WO2006112109A1 - Process for cooling steel strip in the cooling zone of continuous heat treatment equipment and cooling apparatus - Google Patents
Process for cooling steel strip in the cooling zone of continuous heat treatment equipment and cooling apparatus Download PDFInfo
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- WO2006112109A1 WO2006112109A1 PCT/JP2006/301911 JP2006301911W WO2006112109A1 WO 2006112109 A1 WO2006112109 A1 WO 2006112109A1 JP 2006301911 W JP2006301911 W JP 2006301911W WO 2006112109 A1 WO2006112109 A1 WO 2006112109A1
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/56—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents
Definitions
- the present invention relates to a steel strip cooling method and a cooling apparatus for cooling a steel strip with water or air-water using cooling water with reduced dissolved oxygen in a cooling zone of a continuous heat treatment facility.
- Fig. 2 is a schematic diagram showing an example of a continuous continuous heat treatment facility for steel strips.
- Fig. 2 when manufacturing hot-dip galvanized steel strip, steel strip 1 is passed through heating zone 2, soaking zone 3 and cooling zone 4 in this order, and then the hot-dip zinc plating pot via snout 5 6 and is adjusted to a predetermined plating thickness by a plating adhesion amount adjuster 7 and, if necessary, alloyed by an alloying device 8 and then cooled to a predetermined temperature or lower by a cooling device 9. After passing through the top roll 10 and cooled by the air jet cooler set 1 1, the final cooling is performed in the final cooling zone 1 2.
- cooling is performed using a non-oxidizing gas such as nitrogen, and gas jet cooling is also performed in the cooling zone of the continuous annealing equipment.
- a non-oxidizing gas such as nitrogen
- gas jet cooling is also performed in the cooling zone of the continuous annealing equipment.
- the present invention solves the above-mentioned problems, and provides a cooling method and a cooling device for a steel strip that secures a cooling rate with good cooling efficiency and suppresses the formation of oxide films in the cooling zone of a continuous heat treatment facility.
- the cooling method of the steel strip in the cooling zone of the continuous heat treatment equipment of the present invention is that when the steel strip is continuously passed through and cooled in the cooling zone of the continuous heat treatment equipment, the hot dip galvanizing treatment is continued.
- the steel strip is water-cooled or air-water cooled using deaerated water in which the amount of dissolved oxygen in the cooling water is reduced by a deaerator. And features.
- the oxide film may be reduced by hydrogen reduction by spraying a hydrogen-containing gas onto a water-cooled or air-water cooled steel strip.
- the cooling device in the cooling zone of the continuous heat treatment facility of the present invention is a continuous heat treatment facility in which the steel strip is continuously passed through and cooled in the cooling zone of the continuous heat treatment facility, and subsequently subjected to hot dip galvanizing treatment.
- a hydrogen-containing gas spray cooling device for spraying a hydrogen-containing gas to a water-cooled or air-water cooled steel strip may be disposed downstream of the water cooling device or the air-water cooling device.
- the cooling device in the cooling zone of the continuous heat treatment facility of the present invention is a degassing device in which the amount of dissolved oxygen in the cooling water is reduced by a deaeration device in the cooling zone of the continuous heat treatment facility in which the steel strip is continuously passed and heat treated.
- a water cooling device that cools the steel strip with water or an air / water cooling device that cools the steel strip is installed, and hydrogen is contained in the steel strip that has been cooled with air and water downstream of the water cooling device or the air / water cooling device.
- a hydrogen-containing gas spray cooling device for spraying gas is provided.
- FIG. 1 is a diagram showing a cooling device for continuous heat treatment equipment according to the present invention.
- Fig. 2 is a schematic diagram showing an example of a continuous continuous heat treatment facility for steel strips
- FIG. 1 is a diagram showing a cooling device for a continuous heat treatment facility according to the present invention, and this embodiment is an example of being arranged in a cooling zone of a continuous heat treatment facility.
- the steel strip 1 that has passed the heating zone 2 and the soaking zone 3 shown in Fig. 2 and finished the prescribed heat treatment is turned by the deflector roll 16 and enters the cooling zone 4 and rises.
- a gas seal device 17 for blowing gas is arranged to thermally shut off the soaking zone 3 side and the cooling zone 4.
- a water cooling device that cools the steel strip 1 with water or an air-water cooling device 18 that cools the steel strip 1 is arranged.
