JPS6239208B2 - - Google Patents
Info
- Publication number
- JPS6239208B2 JPS6239208B2 JP57233003A JP23300382A JPS6239208B2 JP S6239208 B2 JPS6239208 B2 JP S6239208B2 JP 57233003 A JP57233003 A JP 57233003A JP 23300382 A JP23300382 A JP 23300382A JP S6239208 B2 JPS6239208 B2 JP S6239208B2
- Authority
- JP
- Japan
- Prior art keywords
- cooling
- cooling zone
- zone
- continuous annealing
- annealing furnace
- 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
Links
Classifications
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with cooling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Description
本発明は連続焼鈍炉の構造に関し、特に、冷却
帯の内部構造を改良することにより、ぶりき原板
等の連続焼鈍に際し、硬質から軟質まで所望の硬
度水準の原板を容易かつ経済的に製造しうる連続
焼鈍炉に関する。
鋼材の焼鈍炉としてバツチ式焼鈍炉および連続
焼鈍炉が使用されており、一般に、多品種少量生
産にはバツチ式焼鈍炉が採用され、少品種多量生
産には連続焼鈍炉が採用されている。
従来、例えばぶりき原板など表面処理用原板の
連続焼鈍にあつては、バツチ式焼鈍に比べて冷却
速度が非常に大きいため、連続焼鈍後でも常温で
多くの〔Ｃ〕が鋼中に過飽和に固溶しており、こ
のため調質圧延後のみずみ時効による硬化が大き
く軟質ぶりきを製造することは困難とされてい
た。
すなわち、従来のぶりき原板の焼鈍工程におい
ては、軟質ぶりきの製造に対しては冷却速度が十
分遅く鋼中の過飽和な〔Ｃ〕がほぼ平衡的に析出
するバツチ式焼鈍を採用し、硬質ぶりきの製造に
対しては冷却速度が大きい連続焼鈍を採用してい
た。
ところで、バツチ式焼鈍では製造日数が長く、
しかも材質が不均一であるなどの問題があるのに
対し、連続焼鈍では製造時間が非常に短かくしか
も硬さは長さ方向および巾方向とも均質となり、
硬さのばらつきもバツチ式の±２（ＨR30T）に
対し±１（ＨR30T）程度におさまるという長所
がある。このため、軟質ぶりきの製造に適用可能
な連続焼鈍炉の出現が長い間待望されていた。
そこで、最近、軟質ぶりきを連続焼鈍で製造し
ようとする試みが提案されている。この提案は、
冷却過程において、鋼板を350℃〜450℃程度の温
度でしばらく保温することにより鋼中に固溶した
〔Ｃ〕を減少させて素材を軟化させて軟質ぶりき
を得ようとするものである。
第１図は前記提案に係わる連続焼鈍炉すなわち
過時効サイクルを有する既提案の軟質ぶりき製造
用の連続焼鈍炉を示す図である。
第１図において、連続焼鈍炉１にはその入側か
ら出側に向つて加熱帯２、均熱帯３および冷却帯
４が設けられ、冷却帯４は主冷却帯５および最終
冷却帯６に分れている。
加熱帯２および均熱帯３内には多数のラジアン
トチユーブ（輻射管）７が取付けられ、ラジアン
トチユーブ内で燃料を燃焼させることにより通過
するぶりき原板などの表面処理用原板８を間接的
に加熱するようになつている。
主冷却帯５には、上流側から急冷用のガスジエ
ツト装置９および徐冷用のクーリングチユーブ１
０が取付けられている。また、この主冷却帯５に
は保温用の電熱ヒーター１１も設けられている。
最終冷却帯６には常温近くまで冷却するための
ガスジエツト装置１２が取付けられている。
第１図の連続焼鈍炉１は、第１表に示すよう
に、軟質ぶりきを製造する過時効処理サイクルと
硬質ぶりきを製造する通常サイクルとに使い分け
される。
The present invention relates to the structure of a continuous annealing furnace, and in particular, by improving the internal structure of the cooling zone, it is possible to easily and economically produce blanks with desired hardness levels from hard to soft during continuous annealing of tin blanks, etc. Regarding Uru continuous annealing furnace. Batch-type annealing furnaces and continuous annealing furnaces are used as annealing furnaces for steel materials. Generally, batch-type annealing furnaces are used for high-mix, low-volume production, and continuous annealing furnaces are used for low-mix, high-volume production. Conventionally, in continuous annealing of surface treatment blanks such as tinplate blanks, the cooling rate is much faster than batch annealing, so even after continuous annealing, a large amount