JPS5920429A - Cooling method of steel strip in continuous annealing furnace - Google Patents

Cooling method of steel strip in continuous annealing furnace

Info

Publication number
JPS5920429A
JPS5920429A JP12889482A JP12889482A JPS5920429A JP S5920429 A JPS5920429 A JP S5920429A JP 12889482 A JP12889482 A JP 12889482A JP 12889482 A JP12889482 A JP 12889482A JP S5920429 A JPS5920429 A JP S5920429A
Authority
JP
Japan
Prior art keywords
cooling
rolls
steel strip
zone
temp
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
Application number
JP12889482A
Other languages
Japanese (ja)
Other versions
JPS6254374B2 (en
Inventor
Hiroyuki Kuroda
裕之 黒田
Nobuo Tanaka
信男 田中
Akira Furuyama
古山　彬
Shuzo Fukuda
福田　脩三
Keiichi Aramaki
荒牧　敬一
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP12889482A priority Critical patent/JPS5920429A/en
Publication of JPS5920429A publication Critical patent/JPS5920429A/en
Publication of JPS6254374B2 publication Critical patent/JPS6254374B2/ja
Granted legal-status Critical Current

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

Abstract

PURPOSE:To control the surface temp. of cooling rolls as desired and to prevent the defective shape of a steel strip in the stage of cooling the steel strip in a continuous annealing furnace, by using a refrigerant having a high b.p. while controlling the same at a required temp. CONSTITUTION:Plural cooling rolls 10 are provided in a cooling zone 3 in a continuous annealing furnace consisting of a heating zone 1, a holding zone 2 and a cooling zone 3 and an overaging zone 4, and a cooling medium harring a high b.p. (e.g.; polyvinyl pyrrolidone) is kept heated and circulated in said rolls. In the figure, 11 is pump for circulation, 12 a heating chamber for the cooling medium, 13 a heater and 14 a pipe for cooling. The cooling medium is maintained at a prescribed temp. by means of the heater 13 and the pipe 14 and is circulated in the rolls 10 by means of the pump 11 to maintain the surface of the rolls at the prescribed temp. More particularly, the surface of the rolls 10 can be maintained at a high temp. of >=100 deg.C which is not possible with water in the prior part; therefore, the steel strip is precooled at a cooling rate as high as 20- 150 deg.C/sec without using gas jet zones. The surface temp. of the rolls is controlled preferably at about 300-500 deg.C in the case of precooling the steel strip.

Description

【発明の詳細な説明】 この発明は連続焼鈍炉におけゐ銅帯冷却方法に関する。[Detailed description of the invention] This invention relates to a method for cooling a copper strip in a continuous annealing furnace.

連続焼鈍炉における銅帯冷却法としてはガスジェットに
よるものや、水冷によるもの等種々のものがあるが、深
絞シ用冷延鋼板などの場合には銅帯を冷却ロールに接触
させて急冷するロール冷却法が提案、実施されている。There are various methods for cooling the copper strip in a continuous annealing furnace, such as those using gas jets and those using water cooling, but in the case of cold-rolled steel sheets for deep drawing, etc., the copper strip is brought into contact with cooling rolls to be rapidly cooled. A roll cooling method has been proposed and implemented.

この冷却ロールはその内部に冷却媒体を循環させ得る水
冷ジャケットが内蔵されており、冷却媒体によりロール
体を冷却するように構成されている。この冷却媒体とし
ては従来は水が使われておυ、この水は銅帯及びロール
からの吸熱により６０°０前後となって循環している。This cooling roll has a built-in water cooling jacket capable of circulating a cooling medium therein, and is configured to cool the roll body with the cooling medium. Conventionally, water has been used as this cooling medium, and this water circulates at around 60°0 due to heat absorption from the copper strip and rolls.

そして冷却ロールの表面もほぼこの循環水温度と同温度
に維持されている。The surface of the cooling roll is also maintained at approximately the same temperature as the circulating water.

しかし、このような冷却ロールによる冷却Ｊ法の場合、
鋼帯温度は８５０°０〜７００“Ｃ程度ある良め、この
ような高温の銅帯をロールに接触させて急冷すると銅帯
の絞シカ上生ずるなど銅帯の形状が悪くなる欠点がある
。これを防止するために、従来は冷却ロール帯前にガス
ジェット冷却帯を設けて予め銅帯を６００℃程度まで冷
却した後に冷却する方法７ｂｔとられていた− しかし、このようなガスジェット冷却の冷却速度は５　
’Ｏ／ｓｅａ　〜４０　’Ｏ／ｓｅｅと遅いため焼入効
果が不十分になる欠点があシ、またガスジェット冷却帯
の設備が太巻くなることや電力原単位が高いガスジェッ
ト用大容量ファンの運転が必要である等の欠点があった
。However, in the case of the cooling J method using such a cooling roll,
The temperature of the steel strip is approximately 850 DEG to 700"C, but if such a high temperature copper strip is brought into contact with a roll and rapidly cooled, there is a drawback that the shape of the copper strip becomes poor, such as sagging of the copper strip. In order to prevent this, conventional method 7b was used in which a gas jet cooling zone was installed in front of the cooling roll zone and the copper strip was cooled to about 600℃ before cooling. The cooling rate is 5
'O/sea ~ 40' O/sea, which is slow and has the disadvantage of insufficient quenching effect, and large-capacity fans for gas jets that require thick windings of equipment in the gas jet cooling zone and have high power consumption. There were disadvantages such as the need to drive.

