JP3422852B2 - Manufacturing method of steel sheet for cans - Google Patents
Manufacturing method of steel sheet for cansInfo
- Publication number
- JP3422852B2 JP3422852B2 JP22026594A JP22026594A JP3422852B2 JP 3422852 B2 JP3422852 B2 JP 3422852B2 JP 22026594 A JP22026594 A JP 22026594A JP 22026594 A JP22026594 A JP 22026594A JP 3422852 B2 JP3422852 B2 JP 3422852B2
- Authority
- JP
- Japan
- Prior art keywords
- less
- manufacturing
- rolled
- cans
- hot
- 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 - Fee Related
Links
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- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、加工組織を有するにも
かかわらず、優れたネック加工性及びフランジ加工性を
示す容器用鋼板の製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a steel sheet for containers which has excellent neck workability and flange workability despite having a work structure.
【０００２】[0002]
【従来の技術】容器用原板はＤＩ（Drawing ＆ Ironin
g）缶に代表される２ピース缶、溶接缶、接着缶などの
３ピース缶、それに缶蓋などに使われる。最近は缶の軽
量化の促進に従い、原板の薄手化が進められている。し
かし、従来のように冷延後、焼鈍を行い１％から８％程
度のスキンパスをして容器強原板を製造しようとする
と、焼鈍時の板厚が薄くなり過ぎ、連続焼鈍をしょうと
すると通板性が悪く、途中で破断したり、形状が変化し
たりする問題がある。そのため、焼鈍時の板厚を比較的
厚く保ち、焼鈍後に２０％から５０％の圧延を行うＤＲ
（Duble Reduce）法による容器用原板の製造方法が特公
平１−５２４５１号公報に開示されている。2. Description of the Related Art Container original plates are DI (Drawing & Ironin)
g) Used for 2-piece cans such as cans, 3-piece cans such as welding cans, adhesive cans, and can lids. Recently, as the weight of cans has been reduced, the thickness of the original plate has been reduced. However, after cold rolling as in the past, when annealing is performed and a skin strength pass of about 1% to 8% is used to manufacture a plate for container strength, the plate thickness during annealing becomes too thin, and continuous annealing is not recommended. The plate properties are poor, and there are problems that the plate breaks or the shape changes during the process. Therefore, DR that keeps the plate thickness relatively large during annealing and performs 20% to 50% rolling after annealing
A method for manufacturing a container original plate by the (Duble Reduce) method is disclosed in Japanese Patent Publication No. 1-52451.
【０００３】しかし、この方法では焼鈍することを前提
にしているので、製造コスト的には大幅なコストダウン
は達成できない。そこで、より低廉化な容器用原板の製
造方法として冷延後の焼鈍を省略した技術が開発され、
その製造方法が特公昭５４−１２４４号公報に開示され
ている。当時の容器用鋼板は比較的厚く、加工度も低か
った関係で、フランジ割れの起こる頻度は小さかった。
しかし、近年の鋼板の薄手化に伴い、冷延まま材を用い
て容器を成形するとフランジ加工部で割れが発生した
り、ネック加工時にしわが生じたりする頻度が著しく高
くなった。However, since this method is premised on annealing, a significant cost reduction cannot be achieved in terms of manufacturing cost. Therefore, as a more inexpensive manufacturing method for original plates for containers, a technology was developed in which annealing after cold rolling was omitted.
The manufacturing method thereof is disclosed in Japanese Patent Publication No. 54-1244. Since the steel sheets for containers at that time were relatively thick and the workability was low, the frequency of flange cracks was low.
However, with the recent thinning of steel sheets, when a container is formed by using a cold-rolled material, the frequency of occurrence of cracks in the flange processing portion and wrinkles during neck processing has become extremely high.