of [C] becomes supersaturated in the steel at room temperature. It is a solid solution, and for this reason, hardening due to water aging after temper rolling is large, making it difficult to produce soft tinplate. In other words, in the conventional annealing process for tinplate blanks, batch annealing is used in which the cooling rate is slow enough to produce soft tinplates, and the supersaturated [C] in the steel precipitates in an almost equilibrium manner. Continuous annealing, which has a high cooling rate, was used to manufacture tinplate. By the way, batch annealing takes a long time to manufacture.
Moreover, there are problems such as non-uniformity of the material, whereas with continuous annealing, the manufacturing time is very short and the hardness is uniform in both the length and width directions.
It has the advantage that the variation in hardness is limited to about ±1 (H R 30T), compared to ±2 (H R 30T) for the batch type. For this reason, the emergence of a continuous annealing furnace that can be applied to the production of soft tinplate has been long awaited. Therefore, recently, attempts have been made to manufacture soft tinplate by continuous annealing. This proposal is
In the cooling process, the steel plate is kept warm at a temperature of about 350°C to 450°C for a while to reduce [C] solidly dissolved in the steel, soften the material, and obtain soft tinplate. FIG. 1 is a diagram showing a continuous annealing furnace according to the above proposal, that is, a previously proposed continuous annealing furnace for producing soft tinplate having an overaging cycle. In FIG. 1, a continuous annealing furnace 1 is provided with a heating zone 2, a soaking zone 3, and a cooling zone 4 from the entrance side to the exit side, and the cooling zone 4 is divided into a main cooling zone 5 and a final cooling zone 6. It is. A large number of radiant tubes 7 are installed in the heating zone 2 and the soaking zone 3, and by burning fuel in the radiant tubes, the surface treatment original plate 8 such as a tin plate plate passing through is indirectly heated. I'm starting to do that. The main cooling zone 5 includes a gas jet device 9 for rapid cooling and a cooling tube 1 for slow cooling from the upstream side.
0 is attached. The main cooling zone 5 is also provided with an electric heater 11 for keeping warm. A gas jet device 12 is attached to the final cooling zone 6 for cooling to near room temperature. As shown in Table 1, the continuous annealing furnace 1 shown in FIG. 1 is used for an overaging treatment cycle for producing soft tinplate and a normal cycle for producing hard tinplate.
