JPH09256074A - Bright anneling method of stainless steel - Google Patents
Bright anneling method of stainless steelInfo
- Publication number
- JPH09256074A JPH09256074A JP6824996A JP6824996A JPH09256074A JP H09256074 A JPH09256074 A JP H09256074A JP 6824996 A JP6824996 A JP 6824996A JP 6824996 A JP6824996 A JP 6824996A JP H09256074 A JPH09256074 A JP H09256074A
- Authority
- JP
- Japan
- Prior art keywords
- dew point
- stainless steel
- zone
- flow rate
- bright annealing
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ステンレス鋼の光
輝焼鈍方法に関し、特に竪型光輝焼鈍炉を用いたステン
レス鋼の光輝焼鈍方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for bright annealing stainless steel, and more particularly to a method for bright annealing stainless steel using a vertical bright annealing furnace.
【０００２】[0002]
【従来の技術】冷延後のステンレス鋼を光輝焼鈍する場
合によく用いられる竪型光輝焼鈍炉を含む光輝焼鈍ライ
ンの模式図を図５に示す。入側ペイオフリール１から払
い出されたステンレス鋼帯Ｓは、入側ルーパ２を通り竪
型光輝焼鈍炉３に入る。竪型光輝焼鈍炉３は、入側か
ら、下部から上部にかけて縦に延びる入側シュート４、
最上部のトップロール室５、そこから下方に向かい加熱
帯６、均熱帯７、冷却帯８の順に構成されている。焼鈍
温度は普通、オーステナイト系ステンレス鋼では約1100
℃、フェライト系ステンレス鋼では約850 ℃が採用され
る。雰囲気ガスは、ＮＨ3 分解ガス（Ｈ2 が75％で他は
Ｎ2 ）とし、Ｈ2 の還元性によってステンレス鋼帯Ｓの
高温酸化を阻止して冷間圧延時の表面光沢を焼鈍後も維
持できるようにしている。この雰囲気ガスは通常、冷却
帯８に接続された供給用配管13により供給される。2. Description of the Related Art FIG. 5 shows a schematic diagram of a bright annealing line including a vertical bright annealing furnace which is often used for bright annealing stainless steel after cold rolling. The stainless steel strip S delivered from the entry-side payoff reel 1 passes through the entry-side looper 2 and enters the vertical bright annealing furnace 3. The vertical bright annealing furnace 3 includes an inlet side chute 4 that extends vertically from the inlet side to a lower portion to an upper portion,
An uppermost top roll chamber 5, a heating zone 6, a soaking zone 7, and a cooling zone 8 are formed in this order from the top roll chamber 5 downward. The annealing temperature is usually about 1100 for austenitic stainless steels.
℃, about 850 ℃ is used for ferritic stainless steel. The atmosphere gas is NH 3 decomposition gas (H 2 is 75% and the others are N 2 ), and the reducing property of H 2 prevents high temperature oxidation of the stainless steel strip S to keep the surface gloss during cold rolling even after annealing. I am trying to maintain it. This atmospheric gas is usually supplied through a supply pipe 13 connected to the cooling zone 8.
【０００３】ステンレス鋼帯Ｓは焼鈍後、耐食性を高め
るために硝酸電解槽10で表面に不働態皮膜を約10Å程度
形成され、出側ルーパ11を経てテンションリール12に巻
き取られる。光輝焼鈍工程におけるステンレス鋼は、焼
鈍後の耐食性改善と焼鈍中のテンパーカラー（表面着
色）発生防止が重点課題とされ、その解決には、雰囲気
ガスの露点の管理が有効であることが従来知られてい
る。After the stainless steel strip S is annealed, a passivation film is formed on the surface thereof in the nitric acid electrolytic bath 10 in order to improve the corrosion resistance, and the passivation looper 11 is passed through the tension loop 12 to wind it up. For stainless steel in the bright annealing process, improvement of corrosion resistance after annealing and prevention of temper color (surface coloring) during annealing are important issues, and it has been conventionally known that management of the dew point of atmospheric gas is effective for solving this problem. Has been.