- the air / water cooling device 1 8 is provided with an air / water injection nozzle and sprays water on the steel strip 1.
- the steam-water cooling device 1 8 is connected to the steam-water supply pipe 1 9 for supplying steam water.
- the steam-water supply pipe 1 9 is supplied with the gas supply pipe 21 for supplying gas with the blower 20 and the cooling water is supplied. Cooling water supply pipe 2 2 merges.
- the gas supplied to the blower 20 is an inert gas such as nitrogen.
- a deaeration device 24 for reducing dissolved oxygen in the cooling water supplied by the pump 23 is disposed.
- the deaeration device 24 for reducing the amount of dissolved oxygen in the cooling water a known deaeration device using ⁇ 2 ⁇ printing, gas-liquid separation membrane (decompression), or the like is used.
- a gas seal device 17 for blowing gas is arranged downstream of the water cooling device or the air water cooling device 18 so that the spray water does not go downstream.
- the steel strip 1 that has been subjected to the prescribed heat treatment in the continuous annealing equipment is purged of deaerated water in which the dissolved oxygen in the cooling water is reduced by the deaerator 24 in the cooling zone 4.
- the water-cooled or air-water-cooled steel strip 1 is passed through the next overaging zone 14, cooling zone 15, and final cooling zone 1 2 in this order and heat treated.
- steel strip 1 is introduced into hot-dip zinc plating pot 6 via snau ⁇ 5, and hot-dip galvanized through the same process as before.
- a hydrogen-containing gas spray cooling device 25 is disposed downstream of the water cooling device or the air-water cooling device 18. Even when an oxide film is formed by cooling with cooling water during water cooling or air-water cooling, the hydrogen-containing gas blowing device 18 blows a hydrogen-containing gas and reduces the oxide film by hydrogen reduction. Can do. Therefore, the formation of an oxide film can be further suppressed so as not to hinder the chemical conversion treatment or the staking treatment. Industrial applicability
- water cooling using a cooling water in which dissolved oxygen in the cooling water is reduced or air-cooling is used to cool the steel strip so that it does not interfere with the chemical conversion treatment or the tacking treatment. Formation can be suppressed.
- the oxide film can be further suppressed by the subsequent hydrogen reduction. it can.
- it because of its large cooling capacity, it is also suitable for manufacturing high-strength steel.
Abstract
The invention provides a process for cooling steel strip in the cooling zone of continuous heat treatment equipment which makes it possible to secure a cooling rate attaining a high cooling efficiency and inhibit the formation of surface oxide; and a cooling apparatus therefor, specifically, a process for cooling steel strip in the cooling zone of continuous heat treatment equipment for steel strip through which the strip is continuously passed, wherein steel strip (1) is subjected to water cooling or gas-water cooling in a water or gas-water cooling apparatus (18) in the cooling zone (4) by the use of deaerated water reduced in the dissolved oxygen content with a deaerator (24). Another cooling apparatus (25) with spray of hydrogen-containing gas may be provided on the downstream side of the cooling apparatus (18), whereby the cooled steel strip may be sprayed with hydrogen-containing gas.
Description
連続熱処理設備の冷却帯における鋼帯の冷却方法及び冷却装置 技術分野 Steel strip cooling method and cooling device in the cooling zone of continuous heat treatment equipment
本発明は、 連続熱処理設備の冷却帯において溶存酸素を低減させ た冷却水を用いて鋼帯を水冷却または気水冷却する鋼帯の冷却方法 及び冷却装置に関する。 明 The present invention relates to a steel strip cooling method and a cooling apparatus for cooling a steel strip with water or air-water using cooling water with reduced dissolved oxygen in a cooling zone of a continuous heat treatment facility. Light
背景技術 書 Technical background
通常、 熱間および Zまたは冷間にて加工された鋼帯には焼鈍が施 される。 特開 2002— 1553 1 8号公報には、 鋼帯の切替式連続熱処理設 備が開示されている。 図 2 は鋼帯の切替式連続熱処理設備の一例を 示す概略図である。 Normally, steel strips processed hot and Z or cold are annealed. Japanese Patent Application Laid-Open No. 2002-1553 18 discloses a switchable continuous heat treatment facility for steel strips. Fig. 2 is a schematic diagram showing an example of a continuous continuous heat treatment facility for steel strips.
図 2 において、 溶融亜鉛めつき鋼帯の製造時には、 鋼帯 1 は加熱 帯 2、 均熱帯 3、 冷却帯 4の順に通板させた後、 スナウ ト 5 を経由 して溶融亜鉛のめっきポッ ト 6 に導入され、 めっき付着量調節機 7 により所定のめっき厚みに調整され、 必要により合金化装置 8 にて 合金化処理された後、 冷却装置 9 にて所定の温度以下になるように 冷却され、 トップロール 10を経て、 エアージェッ トクーラ一式冷却 装置 1 1により冷却された後、 最終冷却帯 1 2で最終冷却される。 In Fig. 2, when manufacturing hot-dip galvanized steel strip, steel strip 1 is passed through heating zone 2, soaking zone 3 and cooling zone 4 in this order, and then the hot-dip zinc plating pot via snout 5 6 and is adjusted to a predetermined plating thickness by a plating adhesion amount adjuster 7 and, if necessary, alloyed by an alloying device 8 and then cooled to a predetermined temperature or lower by a cooling device 9. After passing through the top roll 10 and cooled by the air jet cooler set 1 1, the final cooling is performed in the final cooling zone 1 2.
また、 溶融亜鉛めつきしない場合にはライ ン切替装置 13で焼鈍ラ イ ンに切り替えられ、 鋼帯 1 は、 加熱帯 2 、 均熱帯 3、 冷却帯 4 と 過時効処理を行う過時効帯 14, 1 5、 最終冷却帯 1 2の順に通板される 連続熱処理設備で焼鈍された鋼帯は、 表面に化成処理やめつきが 施される。 この場合、 表面に酸化膜が生成していると、 化成処理や
めっきが十分になされず、 その後の密着性や耐食性が損なわれる。 そのため、 化成処理やめつきが施される鋼帯では、 焼鈍した鋼帯を 酸化させることなく冷却する必要がある。 鋼帯を無酸化雰囲気で冷 却する場合には、 窒素等の非酸化性のガスが使用される。 このガス に酸素などの酸化性ガスが含まれていると鋼帯が酸化される In addition, when the molten zinc does not adhere, it is switched to the annealing line by the line switching device 13. , 1 5 and the final cooling zone 1 2 are passed through the steel strip annealed by the continuous heat treatment equipment, and the surface is subjected to chemical conversion treatment and squeezing. In this case, if an oxide film is formed on the surface, Plating is not sufficient, and subsequent adhesion and corrosion resistance are impaired. For this reason, in steel strips that are subjected to chemical conversion treatment or mating, it is necessary to cool the annealed steel strip without oxidizing it. When the steel strip is cooled in a non-oxidizing atmosphere, a non-oxidizing gas such as nitrogen is used. If this gas contains an oxidizing gas such as oxygen, the steel strip will be oxidized.
鋼帯を水で冷却する場合には 、 水自体が酸化性であるために鋼帯 の酸化を避けることはできない 。 したがって、 鋼帯が厚い場 □ > ま たは比較的速い冷却速度が必要な場 には、 ガスを用いた冷却では 必要な冷却速度が得られないために水を用いた冷却が必要になる の場合、 鋼帯表面に生成した酸化膜を除去するために 、 焼鈍後に 酸洗などの後処理が必要になる。 発明の開示 When the steel strip is cooled with water, the water itself is oxidizable, so the oxidation of the steel strip cannot be avoided. Therefore, if the steel strip is thick □> or if a relatively fast cooling rate is required, cooling with water is necessary because the required cooling rate cannot be obtained by cooling with gas. If you want to remove the oxide film formed on the surface of the steel strip, post-annealing such as pickling is required after annealing. Disclosure of the invention
鋼帯を無酸化で冷却する場合には、 窒素等の非酸化性のガスを用 いた冷却が行われ、 連続焼鈍設備の冷却帯でもガスジエツ 卜冷却が 行われている。 しかし、 ガスを用いた冷却では鋼帯の厚みが厚い場 合または比較的速い冷却速度が必要な場合には、 必要な冷却速度が 得られないという課題が残る。 When the steel strip is cooled without oxidation, cooling is performed using a non-oxidizing gas such as nitrogen, and gas jet cooling is also performed in the cooling zone of the continuous annealing equipment. However, when cooling with gas, if the steel strip is thick or if a relatively fast cooling rate is required, the problem remains that the required cooling rate cannot be obtained.
本発明は、 上記課題を解決したもので、 連続熱処理設備の冷却帯 において、 冷却効率の良い冷却速度を確保するとともに、 酸化膜の 生成を抑制する鋼帯の冷却方法及び冷却装置を提供するものである 本発明の連続熱処理設備の冷却帯における鋼帯の冷却方法は、 鋼 帯を連続的に通板させて連続熱処理設備の冷却帯で冷却した後に引 き続き溶融亜鉛めつき処理する際の連続熱処理設備の冷却帯におけ る鋼帯の冷却方法において、 脱気装置により冷却水中の溶存酸素量 を低減させた脱気水を使用して鋼帯を水冷却または気水冷却するこ
とを特徴とする。 The present invention solves the above-mentioned problems, and provides a cooling method and a cooling device for a steel strip that secures a cooling rate with good cooling efficiency and suppresses the formation of oxide films in the cooling zone of a continuous heat treatment facility. The cooling method of the steel strip in the cooling zone of the continuous heat treatment equipment of the present invention is that when the steel strip is continuously passed through and cooled in the cooling zone of the continuous heat treatment equipment, the hot dip galvanizing treatment is continued. In the cooling method of the steel strip in the cooling zone of the continuous heat treatment equipment, the steel strip is water-cooled or air-water cooled using deaerated water in which the amount of dissolved oxygen in the cooling water is reduced by a deaerator. And features.
前記構成において、 水冷却または気水冷却した鋼帯に水素含有ガ スを吹き付けて水素還元にて酸化膜を還元してもよい。 In the above-described configuration, the oxide film may be reduced by hydrogen reduction by spraying a hydrogen-containing gas onto a water-cooled or air-water cooled steel strip.
また、 本発明は、 鋼帯を連続的に通板させて熱処理する連続熱処 理設備の冷却帯における鋼帯の冷却方法において、 脱気装置によ り 冷却水中の溶存酸素量を低減させた脱気水を使用して鋼帯を水冷却 または気水冷却し、 水冷却または気水冷却した鋼帯に水素含有ガス を吹き付けて水素還元にて酸化膜を還元することを特徴とする。 また、 本発明の連続熱処理設備の冷却帯における冷却装置は、 鋼 帯を連続的に通板させて連続熱処理設備の冷却帯で冷却した後に引 さ続き溶融亜鉛めつき処理する際の連続熱処理設備の冷却帯に、 脱 気装置により冷却水中の溶存酸素量を低減させた脱気水を使用 して 帯を水冷却する水冷却装置または気水冷却する気水冷却装置を配 き ¾したことを特徴とする。 Further, according to the present invention, in the cooling method of the steel strip in the cooling zone of the continuous heat treatment facility in which the steel strip is continuously passed and heat-treated, the amount of dissolved oxygen in the cooling water is reduced by the deaeration device. The steel strip is water-cooled or air-water cooled using deaerated water, and the oxide film is reduced by hydrogen reduction by blowing a hydrogen-containing gas onto the water-cooled or air-water cooled steel strip. Further, the cooling device in the cooling zone of the continuous heat treatment facility of the present invention is a continuous heat treatment facility in which the steel strip is continuously passed through and cooled in the cooling zone of the continuous heat treatment facility, and subsequently subjected to hot dip galvanizing treatment. A water cooling device that cools the belt with water or an air / water cooling device that cools the water using deaerated water in which the amount of dissolved oxygen in the cooling water is reduced by a deaeration device. Features.
前記構成において、 水冷却装置または気水冷却装置の下流に水冷 却または気水冷却した鋼帯に水素含有ガスを吹き付ける水素含有ガ ス吹き付け冷却装置を配設してもよい。 In the above-described configuration, a hydrogen-containing gas spray cooling device for spraying a hydrogen-containing gas to a water-cooled or air-water cooled steel strip may be disposed downstream of the water cooling device or the air-water cooling device.