【表】
第１表から明らかなごとく、過時効処理サイク
ルを行なつて軟質ぶりきを製造する場合は、主冷
却帯５のガスジエツト装置９で途中まで急冷し、
その後電熱ヒーター１１をONにして所定時間保
温して過時効する。しかる後最終冷却帯６のガス
ジエツト装置１２で常温近くまで急冷する。
一方、通常サイクルを行つて軟質ぶりきを製造
する場合は、主冷却帯５のガスジエツト装置９お
よび電熱ヒーター１１をOFFにし、徐冷用のク
ーリングチユーブ１０で徐冷した後最終冷却帯の
ガスジエツト装置１２で常温近くまで冷却する。
しかし、第１図に示すような連続焼鈍炉１にあ
つては、過時効処理サイクルにより軟質ぶりきを
製造するのに電熱ヒーター１１を使用するので、
余分に多くの電力（例えば約10KWH／Ｔ）を消
費するという欠点がある。
本発明の目的は、以上説明したようなバツチ式
焼鈍炉および第１図の連続焼鈍炉の欠点を解消
し、硬質から軟質までの所望の硬度水準の鋼板を
容易かつ経済的に製造しうる新規な連続焼鈍炉を
提供することである。
本発明の特徴は、徐冷帯を形成する炉壁を断熱
性耐火材で被覆し、この徐冷帯で徐冷または保温
のいずれかを行なうことにより硬質または軟質の
鋼板を得る点にある。
すなわち、本発明によれば、加熱帯と均熱帯と
冷却帯とを有する連続焼鈍炉において、前記冷却
帯を１次冷却帯と２次冷却帯と３次冷却帯との３
帯に分け、前記２次冷却帯に冷却設備を設けると
ともに該２次冷却帯の炉壁を断熱性耐火材で被覆
し、該２次冷却帯では冷却または保温を行ないう
るよう構成したことを特徴とする連続焼鈍炉が提
供される。
以下、第２図〜第４図を参照して本発明の実施
例を説明する。
第２図は本発明による連続焼鈍炉２０の一実施
例を示す図であり、第１図の場合と実質上同じで
ある部分はそれぞれ同一符号で表示されている。
この連続焼鈍炉２０には、表面処理用原板など
の鋼板８の通過経路に沿つて、加熱帯２、均熱帯
３および冷却帯２１が直列に設けられ、この冷却
帯２１は直列に接続された１次冷却帯２２、２次
冷却帯２３および３次冷却帯２４に分けられてい
る。
加熱帯２および均熱帯３では、第１図の場合と
同様、多数のラジアントチユーブ７によつて鋼板
８の加熱および均熱が行なわれる。
１次冷却帯２２にはガスジエツト装置２５が設
置され、ガスの風量を制御することにより鋼板８
の急冷または徐冷を適宜行ないうるようになつて
いる。
２次冷却帯２３には鋼板８の徐冷を行なう場合
に使用するクーリングチユーブ２６が設置されて
いる。また、この２次冷却帯の炉壁には鋼板８を
保温して過時効を行ないうる断熱性耐火材２７が
内張りされている。この断熱炉壁としては例えば
第２表に示すような製造のものが使用される。
３次冷却帯２４には、鋼板８を常温近くまで冷
却するためのガスジエツト装置２８が設置されて
いる。このガスジエツト装置２８も冷媒ガスの風[Table] As is clear from Table 1, when producing soft tinplate by performing an overaging treatment cycle, it is quenched halfway in the gas jet device 9 of the main cooling zone 5,
Thereafter, the electric heater 11 is turned on and kept warm for a predetermined period of time for overaging. Thereafter, the gas jet device 12 in the final cooling zone 6 rapidly cools it to near room temperature. On the other hand, when producing soft tinplate using the normal cycle, the gas jet device 9 and electric heater 11 in the main cooling zone 5 are turned off, and after slow cooling is performed in the cooling tube 10 for slow cooling, the gas jet device in the final cooling zone is turned off. Cool to near room temperature at 12. However, in the case of a continuous annealing furnace 1 as shown in FIG. 1, an electric heater 11 is used to produce soft tinplate through an overaging treatment cycle.
The disadvantage is that it consumes a lot of extra power (for example, about 10KWH/T). The purpose of the present invention is to solve the drawbacks of the batch-type annealing furnace as described above and the continuous annealing furnace shown in FIG. An object of the present invention is to provide a continuous annealing furnace. A feature of the present invention is that a hard or soft steel plate is obtained by coating the furnace wall forming an annealing zone with a heat insulating refractory material and performing either annealing or heat retention in the annealing zone. That is, according to the present invention, in a continuous annealing furnace having a heating zone, a soaking zone, and a cooling zone, the cooling zone is divided into three cooling zones: a primary cooling zone, a secondary cooling zone, and a tertiary cooling zone.