本発明は上記した従来の冷却方法の欠点を改善するため
になされたもので、沸点の高い冷媒を所要の温度圧して
用いることにより冷却ロール表面温度を任意にコントロ
ールし、これによシ鋼帯の形状悪化を防止すると共に速
い冷却速度を得ようとするものである。The present invention has been made to improve the drawbacks of the conventional cooling methods described above, and uses a refrigerant with a high boiling point at the required temperature and pressure to arbitrarily control the surface temperature of the cooling roll. The aim is to prevent deterioration of the shape of the steel and to obtain a fast cooling rate.

図面は本発明方法の説明図であＬ（１）は加熱帯、（２
）　＃ｉ均熱帯、（３）は冷却帯、（４）は過時効帯で
ある。The drawing is an explanatory diagram of the method of the present invention, where L (1) is a heating zone, (2
) #i is the soaking zone, (3) is the cooling zone, and (4) is the overaging zone.

冷却帯（３）Ｋは複数の冷却ロールα０が設けられてお
シ、ここには沸点の高い冷却媒体を加熱循環させである
。α力は循環用のポンプ、（ロ）は冷却媒体加熱槽、（
６）はヒータ、０４は冷却用の冷却パイプである。The cooling zone (3) K is provided with a plurality of cooling rolls α0, in which a cooling medium having a high boiling point is heated and circulated. α power is the circulation pump, (b) is the cooling medium heating tank, (
6) is a heater, and 04 is a cooling pipe for cooling.

冷却媒体としては２００“０以上の沸点を有するものが
好ましく、具体的にはポリビニールピロリド、ポリアル
キレングリコール、ポリソープ或は硝酸ナトリウムや硝
酸カリウム等の塩浴が使用可能である。The cooling medium preferably has a boiling point of 200"0 or more, and specifically polyvinyl pyrrolid, polyalkylene glycol, polysoap, or a salt bath such as sodium nitrate or potassium nitrate can be used.

この冷却媒体をヒータ（１，１と冷却パイプａ４によｐ
所定の温度に維持してポンプＱｌ）によシ冷却四−ルα
１内を循環させれば冷却ロール０００表面を所定の温度
に維持すゐことが出来る。This cooling medium is pumped through the heater (1, 1 and cooling pipe A4).
The cooling system is maintained at a predetermined temperature using a pump Ql).
1, the surface of the cooling roll 000 can be maintained at a predetermined temperature.

特に従来の冷却水では出来外かった１００°０以上の高
温に冷却ロールαＱの表面を維持することができるから
ガスジェット帯を用いることなく２０°ｏ／ｓｅａ〜１
５０°ｏ／ｓｅｅの高い冷却速度で鋼帯を予備冷却する
ことができる。In particular, it is possible to maintain the surface of the cooling roll αQ at a high temperature of 100°0 or more, which was impossible with conventional cooling water, so the surface temperature of the cooling roll αQ can be maintained at a high temperature of 20°o/sea to 100° without using a gas jet zone.
The steel strip can be precooled at cooling rates as high as 50° o/see.

なお、この図に示す例では冷却ロールα１の後段に従来
の水を冷却媒体とした複数の冷却四−ルに）を設置し、
冷却ロール０１により予備冷却を行い冷却ロール（ホ）
によシ最終冷却を行うように構成している。In the example shown in this figure, a plurality of conventional cooling wheels using water as a cooling medium are installed after the cooling roll α1.
Pre-cooling is performed by cooling roll 01 and the cooling roll (E)
It is configured to perform final cooling.

また総ての冷却ロールαＱに高沸点の冷却ロールを用い
ることも可能であるし、各冷却ロール毎或は冷却ロール
群毎に冷却媒体の温度或は冷却媒体そのものを変える等
の方法も可能である。It is also possible to use high-boiling point cooling rolls for all the cooling rolls αQ, and it is also possible to change the temperature of the cooling medium or the cooling medium itself for each cooling roll or for each cooling roll group. be.

なお予備冷却を行う場合には冷却ロール叫の表面温度は
３００〜５００　’０程度にするのが望ましい。In addition, when performing preliminary cooling, it is desirable that the surface temperature of the cooling roll is approximately 300 to 500'0.

