-acid battery |
| JP2776150B2 (en) * | 1992-05-26 | 1998-07-16 | 日本鋼管株式会社 | Method for producing two-layer alloyed hot-dip galvanized steel sheet with excellent ED resistance |
-
1988
- 1988-01-05 JP JP10388A patent/JP2602868B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01177353A (en) | 1989-07-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |