JPS59222534A - Continuous annealing method of steel plate - Google Patents
Continuous annealing method of steel plateInfo
- Publication number
- JPS59222534A JPS59222534A JP58095017A JP9501783A JPS59222534A JP S59222534 A JPS59222534 A JP S59222534A JP 58095017 A JP58095017 A JP 58095017A JP 9501783 A JP9501783 A JP 9501783A JP S59222534 A JPS59222534 A JP S59222534A
- Authority
- JP
- Japan
- Prior art keywords
- steel plate
- plates
- steel
- furnace
- steel plates
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
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)
Abstract
Description
【発明の詳細な説明】
本発明は鋼板の連続焼鈍方法にかかるもので、コンパク
トでかつ長時間の過11!i効処理を可能側こする方法
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for continuous annealing of steel plates, which is compact and takes a long time. The present invention relates to a method of reducing i-effect processing to the possible side.
周知のように鋼板の連続焼鈍においては、冷間圧延後の
鋼板を700〜850°C程匹の温度に加熱し、しかる
後約1分間均熱して再結晶せしめ、続いて約400°C
まで急冷し鋼中の炭素を過飽和な状j18に至らしめる
。引き続き約400°Cの炉中で2〜3分間過時効処理
を行ない、製品鋼板の加工性に有害な固溶炭素を析出y
せる。As is well known, in continuous annealing of steel plates, the steel plate after cold rolling is heated to a temperature of about 700 to 850°C, then soaked for about 1 minute to recrystallize, and then heated to about 400°C.
The carbon in the steel is rapidly cooled to a supersaturated state. Subsequently, over-aging treatment is performed for 2 to 3 minutes in a furnace at approximately 400°C to precipitate solute carbon that is harmful to the workability of the product steel sheet.
let
このような従来のヒートサイクルは−Q2加■−川の鋼
板製造には十分なものであるか、深絞り用鋼板、特にD
DQクラスの高度な加」二゛性を要求される用途には不
十分なものである。その理由は、ト述の2〜3分程度の
過時効処理では固溶炭素かまた上のなレベルまで析出し
ておらす、鋼板製造後の時効劣化により降伏点の」−昇
、伸びの低−ド、鋒伏点伸びの発生等の加工性低ドを生
ずるためである。このり、1策として製鋼段階で炭素を
極力低減せしめかつ4fi!I量に残存する炭素を、チ
タン等の添加により化合物として固定することにより過
時効処理不要な高加工性鋼板を製造する方法がとられて
いるか、素材コストは上Aする。又、通常の安価な素材
(iR素含有量0.03〜0.05 X)で高加工性を
fllようとすれば長時間の過時効処理を必要とするが
、従来の大径ハースロールを有する竪型炉ではその設備
は膨大な規模となり、実現性のないものであった。Is such a conventional heat cycle sufficient for producing steel sheets for deep drawing, especially D?
This is insufficient for applications requiring a high level of DQ-class additive duality. The reason for this is that during the over-aging treatment of about 2 to 3 minutes as mentioned above, solid solute carbon precipitates to an even higher level, and aging deterioration after manufacturing the steel sheet raises the yield point and lowers the elongation. This is because it causes poor workability, such as the occurrence of deformation and elongation at the bending point. Therefore, one measure is to reduce carbon as much as possible at the steel manufacturing stage and achieve 4fi! Is there a method of manufacturing a highly formable steel plate that does not require over-aging treatment by fixing the carbon remaining in the I amount as a compound by adding titanium or the like, or the material cost increases. In addition, if you try to achieve high workability with ordinary inexpensive materials (iR element content 0.03 to 0.05 The scale of the equipment required for a vertical furnace would be enormous, making it unfeasible.