【０００４】露点の管理は、炉内の代表位置に露点計を
設け、該露点計の検出露点と目標設定露点とを比較しな
がら行われるが、具体的には、炉外の雰囲気ガス供給元
で予め露点を調整した雰囲気ガスを供給用配管13から所
定流量で炉内に送り込む新ガス供給方式と、循環用配管
14を介して加熱帯６から雰囲気ガスを吸引して除湿器９
に導き、所定の露点に下げてから均熱帯７に返す循環方
式とがある。循環方式の例として、特開平2-236229号公
報に、加熱帯、均熱帯、冷却帯の各ゾーンの雰囲気ガス
の露点を露点計で検出し各ゾーンの設定露点と比較し
て、雰囲気ガスの全体流量と各ゾーンへの流量を制御す
ることが開示されている。The dew point is managed by providing a dew point meter at a representative position inside the furnace and comparing the detected dew point of the dew point meter with the target set dew point. Specifically, the atmosphere gas source outside the furnace is controlled. A new gas supply system that sends the atmospheric gas whose dew point is adjusted in advance from the supply pipe 13 into the furnace at a predetermined flow rate, and the circulation pipe
Dehumidifier 9 by sucking atmospheric gas from heating zone 6 via 14
There is a circulation method in which the temperature is lowered to a predetermined dew point and then returned to the soaking zone 7. As an example of the circulation method, in JP-A-2-236229, the dew point of the atmospheric gas in each zone of the heating zone, the soaking zone, and the cooling zone is detected by a dew point meter and compared with the set dew point of each zone, Controlling the total flow rate and the flow rate to each zone is disclosed.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、本発明
者らの調査したところによれば、竪型光輝焼鈍炉に対し
て、従来知られている露点管理技術を適用しても、耐食
性不良およびテンパーカラーの発生頻度を共に低減させ
ることは困難であることがわかった。そこで本発明は、
竪型光輝焼鈍炉により光輝焼鈍されるステンレス鋼の耐
食性不良およびテンパーカラーの発生頻度を効果的に低
減できるステンレス鋼の光輝焼鈍方法を提供することを
課題とする。However, according to the investigation by the present inventors, even if the conventionally known dew point control technique is applied to the vertical bright annealing furnace, the corrosion resistance is poor and the tempering is poor. It has been found that it is difficult to reduce the frequency of occurrence of color. Therefore, the present invention
It is an object of the present invention to provide a bright annealing method for stainless steel, which can effectively reduce the corrosion resistance of stainless steel brightly annealed by a vertical bright annealing furnace and the occurrence frequency of temper color.
【０００６】[0006]
【課題を解決するための手段】本発明は、入側から、入
側シュート、トップロール室、加熱帯、均熱帯、冷却帯
の順に構成される竪型光輝焼鈍炉によりステンレス鋼を
光輝焼鈍するにあたり、入側シュートまたはトップロー
ル室、および均熱帯の露点を露点計で検出し、該検出露
点が鋼種別に定められた管理範囲に入るように、雰囲気
ガスの供給流量および／または循環流量を制御すること
を特徴とするステンレス鋼の光輝焼鈍方法である。According to the present invention, stainless steel is brightly annealed by a vertical bright annealing furnace composed of an entry side chute, a top roll chamber, a heating zone, a soaking zone, and a cooling zone in this order from the entry side. At this time, the dew point of the entrance chute or top roll chamber and the soaking zone is detected by a dew point meter, and the supply flow rate and / or the circulation flow rate of the atmospheric gas are adjusted so that the detected dew point falls within the control range defined by the steel type. It is a bright annealing method of stainless steel characterized by controlling.
【０００７】このとき、オーステナイト系ステンレス
鋼、フェライト系ステンレス鋼の各鋼種に対する露点の
管理範囲を、入側シュートまたはトップロール室ではそ
れぞれ−20℃以下、−25℃以下とし、かつ均熱帯ではそ
れぞれ−50℃〜−35℃、−55℃〜−40℃とするのが望ま
しい。At this time, the control range of the dew point for each type of austenitic stainless steel and ferritic stainless steel is -20 ° C or less and -25 ° C or less in the entry side chute or the top roll chamber, and in the soaking zone. It is desirable to set the temperature to -50 ° C to -35 ° C and -55 ° C to -40 ° C.
【０００８】[0008]
【発明の実施の形態】図１は、本発明の実施形態を示す
竪型光輝焼鈍炉の模式図である。図１において、15は露
点測定孔、16は露点計、17は雰囲気ガスを露点計16へ供
給する吸引用配管、18は吸引ポンプ、19はバルブ、20は
演算器である。なお、図５と同一部材には同一符号を付
し説明を省略する。1 is a schematic diagram of a vertical bright annealing furnace showing an embodiment of the present invention. In FIG. 1, 15 is a dew point measuring hole, 16 is a dew point meter, 17 is a suction pipe for supplying atmospheric gas to the dew point meter 16, 18 is a suction pump, 19 is a valve, and 20 is a computing unit. The same members as those in FIG. 5 are denoted by the same reference numerals, and description thereof will be omitted.