The secondary cooling zone is divided into zones, and a cooling facility is provided in the secondary cooling zone, and the furnace wall of the secondary cooling zone is coated with an insulating refractory material, so that cooling or heat retention can be performed in the secondary cooling zone. A continuous annealing furnace is provided. Embodiments of the present invention will be described below with reference to FIGS. 2 to 4. FIG. 2 is a diagram showing an embodiment of a continuous annealing furnace 20 according to the present invention, and parts that are substantially the same as those in FIG. 1 are designated by the same reference numerals. This continuous annealing furnace 20 is provided with a heating zone 2, a soaking zone 3, and a cooling zone 21 in series along the passage path of a steel plate 8 such as an original plate for surface treatment, and the cooling zones 21 are connected in series. It is divided into a primary cooling zone 22, a secondary cooling zone 23, and a tertiary cooling zone 24. In the heating zone 2 and the soaking zone 3, the steel plate 8 is heated and soaked by a large number of radiant tubes 7, as in the case of FIG. A gas jet device 25 is installed in the primary cooling zone 22, and the steel plate 8 is cooled by controlling the gas flow rate.
Rapid cooling or slow cooling can be performed as appropriate. A cooling tube 26 used for slowly cooling the steel plate 8 is installed in the secondary cooling zone 23 . Further, the furnace wall of this secondary cooling zone is lined with a heat-insulating refractory material 27 that can keep the steel plate 8 warm and perform over-aging. For example, those manufactured as shown in Table 2 are used as this adiabatic furnace wall. A gas jet device 28 is installed in the tertiary cooling zone 24 to cool the steel plate 8 to near room temperature. This gas jet device 28 also generates a flow of refrigerant gas.
【表】
量を制御することにより急冷または徐冷を適宜行
ないうるようになつている。なお、このガスジエ
ツト装置２８の代りにクーリングチユーブ等の他
の冷却設備を使用することも可能である。
以上第２図に示した連続焼鈍炉２０によれば、
各冷却設備のON−OFFあるいは急冷・徐冷の程
度を制御することにより鋼板（ぶりき原板など）
８の硬度水準を軟質から硬質まで適宜調整するこ
とができる。
第３表は、軟質ぶりきを得るための過時効処理
サイクル、硬質ぶりきを得るための通常サイク
ル、およびさらに高い硬度（いわゆるフルハー
ド）のぶりきを得るための急冷サイクルの各制御
方法を例示する表である。[Table] By controlling the amount, rapid cooling or slow cooling can be performed as appropriate. Note that it is also possible to use other cooling equipment such as a cooling tube in place of this gas jet device 28. According to the continuous annealing furnace 20 shown in FIG. 2,
By controlling the ON/OFF of each cooling equipment or the degree of rapid cooling/slow cooling, steel plates (tinplate original plates, etc.) can be processed.
The hardness level of 8 can be adjusted as appropriate from soft to hard. Table 3 shows each control method for the over-aging treatment cycle to obtain soft tinplate, the normal cycle to obtain hard tinplate, and the quenching cycle to obtain tinplate with even higher hardness (so-called full hardness). This is an illustrative table.