さて時効劣化は一般に時効指数で評価yれ、その価か約
3Kg/mm2以下であればDDQの製造が可能と云わ
れている。上記安価な素材で、この時効指数3 Kg/
mm’以下の達成に必要な過時効時間は20〜30分以
上とされている。すなわち従来ヒートサイクルの実に1
0倍以−ヒの過時効時間が必要なわけで、これを通常の
竪型炉で実現しようとすれば過・1
11「1効炉の炉長だけで300〜500mといった規
模となり、全く非現実的なものでしかなかった。Now, aging deterioration is generally evaluated by an aging index, and it is said that DDQ can be manufactured if the index is about 3 kg/mm2 or less. With the above inexpensive material, this aging index is 3 kg/
The overaging time required to achieve a hardness of 20 to 30 minutes or more is said to be 20 to 30 minutes or more. In other words, the conventional heat cycle
An overaging time of 0 times or more is required, and if this was attempted to be achieved with a normal vertical furnace, the length of a single-effect furnace alone would be 300 to 500 m, which would be completely unreasonable. It was just a realistic thing.
本発明はかかる従来技術の問題を解決するために発明さ
れたもので、−次冷却炉から送出された鋼板をへりカル
ターン装置により板幅方向が垂直となるよう転向せしめ
、エンドレスに循環する厚手のガイド用鋼板に沿わせて
外周から内周へと渦巻状に走行せしめ、内周において別
途設けられたへりカルターン装置により再び本来の板幅
方向が水平なパスに復帰せしめて後続する二次冷却炉へ
と送出するという極めてコンパクトな構造を有する過時
効炉によりDDQ製造に必要な長時間過時効処理を可能
にしたものである。The present invention was invented in order to solve the problems of the prior art, and consists of turning a steel plate delivered from a secondary cooling furnace so that the width direction of the steel plate is perpendicular using a helical turning device, The steel plate is run in a spiral shape from the outer circumference to the inner circumference along the guide steel plate, and a separately installed edge calturn device is used on the inner circumference to return the original plate width direction to a horizontal path, which leads to the subsequent secondary cooling furnace. This overaging furnace has an extremely compact structure and enables the long-term overaging treatment required for DDQ production.
以下具体的なl実施例に基き本発明を説明する。The present invention will be explained below based on specific examples.
連続焼鈍炉全体を示す第5図において、−次冷却を終了
し約400°Cとなった鋼板lは、=−次冷却炉50の
出口に設けられたへりカルターン装置2により板幅方向
が垂直となるよう転向せしめられる。このへりカルター
ン装置としては本発明者等による特開昭55−801(
41号公報[帯状金属板の進行方向変更装置」 (第7
図)を用いてもよいし、また第6図に示すような気体浮
上方式を用い−(もよい。第6図において1圧された気
体はノズル81よりllJ’j出し、その圧力によって
鋼板lを浮上させる。i′57図において鋼板lは円筒
面上に固定されたローラ41’)l!3により進行方向
を転換する。なお、へりカルターン装置ξ2による鋼板
の転向機構は第2図 (A)(第1図A−A線断面図)
のようになる。In FIG. 5, which shows the entire continuous annealing furnace, the steel plate 1, which has undergone the second cooling and reached approximately 400°C, is turned vertically in the width direction by the edge cal turn device 2 installed at the outlet of the second cooling furnace 50. He is converted to become. As this edge car turn device, Japanese Patent Application Laid-open No. 55-801 (
Publication No. 41 [Device for changing the traveling direction of a band-shaped metal plate] (No. 7
), or a gas levitation system as shown in FIG. 6 may be used. In FIG. i') In Figure 57, the steel plate l is fixed on the cylindrical surface of the roller 41') l! 3 changes the direction of travel. The turning mechanism of the steel plate by the helical turning device ξ2 is shown in Figure 2 (A) (cross-sectional view taken along the line A-A in Figure 1).
become that way.