【０００９】図１に示すように、本発明のステンレス鋼
の光輝焼鈍方法は、入側から、入側シュート４、トップ
ロール室５、加熱帯６、均熱帯７、冷却帯８の順に構成
される竪型光輝焼鈍炉３によりステンレス鋼帯Ｓを光輝
焼鈍するにあたり、入側シュート４またはトップロール
室５、および均熱帯７の露点を露点計16で検出し、該検
出露点が鋼種別に定まる管理範囲に入るように、雰囲気
ガス（ＮＨ3 分解ガス）の供給流量および／または循環
流量を制御することを特徴とする。図１では入側シュー
ト４と均熱帯７とに露点測定孔15を設けた場合を示して
いる。As shown in FIG. 1, the bright annealing method for stainless steel of the present invention comprises an inlet side chute 4, a top roll chamber 5, a heating zone 6, a soaking zone 7, and a cooling zone 8 in this order from the inlet side. When the stainless steel strip S is brightly annealed by the vertical bright annealing furnace 3, the dew point of the entrance side chute 4 or the top roll chamber 5 and the soaking zone 7 is detected by the dew point meter 16, and the detected dew point is determined by the steel type. It is characterized in that the supply flow rate and / or the circulation flow rate of the atmospheric gas (NH 3 decomposition gas) is controlled so as to fall within the control range. FIG. 1 shows a case where a dew point measuring hole 15 is provided in the entrance chute 4 and the soaking zone 7.
【００１０】これら露点計16の検出露点は演算器20に取
り込まれ、鋼種別に定められた管理範囲と比較され、そ
の比較結果に基づいて演算器20は供給用配管13および／
または循環用配管14のバルブ19の開度を調節して雰囲気
ガスの供給流量および／または循環流量を制御する。露
点計の設置ゾーンを上記のように規定した理由を以下に
述べる。The dew points detected by these dew point meters 16 are taken into the calculator 20 and compared with the control range defined by the steel type. Based on the comparison result, the calculator 20 causes the supply pipes 13 and / or
Alternatively, the opening of the valve 19 of the circulation pipe 14 is adjusted to control the supply flow rate and / or the circulation flow rate of the atmospheric gas. The reason why the zone for installing the dew point meter is specified as above is described below.
【００１１】本発明者らは、竪型光輝焼鈍炉の入側シュ
ートから冷却帯までの各ゾーンにおいて実験的に変えた
露点と、該露点下で光輝焼鈍されたオーステナイト系お
よびフェライト系ステンレス鋼帯のテンパーカラー発生
率との関係を多数のコイルについて調査した。図２は、
その結果を整理して得られた、各ゾーンの露点に対する
鋼種別のテンパーカラー発生率の分布を示すグラフであ
り、（ａ）は入側シュート、（ｂ）はトップロール室、
（ｃ）は加熱帯、（ｄ）は均熱帯、（ｅ）は冷却帯につ
いてそれぞれ掲げる。なお、露点は−10℃から−60℃ま
でを５℃刻みの区間に分け該区間を単位として扱ってい
る。The present inventors have experimentally changed the dew point in each zone from the inlet chute to the cooling zone of the vertical bright annealing furnace and the austenitic and ferritic stainless steel strips brightly annealed below the dew point. The relationship with the occurrence rate of temper color was investigated for many coils. FIG.
It is a graph showing the distribution of the temper color occurrence rate of each steel type with respect to the dew point of each zone obtained by organizing the results, (a) is an entry side chute, (b) is a top roll chamber,
(C) is a heating zone, (d) is a soaking zone, and (e) is a cooling zone. The dew point is divided from -10 ° C to -60 ° C into intervals of 5 ° C and the intervals are used as a unit.
