JPH04333554A - Alloying apparatus for galvanized steel sheet - Google Patents
Alloying apparatus for galvanized steel sheetInfo
- Publication number
- JPH04333554A JPH04333554A JP10559091A JP10559091A JPH04333554A JP H04333554 A JPH04333554 A JP H04333554A JP 10559091 A JP10559091 A JP 10559091A JP 10559091 A JP10559091 A JP 10559091A JP H04333554 A JPH04333554 A JP H04333554A
- Authority
- JP
- Japan
- Prior art keywords
- steel strip
- furnace
- galvanized steel
- heating
- hot
- 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.)
- Granted
Links
- 229910001335 Galvanized steel Inorganic materials 0.000 title claims abstract description 47
- 239000008397 galvanized steel Substances 0.000 title claims abstract description 47
- 238000005275 alloying Methods 0.000 title claims abstract description 43
- 238000010438 heat treatment Methods 0.000 claims abstract description 73
- 238000001816 cooling Methods 0.000 claims abstract description 36
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 34
- 239000010959 steel Substances 0.000 claims abstract description 34
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000011701 zinc Substances 0.000 claims abstract description 26
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000005246 galvanizing Methods 0.000 claims description 28
- 238000000227 grinding Methods 0.000 abstract description 12
- 230000006698 induction Effects 0.000 abstract description 9
- 238000000137 annealing Methods 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000007747 plating Methods 0.000 description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000002791 soaking Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 3
- 229910000655 Killed steel Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Landscapes
- Coating With Molten Metal (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は鋼帯に連続的に溶融亜鉛
めっきを施こしたのちの加熱合金化処理を施こすための
合金化装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alloying apparatus for continuously hot-dip galvanizing steel strips and then subjecting them to heat alloying treatment.
【０００２】0002
【従来の技術】従来の溶融亜鉛めっき後の合金化方法を
図２によって説明する。亜鉛めっきを施こされようとす
る鋼帯１は先ず前処理炉２にて還元焼鈍され約４５０℃
に冷却されたのち、大気に曝されることなく溶融亜鉛槽
３に導入され、シンクロール４により上方に方向転換さ
れ、該亜鉛槽３より導き出される。この間に鋼帯表面に
亜鉛めっきがなされる。2. Description of the Related Art A conventional alloying method after hot-dip galvanizing will be explained with reference to FIG. The steel strip 1 to be galvanized is first reduced annealed in a pretreatment furnace 2 at approximately 450°C.
After being cooled to , it is introduced into the molten zinc tank 3 without being exposed to the atmosphere, turned upward by a sink roll 4, and led out of the zinc tank 3. During this time, the surface of the steel strip is galvanized.
【０００３】亜鉛槽３から取出されためっき鋼帯は表面
の過剰の溶融亜鉛を除去するためにエアーナイフ５によ
り除去され、適正厚さにめっき層を制御される。しかる
のち、真上に設けられた誘導加熱装置６により所定温度
近くまで先ず加熱され、次いで上方に設けられたガスバ
ーナを備えた加熱炉７にて所定温度まで加熱される。次
いで真上の保温炉８に送られて亜鉛めっき層を加熱拡散
させて母材の鉄と合金化させる。しかるのち、急冷帯９
に送られて冷却され、表面の合金化めっき層を冷却凝固
させる。合金化めっき層がロールに付着しない状態にな
る約３２０℃まで冷却されためっき鋼帯は、この段階で
トップロール１０に到達し、こゝで水平方向に方向を転
じて更に冷却室１１にて低温に冷却される。The plated steel strip taken out from the zinc tank 3 is removed by an air knife 5 to remove excess molten zinc on the surface, and the plated layer is controlled to have an appropriate thickness. Thereafter, it is first heated to near a predetermined temperature by an induction heating device 6 provided directly above, and then heated to a predetermined temperature in a heating furnace 7 equipped with a gas burner provided above. Next, the galvanized layer is sent to a heat insulating furnace 8 directly above, where the galvanized layer is heated and diffused to be alloyed with the iron base material. After that, rapid cooling zone 9
The alloyed plating layer on the surface is cooled and solidified. The plated steel strip, which has been cooled to approximately 320°C, at which the alloyed plated layer does not adhere to the roll, reaches the top roll 10 at this stage, where it changes direction horizontally and is further transferred to the cooling chamber 11. Cooled to low temperature.