転向後の鋼板1は、第3図に示す如く別途エンドレスに
W環走行するガイド用鋼板3に重ね合わせられ、一体と
なって過時効炉内を外周から内周へ渦巻状しこ走行する
。第2図(F)、第3図(第1図+r+r +I′Ii
F −F )および第4図によりこの渦巻走行の4幾
構を説明する。The steel plate 1 after turning is superimposed on a guide steel plate 3 which separately runs in an endless W ring as shown in FIG. 3, and integrally runs in a spiral shape from the outer periphery to the inner periphery in the overaging furnace. Figure 2 (F), Figure 3 (Figure 1 +r+r +I'Ii
The four configurations of this spiral travel will be explained with reference to F-F) and FIG.
ガイド用鋼板3は渦巻中心に対し放射状に配列されたカ
イI・ローラ群4により走行せしめられる。ガイドロー
ラ4は一定ピッチの溝4aを有しモータ8により駆動さ
れる。鋼板lはガイド用鋼板3の外面1こ沿ってガイド
用鋼板とともに走行する。3aは鋼板のエンジを支える
爪であり、第4図に小才ように一定ピンチでガイド用鋼
板上に溶接されている。鋼板lのみを渦巻状に走行させ
ようとしても剛性不足のため不可能であるが、このよう
に十分な剛性をもったガイド川す11板を採用しこれに
鋼板を重ね合わせることにより、板幅プJ向に垂直な状
態での走行か可能になる。第2図におl、%て9は炉内
温度を維持するためのヒータである。The guide steel plate 3 is made to travel by a group of rollers 4 arranged radially with respect to the center of the spiral. The guide roller 4 has grooves 4a at a constant pitch and is driven by a motor 8. The steel plate 1 runs along one outer surface of the guide steel plate 3 together with the guide steel plate. 3a is a claw that supports the edge of the steel plate, and is welded onto the guide steel plate with a certain pinch as shown in Fig. 4. It would be impossible to run only the steel plate l in a spiral shape due to lack of rigidity, but by adopting the guide river plate 11 with sufficient rigidity and overlapping the steel plates on it, the plate width can be reduced. It becomes possible to run perpendicular to the direction of the road. In FIG. 2, 1 and 9 are heaters for maintaining the temperature inside the furnace.
さて第1図において最内周まで達した銅板lとガイド用
鋼板3はデフレクタロールlOにより内周から離れへり
カルターン装置5に至る。ここで第2図 (E)に示す
ようにガイド用鋼板3はへりカルターン装置5によりそ
の幅方向を水平にかえながら上方へと走行する。一方鋼
板lは第2図(D)に示すように、ガイド用鋼板から別
れてデフレクタロール11およびへりカルターン装置1
6.デフレクタロール12により後続する二次冷却炉へ
送出される。Now, in FIG. 1, the copper plate 1 and the guide steel plate 3, which have reached the innermost periphery, are separated from the inner periphery by the deflector roll IO and reach the calturn device 5. Here, as shown in FIG. 2(E), the guide steel plate 3 travels upward while changing its width direction horizontally by the helical turn device 5. On the other hand, as shown in FIG. 2(D), the steel plate 1 is separated from the guide steel plate to include a deflector roll 11 and a helical turn device 1.
6. It is delivered by deflector rolls 12 to the subsequent secondary cooling furnace.
次いで、ガイド用鋼板3はデフレクタロール13を経て
再ひ渦巻走行の外周へと向う。第zti(c:+に示す
ようにガ・イド用鋼板3はデフレクタロール14、へり
カルターン装置6およびデフレクタロール15により(
■fひ元の位置に戻る。Next, the guide steel plate 3 passes through the deflector roll 13 and heads toward the outer periphery of the spiral running again. As shown in the zti (c:
■f Return to the original position.
なおガイF用鋼板3の鋼板エツジを支える爪3aのにi
PIは、仕様最大板幅に相当する位置となっている。Note that the claw 3a that supports the steel plate edge of the steel plate 3 for the guy F is
PI is located at a position corresponding to the specified maximum board width.