【００１２】図２に示すように、テンパーカラーは、加
熱帯以降のゾーンの露点に対して発生率が目立って変化
しないが、トップロール室以前のゾーンの露点がある温
度以下になると発生しなくなるという顕著な傾向が得ら
れた。すなわちテンパーカラーを問題にする限り、加熱
帯以降のゾーンの露点は代表性を持たず、トップロール
室以前のゾーンの露点が代表性を持つのである。As shown in FIG. 2, the rate of occurrence of temper color does not remarkably change with respect to the dew point of the zone after the heating zone, but it does not occur when the dew point of the zone before the top roll chamber is below a certain temperature. The remarkable tendency was obtained. That is, as long as the temper color is a problem, the dew points of the zones after the heating zone are not representative, but the dew points of the zones before the top roll chamber are representative.
【００１３】このことからテンパーカラーの発生を抑え
るには、従来のように加熱帯以降のゾーンで露点を管理
するのでは効果に乏しく、入側シュートまたはトップロ
ール室の露点を管理指標とする必要があることがわか
る。テンパーカラー発生率を調査した上記ステンレス鋼
帯について、耐食性を調査するために、ＪＩＳＺ２３７
１に規定される塩水噴霧試験方法（ＳＳＴという）を実
施し、錆発生個数を調査した。Therefore, in order to suppress the occurrence of temper color, it is not effective to control the dew point in the zone after the heating zone as in the conventional case, and it is necessary to use the dew point of the entrance chute or the top roll chamber as a control index. You can see that there is. In order to investigate the corrosion resistance of the above-mentioned stainless steel strip whose temper color occurrence rate was investigated, JISZ237
The salt spray test method (referred to as SST) specified in 1 was carried out, and the number of rust occurrences was investigated.
【００１４】図３は、その結果を整理し得られた、各ゾ
ーンの露点に対する鋼種別の錆発生個数の分布を示すグ
ラフであり、（ａ）は入側シュート、（ｂ）はトップロ
ール室、（ｃ）は加熱帯、（ｄ）は均熱帯、（ｅ）は冷
却帯についてそれぞれ掲げる。図３に示すように、均熱
帯において錆発生のない露点範囲が他のゾーンより広い
範囲で存在し、耐食性に関しては均熱帯の露点が傑出し
た代表性を有することがわかる。したがって、耐食性改
善に対しては、均熱帯の露点を管理指標とすべきであ
る。FIG. 3 is a graph showing the distribution of the number of generated rusts of each steel type with respect to the dew point of each zone, obtained by arranging the results. (A) is the entrance chute and (b) is the top roll chamber. , (C) shows the heating zone, (d) shows the soaking zone, and (e) shows the cooling zone. As shown in FIG. 3, it can be seen that the dew point range where rust does not occur in the soaking zone is wider than the other zones, and the dew point of the soaking zone has outstanding representativeness in terms of corrosion resistance. Therefore, to improve the corrosion resistance, the dew point of the soaking zone should be used as a management index.
【００１５】これらの新知見に基づいて、露点計の設置
ゾーンを上述のように規定した。また図２は、入側シュ
ートまたはトップロール室における露点の好適管理範囲
が、オーステナイト系ステンレス鋼では−20℃以下、フ
ェライト系ステンレス鋼では−25℃以下であること、図
３は、均熱帯における露点の好適管理範囲が、オーステ
ナイト系ステンレス鋼では−50℃〜−35℃、フェライト
系ステンレス鋼では−55℃〜−40℃であることを、それ
ぞれ明示している。Based on these new findings, the installation zone of the dew point meter is defined as described above. In addition, FIG. 2 shows that the suitable control range of the dew point in the entry side chute or the top roll chamber is −20 ° C. or lower for austenitic stainless steel and −25 ° C. or lower for ferritic stainless steel. FIG. It is clearly stated that the preferable control range of the dew point is −50 ° C. to −35 ° C. for austenitic stainless steel and −55 ° C. to −40 ° C. for ferritic stainless steel.
【００１６】なお、露点が低すぎると、ステンレス鋼表
面に形成されるSi，Mnの酸化皮膜の厚みが過小となり、
また露点が高すぎると、脱Cr層ができて表層のCr濃度が
過度に低下するために、いずれの場合も耐食性が劣化す
る。また、本発明によれば、雰囲気ガス（ＮＨ3 分解ガ
ス）の露点を鋼種別かつ品質目標別にきめ細かく管理で
きるようになるので、露点管理が従来に増して効率化さ
れることとなり、雰囲気ガスの原単位も低減できる。If the dew point is too low, the thickness of the Si and Mn oxide film formed on the stainless steel surface will be too small,
On the other hand, if the dew point is too high, a Cr-free layer is formed and the Cr concentration in the surface layer is excessively lowered. Further, according to the present invention, the dew point of the atmosphere gas (NH 3 decomposition gas) can be finely controlled according to the steel type and the quality target, so that the dew point control becomes more efficient than before, and the atmosphere gas The basic unit can also be reduced.