【０００４】なお、一般的にはエアーナイフ５と誘導加
熱装置６の間には冷風防止板が設けられている。[0004] Generally, a cold air prevention plate is provided between the air knife 5 and the induction heating device 6.
【０００５】[0005]
【発明が解決しようとする課題】従来の合金化装置は下
のシンクロール４と上方のトップロール１０間の距離を
、めっき鋼帯の振動抑制及び建屋建設費用の点から約６
０ｍ以内に納める必要がある。従って、めっき層を加熱
・拡散して合金化するための条件としては約２０秒と短
時間加熱を余儀なくされるので高温での加熱処理を必要
とする。即ち、合金化条件としては高温でかつ短時間の
加熱を採らざるを得ない。[Problems to be Solved by the Invention] In the conventional alloying equipment, the distance between the lower sink roll 4 and the upper top roll 10 has been set to about 6 mm from the viewpoint of vibration suppression of the plated steel strip and building construction cost.
Must be within 0m. Therefore, the conditions for heating and diffusing the plating layer to form an alloy require heating for a short period of about 20 seconds, which necessitates heat treatment at a high temperature. That is, the alloying conditions must be high temperature and short heating time.
【０００６】ところが合金化時間−合金化温度−パウダ
リング量の相関を図３に示すが、図３より合金化時間が
２０秒であると約５７５℃で加熱保持する必要があるが
、合金化めっき層の加工性の指標になるパウダリング（
Ｐｏｗｄｅｒｉｎｇ）性は約５ｍｇと芳しくない。これ
は合金化の温度が高温になるほど加工性の良好なξ相に
代わって脆弱なδ１ 相及びΓ相が増大するからである
。However, the correlation between alloying time, alloying temperature, and amount of powdering is shown in FIG. 3. As shown in FIG. Powdering (
Powdering) property is about 5 mg, which is not good. This is because as the alloying temperature increases, the brittle δ1 phase and Γ phase increase in place of the ξ phase, which has good workability.
【０００７】本発明は上記技術水準に鑑み、この種従来
装置の不具合を解消し、パウダリング量が少なくなるよ
うに比較的低温で合金化処理ができる溶融亜鉛めっきの
合金化装置を提供しようとするものである。[0007] In view of the above-mentioned state of the art, the present invention aims to provide an alloying apparatus for hot-dip galvanizing that can eliminate the problems of conventional apparatuses of this type and perform alloying treatment at a relatively low temperature so as to reduce the amount of powdering. It is something to do.
【０００８】[0008]
【課題を解決するための手段】本発明は鋼帯に亜鉛めっ
きを施こす溶融亜鉛槽、亜鉛めっきされた鋼帯を加熱す
るための該溶融亜鉛槽の上方に設けられた垂直方向に延
びた加熱炉、加熱された亜鉛めっき鋼帯の進行方向を変
えるための該加熱炉の上方に設けられたフロータ、方向
転換された加熱亜鉛めっき鋼帯を更に加熱する加熱炉、
加熱亜鉛めっき鋼帯を冷却するための該加熱炉に続いて
設けられた冷却室及び水冷槽よりなることを特徴とする
溶融亜鉛めっきの合金化装置である。[Means for Solving the Problems] The present invention relates to a hot-dip galvanizing bath for galvanizing steel strips, and a vertically extending galvanizing bath provided above the hot-dip galvanizing bath for heating the galvanized steel strip. A heating furnace, a floater provided above the heating furnace for changing the traveling direction of the heated galvanized steel strip, a heating furnace for further heating the heated galvanized steel strip whose direction has been changed;
This is an alloying apparatus for hot-dip galvanizing, characterized by comprising a cooling chamber and a water-cooling tank provided following the heating furnace for cooling a heated galvanized steel strip.