鋼板幅が最大幅より小さいときは本過時効炉入1」にお
ける鋼板エツジ位置は爪3aより上方となり、渦巻走行
中に徐々に下降して爪の位置まで来る。該炉入口におけ
る板エツジ位置を常に爪3aの4一方に維持するため、
ハースロール7はステアリングロールとすることが望ま
しい。When the steel plate width is smaller than the maximum width, the edge position of the steel plate in the main over-aging furnace 1 is above the claw 3a, and gradually descends to the claw position during spiral running. In order to always maintain the plate edge position at the furnace inlet on one side of the claws 3a,
It is desirable that the hearth roll 7 is a steering roll.
また鋼板表面マーク防止上鋼板lに用いる入側、出側の
へりカルターン装置2および16には第6図の気体浮−
L方式が望ましく、カイト用鋼板のへりカルターン装置
5および6t−1i特開昭55−8Of(41吋公報の
方式で充分である。In addition, in order to prevent marks on the steel plate surface, gas floats as shown in FIG.
The L method is preferable, and the method disclosed in JP-A-55-8Of (41-inch publication) for kite steel plate hem cal turn device 5 and 6t-1i is sufficient.
次に本発明の方式による過時妬炉の容量について説明す
る。該炉内の鋼板全長をり、渦巻路の内径をDI+外径
をD2 、渦巻ピッチをP(第3図1. 参照)
とすると
となる。−例としてDl =15m 、 D2 =20
m 、 P= 20mmの場合、L = 6900mと
なり、ラインス、ピード230m/分の炉で30分の過
時効処理かり能となる。Next, the capacity of the overage furnace according to the method of the present invention will be explained. Calculate the entire length of the steel plate in the furnace, the inner diameter of the spiral path is DI + the outer diameter is D2, and the spiral pitch is P (see Fig. 3, 1).
Then, it becomes . - For example Dl = 15m, D2 = 20
When m and P = 20 mm, L = 6900 m, which allows overaging treatment for 30 minutes in a furnace with a line speed of 230 m/min.
第5図は本発明の技術を用いた連続焼鈍炉の全体図であ
る。鋼板lは加熱炉30.灼熱炉40.−次冷却炉50
をへて本発明による過時効炉60に入る。FIG. 5 is an overall view of a continuous annealing furnace using the technique of the present invention. The steel plate l is heated in a heating furnace 30. Scorching furnace 40. -Next cooling furnace 50
After passing through, it enters an overaging furnace 60 according to the present invention.
その後二次冷却炉(第5図では水スプレー冷却)70、
ドライヤ71をへて出側ルーパーへと送出される。第5
図から明らかなように本発明の技術を用いれば長時間の
過時効処理をコンバク)・な炉で行えるばかりでなく、
過時効以降の全設備を全て低層建屋内に収めることがで
き建築費の大幅な節減にも蚕与することがでくる。After that, a secondary cooling furnace (water spray cooling in Fig. 5) 70,
It passes through the dryer 71 and is sent to the output looper. Fifth
As is clear from the figure, by using the technology of the present invention, not only can long-term overaging treatment be performed in a furnace, but also
All of the equipment used after aging can be housed in a low-rise building, resulting in significant savings in construction costs.
以上述べたように本発明によれば、長時間の過時効処理
を鋼板の走行を停止することなく行なうことができると
共に、コンパクトな実用性の高い長時間過時効炉の設備
技術を提供することが可能となる。従って、本発明は従
来不of能であった通當の素材(極低炭素鋼でない)を
用いた連続焼鈍によるDDQの製造を可能にする画期的
新技術であり、その利益は計りしれないものである。As described above, according to the present invention, it is possible to carry out long-term overaging treatment without stopping the running of the steel plate, and to provide equipment technology for a compact and highly practical long-term overaging furnace. becomes possible. Therefore, the present invention is a revolutionary new technology that makes it possible to manufacture DDQ by continuous annealing using conventional materials (not ultra-low carbon steel) that were previously impossible, and the benefits thereof are immeasurable. It is something.