【表】
また、連続焼鈍炉２０内での鋼板温度の変化状
況は第３図に例示するとおりである。
第３図において、横軸は鋼板８の通板時間を示
し、縦軸は鋼板８の温度を示す。鋼板８の温度は
加熱帯２を通板する間（T0〜T1）上昇し、均熱帯
３を通板する間（T1〜T2）均熱状態に維持され、
しかる後冷却帯２１に通板される。
冷却帯２１においては、T2〜T3の間１次冷却
帯２２を通板され、T3〜T4の間２次冷却帯２３
を通板され、最後にT4〜T5の間３次冷却帯（最
終冷却帯）２４を通板されて常温近くまで冷却さ
れる。
第３図中の冷却帯（T2〜T5）における温度は第
３表中の各制御態様によつて変化する。すなわ
ち、第３図中の曲線Ａは過時効処理サイクルの温
度変化を示し、曲線Ｂは通常サイクルの温度変化
を示し、曲線Ｃは急冷サイクルの温度変化を示
す。
以上の第３表および第３図から明らかなごと
く、軟質ぶりきを製造する場合には、１次冷却帯
２２のガスジエツト装置２５により途中まで急冷
し、２次冷却帯２３ではクーリングチユーブ２６
をOFFにし断熱炉壁によつて350℃〜450℃に保
温することにより過時効効果を持たせ、３次冷却
帯２４ではガスジエツト装置２８により常温近く
まで急冷し、第３図中の曲線Ａのような処理を行
なう。
軟質ぶりきを製造する通常サイクルでは、第３
図中の曲線Ｂに示すように、１次冷却帯２２およ
び２次冷却帯２３とも、そのガスジエツト装置２
５およびクーリングチユーブ２６でそれぞれ徐冷
し、最後に３次冷却帯２４のガスジエツト装置２
８で常温近くまで冷却（やゝ徐冷）する。
さらに硬度の高いフルハードのぶりきを製造す
る急冷サイクルでは、第３図中の曲線Ｃに示すよ
うに、１次冷却帯２２のガスジエツト装置２５の
風量を増大して一挙に常温近くまで急冷し、２次
冷却帯２３のクーリングチユーブ２６および３次
冷却帯２４のガスジエツト装置２８は第３表に示
すようにいずれもOFFにして通板させる。
第４図は、鋼板材質として連続鋳造によつて溶
製したAlキルド鋼を使用し加熱温度を700℃とし
て、前述の各サイクルで焼鈍処理した場合の鋼板
硬度の実測結果を示す図である。第４図の縦軸は
焼鈍後の硬度（ＨR30Tスケール）を表わす。
第４図において、〇印は急冷サイクルによるフ
ルハードの硬質ぶりきの測定値を、△印は通常サ
イクルによる硬質ぶりきの測定値を、×印は過時
効処理サイクルによる軟質ぶりきの測定値をそれ
ぞれ示す。
以上第２図〜第４図について説明した実施例に
よれば、２次冷却帯２３の炉壁を断熱性耐火材２
７で被覆し所定温度に保温できるよう構成したの
で、１次、２次および３次の各冷却帯の冷却設備
を使い分けるだけで、軟質から硬質（フルハード
を含む）までの全ての硬度水準の鋼板を容易に製
造しうる連続焼鈍炉が得られる。特に、２次冷却
帯では従来技術における電熱ヒーターを用いるこ
となく過時効を行なうことができるので、余分の
電力（例えば約10KWH／Ｔ）を必要としない経
済的な連続焼鈍炉が得られる。
また、ぶりき原板などの表面処理用原板の製造
において１つの連続焼鈍炉であらゆる硬質に焼鈍
できるので、軟質のぶりき原板など従来のバツチ
式焼鈍炉で長時間（かなりの日数）かけて焼鈍し
ていたものを短時間のうちにしかも均質に焼鈍で
きるという効果が得られる。
本発明はぶりき原板などの表面処理用原板の軟
質材を製造するのに適したものであるが、過時効
処理を必要とする材料であればその他の材料の連
続焼鈍に対しても適用可能である。
以上の説明から明らかなごとく、本発明によれ
ば軟質から硬質まで所望硬度の鋼板を容易かつ経
済的に製造しうる連続焼鈍炉が得られる。[Table] Furthermore, the state of change in the steel plate temperature within the continuous annealing furnace 20 is as illustrated in FIG. 3. In FIG. 3, the horizontal axis indicates the passing time of the steel plate 8, and the vertical axis indicates the temperature of the steel plate 8. The temperature of the steel plate 8 rises while passing through the heating zone 2 (T 0 to T 1 ), and is maintained in a uniformly heated state while passing through the soaking zone 3 (T 1 to T 2 ),
Thereafter, the sheet is passed through the cooling zone 21. In the cooling zone 21, the primary cooling zone 22 is passed between T2 and T3 , and the secondary cooling zone 23 is passed between T3 and T4 .
