JPH09176744A - Production of steel for good drawable can excellent in material uniformity - Google Patents

Production of steel for good drawable can excellent in material uniformity

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Publication number
JPH09176744A
JPH09176744A JP33709895A JP33709895A JPH09176744A JP H09176744 A JPH09176744 A JP H09176744A JP 33709895 A JP33709895 A JP 33709895A JP 33709895 A JP33709895 A JP 33709895A JP H09176744 A JPH09176744 A JP H09176744A
Authority
JP
Japan
Prior art keywords
less
steel
weight
rolling
steel sheet
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
Application number
JP33709895A
Other languages
Japanese (ja)
Inventor
Akio Tosaka
章男 登坂
Kaneharu Okuda
金晴 奥田
Masatoshi Araya
昌利 荒谷
Hideo Kukuminato
英雄 久々湊
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 Steel Corp
Original Assignee
Kawasaki Steel Corp
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 Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP33709895A priority Critical patent/JPH09176744A/en
Publication of JPH09176744A publication Critical patent/JPH09176744A/en
Pending legal-status Critical Current

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  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Abstract

PROBLEM TO BE SOLVED: To produce a steel for good drawable can excellent in material uniformity by respectively specifying the hot finish rolling temp., the thickness in rolling, the coiling temp. and the draft in secondary cold rolling as for a steel having a specified componental compsn. SOLUTION: A steel contg., by weight, <=0.015% C, <=0.2% Si, <=0.6% Mn, <=0.02% P, <=0.02% S, <=0.15% Al, <=0.02% N, and the balance Fe with inevitable impurities is prepd. In this steel, hot finish rolling is finished at the Ar3 -30 deg.C or above, its thickness is regulated to <=2.6mm, and it is coiled in such a manner that the average coiling temp. is regulated to 640 to 750 deg.C, and, as for the coiling temp. in each part in the longitudinal direction, it is regulated to 680 to 750 deg.C from the head 0m to the head 20m, to 640 to 700 deg.C from the head 20m to the heel 100m, to 680 to 730 deg.C from the heel 100m to the heel 20m and to 710 to 750 deg.C from the tail 20m to the tail 0m. This hot rolled base sheet is subjected to cold rolling and continuous annealing and is subjected to secondary cold rolling at <=30% draft. Thus, the steel sheet having good press formability can be obtd.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、深絞り成形性に優
れ、かつ強度特性にも優れた極薄ブリキあるいはテイン
フリースチールなどの容器用鋼板で、特に製品板の長手
方向、幅方向の材質の均一性に優れた材料の原板の製造
方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container steel sheet such as an ultra-thin tin plate or a tin-free steel sheet which is excellent in deep drawability and strength characteristics, and particularly in the longitudinal and width directions of the product sheet. The present invention relates to a method for manufacturing a master plate of a material having excellent uniformity.

【0002】[0002]

【従来の技術】昨今、大量に消費されている飲料缶、1
8リットル缶、ペール缶などはその製造方法から、2ピ
ース缶と3ピース缶に大別することができる。2ピース
缶は錫めっき、クロームめっき、化成処理、塗油などの
処理を施した表面処理鋼板に、浅い絞り加工、DWI
(Drawn & Wall Ironed)加工、D
RD(Drawn and Redrawn)加工等の
加工を施し、これに蓋を取りつけた2部品からなる缶で
ある。3ピース缶は表面処理鋼板を円筒状又は角筒状に
曲げて端部を接合して缶胴を形成したのち、これに天蓋
と底蓋を取りつけた3部品からなる缶である。これらに
ついては、いずれも缶コストに占める素材コストの割合
が高いため鋼板のコスト低減の要求が強い。
2. Description of the Related Art Beverage cans, which are consumed in large quantities these days, 1
8 liter cans, pail cans and the like can be roughly classified into 2 piece cans and 3 piece cans according to their manufacturing methods. 2-piece cans are surface-treated steel sheets that have undergone treatments such as tin plating, chrome plating, chemical conversion treatment, and oil coating, with shallow drawing and DWI.
(Draw & Wall Ironed) processing, D
It is a two-part can that has been subjected to processing such as RD (Drawn and Redrawn) processing and that has a lid attached thereto. A three-piece can is a three-part can in which a surface-treated steel plate is bent into a cylindrical shape or a rectangular tube shape to join the ends to form a can body, and then a canopy and a bottom lid are attached to the can body. In these cases, there is a strong demand for steel plate cost reduction because the ratio of material cost to can cost is high.

【0003】軟質な鋼板を連続焼鈍法で製造するための
開発も行われ、例えば特公平1−52452号公報には
極低炭素鋼を用いて、それと焼鈍後の加工硬化の組合せ
で種々の硬さの缶用鋼板を作りわける技術が開示されて
いる。この場合、コストダウンの強い要求がありこれに
応えるために、1缶あたりの使用鋼板重量を減少させる
必要がある。しかし、よく知られているように鋼板の板
厚を減少させることは延性の劣化を伴うため、一般に加
工性あるいは成形性の劣化を招来し、単純な薄肉化材で
は、実際の使用にたえなかった。また薄肉化によって連
続焼鈍における鋼板の破断なども大きな問題となり、こ
のような製造技術上の問題も顕在化してきた。従って、
従来にも増してより高度な成形性を有する缶用鋼板の開
発が必要となった。
Development has also been carried out for producing a soft steel sheet by a continuous annealing method. For example, Japanese Patent Publication No. 52452/1989 uses ultra low carbon steel and combines it with work hardening after annealing to obtain various hardnesses. A technique for making steel plates for cans is disclosed. In this case, there is a strong demand for cost reduction, and in order to meet this demand, it is necessary to reduce the weight of steel plate used per can. However, as is well known, reducing the plate thickness of a steel sheet causes deterioration of ductility, which generally leads to deterioration of workability or formability.In a simple thinning material, it is not suitable for practical use. There wasn't. Further, thinning causes a serious problem such as breakage of a steel plate during continuous annealing, and such a problem in manufacturing technology has become apparent. Therefore,
It has become necessary to develop steel plates for cans that have higher formability than ever before.

【0004】また、近年はこれら製缶工程においても、
工程の高速化・連続化延・自動化が大幅に進展した。こ
れにより、従来にも増して材料の特性の均一化が強く要
求されるようになった。材料の特性がばらつくことは直
接的に製缶のトラブルを招くのみならず、製缶条件の適
正化調整の頻度の増加、ならびに缶体の形状精度の劣化
など多くの弊害をもたらすからである。
In recent years, even in these can manufacturing processes,
Significant progress has been made in speeding up processes, extending processes, and automating processes. As a result, there is a strong demand for more uniform material properties than ever before. This is because variations in the characteristics of materials not only directly cause troubles in can making, but also cause many adverse effects such as an increase in the frequency of proper adjustment of can making conditions and deterioration of the shape accuracy of the can body.