【０００９】本発明は図２で説明した従来の合金化装置
のトップロール１０の代わりに、先ず非接触でめっき鋼
帯の方向転換ができるガスフロータ、電磁式のフロータ
もしくは両者の組合せのフロータを設置し、同時に従来
装置の急冷帯９を撤去して保温炉をフロータの近傍まで
延長して設置し、かつ方向転換用のフロータの直後に、
めっき鋼帯の加熱を引続いて行うために加熱装置を設置
したことを特徴とするものである。In the present invention, instead of the top roll 10 of the conventional alloying apparatus explained in FIG. 2, a gas floater, an electromagnetic floater, or a combination of both is installed, which can change the direction of the plated steel strip without contact. At the same time, the quenching zone 9 of the conventional device was removed and the insulating furnace was extended and installed near the floater, and immediately after the floater for changing direction.
A heating device is installed to continuously heat the plated steel strip.
【００１０】すなわち、本発明は
（１）鋼帯に亜鉛めっきを施こす溶融亜鉛槽、亜鉛めっ
きされた鋼帯を加熱するための該溶融亜鉛槽の上方に設
けられた垂直方向に延びた加熱炉、加熱された亜鉛めっ
き鋼帯を所定温度に保持するための該加熱炉の上方に設
けられた保温炉、保温された亜鉛めっき鋼帯の進行方向
を９０°より大きく転ずるための該保温炉の上方に設け
られたフロータ、方向転換された亜鉛めっき鋼帯を加熱
する加熱炉、更に保温する保温炉、保温亜鉛めっき鋼帯
を冷却するための該保温炉に続いて設けられた冷却室及
び水冷槽よりなることを特徴とする溶融亜鉛めっきの合
金化装置。That is, the present invention provides (1) a hot-dip galvanizing bath for galvanizing a steel strip, and a heating device extending vertically provided above the hot-dip galvanizing bath for heating the galvanized steel strip. a furnace, a heat retention furnace provided above the heating furnace for maintaining the heated galvanized steel strip at a predetermined temperature, and a heat retention furnace for turning the traveling direction of the heated galvanized steel strip by more than 90°. A floater provided above, a heating furnace for heating the galvanized steel strip whose direction has been changed, an insulating furnace for further heat retention, a cooling chamber provided subsequent to the insulating furnace for cooling the heat-retaining galvanized steel strip, and An alloying device for hot-dip galvanizing, characterized by comprising a water-cooled tank.
【００１１】（２）鋼帯に亜鉛めっきを施こす溶融亜鉛
槽、亜鉛めっきされた鋼帯を加熱するための該溶融亜鉛
槽の上方に設けられた垂直方向に延びた加熱炉、加熱さ
れた亜鉛めっき鋼帯を所定温度に保持するための該加熱
炉の上方に設けられた保温炉、保温された亜鉛めっき鋼
帯の進行方向を９０°より大きく転ずるための該保温炉
の上方に設けられたフロータ、方向を転換された亜鉛め
っき鋼帯を更に保温するための保温炉、保温亜鉛めっき
鋼帯を冷却するための該保温炉に続いて設けられた冷却
室及び水冷槽よりなることを特徴とする溶融亜鉛めっき
の合金化装置。(2) A molten zinc bath for galvanizing steel strips, a vertically extending heating furnace installed above the molten zinc bath for heating the galvanized steel strips; A heat insulating furnace is installed above the heating furnace to maintain the galvanized steel strip at a predetermined temperature, and a heat insulating furnace is provided above the heat insulating furnace to turn the traveling direction of the galvanized steel strip by more than 90 degrees. a floater, a heat insulating furnace for further warming the galvanized steel strip whose direction has been changed, a cooling chamber and a water cooling tank provided following the heat insulating furnace for cooling the heat insulating galvanized steel strip. Alloying equipment for hot dip galvanizing.
【００１２】（３）鋼帯に亜鉛めっきを施こす溶融亜鉛
槽、亜鉛めっきされた鋼帯を加熱するための該溶融亜鉛
槽の上方に設けられた垂直方向に延びた加熱炉、加熱さ
れた亜鉛めっき鋼帯の進行方向を９０°より大きく転ず
るための該加熱炉の上方に設けられたフロータ、方向を
転換された亜鉛めっき鋼帯を加熱する加熱炉、更に保温
する保温炉、保温亜鉛めっき鋼帯を冷却するための該保
温炉に続いて設けられた冷却室及び水冷槽よりなること
を特徴とする溶融亜鉛めっきの合金化装置。(3) A molten zinc bath for galvanizing the steel strip, a heating furnace extending vertically provided above the molten zinc bath for heating the galvanized steel strip, and a heating furnace for heating the galvanized steel strip. A floater installed above the heating furnace to change the traveling direction of the galvanized steel strip by more than 90 degrees, a heating furnace that heats the galvanized steel strip whose direction has been changed, a heat insulating furnace to further keep it warm, and a heat insulating galvanizing An alloying apparatus for hot-dip galvanizing, characterized by comprising a cooling chamber and a water-cooling tank provided following the insulating furnace for cooling the steel strip.