以上説明したように本発明方法によれば、冷却ロールの
表面温度を任意の温度にコントロールすることができる
から、銅帯の冷却速度を自由に制御することが可能とな
る。As explained above, according to the method of the present invention, the surface temperature of the cooling roll can be controlled to an arbitrary temperature, so that the cooling rate of the copper strip can be freely controlled.

そのためガスジェット帯設備が不要であり、銅帯の形状
不良の発生等も防止することが可能とがる。また冷却速
度の速い予備冷却が行えるから焼入れ効果が減すること
がない等の効果がある。Therefore, there is no need for gas jet strip equipment, and it is possible to prevent defects in the shape of the copper strip. Further, since preliminary cooling can be performed at a high cooling rate, there is an effect that the hardening effect is not reduced.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明方法の説明図である。 図中、α１は冷却ロール、α力はポンプ、（ロ）は冷却
媒体加熱槽、（１はヒータ、（Ｊ４は冷却パイプ、四は
冷却ロールを各示す。 特許出願人　日本鋼管株式会社The drawings are explanatory diagrams of the method of the present invention. In the figure, α1 is a cooling roll, α power is a pump, (B) is a cooling medium heating tank, (1 is a heater, (J4 is a cooling pipe, and 4 is a cooling roll. Patent applicant: Nippon Kokan Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 銅帯を加熱・均熱した後冷却四−ルに接触させて冷却す
る連続焼鈍炉における銅帯冷却方法において、該冷却ロ
ールの冷却媒体として高佛点の冷却媒体を所要温度にし
て用いることによル鋼帯の冷却速度を制御することを特
徴とする連続焼鈍炉における銅帯冷却方法。In a method for cooling a copper strip in a continuous annealing furnace in which the copper strip is heated and soaked and then cooled by contacting with a cooling roll, a cooling medium with a high temperature is used as the cooling medium for the cooling roll at the required temperature. A method for cooling a copper strip in a continuous annealing furnace, characterized by controlling the cooling rate of the steel strip.
JP12889482A 1982-07-26 1982-07-26 Cooling method of steel strip in continuous annealing furnace Granted JPS5920429A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12889482A JPS5920429A (en) 1982-07-26 1982-07-26 Cooling method of steel strip in continuous annealing furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12889482A JPS5920429A (en) 1982-07-26 1982-07-26 Cooling method of steel strip in continuous annealing furnace

Publications (2)

Publication Number Publication Date
JPS5920429A true JPS5920429A (en) 1984-02-02
JPS6254374B2 JPS6254374B2 (en) 1987-11-14

Family

ID=14995973

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12889482A Granted JPS5920429A (en) 1982-07-26 1982-07-26 Cooling method of steel strip in continuous annealing furnace

Country Status (1)

Country Link
JP (1) JPS5920429A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0159806A2 (en) * 1984-04-17 1985-10-30 Mitsubishi Jukogyo Kabushiki Kaisha Apparatus for cooling strip of metals
JPS62290832A (en) * 1986-06-11 1987-12-17 Mitsubishi Heavy Ind Ltd Method for heating and cooling metallic strip
JP2012167352A (en) * 2011-02-16 2012-09-06 Nisshin Steel Co Ltd Cooling roll device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51104417A (en) * 1975-03-12 1976-09-16 Nippon Steel Corp RENZOKU SHODONHO
JPS5723036A (en) * 1980-07-18 1982-02-06 Mitsubishi Heavy Ind Ltd Method for cooling steel plate
JPS5732334A (en) * 1980-07-31 1982-02-22 Nippon Steel Corp Continuous heat treatment furnace for metallic strip
JPS57164933A (en) * 1981-04-01 1982-10-09 Mitsubishi Heavy Ind Ltd Cooling method for metallic strip and cooling roll used for this method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51104417A (en) * 1975-03-12 1976-09-16 Nippon Steel Corp RENZOKU SHODONHO
JPS5723036A (en) * 1980-07-18 1982-02-06 Mitsubishi Heavy Ind Ltd Method for cooling steel plate
JPS5732334A (en) * 1980-07-31 1982-02-22 Nippon Steel Corp Continuous heat treatment furnace for metallic strip
JPS57164933A (en) * 1981-04-01 1982-10-09 Mitsubishi Heavy Ind Ltd Cooling method for metallic strip and cooling roll used for this method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0159806A2 (en) * 1984-04-17 1985-10-30 Mitsubishi Jukogyo Kabushiki Kaisha Apparatus for cooling strip of metals
JPS60221533A (en) * 1984-04-17 1985-11-06 Mitsubishi Heavy Ind Ltd Device for cooling metallic strip
JPS62290832A (en) * 1986-06-11 1987-12-17 Mitsubishi Heavy Ind Ltd Method for heating and cooling metallic strip
JP2012167352A (en) * 2011-02-16 2012-09-06 Nisshin Steel Co Ltd Cooling roll device

Also Published As

Publication number Publication date
JPS6254374B2 (en) 1987-11-14

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