【0005】特公昭55−36051号公報には、連続
焼鈍法により製造する低炭素アルミキルド鋼を対象とし
て、その熱延後のホットラン冷却に関連し、コイルの先
端および後端のそれぞれ20〜200mにわたり冷却水
を噴射することなく巻取る技術が開示されている。しか
し、この技術は明細書中の実施例からも明らかなよう
に、C量が0.05〜0.06重量%と高いものであり
最終の材質としてr値のレベルもたかだか1.6以下と
低い値にとどまっている。
Japanese Patent Publication No. 55-36051 discloses a low carbon aluminum killed steel manufactured by a continuous annealing method, which is related to hot run cooling after hot rolling, and extends from 20 to 200 m at each of the front and rear ends of a coil. A technique of winding the cooling water without jetting the cooling water is disclosed. However, as is clear from the examples in the specification, this technique has a high C content of 0.05 to 0.06% by weight, and the r value of the final material is at most 1.6 or less. It stays low.

【0006】より高い成形性が要求される極低炭素缶用
鋼板にこの特公昭55−36051号公報の技術を適用
したところ、詳細な機構は不明であるが、材質の均一化
は達成されなかった。おそらくは炭化物の粗大・凝集化
現象が全く異なるためと推定される。これは缶用鋼板で
は、一般の冷延鋼板と比較して、一般に熱延母板の厚み
が薄く、幅が狭いなどの形状の違いに加え、例えば熱延
仕上げ圧延温度が高い適用する仕上げ圧延条件が異なる
などことも原因の1つであると考えられる。
When the technique of JP-B-55-36051 is applied to a steel plate for an ultra-low carbon can which requires higher formability, the detailed mechanism is unknown, but the homogenization of the material is not achieved. It was It is presumed that this is probably because the phenomena of coarsening and agglomeration of carbides are completely different. Compared with general cold-rolled steel sheets, this is because the hot-rolled mother board is generally thinner and narrower than ordinary cold-rolled steel sheets. It is considered that one of the causes is that the conditions are different.

【0007】いずれにしても、成形性に優れた缶用鋼板
を製造するにあたり、高い材質の均一性をコイル長手方
向にわたって確保する手段はこれまでなかった。
In any case, in producing a steel sheet for a can having excellent formability, there has been no means for ensuring high material uniformity in the longitudinal direction of the coil.

【0008】[0008]

【発明が解決しようとする課題】上記の従来技術では、
厳しい加工性を要求される容器用鋼板の加工性の仕様を
満足しつつ、薄肉化が達成できるような鋼板の高成形性
を実現できなかった。また、鋼板の材質も、コイルの長
手方向および幅方向でばらつくことを回避できなかっ
た。
In the above prior art,
It has not been possible to realize the high formability of a steel sheet that can achieve thinning while satisfying the specifications of the workability of a steel sheet for containers, which requires severe workability. In addition, the material of the steel plate cannot be prevented from varying in the longitudinal direction and the width direction of the coil.

【0009】本発明は主として深絞り成形を行う、2ピ
ース缶に向けられる容器用鋼板としての成形性を満足し
つつ、鋼板コイルの長手方向・幅方向に極めて安定した
機械的性質を有する鋼板の製造方法を提供することを目
的とするものである。
The present invention is directed to a steel sheet having a mechanical property that is extremely stable in the longitudinal direction and the width direction of the steel sheet coil while satisfying the formability as a steel sheet for a container, which is mainly for deep drawing and is intended for a two-piece can. It is intended to provide a manufacturing method.

【0010】[0010]

【課題を解決するための手段】本発明者らは、上記の目
的を達成するために、成分および熱延条件を検討しつ
つ、さらに容器用鋼板の使用特性についてそれを支配す
る冶金的な検討を行い以下の知見を得た。まず、深絞り
を行う2ピース缶の軽量化・薄肉化を行う際に要求され
る重要な特性は以下である。
In order to achieve the above-mentioned object, the present inventors have studied the components and hot rolling conditions, and further, the metallurgical studies that govern the usage characteristics of the steel sheet for containers. The following findings were obtained. First, the important characteristics required for weight reduction and thickness reduction of a two-piece can subjected to deep drawing are as follows.

【0011】(a)顕著な薄肉化が進むと高い平均r値
は成形時のしわ発生の防止、破断の防止に極めて有効
で、1.4以上は必須である。 (b)r値の面内異方向性(Δr)は小さい方が望まし
く、絶対値で0.4以下とすることが望ましい。 Δr={(rL +r90)/2}−r45 ただし、rL ;圧延方向、r90;圧延方向と直角な方向 r45;圧延方向と45°の方向 (c)肌あれ現象は外観を損なうのでこれを避けるた
め、均一微細な結晶粒とすることが望ましい。
(A) When the wall thickness is remarkably reduced, a high average r value is extremely effective in preventing wrinkling and breaking during molding, and 1.4 or more is essential. (B) The in-plane anisotropy (Δr) of the r value is preferably small, and is preferably 0.4 or less in absolute value. Δr = {(r L + r 90 ) / 2} -r 45 where r L is the rolling direction, r 90 is the direction perpendicular to the rolling direction r 45 is the direction between the rolling direction and 45 ° (c) The rough surface is the appearance In order to avoid this, it is desirable to make uniform and fine crystal grains.

【0012】(d)高いr値、高い伸びは、プレス成形
時の安定性を確保するのに有利である。 (e)缶用鋼板は鋼板のエッジの極近傍まで使用される
ため、長手方向・幅方向に亘って高い材質均一性が必要
である。 これらの特性を満足すべく、鋼の成分と製造条件の組合
せについて種々の検討を行い以下の知見を得た。すなわ
ち本発明は C:0.015重量%以下 Si:0.2重量%以下 Mn:0.6重量%以下 P:0.02重量%以下 S:0.02重量%以下 Al:0.15重量%以下 N:0.02重量%以下 を含有し、残部Fe及び不可避的不純物から成る鋼を、
(Ar3 −30℃)以上の温度で熱間仕上圧延を終了
し、厚みを2.6mm以下とし、平均巻取温度640〜
750℃で、かつ、長手方向各部の巻取温度を、 先端0m〜先端20m:680〜750℃ 先端20m〜後端100m:640〜700℃ 後端100m〜後端20m:680〜730℃ 後端20m〜後端0m:710〜750℃ として巻取り、この熱延母板を冷間圧延、連続焼鈍を経
て圧下率30%以下の2次冷間圧延することを特徴とす
る材質均一性に優れた良絞り成形性缶用鋼板の製造方法
である。
(D) A high r value and a high elongation are advantageous for ensuring stability during press molding. (E) Since the steel sheet for cans is used up to the very vicinity of the edge of the steel sheet, high material uniformity is required in the longitudinal direction and the width direction. In order to satisfy these characteristics, various studies were conducted on the combination of steel components and manufacturing conditions, and the following findings were obtained. That is, the present invention is C: 0.015 wt% or less Si: 0.2 wt% or less Mn: 0.6 wt% or less P: 0.02 wt% or less S: 0.02 wt% or less Al: 0.15 wt% % Or less N: 0.02% by weight or less, and a steel containing the balance Fe and unavoidable impurities,
The hot finish rolling is completed at a temperature of (Ar 3 -30 ° C) or higher, the thickness is reduced to 2.6 mm or less, and the average coiling temperature is 640 to 640.
At 750 ° C., the winding temperature of each part in the longitudinal direction is as follows: Tip 0 m to tip 20 m: 680 to 750 ° C. Tip 20 m to trailing end 100 m: 640 to 700 ° C. Trailing end 100 m to trailing end 20 m: 680 to 730 ° C. Trailing end 20 m-rear end 0 m: wound at 710 to 750 ° C., cold-rolled and continuously annealed, and then secondary cold-rolled at a reduction rate of 30% or less, excellent in material uniformity. It is a method for producing a steel sheet for cans having good drawability.