【０００４】[0004]
【発明が解決しようとする課題】本発明は製造コストの
低い冷延まま材を用いて容器を成形する際、ネック加工
時にしわの発生が、そしてフランジ加工において割れが
極力発生しない鋼板を提供することを目的とする。DISCLOSURE OF THE INVENTION The present invention provides a steel sheet which, when a container is formed from a cold-rolled material which is low in manufacturing cost, forms wrinkles during neck processing and cracks during flange processing as little as possible. The purpose is to
【０００５】[0005]
【課題を解決するための手段】すなわち、本発明の要旨
とするところは、重量％でＣ ：０．００１％以上、
０．０１％以下、Ｎ ：０．００８％以下、Ｍｎ：０．
１５％以上、１．５％以下、Ｎｂ，Ｔｉ，Ｚｒの１種あ
るいは２種以上で合計の添加量が０．０１％以上、０．
１％以下、必要に応じＢ：０．０００３％以上、０．０
０５０％以下を含み、残部Ｆｅ及び不可避的不純物から
なる鋼をＡｒ3 変態点以上で熱延し、平均冷速５０℃／
秒以上（Ｂを添加した場合３０℃／秒以上）、３００℃
／秒以下で７００℃以下まで冷却し、酸洗後、６０％以
上、９５％以下の冷延を行って、板厚を０．０５mm以
上、０．２５mm以下とし、その後、焼鈍を行わないこと
を特徴とする容器用原板の製造方法にある。That is, the gist of the present invention is that C in weight%: 0.001% or more,
0.01% or less, N: 0.008% or less, Mn: 0.
15% or more and 1.5% or less, and one or two or more of Nb, Ti, and Zr, and the total addition amount is 0.01% or more and 0.
1% or less, if necessary B: 0.0003% or more, 0.0
Steel containing 050% or less and the balance of Fe and unavoidable impurities is hot-rolled at an Ar 3 transformation point or higher to obtain an average cooling rate of 50 ° C. /
Second or more (30 ° C / second or more when B is added), 300 ° C
After cooling to 700 ° C or less per second or less and pickling, cold rolling 60% or more and 95% or less to reduce the plate thickness to 0.05 mm or more and 0.25 mm or less, and then do not perform annealing. And a method for producing a container original plate.
【０００６】以下に、本発明を詳細に説明する。本発明
らは様々な熱延鋼板を５０％以上冷延し、冷延まま材を
用いて容器を製造し、ネック加工時のしわの発生、フラ
ンジ加工性などを検討した。その結果、容器原板として
今後使用されると考えられる板厚範囲で、ある冷延率以
上の加工をうけた材料の成形特性が成分と熱延板の組織
に大きく依存することを見い出した。成分は熱延組織の
形成に影響を与えると共に冷延時の加工硬化特性にも影
響を与える。The present invention will be described in detail below. The present inventors cold-rolled various hot-rolled steel sheets by 50% or more, manufactured a container using the material as cold-rolled, and examined wrinkles during neck processing, flange workability, and the like. As a result, they found that the forming characteristics of the material processed by a certain cold rolling rate or more greatly depended on the components and the structure of the hot-rolled sheet in the range of sheet thickness considered to be used as a container original sheet in the future. The components affect the formation of the hot rolled structure and also the work hardening characteristics during cold rolling.
【０００７】本発明の製造基本思想は極低炭素化および
高純化により、素材の軟質化および加工硬化能の低下を
図り、熱延組織のフェライト粒を微細化し、又はアシキ
ュラー化（ウイッドマンステッテン組織）することによ
り冷延後の鋼板のフランジ加工性を向上させようとする
ものである。The basic manufacturing concept of the present invention is to make the material soft and reduce the work hardening ability by ultra-low carbonization and high purification, to miniaturize the ferrite grains of the hot rolled structure, or to make acicular (Widmanstatten). Structure) to improve the flange formability of the steel sheet after cold rolling.
【０００８】これらの知見に基づき本発明の限定理由を
述べる。Ｃ量の下限添加量を０．００１％としたのは、
これ以下のＣ量では熱延板を微細組織にするのが難しい
ためである。また、上限を０．０１％としたのは、これ
以上の添加では冷延時の加工硬化が大きくなり、製缶時
にネックしわの抑制が難しくなるためである。The reasons for limiting the present invention will be described based on these findings. The lower limit of the amount of C added is 0.001%
This is because it is difficult to make the hot-rolled sheet into a fine structure with a C content of less than this. The upper limit is set to 0.01% because if it is added more than this, work hardening during cold rolling becomes large, and it becomes difficult to suppress neck wrinkles during can making.