また、 本発明の連続熱処理設備の冷却帯における冷却装置は、 鋼 帯を連続的に通板させて熱処理する連続熱処理設備の冷却帯に脱気 装置により冷却水中の溶存酸素量を低減させた脱気水を使用 して鋼 帯を水冷却する水冷却装置または気水冷却する気水冷却装置を配設 し、 水冷却装置または気水冷却装置の下流に気水冷却した鋼帯に水 素含有ガスを吹き付ける水素含有ガス吹き付け冷却装置を配設した ことを特徴とする。 図面の簡単な説明 Further, the cooling device in the cooling zone of the continuous heat treatment facility of the present invention is a degassing device in which the amount of dissolved oxygen in the cooling water is reduced by a deaeration device in the cooling zone of the continuous heat treatment facility in which the steel strip is continuously passed and heat treated. A water cooling device that cools the steel strip with water or an air / water cooling device that cools the steel strip is installed, and hydrogen is contained in the steel strip that has been cooled with air and water downstream of the water cooling device or the air / water cooling device. A hydrogen-containing gas spray cooling device for spraying gas is provided. Brief Description of Drawings
図 1 は、 本発明の連続熱処理設備の冷却装置を示す図である。
図 2 は、 鋼帯の切替式連続熱処理設備の一例を示す概略図である FIG. 1 is a diagram showing a cooling device for continuous heat treatment equipment according to the present invention. Fig. 2 is a schematic diagram showing an example of a continuous continuous heat treatment facility for steel strips
発明を実施するための最良の形態 BEST MODE FOR CARRYING OUT THE INVENTION
図 1 は本発明の連続熱処理設備の冷却装置を示す図で、 本実施例 は連続熱処理設備の冷却帯に配設された例である。 FIG. 1 is a diagram showing a cooling device for a continuous heat treatment facility according to the present invention, and this embodiment is an example of being arranged in a cooling zone of a continuous heat treatment facility.
実施例 1 Example 1
図 1 において、 図 2 に示す加熱帯 2、 均熱帯 3 を通過して所定の 熱処理を終了した鋼帯 1 はデフレクタロール 1 6で方向転換されて冷 却帯 4に入り上昇する。 冷却帯 4の入り側には、 均熱帯 3側と冷却 帯 4 を熱的に遮断するため、 気体を吹き付けるガスシール装置 1 7が 配置される。 In Fig. 1, the steel strip 1 that has passed the heating zone 2 and the soaking zone 3 shown in Fig. 2 and finished the prescribed heat treatment is turned by the deflector roll 16 and enters the cooling zone 4 and rises. On the entrance side of the cooling zone 4, a gas seal device 17 for blowing gas is arranged to thermally shut off the soaking zone 3 side and the cooling zone 4.
冷却帯 4 には、 鋼帯 1 を水冷却する水冷却装置または気水冷却す る気水冷却装置 1 8が配置される。 気水冷却装置 1 8は気水噴射ノズル が配設され、 鋼帯 1 に気水を噴霧する。 気水冷却装置 1 8には、 気水 を供給する気水供給配管 1 9が接続され、 気水供給配管 1 9はブロワ 20 で気体を供給する気体供給配管 2 1と、 冷却水を供給する冷却水供給 配管 2 2が合流している。 ブロア 20に供給する気体は、 窒素等の不活 性ガスを用いる。 In the cooling zone 4, a water cooling device that cools the steel strip 1 with water or an air-water cooling device 18 that cools the steel strip 1 is arranged. The air / water cooling device 1 8 is provided with an air / water injection nozzle and sprays water on the steel strip 1. The steam-water cooling device 1 8 is connected to the steam-water supply pipe 1 9 for supplying steam water. The steam-water supply pipe 1 9 is supplied with the gas supply pipe 21 for supplying gas with the blower 20 and the cooling water is supplied. Cooling water supply pipe 2 2 merges. The gas supplied to the blower 20 is an inert gas such as nitrogen.
冷却水供給配管 2 2にはポンプ 2 3で供給される冷却水中の溶存酸素 を低減させるための脱気装置 24が配置される。 冷却水中の溶存酸素 量を低減させる脱気装置 24には、 Ν 2 Λプリ ング、 気液分離膜 （減 圧） 等を利用 した公知の脱気装置を利用する。 In the cooling water supply pipe 22, a deaeration device 24 for reducing dissolved oxygen in the cooling water supplied by the pump 23 is disposed. As the deaeration device 24 for reducing the amount of dissolved oxygen in the cooling water, a known deaeration device using Ν 2 Λ printing, gas-liquid separation membrane (decompression), or the like is used.