【0013】さらに上記製造方法において選択的添加元
素として A群 Nb:0.003〜0.015重量% Ti:0.003〜0.015重量% のうち1種又は2種以上 B群 Cu:0.5重量%以下 Ni:0.5重量%以下 Cr:0.5重量%以下 Mo:0.2重量%以下 のうち1種又は2種以上から選ばれたA群又はB群の何
れか一方又は双方を含有することとすれば好適である。
Further, in the above-mentioned manufacturing method, one or more of Group A Nb: 0.003 to 0.015 wt% Ti: 0.003 to 0.015 wt% as a selectively added element Group B Cu: 0 0.5% by weight or less Ni: 0.5% by weight or less Cr: 0.5% by weight or less Mo: 0.2% by weight or less One of Group A or Group B selected from one or more of Alternatively, it is preferable to include both.

【0014】[0014]

【発明の実施の形態】本発明は、極低C鋼を素材とし
て、熱延条件として仕上圧延温度と、巻取り温度を規制
するとともに、特に巻取り温度をコイルの長手方向で規
制することにより、材質均一性に優れた良絞り成形性鋼
板を製造するものである。成形性の向上は主として高い
r値と高い伸びにより確保される。成分と熱延条件がそ
の要点である。また高い材質均一性の確保のためには、
成分などの規制に加えて、仕上げ圧延後の巻取り温度条
件のコイル長手方向のパターン制御で達成する。
BEST MODE FOR CARRYING OUT THE INVENTION The present invention uses an extremely low C steel as a raw material to regulate the finishing rolling temperature and the winding temperature as hot rolling conditions, and particularly by regulating the winding temperature in the longitudinal direction of the coil. The present invention is to produce a good drawability steel sheet having excellent material uniformity. The improvement in formability is ensured mainly by the high r value and the high elongation. The ingredients and hot rolling conditions are the key points. In order to ensure high material uniformity,
This is achieved by controlling the pattern in the coil longitudinal direction under the winding temperature condition after finish rolling in addition to the regulation of the components and the like.

【0015】以下におのおのの限定理由を含む本発明の
実施の形態について述べる。 C:C量が0.015重量%を越えると最終的な材質の
変動が増加することに加え、製造条件を適正化しても、
最終的に、1.4を越える高いr値を得ることはできな
い。また、C量を0.015重量%以下の範囲に制限す
ることによって実用上問題のないレベルに鋼板の時効性
を容易に調整することができる。またC量が0.015
重量%を越えると延性(伸び)の劣化も顕著となり、成
形性はr値の低下との相乗効果によって大きく劣化す
る。従って、C量は概ね0.015重量%以下とする必
要がある。さらに加工性を重要視するのであれば、0.
0050重量%以下が望ましい。C量の下限は特に制限
はないが、C量が低減すれば、結晶粒の粗大化の傾向が
現われるので、特に肌あれに対する規制が厳格な用途に
おいては、C量は0.0010重量%以上とすることが
望ましい。
The embodiments of the present invention including the respective reasons for limitation will be described below. C: If the amount of C exceeds 0.015% by weight, the fluctuation of the final material increases, and even if the manufacturing conditions are optimized,
Finally, it is not possible to obtain high r-values above 1.4. Further, by limiting the C content to the range of 0.015% by weight or less, the aging property of the steel sheet can be easily adjusted to a level at which there is no practical problem. Also, the C content is 0.015
When the content exceeds 10% by weight, ductility (elongation) is significantly deteriorated, and the formability is greatly deteriorated due to a synergistic effect with a decrease in r value. Therefore, the amount of C needs to be approximately 0.015% by weight or less. Further, if the workability is important, 0.
It is desirable that the content be 0050% by weight or less. The lower limit of the amount of C is not particularly limited, but if the amount of C is reduced, the tendency of crystal grains to coarsen appears. Therefore, in applications where the regulation for rough skin is strict, the amount of C is 0.0010% by weight or more. Is desirable.

【0016】Si:Si含有量が0.2重量%を越える
と鋼板の表面性状が劣化し、表面処理鋼板として望まし
くないばかりでなく、鋼が硬化して熱延工程が困難化す
る。ので上限を0.2重量%とした。さらに望ましくは
0.05重量%以下である。 Mn:Mnは概ね0.05重量%以上は添加しないとS
を低下させた場合でもいわゆる熱間脆性を回避すること
が困難で、表面割れ等の問題を生ずることがある。また
Mnは鋼板を大きな延性の低下を伴わずに、固溶強化す
ることに加え鋼板の変態点を低下させる元素であるため
鋼板の熱延仕上げ温度条件を緩和するために有効であ
る。また、0.6重量%を越えて添加した場合は、詳細
な機構は不明であるが良好な高いr値が得られる熱延条
件が極めて狭くなるため、安定した操業が困難となる。
また得られるr値のレベルも低下する傾向にある。加工
性が特に重要な場合には、0.5重量%以下とすること
が望ましい。
Si: If the Si content exceeds 0.2% by weight, the surface properties of the steel sheet deteriorate, which is not desirable as a surface-treated steel sheet, and the steel hardens to make the hot rolling process difficult. Therefore, the upper limit was made 0.2% by weight. More preferably, it is 0.05% by weight or less. Mn: Mn is approximately 0.05% by weight or more unless S is added to S
It is difficult to avoid so-called hot embrittlement even when the value is decreased, and problems such as surface cracking may occur. Further, Mn is an element that solid-solution strengthens the steel sheet without significantly lowering the ductility and also lowers the transformation point of the steel sheet, so that it is effective for relaxing the hot rolling finish temperature condition of the steel sheet. On the other hand, if the amount of addition exceeds 0.6% by weight, the detailed mechanism is unclear, but the hot rolling conditions for obtaining a good high r value become extremely narrow, which makes stable operation difficult.
Also, the level of r value obtained tends to decrease. When workability is particularly important, it is desirable to set it to 0.5% by weight or less.