The sheet is then passed through a tertiary cooling zone (final cooling zone) 24 between T 4 and T 5 to be cooled to near room temperature. The temperature in the cooling zone (T 2 to T 5 ) in FIG. 3 changes depending on each control mode in Table 3. That is, curve A in FIG. 3 shows the temperature change in the overaging treatment cycle, curve B shows the temperature change in the normal cycle, and curve C shows the temperature change in the quenching cycle. As is clear from the above Table 3 and FIG.
is turned off and kept at 350°C to 450°C by the adiabatic furnace wall to provide an overaging effect, and in the tertiary cooling zone 24, the gas jet device 28 rapidly cools it to near room temperature, resulting in curve A in Figure 3. Perform processing like this. In the normal cycle for manufacturing soft tinplate, the third
As shown by curve B in the figure, both the primary cooling zone 22 and the secondary cooling zone 23 have their gas jet devices 2
5 and cooling tube 26, and finally the gas jet device 2 of the tertiary cooling zone 24.
At step 8, cool (slowly cool) to near room temperature. In the quenching cycle for manufacturing full-hard tinplate with even higher hardness, as shown by curve C in Figure 3, the air volume of the gas jet device 25 in the primary cooling zone 22 is increased to rapidly cool the tinplate to near room temperature. , the cooling tube 26 of the secondary cooling zone 23 and the gas jet device 28 of the tertiary cooling zone 24 are all turned off as shown in Table 3, and the plates are passed through. FIG. 4 is a diagram showing the actual measurement results of steel plate hardness when Al killed steel produced by continuous casting was used as the steel plate material, and the heating temperature was set to 700°C, and the steel plate was annealed in each cycle described above. The vertical axis in FIG. 4 represents the hardness after annealing (H R 30T scale). In Figure 4, the 〇 mark indicates the measured value of full-hard hard tin plate using the quenching cycle, the △ mark indicates the measured value of hard tin plate using the normal cycle, and the × mark indicates the measured value of soft tin plate using the overaging cycle. are shown respectively. According to the embodiment described above with reference to FIGS. 2 to 4, the furnace wall of the secondary cooling zone 23 is covered with the heat-insulating refractory material 2
7, so that it can be kept at a predetermined temperature, so it can be used for all hardness levels from soft to hard (including full hard) by simply using the cooling equipment for the primary, secondary, and tertiary cooling zones. A continuous annealing furnace that can easily produce steel plates is obtained. In particular, in the secondary cooling zone, overaging can be performed without using the electric heater in the prior art, so an economical continuous annealing furnace that does not require extra electric power (for example, about 10 KWH/T) can be obtained. In addition, in the production of surface treatment blanks such as tinplate blanks, all types of hardness can be annealed in one continuous annealing furnace, and soft tinplate blanks can be annealed over a long period of time (considerable days) in a conventional batch annealing furnace. This has the effect of allowing uniform annealing in a short period of time. Although the present invention is suitable for manufacturing soft materials such as tin plate and other surface treatment plates, it can also be applied to continuous annealing of other materials that require over-aging treatment. It is. As is clear from the above description, according to the present invention, a continuous annealing furnace can be obtained that can easily and economically produce steel sheets of desired hardness ranging from soft to hard.