【０００９】Ｎ量の下限を０．００８％としたのは、こ
れ以上の添加は加工性を劣化するためである。Ｍｎ量の
下限添加量を０．１５％としたのは、これ以下のＭｎ量
では熱延板を微細組織にするのが難しいためである。ま
た、上限を１．５％としたのは、これ以上の添加では冷
延時の加工硬化が大きくなり、製缶時にネックしわの抑
制が難しくなるためである。The lower limit of the N content is set to 0.008% because the addition of more than this deteriorates the workability. The lower limit of the amount of Mn added is 0.15% because it is difficult to make the hot-rolled sheet into a fine structure if the amount of Mn is less than this. Further, the upper limit is set to 1.5% because if it is added more than this, work hardening during cold rolling becomes large, and it becomes difficult to suppress neck wrinkles during can making.
【００１０】Ｎｂ，Ｔｉ，Ｚｒの添加は微細組織あるい
はアシキュラー組織の熱延板を作るのに効果があるため
で、その効果が現れる下限添加量はこれらの元素の単独
あるいは２種以上の合計が０．０１％以上である。また
上限を０．１％としたのはこれ以上の添加で効果が飽和
する傾向があり、いたずらに合金コストの増加を招くた
めである。This is because the addition of Nb, Ti, and Zr is effective in producing a hot-rolled sheet having a fine structure or an acicular structure, and the lower limit addition amount at which the effect is exerted is a single addition of these elements or a total of two or more kinds thereof. It is 0.01% or more. Further, the upper limit is set to 0.1% because the effect tends to be saturated with the addition of more than this and the alloy cost is unnecessarily increased.
【００１１】Ｂの添加はフェライト組織のアシキュラー
化を促進させ、その効果が顕在化する添加量は０．００
０３％以上である。しかし、０．００５％を超えると効
果が飽和する。そのため０．０００３％以上０．００５
％以下とした。Ｂの添加はアシキュラー化を促進するの
で、冷速の限定条件を緩和することができる。The addition of B promotes the acicularization of the ferrite structure, and the effect is manifested in an addition amount of 0.00.
It is at least 03%. However, if it exceeds 0.005%, the effect is saturated. Therefore 0.0003% or more 0.005
% Or less. Since the addition of B promotes acicularization, the limiting condition of the cooling rate can be relaxed.
【００１２】次に、製造プロセスの限定理由について述
べる。熱延の仕上げ温度をＡｒ3 変態点以上としたの
は、フェライト組織の微細化ならびにアシキュラー化は
変態を利用して行うものなので、熱延はγ域で終了する
必要があるためである。冷速の限定条件は、冷速を増す
ことにより、フェライト組織は微細化あるいはアシキュ
ラー化が進み、その効果が顕在する冷速がＢ添加材で３
０℃／秒以上、無添加材で５０℃／秒以上であるため、
これらを下限とした。また、上限を３００℃／秒とした
のは、これ以上の冷速で冷却すると硬化が進み、素材の
軟質化および加工硬化能の低下が達成できないためであ
る。Next, the reasons for limiting the manufacturing process will be described. The finishing temperature of hot rolling is set to the Ar 3 transformation point or higher because the refinement of the ferrite structure and the acicularization are performed by utilizing the transformation, and therefore the hot rolling needs to be finished in the γ region. The limiting condition for the cooling rate is that the B content is 3% when the cooling rate is increased by increasing the cooling rate and the ferrite structure becomes finer or more acicular.
0 ° C / sec or more, 50 ° C / sec or more with no additive,
These were the lower limits. Further, the upper limit is set to 300 ° C./second because if the material is cooled at a cooling rate higher than this, hardening proceeds, and softening of the material and deterioration of work hardening ability cannot be achieved.
【００１３】冷延率を６０％以上、９５％以下と限定し
たのは、今後容器用原板として使用されると考えられる
板厚範囲である０．０５mmから０．２５mmの冷延鋼板を
製造するにあたって、熱延で製造可能な板厚および実現
可能な冷延率ならびに缶強度から決定したものである。The cold rolling rate is limited to 60% or more and 95% or less to produce a cold rolled steel sheet having a thickness range of 0.05 mm to 0.25 mm which is considered to be used as a raw material for containers in the future. At this time, it was determined from the plate thickness that can be manufactured by hot rolling, the achievable cold rolling ratio, and the can strength.