水冷却装置または気水冷却装置 1 8の下流には、 噴霧水が下流に向 かわないように気体を吹き付けるガスシール装置 1 7が配置される。 連続焼鈍設備で所定の熱処理を終了した鋼帯 1 は、 冷却帯 4にお いて脱気装置 24により冷却水中の溶存酸素を低減させた脱気水を気
水供給配管 19に供給して水冷却または気水冷却する。 水冷却または 気水冷却された鋼帯 1 は次の過時効帯 14、 冷却帯 15、 最終冷却帯 1 2 の順に通板されて熱処理される。 A gas seal device 17 for blowing gas is arranged downstream of the water cooling device or the air water cooling device 18 so that the spray water does not go downstream. The steel strip 1 that has been subjected to the prescribed heat treatment in the continuous annealing equipment is purged of deaerated water in which the dissolved oxygen in the cooling water is reduced by the deaerator 24 in the cooling zone 4. Supply to water supply pipe 19 for water cooling or air / water cooling. The water-cooled or air-water-cooled steel strip 1 is passed through the next overaging zone 14, cooling zone 15, and final cooling zone 1 2 in this order and heat treated.
溶融亜鉛めつき鋼帯の製造時には、 鋼帯 1 はスナウ 卜 5 を経由し て溶融亜鉛のめっきポッ ト 6 に導入され、 従来と同様の工程を経て 溶融亜鉛めつきされる。 During the manufacture of hot-dip galvanized steel strip, steel strip 1 is introduced into hot-dip zinc plating pot 6 via snau ウ 5, and hot-dip galvanized through the same process as before.
冷却帯 4 において、 冷却水中の溶存酸素を低減させた脱気水によ り水冷却または気水冷却することによって、 化成処理やめつき処理 の妨げとならないように酸化膜の形成を抑制することができる。 実施例 2 In the cooling zone 4, it is possible to suppress the formation of an oxide film so as not to hinder the chemical conversion treatment and the stagnation treatment by cooling with water or air with deaerated water with reduced dissolved oxygen in the cooling water. it can. Example 2
本実施例は水冷却装置または気水冷却装置 18の下流に、 図 1 の点 線で示すように、 水素含有ガス吹き付け冷却装置 25を配設した例で ある。 水冷却または気水冷却の際、 冷却水による冷却で酸化膜が生 成されても、 水素含有ガス吹き付け装置 18で水素含有ガスを吹き付 けて水素還元にて酸化膜を還元して抑えることができる。 したがつ て、 化成処理やめつき処理の妨げとならないように酸化膜の形成を より抑制することができる。 産業上の利用可能性 In this embodiment, as shown by the dotted line in FIG. 1, a hydrogen-containing gas spray cooling device 25 is disposed downstream of the water cooling device or the air-water cooling device 18. Even when an oxide film is formed by cooling with cooling water during water cooling or air-water cooling, the hydrogen-containing gas blowing device 18 blows a hydrogen-containing gas and reduces the oxide film by hydrogen reduction. Can do. Therefore, the formation of an oxide film can be further suppressed so as not to hinder the chemical conversion treatment or the staking treatment. Industrial applicability
本発明による鋼帯の冷却では、 鋼帯の水冷に冷却水中の溶存酸素 を低減させた冷却水を用いた水冷却または気水冷却により、 化成処 理やめつき処理の妨げとならないように酸化膜の形成を抑制するこ とができる。 In the cooling of the steel strip according to the present invention, water cooling using a cooling water in which dissolved oxygen in the cooling water is reduced or air-cooling is used to cool the steel strip so that it does not interfere with the chemical conversion treatment or the tacking treatment. Formation can be suppressed.
また、 冷却水中の溶存酸素を低減させた冷却水とすることで、 冷 却水による冷却で酸化膜が僅かに生成されても、 後工程の水素還元 にて酸化膜をさ らに抑えることができる。 また、 冷却能が大きいの で、 高張力鋼の製造にも適している。
In addition, by using cooling water with reduced dissolved oxygen in the cooling water, even if a slight amount of oxide film is generated by cooling with cooling water, the oxide film can be further suppressed by the subsequent hydrogen reduction. it can. In addition, because of its large cooling capacity, it is also suitable for manufacturing high-strength steel.