【0017】P:Pの低減により、加工性の改善と耐食
性の改善効果が得られるが、概ね0.02重量%以下と
すればほぼ充分な効果が得られることに加え、過度の低
減は、製造コストの増加につながり望ましくない。 S:Sは加工性の改善の面から低減する必要がある。概
ね0.02重量%以下とすることで顕著に加工性(特に
伸びフランジ特性)が改善されるが、さらなる低減は大
きな改善効果が得られず、製造コストの増大につなが
る。ただし、特に高度な局部延性が要求される場合は
0.01重量%以下に低減することが望ましい。
P: By reducing P, workability and corrosion resistance can be improved. However, if the content is 0.02% by weight or less, a sufficient effect can be obtained, and an excessive reduction is This is not desirable because it increases the manufacturing cost. S: S needs to be reduced from the viewpoint of improving workability. By setting the content to about 0.02% by weight or less, the workability (particularly the stretch flange characteristic) is remarkably improved, but a further reduction does not provide a significant improvement effect, leading to an increase in manufacturing cost. However, when particularly high local ductility is required, it is desirable to reduce the content to 0.01% by weight or less.

【0018】N:Nはr値向上の観点からは概ね0.0
20重量%以下にする必要がある。さらに良好なr値の
レベル、安定した(時効特性)が必要な場合は、0.0
050重量%以下に低減することが望ましい。 Al:Alは脱酸材として、清浄度を向上させるために
その添加が必要である。材質上の観点からは特に最低限
度を定める必要はないが、清浄度の向上のためという観
点では、概ね0.005重量%程度の添加が望ましい。
しかし、0.15重量%を越えて添加した場合はその清
浄度改善効果が飽和することに加え、製造コストの上
昇、表面欠陥発生傾向の増大などの問題を生ずる。これ
らを勘案しさらに望ましい範囲は0.02〜0.08重
量%である。
N: N is approximately 0.0 from the viewpoint of improving the r value.
It should be 20% by weight or less. If a better r-value level and stable (aging property) are required, 0.0
It is desirable to reduce it to 050% by weight or less. Al: Al is a deoxidizing agent, and its addition is necessary to improve cleanliness. Although it is not necessary to determine the minimum level from the viewpoint of material quality, from the viewpoint of improving cleanliness, it is desirable to add approximately 0.005% by weight.
However, if the amount added exceeds 0.15% by weight, the effect of improving the cleanliness is saturated, and there are problems such as an increase in manufacturing cost and an increase in the tendency of surface defects to occur. Considering these, a more desirable range is 0.02 to 0.08% by weight.

【0019】以上が本発明の必須元素であり、選択添加
元素としてNb,Tiがある。 Nb:Nbはr値の向上、鋼の組織の微細化、時効性の
安定化に有効であり、このような望ましい効果を発揮さ
せるにC含有量に応じて添加する必要があるが概ね0.
003重量%以上の添加でこのような望ましい効果が発
揮される。一方、0.02重量%を超えて添加した場合
は、再結晶温度が顕著に上昇して、焼鈍工程に支障をき
たす。特にr値を高める必要がある場合は0.01〜
0.015重量%の範囲で添加することが望ましい。
The above are the essential elements of the present invention, and Nb and Ti are selective addition elements. Nb: Nb is effective in improving the r-value, refining the microstructure of steel, and stabilizing the aging property, and it is necessary to add it in accordance with the C content in order to exert such a desired effect, but it is generally 0.
Addition of 003% by weight or more exerts such a desired effect. On the other hand, if it is added in excess of 0.02% by weight, the recrystallization temperature rises remarkably, and the annealing process is hindered. Especially when it is necessary to increase the r value, 0.01 to
It is desirable to add it in the range of 0.015% by weight.

【0020】Ti:Tiは鋼板の組織の微細化に有効な
元素であり、またCの一部を固定することによる時効性
の調整作用があり、添加することで材質の改善が図れる
ので選択添加が望ましい。これらの望ましい効果が発揮
されるのは概ね0.003重量%以上の添加量からであ
る。しかしながら、添加量が0.020重量%を超える
と熱間圧延後の組織の不均一性を生ずる可能性が大きく
なり、また表面外観・耐食性の劣化も懸念される。従っ
て0.0030〜0.020重量%とするが、強度と延
性のバランスを考慮した場合にさらに望ましいのは0.
0080〜0.012重量%の範囲である。
Ti: Ti is an element effective for refining the microstructure of the steel sheet, and has the effect of adjusting the aging property by fixing a part of C, and the addition of Ti can improve the material quality, so it is a selective addition. Is desirable. These desirable effects are exhibited from an addition amount of approximately 0.003% by weight or more. However, if the addition amount exceeds 0.020% by weight, there is a high possibility that the nonuniformity of the structure after hot rolling will occur, and the surface appearance and corrosion resistance may deteriorate. Therefore, the content is 0.0030 to 0.020% by weight, but more preferable is 0.00 in consideration of the balance between strength and ductility.
It is in the range of 0080 to 0.012% by weight.

【0021】Cu,Ni,Cr,Mo:これらの元素は
鋼の延性を劣化させることなく、強度を増加させること
ができるので、目標とする鋼板の強度レベルに応じて添
加することが望ましい。またこれらの元素は鋼板の耐食
性を向上させる効果もある。これらの効果が発揮される
ためには、これらを1種又は2種以上少なくともそれぞ
れ0.01重量%以上の添加が必要であり、おおむね
0.5重量%程度で飽和する傾向を示す。さらなる添加
はコストの上昇をもたらすので、上限をCu,Ni,C
rでは0.5重量%とし、Moでは0.2重量%とす
る。これらの元素は単独に添加してもよくまた、複合し
て添加してもそれらの効果が相殺されることはない。
Cu, Ni, Cr, Mo: Since these elements can increase the strength without deteriorating the ductility of the steel, it is desirable to add them according to the target strength level of the steel sheet. Further, these elements also have the effect of improving the corrosion resistance of the steel sheet. In order to exert these effects, it is necessary to add at least 0.01% by weight of at least one of these or two or more of them, and there is a tendency to saturate at about 0.5% by weight. Since further addition causes an increase in cost, the upper limits are Cu, Ni, C.
r is 0.5% by weight, and Mo is 0.2% by weight. These elements may be added alone or in combination, and their effects are not offset.