第tv5は本発明を実施するための長時間過時効炉の
例を示す平面図、第2図(A) 、 (B) 、 (C
) 、 (D) 。
(E)、(F>はそれぞれ第1図A−A 、 B−B
、 C−C、D−D 、 E−E 、 F−F線断面図
、第3図は渦巻走行路の断面詳細図、第4図は第1図の
一線断面図、第5図は本発明を適用した連続焼鈍炉の1
実施例図、第6図は気体源」1式によるへりカルターン
装置を示す説明1閾、第7図はローラ式ヘリカルクーン
装置を示す説明図である。
l・・・鋼板、2,16・・・−・リカルターン装置(
鋼板用〕1.3・・・カイト用鋼板、3a・・・爪、4
・・・カイトローラ、4a・・・溝、5.6・・・へり
カルターン装置(カーfl:’≦i!l 4JyJlし
、7・・・ハースロール、8・・・モーフ、9・・・i
ニータ、10.+1.12,13,14.15・・・デ
フレフクロール、30・・・加熱炉、40・・・均熱炉
、50・・・−次冷却炉、60・・・過1111効炉、
70・・・二次冷却炉、71・・・トラrヤー、81・
・・ノスル。
第 7図
手 糸売ネH3j]玉書 (自発)
昭和58年7月す日
特許庁長官 若 杉 和 夫 1段
1、・バヂ1の表示
昭和58年特許願第95017号
2、発明の名称
鋼板の連続焼鈍方法
3、補正をする者
中1件との関係 出願人
住所 東京都千代田区大手町二丁116番3号名称
(665)新日本製鐵株式会社4、代 理 人
5、補正の対象 明細書の図面の簡単な説明の欄6、
補正の内容
(1)明細書fjr、9頁8行の「第4図は第1図の一
線」を[第4図は第1図のG−G線」と補正する。Part 5 is a long-term overaging furnace for carrying out the present invention.
Plan views showing examples, Figures 2 (A), (B), (C
), (D). (E) and (F> are shown in Figure 1 A-A and B-B, respectively)
, CC, D-D, E-E, FF line sectional views, FIG. 3 is a detailed sectional view of the spiral running path, FIG. 4 is a line sectional view of FIG. 1, and FIG. 5 is a cross-sectional view of the present invention. 1 of the continuous annealing furnace that applies
FIG. 6 is an explanatory diagram showing a helical Kuhn device using a single gas source; FIG. 7 is an explanatory diagram showing a roller-type helical Kuhn device. l...Steel plate, 2,16...--Recal turn device (
For steel plate] 1.3... Steel plate for kite, 3a... Claw, 4
...Kite roller, 4a...Groove, 5.6...Hedge cal turn device (car fl:'≦i!l 4JyJl, 7...Hearth roll, 8...Morph, 9... i
Neeta, 10. +1.12,13,14.15...deflation crawl, 30...heating furnace, 40...soaking furnace, 50...-cooling furnace, 60...super-1111 effect furnace,
70...Secondary cooling furnace, 71...Trayer, 81.
... Nosul. Figure 7 Hand Itotome H3j] Tamaki (self-motivated) July 1980 Commissioner of the Japan Patent Office Kazuo Wakasugi 1 paragraph 1 Badge 1 indication 1982 Patent Application No. 95017 2 Title of the invention Continuous annealing method for steel plates 3, relationship with one of the amendments Applicant address: 116-3 Otemachi 2-chome, Chiyoda-ku, Tokyo Name
(665) Nippon Steel Corporation 4, Agent 5, Subject of amendment: Brief description of drawings in the specification column 6,
Contents of correction (1) In specification fjr, page 9, line 8, ``Figure 4 is a line from Figure 1'' is corrected to ``Figure 4 is line GG in Figure 1''.