【００１３】（４）鋼帯に亜鉛めっきを施こす溶融亜鉛
槽、亜鉛めっきされた鋼帯を加熱するための該溶融亜鉛
槽の上方に設けられた垂直方向に延びた加熱炉、加熱さ
れた亜鉛めっき鋼帯を進行方向を９０°より大きく転ず
るための該加熱炉の上方に設けられたフロータ、方向を
転換された亜鉛めっき鋼帯を保温するための保温炉、保
温された亜鉛めっき鋼帯を冷却するための該保温炉に続
いて設けられた冷却室及び水冷槽よりなることを特徴と
する溶融亜鉛めっきの合金化装置。(4) A molten zinc bath for galvanizing the steel strip, a vertically extending heating furnace installed above the molten zinc bath for heating the galvanized steel strip, and a heating furnace for heating the galvanized steel strip. A floater installed above the heating furnace for changing the traveling direction of the galvanized steel strip by more than 90 degrees, a heat insulating furnace for keeping the galvanized steel strip warm after the direction has been changed, and a heated galvanized steel strip 1. An alloying apparatus for hot-dip galvanizing, comprising a cooling chamber and a water-cooling tank provided following the insulating furnace for cooling.
【００１４】本発明において使用する加熱装置は誘導加
熱とガス加熱を組み合わせた方式でもよいし、ガス加熱
単独でもよく、この方向転換部では加熱・均熱が約５秒
以上とれるように加熱・均熱設備を設けることが好まし
い。しかるのち、合金化めっき鋼帯を冷却するための冷
却室を設け、約２００℃以下に鋼帯を冷却したのち水冷
槽で１００℃以下に水冷する。[0014] The heating device used in the present invention may be a combination of induction heating and gas heating, or may be gas heating alone, and in this direction change section, heating and equalization are performed so that heating and uniform heating can be performed for about 5 seconds or more. Preferably, thermal equipment is provided. Thereafter, a cooling chamber is provided to cool the alloyed plated steel strip, and the steel strip is cooled to about 200° C. or lower, and then water-cooled to 100° C. or lower in a water cooling tank.
【００１５】[0015]
【作用】従来のトップロールの代わりに非接触でめっき
鋼帯の方向転換が可能なフロータを設置したことにより
、このフロータ通過時に合金化のためのめっき層は未だ
適正合金化状態でなく合金めっき層の鉄量が小さくても
よいから、従来はトップロールの手前で合金化めっき鋼
帯を急冷しトップロール通過時の温度を約３２０℃以下
に下げていたが、この急冷の必要は全くないので、フロ
ータ通過時にもめっき鋼帯を継続して加熱しておくこと
ができる。又フロータ通過後の方向転換部にて、引続き
加熱・均熱を続行し合金化時間を充分取ることができる
。なおフロータを高温ガスなどの高温気体を使用するこ
とによりフロータ通過中も合金化加熱を付与させること
もできる。[Function] By installing a floater that can change the direction of the plated steel strip without contact in place of the conventional top roll, the plating layer for alloying is not yet in the proper alloying state when passing through this floater, and the plated steel strip is not in the proper alloyed state. Since the amount of iron in the layer may be small, conventionally the alloyed plated steel strip was rapidly cooled before the top roll to lower the temperature to about 320℃ or less when passing through the top roll, but this rapid cooling is not necessary at all. Therefore, the plated steel strip can be continuously heated even when passing through the floater. In addition, heating and soaking can be continued at the direction change section after passing through the floater, allowing sufficient time for alloying. Note that by using a high temperature gas such as a high temperature gas in the floater, alloying heating can be applied even while passing through the floater.