【0022】次に製造条件について説明する。スラブは
成分の偏りを最小限にするために連続鋳造法で製造する
ことが望ましい。鋳造後のスラブは通常のように、一旦
冷却してから再加熱してもよく、また、温片のままで加
熱炉に挿入してもよい。スラブは通常の手法で粗圧延さ
れ20〜70mm厚みのシートバーとする。
Next, manufacturing conditions will be described. It is desirable that the slab be manufactured by a continuous casting method in order to minimize the component bias. The slab after casting may be cooled once and then reheated as usual, or may be inserted into the heating furnace as a hot piece. The slab is roughly rolled by a usual method to obtain a sheet bar having a thickness of 20 to 70 mm.

【0023】上記シートバーは材質レベルの向上、材質
の均一性の向上のために仕上げ圧延に入る前に一旦、コ
イルボックスに巻取ってもよい。これにより顕著な材質
レベルの向上、特にr値の向上が達成される。仕上げ圧
延機入側でのシートバーエッジヒータの使用は望まし
い。通常の圧延では粗圧延工程まででも鋼板の幅方向に
顕著な温度分布を生じており、エッジ部は幅方向中央部
よりも50℃以上低い温度となっている。これを補償す
べくエッジヒータで加熱を行うことが本発明で目指す全
長・全幅方向の材質均一に対しては有利な条件となる。
The sheet bar may be wound around a coil box before starting the finish rolling in order to improve the material level and the uniformity of the material. As a result, a remarkable improvement in the material level, particularly an improvement in the r value, is achieved. The use of seat bar edge heaters on the entry side of the finishing mill is desirable. In ordinary rolling, a remarkable temperature distribution is generated in the width direction of the steel sheet even up to the rough rolling step, and the edge portion has a temperature lower by 50 ° C. or more than the center portion in the width direction. Heating with an edge heater to compensate for this is an advantageous condition for uniforming the material in the entire length and width directions, which is the objective of the present invention.

【0024】熱間仕上圧延温度:(Ar3 −30℃)以
上 熱間仕上圧延温度の制限は材質レベルの向上と鋼板の組
織の均一・微細化のために必要である。即ち、この温度
が(Ar3 変態点−30℃)未満となり、臨界量を超え
るフェライト相が出現する温度域になると、生成したフ
ェライトが加工され、これが完全に歪みを解放できない
ままに急冷されるため極めて不均一な熱延板組織とな
り、この不均一性は冷延・焼鈍を経た後も完全には除去
されず、缶用鋼板としての適性が劣化する。従って、仕
上げ圧延温度は(Ar3 変態点−30℃)以上とする。
上限は材質の安定性並びに圧延ロールの摩耗などによっ
て決定される。従って、本発明では仕上げ圧延温度は
(Ar3 変態点−30℃)以上とした。さらに望ましい
のは(Ar3 変態点−20℃)以上である。
Hot Finishing Rolling Temperature: (Ar 3 -30 ° C.) or higher Limiting the hot finishing rolling temperature is necessary for improving the material level and making the structure of the steel sheet uniform and fine. That is, when this temperature falls below (Ar 3 transformation point −30 ° C.) and reaches a temperature range in which a ferrite phase exceeding the critical amount appears, the generated ferrite is processed and rapidly cooled without completely releasing the strain. Therefore, an extremely nonuniform hot rolled sheet structure is formed, and this nonuniformity is not completely removed even after cold rolling and annealing, and the suitability as a steel sheet for cans deteriorates. Therefore, the finish rolling temperature is set to (Ar 3 transformation point −30 ° C.) or higher.
The upper limit is determined by the stability of the material and the wear of the rolling roll. Therefore, in the present invention, the finish rolling temperature is set to (Ar 3 transformation point −30 ° C.) or higher. More desirable is (Ar 3 transformation point −20 ° C.) or higher.

【0025】冷却:仕上げ圧延終了後の冷却も重要な要
件の一つであるが、熱延後に鋼板を水で冷却する場合
に、鋼板の幅方向に均一に冷却することが好ましい。冷
却水はノズルより噴出し、鋼板に衝突するが、直接衝突
した位置は最も大きな冷却効率を有することと、エッジ
部は中央部に比して冷却効率が高いという現象が確認さ
れた。このような不均一性を解決する手段として鋼板の
エッジ部に直接冷却水がかからないような設備的な検討
を行った結果、エッジ部を50〜150mmの範囲で冷
却水のマスキングを行ったところ良好な結果となった。
このマスキングは鋼板の上面及び下面の両方において行
うことが最も望ましいが、少なくとも一方で実施すれば
効果がある。
Cooling: Cooling after finishing rolling is one of the important requirements, but when the steel sheet is cooled with water after hot rolling, it is preferable to cool it uniformly in the width direction of the steel sheet. Although the cooling water was ejected from the nozzle and collided with the steel plate, it was confirmed that the position where it collided directly had the greatest cooling efficiency and the edge part had higher cooling efficiency than the central part. As a result of conducting a facility-based study so that the cooling water does not directly reach the edge portion of the steel sheet as a means for solving such non-uniformity, it was found that the cooling water was masked in the edge portion within a range of 50 to 150 mm. It was a result.
This masking is most preferably performed on both the upper surface and the lower surface of the steel sheet, but it is effective if it is performed on at least one of them.

【0026】巻取温度:(640℃以上750℃以下) 熱延巻取温度は640℃以上とすることで巻取り後にコ
イル状態での自己焼鈍が進行し、熱延母板の幅方向の均
一性が向上する。またこれにより必要最低限の窒化アル
ミの析出が進行し、冷延焼鈍後の材質とくにr値が改善
される。しかし750℃を超えると部分的に粗大な異常
粒が発生する危険性が増す。従って熱延平均巻取温度は
640℃以上750℃以下とした。特に高いr値が必要
な用途では680℃以上の巻取温度がさらに好適であ
る。
Winding temperature: (640 ° C. or more and 750 ° C. or less) By setting the hot rolling winding temperature to 640 ° C. or more, self-annealing in a coil state progresses after winding, and the width of the hot rolled mother plate is uniform. The property is improved. Further, by this, the minimum necessary precipitation of aluminum nitride proceeds, and the material, especially r value, after cold rolling annealing is improved. However, if the temperature exceeds 750 ° C, there is an increased risk of partially producing coarse abnormal grains. Therefore, the hot rolling average winding temperature is set to 640 ° C. or higher and 750 ° C. or lower. A coiling temperature of 680 ° C. or higher is more suitable for applications requiring a particularly high r value.