【００１７】[0017]
【実施例】竪型光輝焼鈍炉を図１に示した形態とし、露
点管理範囲を前記のように規定して本発明を実施し、該
炉で光輝焼鈍されたステンレス鋼（コイル 100本）につ
いてテンパーカラー発生率と、ＳＳＴによる錆発生個数
とを調査して実施例とした。また、従来法で露点管理を
していた時期にとられた同種の調査データ（コイル100
本）を比較例とした。EXAMPLE A vertical type bright annealing furnace having the configuration shown in FIG. 1 was used, and the present invention was carried out by defining the dew point control range as described above. Stainless steel (100 coils) was brightly annealed in the furnace. The rate of occurrence of temper color and the number of rust generated by SST were investigated and used as an example. In addition, the same type of survey data (coil 100
Book) as a comparative example.
【００１８】図４は、テンパーカラー発生率と錆発生個
数とを実施例、比較例双方について示すグラフである。
図４より明らかなように、実施例は比較例に比べ、テン
パーカラー発生率、錆発生個数とも格段に向上し、本発
明の効果が歴然と現れた。FIG. 4 is a graph showing the rate of occurrence of temper color and the number of occurrences of rust for both Examples and Comparative Examples.
As is clear from FIG. 4, in the example, the rate of occurrence of temper color and the number of rusts were remarkably improved as compared with the comparative example, and the effect of the present invention was apparent.
【００１９】[0019]
【発明の効果】本発明によれば、竪型光輝焼鈍炉で光輝
焼鈍されるステンレス鋼のテンパーカラーの発生頻度を
大幅に低減でき、かつ耐食性が改善でき、しかもＮＨ3
分解ガスの原単位も低減できるという格段の効果を奏す
る。According to the present invention, the frequency of occurrence of temper color in stainless steel brightly annealed in a vertical bright annealing furnace can be significantly reduced, and corrosion resistance can be improved, and NH 3
This has the remarkable effect of reducing the basic unit of decomposed gas.
【図１】本発明の実施形態を示す竪型光輝焼鈍炉の模式
図である。FIG. 1 is a schematic diagram of a vertical bright annealing furnace showing an embodiment of the present invention.
【図２】各ゾーンの露点に対する鋼種別のテンパーカラ
ー発生率の分布を示すグラフである。FIG. 2 is a graph showing the distribution of the temper color occurrence rate for each steel type with respect to the dew point of each zone.
【図３】各ゾーンの露点に対する鋼種別の錆発生個数の
分布を示すグラフである。FIG. 3 is a graph showing the distribution of the number of rust occurrences for each steel type with respect to the dew point of each zone.
【図４】テンパーカラー発生率と錆発生個数とを実施
例、比較例双方について示すグラフである。FIG. 4 is a graph showing the rate of occurrence of temper color and the number of rust occurrences for both Examples and Comparative Examples.
【図５】竪型光輝焼鈍炉を含む光輝焼鈍ラインの模式図
である。FIG. 5 is a schematic view of a bright annealing line including a vertical bright annealing furnace.
１ 入側ペイオフリール ２ 入側ルーパ ３ 竪型光輝焼鈍炉 ４ 入側シュート ５ トップロール室 ６ 加熱帯 ７ 均熱帯 ８ 冷却帯 ９ 除湿器 10 硝酸電解槽 11 出側ルーパ 12 テンションリール 13 供給用配管 14 循環用配管 15 露点測定孔 16 露点計 17 吸引用配管 18 吸引ポンプ 19 バルブ 20 演算器 Ｓ ステンレス鋼帯 1 Input side pay-off reel 2 Input side looper 3 Vertical bright annealing furnace 4 Input side chute 5 Top roll chamber 6 Heating zone 7 Soaking zone 8 Cooling zone 9 Dehumidifier 10 Nitric acid electrolysis tank 11 Exit side looper 12 Tension reel 13 Supply pipe 14 Circulation pipe 15 Dew point measuring hole 16 Dew point meter 17 Suction pipe 18 Suction pump 19 Valve 20 Computer S Stainless steel strip
Claims (2)
室、加熱帯、均熱帯、冷却帯の順に構成される竪型光輝
焼鈍炉によりステンレス鋼を光輝焼鈍するにあたり、入
側シュートまたはトップロール室、および均熱帯の露点
を露点計で検出し、該検出露点が鋼種別に定められた管
理範囲に入るように、雰囲気ガスの供給流量および／ま
たは循環流量を制御することを特徴とするステンレス鋼
の光輝焼鈍方法。1. When the stainless steel is brightly annealed by a vertical bright annealing furnace composed of an incoming chute, a top roll chamber, a heating zone, a soaking zone, and a cooling zone in this order from the incoming side, the incoming side chute or the top roll is used. A stainless steel characterized by detecting the dew point of the chamber and the soaking zone with a dew point meter, and controlling the supply flow rate and / or the circulation flow rate of the atmospheric gas so that the detected dew point falls within the control range defined by the steel type. Bright annealing method for steel.