【００１６】従来の合金化炉と同じライン速度で本発明
の合金化装置を操業するとすれば、上部の方向転換用の
フロータ迄の上りの区間で、従来の合金化炉に比べ７〜
１０秒間合金化加熱・均熱時間を長く取ることができ、
更に、方向転換したのち加熱・均熱室にて約２０秒近く
加熱・均熱を行うことができるので、合金化のための合
計の加熱・均熱時間が２０秒＋（７〜１０秒）＋２０秒
＝４７〜５０秒と従来の２０秒に比して２倍以上も合金
化時間を長く取ることができる。If the alloying apparatus of the present invention is operated at the same line speed as the conventional alloying furnace, the upstream section up to the floater for changing the direction at the top will be 7 to
It is possible to take a longer time for alloying heating and soaking for 10 seconds,
Furthermore, after changing the direction, heating and soaking can be performed for approximately 20 seconds in the heating and soaking chamber, so the total heating and soaking time for alloying is 20 seconds + (7 to 10 seconds). +20 seconds = 47 to 50 seconds, making the alloying time more than twice as long as the conventional 20 seconds.
【００１７】従って図３の合金化時間−温度−パウダリ
ング量の相関々係から本発明の合金化装置では約５００
℃で合金化を行えばよいことになり、パウダリング性が
従来の５ｍｇから約３ｍｇへと大巾に低減でき加工性を
著しく改善することができる。Accordingly, from the correlation between alloying time, temperature and amount of powdering shown in FIG.
It is now possible to carry out alloying at a temperature of 0.degree. C., and the powdering property can be greatly reduced from the conventional 5 mg to about 3 mg, and the workability can be significantly improved.
【００１８】[0018]
【実施例】次に本発明の一実施例を示す図１により詳細
に説明する。図１において１〜７は図２に示した従来装
置と同一構成物を示す。即ち、１は鋼帯、２は前処理炉
で還元焼鈍炉もしくは大気雰囲気炉が使用される。３は
溶融亜鉛槽、４はシンクロール、５はエアーナイフ、６
は誘導加熱装置、７はバーナ式加熱炉をそれぞれ示し、
機能は従来装置と同じである。[Embodiment] Next, an embodiment of the present invention will be explained in detail with reference to FIG. 1. In FIG. 1, numerals 1 to 7 indicate the same components as the conventional device shown in FIG. That is, 1 is a steel strip, 2 is a pretreatment furnace, and a reduction annealing furnace or an atmospheric atmosphere furnace is used. 3 is a molten zinc tank, 4 is a sink roll, 5 is an air knife, 6
7 indicates an induction heating device, 7 indicates a burner type heating furnace,
The function is the same as the conventional device.
【００１９】２０はガスフロータで、従来のトップロー
ルの位置相当の高さに設けることにより、保温炉８の炉
長を長く採ることができる。即ち、ガスフロータ２０に
よりめっき鋼帯を非接触状態で方向転換できるので、ガ
スフロータ２０を通過する際のめっき鋼帯の表面のめっ
き層は適正合金化状態でなく鉄量が小さくても何ら支障
はない。Reference numeral 20 denotes a gas floater, and by providing it at a height equivalent to the position of a conventional top roll, the length of the heat-retaining furnace 8 can be increased. That is, since the gas floater 20 can change the direction of the plated steel strip in a non-contact state, there is no problem even if the plating layer on the surface of the plated steel strip is not properly alloyed and has a small amount of iron when passing through the gas floater 20. .
【００２０】２１は誘導加熱装置、２２はバーナ式の保
温装置であり、それぞれめっき層の合金化のための加熱
保温を施こすためのものである。この追加加熱保温装置
により合金化時間を充分かせぐことができる。従って合
金化温度を低く抑えることができるので図３に示した合
金時間−温度−パウダリング量の相関々係から合金層の
パウダリング性を抑えることができる。Reference numeral 21 denotes an induction heating device, and 22 a burner type heat retention device, each of which is used to heat and retain the plating layer for alloying. This additional heating and heat retention device allows sufficient alloying time. Therefore, since the alloying temperature can be kept low, the powdering property of the alloy layer can be suppressed from the correlation between alloying time, temperature, and amount of powdering shown in FIG.