【0027】しかし、本発明においては、コイルの長手
方向の材質均一性を達成するため、長手方向にコイルの
巻取り温度を以下のように制限・規定する。すなわち、 (a)熱延コイルの先端から20mまでは680〜75
0℃の範囲とする。これは、コイラに巻取られたのち、
この部分がマンドレルによってあるいは、その冷却水に
よって強力に冷却されるためである。 (b)先端20m〜後端100mまでは640〜700
℃の範囲とする。この部分はコイル長手方向の中央部に
あたり、十分な自己焼鈍効果が働くためである。 (c)後端100m〜後端20mの範囲は680〜75
0℃の温度範囲とする。この部分はコイルのいわゆる外
巻き部分に相当し、コイル内部に比して、より速い冷却
速度条件で冷却されるためである。また詳細な機構は不
明であるが、この部分の温度をやや高めに設定すること
で、最終的に材質の均一化に有利なことが確認された。 (d)後端20m〜後端0mまでは700〜750℃の
温度範囲とする。この部分は特に上記の冷却効果が強い
ためさらに巻取り温度を上昇させる必要があるためであ
る。
However, in the present invention, in order to achieve the uniformity of the material in the longitudinal direction of the coil, the coiling temperature of the coil in the longitudinal direction is limited / specified as follows. That is, (a) 680 to 75 from the tip of the hot rolled coil to 20 m
The range is 0 ° C. This was taken up by the coiler,
This part is strongly cooled by the mandrel or its cooling water. (B) 640 to 700 from the front end 20m to the rear end 100m
It shall be in the range of ° C. This is because this portion corresponds to the central portion in the longitudinal direction of the coil and a sufficient self-annealing effect works. (C) The range from the rear end 100 m to the rear end 20 m is 680 to 75
The temperature range is 0 ° C. This part corresponds to the so-called outer winding part of the coil, and is cooled under a faster cooling rate condition than the inside of the coil. Although the detailed mechanism is unknown, it was confirmed that setting the temperature of this part to be slightly higher is finally advantageous in homogenizing the material. (D) A temperature range of 700 to 750 ° C. is set from the rear end 20 m to the rear end 0 m. This is because the above-mentioned cooling effect is particularly strong in this portion, and the winding temperature needs to be further increased.

【0028】このように、鋼板コイルの長手方向で巻取
り温度を調整することによって、最終的な鋼板製品の材
質均一化が達成されることが判明したが、それは、熱延
母板中の析出物、主として、MnS,AlNの析出量、
および析出形態が長手方向に均一化されるためであるこ
とが、調査結果より推定された。Nb,Tiなどが選択
元素として添加された場合にはそれらの析出量・析出状
態が鋼板の長手方向にさらに均一化されることになる。
As described above, it was found that by adjusting the coiling temperature in the longitudinal direction of the steel sheet coil, the final homogenization of the material of the steel sheet product can be achieved. Substances, mainly MnS and AlN precipitation amounts,
It was estimated from the results of the investigation that the precipitation morphology was uniform in the longitudinal direction. When Nb, Ti, etc. are added as selective elements, their precipitation amount / precipitation state becomes more uniform in the longitudinal direction of the steel sheet.

【0029】熱延母板の厚み:上記の熱延母板の厚みは
2.6mm以下とする必要がある。詳細な機構は不明で
あるが、仕上厚みを2.6mm以下とすることによっ
て、組織の均一微細化、板厚方向の歪み分布の均一化な
どが達成される。さらに材質の面で望ましいのは厚み
2.0mm以下であり、最終の製品厚みが極薄で、比較
的軟質なものが要求される場合は1.2mm以下とする
とさらに好適である。熱延コイルは通常の脱スケール方
法で表面のスケールを除去し冷延に供する。
Thickness of hot-rolled mother plate: The thickness of the hot-rolled mother plate must be 2.6 mm or less. Although the detailed mechanism is unclear, by setting the finishing thickness to 2.6 mm or less, uniform microstructure and uniform strain distribution in the plate thickness direction can be achieved. Further, in terms of material, the thickness is preferably 2.0 mm or less, and more preferably 1.2 mm or less when the final product thickness is extremely thin and relatively soft one is required. The hot-rolled coil is used for cold rolling after removing the scale on the surface by a normal descaling method.

【0030】冷間圧下:冷間圧下率については特に規制
はないが概ね75〜98%の範囲が再結晶焼鈍時の集合
組織制御を安定して行うには有利である。冷延圧下率が
75%未満では鋼板組織の十分な均一微細化を図ること
ができず、r値のレベルも低い。冷延圧下率が高いほ
ど、r値は改善されるが98%を超えると鋼が顕著に硬
化し、圧延が困難になることに加え、Δr値が負の大き
な値を示すようになり望ましくない。従って冷延圧下率
は75〜98%とするが平均r値、Δr値のバランスか
らさらに望ましくは83〜92%の範囲である。
Cold rolling: There is no particular restriction on the cold rolling reduction, but a range of approximately 75 to 98% is advantageous for stable texture control during recrystallization annealing. If the cold rolling reduction is less than 75%, it is not possible to achieve a sufficiently uniform refinement of the steel sheet structure, and the r value is low. The higher the cold rolling reduction is, the more the r value is improved, but if it exceeds 98%, the steel is significantly hardened, which makes rolling difficult, and the Δr value becomes a large negative value, which is not desirable. . Therefore, the cold rolling reduction rate is set to 75 to 98%, but more preferably 83 to 92% in view of the balance between the average r value and the Δr value.

【0031】連続焼鈍:冷間圧延後の焼鈍温度は再結晶
温度以上とする。特殊な用途においては再結晶温度以下
のいわゆる部分再結晶組織が適用可能であるが、材質の
安定性の観点からは望ましくない。従って、焼鈍温度は
再結晶温度以上とした。 2次冷延:また、鋼板強度を焼鈍ままの状態からさらに
増加させるために、30%以下の2次冷延を付与するこ
とも有効である。2次冷延の付与による加工硬化の利用
は大幅なコストの増加を伴わないことと、均一伸びは劣
化するが局部伸びは劣化しないことから、かなり広い用
途に適用でき、有利な方法である。しかし、2次冷延で
30%を越えて強化した場合は降伏強度の面内異方性が
顕著となり、また、これに付随してイヤリングの発生も
顕在化してくるため製品の適用範囲が規制される。従っ
て、焼鈍度の2次冷却圧下率は30%以下とする。10
%以下とすることによって、さらに良好な加工性を維持
することができる。
Continuous annealing: The annealing temperature after cold rolling should be higher than the recrystallization temperature. A so-called partial recrystallization structure having a recrystallization temperature or lower can be applied for a special use, but it is not desirable from the viewpoint of material stability. Therefore, the annealing temperature is set to the recrystallization temperature or higher. Secondary cold rolling: In order to further increase the strength of the steel sheet from the as-annealed state, it is also effective to apply a secondary cold rolling of 30% or less. The use of work hardening by imparting secondary cold rolling does not involve a significant increase in cost, and uniform elongation deteriorates but local elongation does not deteriorate. Therefore, it is applicable to a considerably wide range of applications and is an advantageous method. However, when strengthened by more than 30% by secondary cold rolling, the in-plane anisotropy of yield strength becomes remarkable, and the occurrence of earrings becomes conspicuous with this, so the product application range is restricted. To be done. Therefore, the secondary cooling reduction rate of the annealing degree is set to 30% or less. 10
By setting the content to be not more than%, it is possible to maintain even better workability.