イト系ステンレス鋼の各鋼種に対する露点の管理範囲
を、入側シュートまたはトップロール室ではそれぞれ−
20℃以下、−25℃以下とし、かつ均熱帯ではそれぞれ−
50℃〜−35℃、−55℃〜−40℃とする請求項１記載のス
テンレス鋼の光輝焼鈍方法。2. The control range of the dew point for each type of austenitic stainless steel and ferritic stainless steel in the entry side chute or the top roll chamber is −
20 ℃ or below, -25 ℃ or below
The bright annealing method for stainless steel according to claim 1, wherein the temperature is 50 ° C to -35 ° C and -55 ° C to -40 ° C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6824996A JPH09256074A (en) | 1996-03-25 | 1996-03-25 | Bright anneling method of stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6824996A JPH09256074A (en) | 1996-03-25 | 1996-03-25 | Bright anneling method of stainless steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09256074A true JPH09256074A (en) | 1997-09-30 |
Family
ID=13368310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6824996A Pending JPH09256074A (en) | 1996-03-25 | 1996-03-25 | Bright anneling method of stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09256074A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002266035A (en) * | 2001-03-09 | 2002-09-18 | Chugai Ro Co Ltd | Vertical continuous heat treating apparatus |
| CN105705663A (en) * | 2013-11-07 | 2016-06-22 | 杰富意钢铁株式会社 | Continuous annealing equipment and continuous annealing method |
| JP2021091960A (en) * | 2019-12-09 | 2021-06-17 | 中外炉工業株式会社 | Heat treatment device |
| KR20210102400A (en) * | 2018-12-21 | 2021-08-19 | 아르셀러미탈 | Steel Strip Annealing Furnace with Humidity Control Device |
-
1996
- 1996-03-25 JP JP6824996A patent/JPH09256074A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002266035A (en) * | 2001-03-09 | 2002-09-18 | Chugai Ro Co Ltd | Vertical continuous heat treating apparatus |
| JP4567221B2 (en) * | 2001-03-09 | 2010-10-20 | 中外炉工業株式会社 | Vertical continuous heat treatment equipment |
| CN105705663A (en) * | 2013-11-07 | 2016-06-22 | 杰富意钢铁株式会社 | Continuous annealing equipment and continuous annealing method |
| CN105705663B (en) * | 2013-11-07 | 2017-08-04 | 杰富意钢铁株式会社 | Continuous annealing apparatus and continuous annealing method |
| US10415115B2 (en) | 2013-11-07 | 2019-09-17 | Jfe Steel Corporation | Continuous annealing system and continuous annealing method |
| KR20210102400A (en) * | 2018-12-21 | 2021-08-19 | 아르셀러미탈 | Steel Strip Annealing Furnace with Humidity Control Device |
| JP2022514388A (en) * | 2018-12-21 | 2022-02-10 | アルセロールミタル | Steelmaking furnace with humidity control device |
| US11827951B2 (en) | 2018-12-21 | 2023-11-28 | Arcelormittal | Steelmaking furnace with humidity control device |
| JP2021091960A (en) * | 2019-12-09 | 2021-06-17 | 中外炉工業株式会社 | Heat treatment device |
| WO2021117516A1 (en) * | 2019-12-09 | 2021-06-17 | 中外炉工業株式会社 | Heat treatment apparatus |
| CN114761585A (en) * | 2019-12-09 | 2022-07-15 | 中外炉工业株式会社 | Heat treatment apparatus |
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