【００２１】その後、合金化めっき鋼帯は冷却されるた
めにガス冷却室２３及び水冷槽２４へと順次送られて常
温まで冷却されて合金化亜鉛めっき鋼帯となる。Thereafter, the alloyed galvanized steel strip is sequentially sent to a gas cooling chamber 23 and a water cooling tank 24 for cooling, and is cooled to room temperature to become an alloyed galvanized steel strip.
【００２２】なお、２５は電磁式のフロータでガスフロ
ータ２０と併用すればガスフロータ２０の動力を低減で
きる。また、２６はダクトで、ガスフロータ２０の作動
流体として高温のガスを使う場合に設けると熱効率をア
ップができる利点がある。この場合には、誘導加熱装置
２１を省略してもよい。[0022] Reference numeral 25 denotes an electromagnetic floater, and if used together with the gas floater 20, the power of the gas floater 20 can be reduced. Further, 26 is a duct, which has the advantage of increasing thermal efficiency when provided when high temperature gas is used as the working fluid of the gas floater 20. In this case, the induction heating device 21 may be omitted.
【００２３】また、建屋の高さの制限がある場合には、
垂直方向に延びた保温炉８を省略し、９０°以上方向を
転じた後の保持炉を長くとることも可能であり、さらに
、ガスフロータ２０の作動流体として高温ガスを使う場
合にダクト２６を設けると熱効率をアップすることがで
きるという利点がある。この場合には、誘導加熱装置２
１を省略してもよい。[0023] Furthermore, if there is a restriction on the height of the building,
It is also possible to omit the vertically extending heat retention furnace 8 and make the holding furnace longer after the direction is turned by 90 degrees or more, and furthermore, a duct 26 is provided when high temperature gas is used as the working fluid of the gas floater 20. This has the advantage of increasing thermal efficiency. In this case, the induction heating device 2
1 may be omitted.
【００２４】下記表１にめっき用原鋼帯として、低炭素
鋼、アルミキルド鋼及びチタンキルド鋼をそれぞれ使用
した場合について本発明実施例の効果を従来装置を使用
した場合と比較して示す。めっき条件は、いずれの場合
も同一としてある。Table 1 below shows the effects of the present invention when low carbon steel, aluminum killed steel and titanium killed steel are used as the raw steel strip for plating, in comparison with the case where a conventional apparatus is used. The plating conditions were the same in all cases.
【００２５】この結果から判るように、いずれの鋼種（
原鋼帯）についても本発明装置では合金化時間を４０秒
とすることができるので、合金化温度を低く抑えること
ができ、従って製品のパウダリング量が約半分と著しく
低減でき、合金化めっき鋼板の加工性を大巾に高めるこ
とができる。As can be seen from this result, any steel type (
Since the apparatus of the present invention can reduce the alloying time to 40 seconds for raw steel strips, the alloying temperature can be kept low, and the amount of powdering in the product can be significantly reduced to approximately half. The workability of steel sheets can be greatly improved.
【表１】[Table 1]
【００２６】[0026]
【発明の効果】本発明により溶融亜鉛めっきの合金化に
際して比較的低温かつ長時間の加熱処理が可能となり、
製品のパウダリングを大巾に低減でき、合金化亜鉛めっ
き鋼板の加工性を高めることが可能となる。[Effects of the Invention] The present invention enables heat treatment at a relatively low temperature and for a long time when alloying hot-dip galvanizing.
Powdering of the product can be significantly reduced, and the workability of alloyed galvanized steel sheets can be improved.
【図１】本発明装置の一実施例の説明図FIG. 1 is an explanatory diagram of an embodiment of the device of the present invention.