【0032】連続圧延と潤滑圧延の適用その他:連続圧
延と潤滑圧延は必須条件ではないが、これらを行うこと
で安定した熱延が可能となるとともに鋼板の形状も安定
する。また詳細な機構は不明であるが、鋼板の長手方向
での機械的特性のバラツキを大幅に低減することができ
る。連続圧延のためのシートバーの接合の手段は問わな
い。連続圧延を伴うことでコイル全長にわたって潤滑圧
延を行うことができるが、この際、摩擦係数は0.20
以下とする必要がある。これについては詳細な機構は不
明であるが、種々の実験データの回帰によれば摩擦係数
を0.20以下とすることによって、材質の安定化が達
成されることが明らかとなった。さらに材質の向上をね
らうためには摩擦係数を0.15以下とすることが一層
望ましい。
Application of continuous rolling and lubrication rolling Others: Although continuous rolling and lubrication rolling are not indispensable conditions, stable hot rolling is possible and the shape of the steel sheet is also stabilized by performing them. Although the detailed mechanism is unknown, it is possible to greatly reduce the variation in mechanical properties of the steel sheet in the longitudinal direction. The means for joining the sheet bars for continuous rolling does not matter. Lubricating rolling can be performed over the entire length of the coil with continuous rolling, but at this time, the friction coefficient is 0.20.
It is necessary to: Although the detailed mechanism of this is unknown, regression of various experimental data has revealed that stabilization of the material is achieved by setting the friction coefficient to 0.20 or less. Further, in order to improve the material, it is more desirable to set the friction coefficient to 0.15 or less.

【0033】[0033]

【実施例】 〔実施例1〕次に本発明の実施例について説明する。表
1に示す成分組成を含み、残部が実質的にFeからなる
鋼を転炉で溶製し、この鋼スラブを表2に示す条件で熱
間圧延、連続焼鈍した後、冷延を行い、最終仕上げ板厚
を0.24mmとした。そして、ハロゲンタイプの電気
錫めっきラインにて25番相当の錫めっきを連続的に施
してぶりきに仕上げた。比較例として、同じ板厚に仕上
げ、ほぼ同一硬度となるように焼鈍後の2次冷延率を調
整し、従来法で製造した鋼(鋼9)に対して同様の錫め
っきを施し、以後の評価に供した。
EXAMPLES Example 1 Next, examples of the present invention will be described. Steel containing the component composition shown in Table 1 and the balance being substantially Fe was melted in a converter, and this steel slab was hot-rolled and continuously annealed under the conditions shown in Table 2, followed by cold rolling. The final finished plate thickness was 0.24 mm. Then, tin plating corresponding to No. 25 was continuously applied on a halogen type electric tin plating line to finish it in a tin plate. As a comparative example, the secondary cold rolling ratio after annealing was adjusted so that the plate thickness was the same and the hardness was almost the same, and the same tin plating was applied to the steel (steel 9) manufactured by the conventional method. Was used for evaluation.

【0034】このようにして得られた錫めっき鋼板の製
品長手方向及び幅方向の材質のばらつきについて、製品
コイルの長手方向にほぼ100mピッチ(但し、コイル
の先後端の20mは5mピッチ)で合計10点以上、幅
方向で各9点合計90点以上の引張特性の調査を行い、
平均値と標準偏差を表3に示した。本発明によれば、材
質均一性および加工性の高い缶用鋼板が製造できること
がわかる。
Regarding the variation in the material in the product longitudinal direction and the product width direction of the tin-plated steel sheet thus obtained, the total is approximately 100 m pitch in the longitudinal direction of the product coil (however, 20 m at the front and rear ends of the coil is 5 m pitch). Ten points or more, 9 points each in the width direction, a total of 90 points or more, are investigated for tensile properties,
The average value and standard deviation are shown in Table 3. According to the present invention, it can be seen that a steel plate for a can having high material uniformity and workability can be manufactured.

【0035】[0035]

【表1】 [Table 1]

【0036】[0036]

【表2】 [Table 2]

【0037】[0037]

【表3】 [Table 3]

【0038】〔実施例2〕 実施例2表1に示す鋼6にCr:0.02重量%、M
o:0.01重量%を添加した鋼を用いて、表4に示す
条件で厚み0.22mmの表面処理原板を製造し、その
後、実施例1と同様にハロゲンタイプの電気錫めっきラ
インにて12番相当の錫めっきを行い、機械的性質を調
査した。評価内容は実施例1と同様である。なお、表4
における巻取温度1〜4は各々ホットコイルの先端〜先
端20m、先端20m〜後端100m、後端100m〜
後端20m、及び後端20m〜後端部の平均温度を放射
温度計で測定したものである。
Example 2 Example 2 Steel 6 shown in Table 1 had Cr: 0.02% by weight and M
O: 0.01% by weight of steel was used to produce a surface-treated original plate having a thickness of 0.22 mm under the conditions shown in Table 4, and thereafter, in the same manner as in Example 1, in a halogen type electrotin plating line. No. 12 tin plating was performed and the mechanical properties were investigated. The evaluation contents are the same as in Example 1. Table 4
The coiling temperatures 1 to 4 are as follows: the tip of the hot coil to the tip 20 m, the tip 20 m to the trailing end 100 m, and the trailing end 100 m.
The average temperature of the rear end 20 m and the rear end 20 m to the rear end is measured by a radiation thermometer.

【0039】[0039]

【表4】 [Table 4]

【0040】[0040]

【表5】 [Table 5]

【0041】〔実施例3〕表1の鋼8を用いて、表6に
示す条件で厚み0.15〜0.18mmの冷延鋼板を製
造し、同様にコイルの長さ方向と幅方向に合計100点
以上のサンプルを採取し、引張特性を調査した。また、
同材を用いて、絞り比1.92の円筒成形試験を行い、
成形性を評価した。これより明らかに、本発明法によれ
ばコイル内の降伏強さ(YS)のばらつきは1.0kgf/
mm2 以下と小さく、成形結果もしわの発生もなく良好で
あった。
Example 3 Using Steel 8 in Table 1, cold-rolled steel sheets having a thickness of 0.15 to 0.18 mm were manufactured under the conditions shown in Table 6, and similarly in the length direction and width direction of the coil. A total of 100 or more samples were collected and the tensile properties were investigated. Also,
Using the same material, a cylindrical forming test with a drawing ratio of 1.92 was performed,
The moldability was evaluated. Clearly, according to the method of the present invention, the variation of the yield strength (YS) in the coil is 1.0 kgf /
It was as small as mm 2 or less, and the molding result was good with no wrinkles.