第１図は既に提案されている連続焼鈍炉の構造
を例示する説明図、第２図は本発明による連続焼
鈍炉の一実施例を示す説明図、第３図は第２図の
焼鈍炉の各制御態様ごとの温度変化特性を例示す
るグラフ、第４図は第２図の焼鈍炉の各制御態様
による硬度測定値を例示するグラフである。
２…加熱帯、３…均熱帯、７…ラジアントチユ
ーブ、８…鋼板（ぶりき原板）、２０…連続焼鈍
炉、２１…冷却帯、２２…１次冷却帯、２３…２
次冷却帯、２４…３次冷却帯、２５…ガスジエツ
ト装置（冷却設備）、２６…クーリングチユーブ
（冷却設備）、２７…断熱耐火材、２８…ガスジエ
ツト装置（冷却設備）。
FIG. 1 is an explanatory diagram illustrating the structure of a continuous annealing furnace that has already been proposed, FIG. 2 is an explanatory diagram illustrating an embodiment of the continuous annealing furnace according to the present invention, and FIG. Graph illustrating temperature change characteristics for each control mode. FIG. 4 is a graph illustrating hardness measurement values for each control mode of the annealing furnace shown in FIG. 2. 2...Heating zone, 3...Soaking zone, 7...Radiant tube, 8...Steel plate (tin plate), 20...Continuous annealing furnace, 21...Cooling zone, 22...Primary cooling zone, 23...2
Secondary cooling zone, 24...Third cooling zone, 25...Gas jet device (cooling equipment), 26...Cooling tube (cooling equipment), 27...Insulating refractory material, 28...Gas jet device (cooling equipment).
Claims (1)
炉において、前記冷却帯を１次冷却帯と２次冷却
帯と３次冷却帯との３帯に分け、前記１次冷却帯
に広範囲な冷却能力を有する冷却設備を設け、前
記２次冷却帯に冷却設備を設けるとともに該２次
冷却帯の炉壁を断熱性耐火材で被覆し、該２次冷
却帯では冷却または保温を行なうよう構成したこ
とを特徴とする連続焼鈍炉。 ２ 前記１次冷却帯の冷却設備として常時ONの
ガスジエツト装置を使用し、該ガスジエツト装置
の冷却能力を調節することにより被焼鈍材の硬度
水準を調整することを特徴とする特許請求の範囲
第１項記載の連続焼鈍炉。[Claims] 1. In a continuous annealing furnace having a heating zone, a soaking zone, and a cooling zone, the cooling zone is divided into three zones, a primary cooling zone, a secondary cooling zone, and a tertiary cooling zone, and A cooling facility with a wide range of cooling capacity is provided in the secondary cooling zone, and the cooling facility is provided in the secondary cooling zone, and the furnace wall of the secondary cooling zone is coated with a heat-insulating refractory material. Or a continuous annealing furnace characterized by being configured to perform heat retention. 2. Claim 1, characterized in that a gas jet device that is always on is used as the cooling equipment for the primary cooling zone, and the hardness level of the material to be annealed is adjusted by adjusting the cooling capacity of the gas jet device. Continuous annealing furnace as described in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23300382A JPS59118815A (en) | 1982-12-27 | 1982-12-27 | Continuous annealing furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23300382A JPS59118815A (en) | 1982-12-27 | 1982-12-27 | Continuous annealing furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59118815A JPS59118815A (en) | 1984-07-09 |
| JPS6239208B2 true JPS6239208B2 (en) | 1987-08-21 |
Family
ID=16948286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23300382A Granted JPS59118815A (en) | 1982-12-27 | 1982-12-27 | Continuous annealing furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59118815A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7368523B2 (en) | 2004-11-12 | 2008-05-06 | Eastman Chemical Company | Polyester polymer and copolymer compositions containing titanium nitride particles |
| WO2020195668A1 (en) * | 2019-03-25 | 2020-10-01 | 日本特殊陶業株式会社 | Planar coil component and planar transformer |
| US20210185817A1 (en) * | 2018-08-20 | 2021-06-17 | Mitsubishi Electric Corporation | Circuit device and power conversion apparatus |
| US11424684B2 (en) | 2020-06-10 | 2022-08-23 | Apple Inc. | High performance two stage power converter with enhanced light load management |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4990448B2 (en) * | 2001-07-10 | 2012-08-01 | 新日本製鐵株式会社 | Continuous annealing furnace cooling zone in IF steel combined with continuous annealing and hot dipping. |