【図２】従来装
置の一態様の説明図[Fig. 2] An explanatory diagram of one aspect of a conventional device
【図３】亜鉛めっきの合金化時間−温度−パウダリング
量の相関々係図表[Figure 3] Correlation chart of alloying time, temperature, and amount of powdering for zinc plating
Claims (4)
、亜鉛めっきされた鋼帯を加熱するための該溶融亜鉛槽
の上方に設けられた垂直方向に延びた加熱炉、加熱され
た亜鉛めっき鋼帯を所定温度に保持するための該加熱炉
の上方に設けられた保温炉、保温された亜鉛めっき鋼帯
の進行方向を９０°より大きく転ずるための該保温炉の
上方に設けられたフロータ、方向転換された亜鉛めっき
鋼帯を加熱する加熱炉、更に保温する保温炉、保温亜鉛
めっき鋼帯を冷却するための該保温炉に続いて設けられ
た冷却室及び水冷槽よりなることを特徴とする溶融亜鉛
めっきの合金化装置。1. A hot-dip zinc bath for galvanizing steel strip, a vertically extending heating furnace provided above the hot-dip zinc bath for heating the galvanized steel strip, and a heated zinc bath. A heat insulating furnace installed above the heating furnace to maintain the galvanized steel strip at a predetermined temperature, and a heat insulating furnace installed above the heat insulating furnace to turn the traveling direction of the heated galvanized steel strip by more than 90°. It consists of a floater, a heating furnace for heating the galvanized steel strip whose direction has been changed, an insulating furnace for further keeping it warm, a cooling room and a water cooling tank provided following the insulating furnace for cooling the heat-insulating galvanized steel strip. Features: Alloying equipment for hot-dip galvanizing.
、亜鉛めっきされた鋼帯を加熱するための該溶融亜鉛槽
の上方に設けられた垂直方向に延びた加熱炉、加熱され
た亜鉛めっき鋼帯を所定温度に保持するための該加熱炉
の上方に設けられた保温炉、保温された亜鉛めっき鋼帯
の進行方向を９０°より大きく転ずるための該保温炉の
上方に設けられたフロータ、方向を転換された亜鉛めっ
き鋼帯を更に保温するための保温炉、保温亜鉛めっき鋼
帯を冷却するための該保温炉に続いて設けられた冷却室
及び水冷槽よりなることを特徴とする溶融亜鉛めっきの
合金化装置。2. A hot-dip zinc bath for galvanizing steel strip, a vertically extending heating furnace provided above the hot-dip zinc bath for heating the galvanized steel strip, and a heated zinc bath. A heat insulating furnace provided above the heating furnace to maintain the galvanized steel strip at a predetermined temperature, and a heat insulating furnace provided above the heat insulating furnace to change the traveling direction of the galvanized steel strip by more than 90°. It is characterized by comprising a floater, a heat insulating furnace for further keeping warm the galvanized steel strip whose direction has been changed, a cooling chamber and a water cooling tank provided following the heat insulating furnace for cooling the heat insulating galvanized steel strip. Alloying equipment for hot dip galvanizing.
、亜鉛めっきされた鋼帯を加熱するための該溶融亜鉛槽
の上方に設けられた垂直方向に延びた加熱炉、加熱され
た亜鉛めっき鋼帯の進行方向を９０°より大きく転ずる
ための該加熱炉の上方に設けられたフロータ、方向を転
換された亜鉛めっき鋼帯を加熱する加熱炉、更に保温す
る保温炉、保温亜鉛めっき鋼帯を冷却するための該保温
炉に続いて設けられた冷却室及び水冷槽よりなることを
特徴とする溶融亜鉛めっきの合金化装置。3. A molten zinc bath for galvanizing steel strips, a vertically extending heating furnace provided above the molten zinc bath for heating the galvanized steel strips, and a heated zinc bath. A floater installed above the heating furnace to change the traveling direction of the galvanized steel strip by more than 90 degrees, a heating furnace that heats the galvanized steel strip whose direction has been changed, a heat insulating furnace to keep it warm, and a heat insulating galvanized steel. An alloying apparatus for hot-dip galvanizing, characterized by comprising a cooling chamber and a water-cooling tank provided following the insulating furnace for cooling the strip.