【0042】[0042]

【表6】 [Table 6]

【0043】[0043]

【表7】 [Table 7]

【0044】[0044]

【発明の効果】本発明は、以上述べたように構成されて
いるので、本発明鋼を原板として使用した容器用鋼板
は、場合によっては特別な表面処理を行わない場合で
も、容器として成形・加工して使用する場合に、より高
い平均r値、良好な(小さな)面内異方性を有している
ので、従来鋼を使用した場合に比して各種プレス成形時
の成形可能範囲が広く、プレス加工の不具合を生ずる危
険性が小さい。鋼板のプレス成形性は鋼板厚みが薄くな
るとそれだけで劣化する傾向があるため、良好なプレス
成形性を有する本発明鋼を用いることでこの板厚減少に
伴う成形性の劣化を補償できる。従って、鋼板を薄肉化
するという合理化を達成することができる。また、鋼板
の材質均一性に優れているため、製缶ラインの連続化、
自動化、高速化などの傾向に適応する材料である。
EFFECTS OF THE INVENTION Since the present invention is constructed as described above, a steel sheet for containers using the steel of the present invention as a base plate can be formed into a container even if no special surface treatment is performed. When processed and used, it has a higher average r value and good (small) in-plane anisotropy, so the formable range during various press forming is higher than when using conventional steel. It is wide and the risk of causing press work problems is small. The press formability of the steel sheet tends to deteriorate only when the thickness of the steel sheet becomes thin. Therefore, by using the steel of the present invention having good press formability, the deterioration of the formability due to the reduction of the plate thickness can be compensated. Therefore, rationalization of thinning the steel plate can be achieved. In addition, since the steel sheet is excellent in material uniformity, the can manufacturing line is continuous,
It is a material that adapts to trends such as automation and speeding up.

【0045】2ピース缶において特にその特徴が発揮さ
れるが、3ピース缶用途でも円筒成形の安定化などを通
じて本材料の特徴を発揮することができる。
The characteristics are particularly exhibited in the two-piece can, but the characteristics of the present material can also be exhibited in the three-piece can application by stabilizing the cylindrical molding.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 荒谷 昌利 千葉市中央区川崎町1番地 川崎製鉄株式 会社技術研究所内 (72)発明者 久々湊 英雄 千葉市中央区川崎町1番地 川崎製鉄株式 会社千葉製鉄所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masatoshi Aratani 1 Kawasaki-cho, Chuo-ku, Chiba City, Research Institute of Kawasaki Steel Co., Ltd. (72) Inventor Hideo Kuminato 1 Kawasaki-machi, Chuo-ku, Chiba In-house

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 C:0.015重量%以下 Si:0.2重量%以下 Mn:0.6重量%以下 P:0.02重量%以下 S:0.02重量%以下 Al:0.15重量%以下 N:0.02重量%以下 を含有し、残部Fe及び不可避的不純物から成る鋼を、
(Ar3 −30℃)以上の温度で熱間仕上圧延を終了
し、厚みを2.6mm以下とし、平均巻取温度640〜
750℃で、かつ、長手方向各部の巻取温度を、 先端0m〜先端20m:680〜750℃ 先端20m〜後端100m:640〜700℃ 後端100m〜後端20m:680〜730℃ 後端20m〜後端0m:710〜750℃ として巻取り、この熱延母板を冷間圧延、連続焼鈍を経
て圧下率30%以下の2次冷間圧延することを特徴とす
る材質均一性に優れた良絞り成形性缶用鋼板の製造方
法。
1. C: 0.015 wt% or less Si: 0.2 wt% or less Mn: 0.6 wt% or less P: 0.02 wt% or less S: 0.02 wt% or less Al: 0.15 A steel containing N: 0.02 wt% or less and the balance Fe and unavoidable impurities,
The hot finish rolling is completed at a temperature of (Ar 3 -30 ° C) or higher, the thickness is reduced to 2.6 mm or less, and the average coiling temperature is 640 to 640.
At 750 ° C., the winding temperature of each part in the longitudinal direction is as follows: Tip 0 m to tip 20 m: 680 to 750 ° C. Tip 20 m to trailing end 100 m: 640 to 700 ° C. Trailing end 100 m to trailing end 20 m: 680 to 730 ° C. Trailing end 20 m-rear end 0 m: wound at 710-750 ° C., cold-rolled, continuously annealed, and then secondary cold-rolled at a reduction rate of 30% or less, excellent in material uniformity. Good drawing method of steel sheet for cans.
【請求項2】 さらに選択的添加元素として A群 Nb:0.003〜0.015重量% Ti:0.003〜0.015重量% のうち1種又は2種以上 B群 Cu:0.5重量%以下 Ni:0.5重量%以下 Cr:0.5重量%以下 Mo:0.2重量%以下 のうち1種又は2種以上から選ばれたA群又はB群の何
れか一方又は双方を含有することを特徴とする請求項1
記載の材質均一性に優れた良絞り成形性缶用鋼板の製造
方法。
2. One or more of Group A Nb: 0.003 to 0.015 wt% Ti: 0.003 to 0.015 wt% as a selective additive element, Group B Cu: 0.5 % By weight or less Ni: 0.5% by weight or less Cr: 0.5% by weight or less Mo: 0.2% by weight or less Either one or both of group A or group B selected from one or more of 1. The composition according to claim 1, wherein
A method for producing a steel sheet for a can having good drawability, which is excellent in material uniformity as described.
JP33709895A 1995-12-25 1995-12-25 Production of steel for good drawable can excellent in material uniformity Pending JPH09176744A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP33709895A JPH09176744A (en) 1995-12-25 1995-12-25 Production of steel for good drawable can excellent in material uniformity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP33709895A JPH09176744A (en) 1995-12-25 1995-12-25 Production of steel for good drawable can excellent in material uniformity

Publications (1)

Publication Number Publication Date
JPH09176744A true JPH09176744A (en) 1997-07-08

Family

ID=18305424

Family Applications (1)

Application Number Title Priority Date Filing Date
JP33709895A Pending JPH09176744A (en) 1995-12-25 1995-12-25 Production of steel for good drawable can excellent in material uniformity

Country Status (1)

Country Link
JP (1) JPH09176744A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6171416B1 (en) 1998-11-25 2001-01-09 Kawasaki Steel Corporation Method of producing can steel strip
JP2005264205A (en) * 2004-03-17 2005-09-29 Jfe Steel Kk Steel sheet for nitriding treatment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6171416B1 (en) 1998-11-25 2001-01-09 Kawasaki Steel Corporation Method of producing can steel strip
JP2005264205A (en) * 2004-03-17 2005-09-29 Jfe Steel Kk Steel sheet for nitriding treatment
JP4561136B2 (en) * 2004-03-17 2010-10-13 Jfeスチール株式会社 Steel sheet for nitriding treatment

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