| JP5226965B2 (en) * | 2007-04-04 | 2013-07-03 | 新日鉄住金エンジニアリング株式会社 | Steel plate cooling method and steel plate continuous heat treatment equipment |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5637291B2 (en) * | 1973-11-22 | 1981-08-29 | ||
| JPS5637291A (en) * | 1979-08-29 | 1981-04-10 | Nec Corp | Single crystal growing apparatus by floating zone melting method |
| JPS5942732B2 (en) * | 1979-10-31 | 1984-10-17 | 川崎製鉄株式会社 | Steel strip continuous annealing equipment |
-
1982
- 1982-12-27 JP JP23300382A patent/JPS59118815A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7368523B2 (en) | 2004-11-12 | 2008-05-06 | Eastman Chemical Company | Polyester polymer and copolymer compositions containing titanium nitride particles |
| US20210185817A1 (en) * | 2018-08-20 | 2021-06-17 | Mitsubishi Electric Corporation | Circuit device and power conversion apparatus |
| WO2020195668A1 (en) * | 2019-03-25 | 2020-10-01 | 日本特殊陶業株式会社 | Planar coil component and planar transformer |
| US11424684B2 (en) | 2020-06-10 | 2022-08-23 | Apple Inc. | High performance two stage power converter with enhanced light load management |
| US11695344B2 (en) | 2020-06-10 | 2023-07-04 | Apple Inc. | High performance two stage power converter with enhanced light load management |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59118815A (en) | 1984-07-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6641279B2 (en) | Continuous annealing apparatus and continuous annealing method for strip | |
| US1808152A (en) | Continuous annealing apparatus | |
| CN110453053A (en) | A method for controlling the strip structure of gear steel | |
| JPS6239208B2 (en) | ||
| SU1406186A1 (en) | Method of controlling the heating of roll auto-sheet steel for especially complex drawing | |
| SU1399361A1 (en) | Method of heat treatment of roll stacks in bell-type furnace | |
| JP3309862B2 (en) | Continuous annealing equipment for grain-oriented electrical steel strip before final cold rolling | |
| JPH052728B2 (en) | ||
| US4621794A (en) | Apparatus for producing a grain-oriented electromagnetic steel strip or sheet | |
| JPS5944367B2 (en) | Water quenching continuous annealing method | |
| JPS5839210B2 (en) | Cooling method of steel strip during continuous annealing | |
| JP2789350B2 (en) | Bright annealing method and apparatus for stainless steel strip | |
| JPS5662928A (en) | Furnace temperature setting method of heating zone in a continuous annealing furnace | |
| JPS55110735A (en) | Method and equipment for producing galvanized steel plate for deep drawing use | |
| SU1765215A1 (en) | Method of roll firing into bell-type furnaces | |
| JPH0328320A (en) | Finish annealing method for grain-oriented magnetic steel sheet | |
| JPS57116727A (en) | Production of high carbon alloy steel wire rod | |
| JPS5943981B2 (en) | Roll temperature control method for continuous annealing furnace | |
| JPS6032693B2 (en) | Continuous annealing furnace | |
| SU850705A1 (en) | Method of cooling annealed rolls in cupola furnace | |
| JPH06100948A (en) | Cooling control method in batch type tight annealing | |
| SU1668426A1 (en) | Method for heating blanks | |
| JPS5677324A (en) | Cooling method and its apparatus in heat treatment of tool steel | |
| JPS5651533A (en) | Continuous annealing treatment method of cold rolled steel plate | |
| JPS5993826A (en) | Manufacturing method of soft tin-plated original plate |