Claims (1)
るヒートサイクルを与える鋼板の連続焼鈍方法において
、−次冷却炉から送出された鋼板lをへりカルクーン装
;δ2により板幅方向が垂直となるよう11シ;向せし
め、akへりカルターン装置の出11において回一方向
に同一速度で走行するカイト川鋼板3に改ね合わせ、一
体となって走行する鋼板1とガイド用鋼板3とを放射状
に配列されたカイトローラfil 4の描4aに沿わせ
て外周から内周に向けて渦巻状に走行せしめ、最内周に
おいてガイド川鋼板3は鋼板1から分離してヘリカルク
ーン装置5および6を経て再び最外周に戻るとともに、
l\リカルターン装置5の位置においてガイド用鋼My
、3から分離した鋼板1をへりカルターン装置1Gによ
り再び板幅方向が水平となるよう転向せしめ、後続する
二次冷却炉に送出せしめて過時効を行なうことを特徴と
する銅板の連続焼鈍方法。In a continuous annealing method for steel plates that provides a heat cycle consisting of heating, scorching, secondary cooling, overaging, and secondary cooling, the steel plate l sent out from the secondary cooling furnace is placed in a Calcoon furnace; the width direction of the plate is vertical due to δ2. Then, at the output 11 of the ak edge cal turn device, the steel plate 1 and guide steel plate 3, which run as one, are aligned with the Kaitokawa steel plate 3, which runs at the same speed in one direction. The guide river steel plate 3 is separated from the steel plate 1 at the innermost circumference, and the guide river steel plate 3 is separated from the steel plate 1 and connected to the helical Kuhn devices 5 and 6. After returning to the outermost circumference,
l\ At the position of the recal turn device 5, the guide steel My
, 3. A continuous annealing method for a copper plate, characterized in that the steel plate 1 separated from the steel plate 1 is turned again so that the width direction of the plate becomes horizontal using an edge calturn device 1G, and then sent to a subsequent secondary cooling furnace for overaging.
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58095017A JPS59222534A (en) | 1983-05-31 | 1983-05-31 | Continuous annealing method of steel plate |
ES532780A ES8600785A1 (en) | 1983-05-31 | 1984-05-24 | Method and apparatus for continuously annealing a steel sheet. |
BR8402609A BR8402609A (en) | 1983-05-31 | 1984-05-30 | PROCESS AND APPARATUS FOR CONTINUOUS RECOVERY OF A STEEL STRIP |
DE8484106209T DE3467904D1 (en) | 1983-05-31 | 1984-05-30 | Method and apparatus for continuously annealing a steel sheet |
EP84106209A EP0127190B1 (en) | 1983-05-31 | 1984-05-30 | Method and apparatus for continuously annealing a steel sheet |
ZA844120A ZA844120B (en) | 1983-05-31 | 1984-05-30 | Method and apparatus for continuously annealing steel sheet |
CA000455421A CA1210671A (en) | 1983-05-31 | 1984-05-30 | Method and apparatus for continuously annealing steel sheet |
US06/615,528 US4497674A (en) | 1983-05-31 | 1984-05-31 | Method and apparatus for continuously annealing steel sheet |
ES537061A ES8506813A1 (en) | 1983-05-31 | 1984-10-25 | Method and apparatus for continuously annealing a steel sheet. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58095017A JPS59222534A (en) | 1983-05-31 | 1983-05-31 | Continuous annealing method of steel plate |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS59222534A true JPS59222534A (en) | 1984-12-14 |
JPS6256210B2 JPS6256210B2 (en) | 1987-11-25 |
Family
ID=14126242
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58095017A Granted JPS59222534A (en) | 1983-05-31 | 1983-05-31 | Continuous annealing method of steel plate |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPS59222534A (en) |
ZA (1) | ZA844120B (en) |
-
1983
- 1983-05-31 JP JP58095017A patent/JPS59222534A/en active Granted
-
1984
- 1984-05-30 ZA ZA844120A patent/ZA844120B/en unknown
Also Published As
Publication number | Publication date |
---|---|
ZA844120B (en) | 1985-03-27 |
JPS6256210B2 (en) | 1987-11-25 |
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