、亜鉛めっきされた鋼帯を加熱するための該溶融亜鉛槽
の上方に設けられた垂直方向に延びた加熱炉、加熱され
た亜鉛めっき鋼帯を進行方向を９０°より大きく転ずる
ための該加熱炉の上方に設けられたフロータ、方向を転
換された亜鉛めっき鋼帯を保温するための保温炉、保温
された亜鉛めっき鋼帯を冷却するための該保温炉に続い
て設けられた冷却室及び水冷槽よりなることを特徴とす
る溶融亜鉛めっきの合金化装置。4. A hot-dip zinc bath for galvanizing steel strip, a vertically extending heating furnace provided above the hot-dip zinc bath for heating the galvanized steel strip, and a heated zinc bath. A floater installed above the heating furnace for turning the traveling direction of the galvanized steel strip by more than 90 degrees, an insulating furnace for keeping the galvanized steel strip warm after the direction has been changed, and a floater for keeping the galvanized steel strip warm after the direction has been changed. An alloying apparatus for hot-dip galvanizing, characterized by comprising a cooling chamber and a water-cooling tank provided following the heat-retaining furnace for cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10559091A JP2824345B2 (en) | 1991-05-10 | 1991-05-10 | Hot dip galvanized steel sheet alloying equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10559091A JP2824345B2 (en) | 1991-05-10 | 1991-05-10 | Hot dip galvanized steel sheet alloying equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04333554A true JPH04333554A (en) | 1992-11-20 |
| JP2824345B2 JP2824345B2 (en) | 1998-11-11 |
Family
ID=14411717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10559091A Expired - Fee Related JP2824345B2 (en) | 1991-05-10 | 1991-05-10 | Hot dip galvanized steel sheet alloying equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2824345B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0559511A (en) * | 1991-05-30 | 1993-03-09 | Nippon Steel Corp | Galvanizing equipment for steel strip |
| FR2768157A1 (en) * | 1997-09-09 | 1999-03-12 | Lorraine Laminage | ALLIED GALVANIZED STEEL SHEET, METHODS AND INSTALLATION FOR THE PRODUCTION OF SUCH SHEET |
| KR100383272B1 (en) * | 1998-07-28 | 2003-07-07 | 주식회사 포스코 | Vertical Coating System |
| KR100815683B1 (en) * | 2001-12-26 | 2008-03-20 | 주식회사 포스코 | METHOD FOR REDUCING Fe DISSOLUTION AND DROSS AMOUNT IN A ZINC PLATING TANK |
| FR2919876A1 (en) * | 2007-08-10 | 2009-02-13 | Siemens Vai Metals Tech Sas | COMBINED LINE OF ANNEALING AND GALVANIZING AND PROCESS FOR TRANSFORMING A CONTINUOUS ANNEALING LINE INTO SUCH A COMBINED LINE |
| CN106893971A (en) * | 2017-04-20 | 2017-06-27 | 华能国际电力股份有限公司 | A kind of online alloyage process in metallic conduit surface and device |
-
1991
- 1991-05-10 JP JP10559091A patent/JP2824345B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0559511A (en) * | 1991-05-30 | 1993-03-09 | Nippon Steel Corp | Galvanizing equipment for steel strip |
| FR2768157A1 (en) * | 1997-09-09 | 1999-03-12 | Lorraine Laminage | ALLIED GALVANIZED STEEL SHEET, METHODS AND INSTALLATION FOR THE PRODUCTION OF SUCH SHEET |
| KR100383272B1 (en) * | 1998-07-28 | 2003-07-07 | 주식회사 포스코 | Vertical Coating System |
| KR100815683B1 (en) * | 2001-12-26 | 2008-03-20 | 주식회사 포스코 | METHOD FOR REDUCING Fe DISSOLUTION AND DROSS AMOUNT IN A ZINC PLATING TANK |
| FR2919876A1 (en) * | 2007-08-10 | 2009-02-13 | Siemens Vai Metals Tech Sas | COMBINED LINE OF ANNEALING AND GALVANIZING AND PROCESS FOR TRANSFORMING A CONTINUOUS ANNEALING LINE INTO SUCH A COMBINED LINE |
| WO2009034243A1 (en) * | 2007-08-10 | 2009-03-19 | Siemens Vai Metals Technologies Sas | Combined annealing and galvanisation line and method for converting a continuous annealing line into such combined line |
| CN106893971A (en) * | 2017-04-20 | 2017-06-27 | 华能国际电力股份有限公司 | A kind of online alloyage process in metallic conduit surface and device |
| CN106893971B (en) * | 2017-04-20 | 2023-08-11 | 华能国际电力股份有限公司 | Online alloying method and device for metal pipeline surface |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2824345B2 (en) | 1998-11-11 |
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