Claims
1 . 鋼帯を連続的に通板させて連続熱処理設備の冷却帯で冷却し た後に引き続き溶融亜鉛めつき処理する際の連続熱処理設備の冷却 帯における鋼帯の冷却方法において、 1. In the cooling method of the steel strip in the cooling zone of the continuous heat treatment equipment when the steel strip is continuously passed through and cooled in the cooling zone of the continuous heat treatment equipment and subsequently subjected to the hot dip galvanizing treatment,
脱気装置により冷却水中の溶存酸素量を低減させた脱気水を使用 して鋼帯を水冷却または気水冷却することを特徴とする鋼帯の冷却 方法。 A method for cooling a steel strip, characterized in that the steel strip is water-cooled or air-water cooled using deaerated water in which the amount of dissolved oxygen in the cooling water is reduced by a degassing device.
2 . 水冷却または気水冷却した鋼帯に水素含有ガスを吹き付けて 水素還元にて酸化膜を還元することを特徴とする請求項 1 記載の連 続熱処理設備の冷却帯における鋼帯の冷却方法。 2. The method for cooling a steel strip in a cooling zone of a continuous heat treatment facility according to claim 1, wherein the oxide film is reduced by hydrogen reduction by blowing a hydrogen-containing gas onto the water-cooled or air-water cooled steel strip. .
3 . 鋼帯を連続的に通板させて熱処理する連続熱処理設備の冷却 帯における鋼帯の冷却方法において、 3. In the cooling method of the steel strip in the cooling zone of the continuous heat treatment equipment that heats the steel strip continuously through the plate,
脱気装置により冷却水中の溶存酸素量を低減させた脱気水を使用 して鋼帯を水冷却または気水冷却し、 水冷却または気水冷却した鋼 帯に水素含有ガスを吹き付けて水素還元にて酸化膜を還元すること を特徴とする連続熱処理設備の冷却帯における鋼帯の冷却方法。 The steel strip is water-cooled or air-water cooled using deaerated water in which the amount of dissolved oxygen in the cooling water is reduced by a degassing device, and hydrogen reduction is performed by blowing a hydrogen-containing gas onto the water-cooled or air-water cooled steel strip. A method for cooling a steel strip in a cooling zone of a continuous heat treatment facility, characterized by reducing an oxide film with
4 . 鋼帯を連続的に通板させて連続熱処理設備の冷却帯で冷却し た後に引き続き溶融亜鉛めつき処理する際の連続熱処理設備の冷却 帯に、 脱気装置により冷却水中の溶存酸素量を低減させた脱気水を 使用 して鋼帯を水冷却する水冷却装置または気水冷却する気水冷却 装置を配設したことを特徴とする連続熱処理設備の冷却帯における 鋼帯の冷却装置。 4. The steel strip is continuously passed through and cooled in the cooling zone of the continuous heat treatment facility, and then the molten zinc is treated in the cooling zone of the continuous heat treatment facility. A cooling device for a steel strip in a cooling zone of a continuous heat treatment facility, characterized by the provision of a water cooling device for cooling the steel strip using deaerated water with reduced water or an air / water cooling device for cooling water .
5 . 連続熱処理設備の冷却帯に、 水冷却装置または気水冷却装置 の下流に水冷却または気水冷却した鋼帯に水素含有ガスを吹き付け る水素含有ガス吹き付け冷却装置を配設したことを特徴とする請求 項 4記載の連続熱処理設備の冷却帯における鋼帯の冷却装置。
5. The cooling zone of the continuous heat treatment facility is equipped with a hydrogen-containing gas spray cooling device that blows hydrogen-containing gas onto a water-cooled or air-water cooled steel strip downstream of the water cooling device or air-water cooling device. The steel strip cooling device in the cooling zone of the continuous heat treatment facility according to claim 4.
6 . 鋼帯を連続的に通板させて熱処理する連続熱処理設備の冷却 帯に脱気装置により冷却水中の溶存酸素量を低減させた脱気水を使 用して鋼帯を水冷却する水冷却装置または気水冷却する気水冷却装 置を配設し、 水冷却装置または気水冷却装置の下流に気水冷却した 鋼帯に水素含有ガスを吹き付ける水素含有ガス吹き付け冷却装置を 配設したことを特徴とする連続熱処理設備の冷却帯における鋼帯の 冷却装置。
6. Water that cools the steel strip by using deaerated water in which the amount of dissolved oxygen in the cooling water is reduced by a degassing device in the cooling zone of the continuous heat treatment equipment that heats the steel strip continuously through the plate. A cooling device or an air / water cooling device that cools air / water is installed, and a hydrogen-containing gas spray cooling device that blows hydrogen-containing gas onto the steel strip that has been cooled with air / water is installed downstream of the water cooling device or the air / water cooling device. A steel strip cooling device in the cooling zone of a continuous heat treatment facility.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| JP2005115092 | 2005-04-12 | ||
| JP2005-115092 | 2005-04-12 |
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| WO2006112109A1 true WO2006112109A1 (en) | 2006-10-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2006/301911 WO2006112109A1 (en) | 2005-04-12 | 2006-01-30 | Process for cooling steel strip in the cooling zone of continuous heat treatment equipment and cooling apparatus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101993994A (en) * | 2010-11-29 | 2011-03-30 | 苏州中门子科技有限公司 | Water cooling device arranged on strip thermal treatment equipment |
| CN104404424A (en) * | 2014-12-02 | 2015-03-11 | 无锡市新科冶金设备有限公司 | Steel wire hot-dip galvanization wiping and sink cooling device |
| EP2103715A4 (en) * | 2007-01-09 | 2017-01-04 | Nippon Steel & Sumitomo Metal Corporation | Process for producing high-strength cold rolled steel sheet excelling in chemical treatability and relevant production equipment |
| EP3601623B1 (en) | 2017-03-22 | 2021-04-28 | Fives Stein | Method and device for cooling a steel strip travelling in a continuous line cooling section |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS637339A (en) * | 1986-06-27 | 1988-01-13 | Nippon Kokan Kk <Nkk> | Method for cooling steel strip |
| JP2000204417A (en) * | 1999-01-12 | 2000-07-25 | Nippon Steel Corp | Installation used for continuous annealing and also for hot-dipping |
| JP2001096306A (en) * | 1999-09-27 | 2001-04-10 | Nippon Steel Corp | Method for descaling of hot rolled steel sheet |
| JP2004217979A (en) * | 2003-01-14 | 2004-08-05 | Nippon Steel Corp | Forcible convection type cooling method for steel strip in continuous type heat treatment facility and its apparatus |
-
2006
- 2006-01-30 WO PCT/JP2006/301911 patent/WO2006112109A1/en not_active Application Discontinuation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS637339A (en) * | 1986-06-27 | 1988-01-13 | Nippon Kokan Kk <Nkk> | Method for cooling steel strip |
| JP2000204417A (en) * | 1999-01-12 | 2000-07-25 | Nippon Steel Corp | Installation used for continuous annealing and also for hot-dipping |
| JP2001096306A (en) * | 1999-09-27 | 2001-04-10 | Nippon Steel Corp | Method for descaling of hot rolled steel sheet |
| JP2004217979A (en) * | 2003-01-14 | 2004-08-05 | Nippon Steel Corp | Forcible convection type cooling method for steel strip in continuous type heat treatment facility and its apparatus |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2103715A4 (en) * | 2007-01-09 | 2017-01-04 | Nippon Steel & Sumitomo Metal Corporation | Process for producing high-strength cold rolled steel sheet excelling in chemical treatability and relevant production equipment |
| EP3795716A1 (en) * | 2007-01-09 | 2021-03-24 | Nippon Steel Corporation | Method of production and production facility of high strength cold rolled steel sheet excellent in chemical convertibility |
| CN101993994A (en) * | 2010-11-29 | 2011-03-30 | 苏州中门子科技有限公司 | Water cooling device arranged on strip thermal treatment equipment |
| CN101993994B (en) * | 2010-11-29 | 2012-08-08 | 苏州中门子科技有限公司 | Water cooling device arranged on strip thermal treatment equipment |
| CN104404424A (en) * | 2014-12-02 | 2015-03-11 | 无锡市新科冶金设备有限公司 | Steel wire hot-dip galvanization wiping and sink cooling device |
| CN104404424B (en) * | 2014-12-02 | 2016-09-14 | 无锡市新科冶金设备有限公司 | The most zinc-plated the smearing of steel wire heat is wiped and tank chiller |
| EP3601623B1 (en) | 2017-03-22 | 2021-04-28 | Fives Stein | Method and device for cooling a steel strip travelling in a continuous line cooling section |
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