【００１４】[0014]
【実施例】表１に本発明鋼と比較鋼の化学成分を示す。
これらの鋼は転炉精練を行った溶鋼の連続鋳造材であ
る。表２はこれらの鋼種を用いて容器用原板を製造した
時の製造条件とそれを用いて製缶したときの加工性を示
す。容器製造における加工性の評価はＤＩ（Drawing ＆
Ironing）缶と溶接缶のネック加工性とその後のフラン
ジ加工性で整理した。定量的評価として１００から１０
０００の缶を製造し、その際の不良缶発生率を％で示し
た。錫めっき量はＤＩ缶では１平方メーター当たり２．
８ｇ、溶接缶では１平方メーター当たり１ｇである。ネ
ック加工はスピンネッカーを用いて行った。また、フラ
ンジ加工にはスピンフランジャーを用いた。EXAMPLES Table 1 shows the chemical composition of the steel of the present invention and the comparative steel.
These steels are continuous casting materials of molten steel that have been subjected to converter refining. Table 2 shows the manufacturing conditions when a container original plate was manufactured using these steel types and the workability when a can was manufactured using the same. DI (Drawing &
Ironing) Cans and welded cans are arranged according to neck processability and subsequent flange processability. 100 to 10 for quantitative evaluation
000 cans were manufactured, and the occurrence rate of defective cans was shown in%. The tin plating amount is 2. per square meter for DI cans.
8 g, 1 g per square meter for a welding can. Neck processing was performed using a spin necker. A spin flanger was used for flange processing.
【００１５】本発明の範囲内である実験番号１，２，
３，６，７，８，９，１０，１１はネック加工性ならび
にフランジ加工性共に良好である。ここで、実験番号２
の不良缶率が高くなっているが、これは板厚が薄いため
で、同じ板厚の比較例である実験番号１４と比較すれ
ば、本発明鋼が優れた製缶成形性を持っていることが分
かる。Experiment numbers 1, 2, within the scope of the invention
Nos. 3, 6, 7, 8, 9, 10, and 11 have good neck workability and flange workability. Here, experiment number 2
The defective can rate is high because the plate thickness is thin. Compared with Experiment No. 14 which is a comparative example having the same plate thickness, the steel of the present invention has excellent can forming property. I understand.
【００１６】一方、平均冷速が本発明の範囲外である実
験番号４では熱延板の組織が粗粒であったためかフラン
ジ割れが起こる頻度が高かった。仕上温度がＡｒ3 変態
点以下であった実験番号５では熱延板の組織が不均一で
あったためか、成形性が悪かった。鋼の成分が本発明の
範囲外の実験番号１２から１６では成形性の劣化が顕著
に見られる。On the other hand, in Experiment No. 4 in which the average cold speed was out of the range of the present invention, the flange cracking occurred frequently because the structure of the hot-rolled sheet was coarse grains. In Experiment No. 5 in which the finishing temperature was below the Ar 3 transformation point, the formability was poor, probably because the structure of the hot-rolled sheet was not uniform. In Experiment Nos. 12 to 16 in which the composition of the steel is out of the range of the present invention, the deterioration of the formability is noticeable.
【００１７】[0017]
【表１】 [Table 1]
【００１８】[0018]
【表２】 [Table 2]
【００１９】[0019]
【発明の効果】本発明により、容器用原板の製造におい
て焼鈍工程を省略でき、かつ缶材のさらなる薄手化が可
能になり省エネルギー、省資源にむすびつき、工業的意
味は大きい。According to the present invention, the annealing step can be omitted in the production of the original plate for a container, and the can material can be further thinned, which leads to energy saving and resource saving, and has great industrial significance.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−280926（ＪＰ，Ａ) 特開 平６−248338（ＪＰ，Ａ) 特開 平６−248339（ＪＰ，Ａ) 特開 平８−41548（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C21D 9/46 - 9/48 C21D 8/00 - 8/04 C22C 38/00 - 38/60 ─────────────────────────────────────────────────── --- Continuation of the front page (56) Reference JP-A-4-280926 (JP, A) JP-A-6-248338 (JP, A) JP-A-6-248339 (JP, A) JP-A-8- 41548 (JP, A) (58) Fields surveyed (Int.Cl. 7 , DB name) C21D 9/46-9/48 C21D 8/00-8/04 C22C 38/00-38/60
Claims (2)
量が０．０１％以上、０．１％以下を含み、残部Ｆｅ及
び不可避的不純物からなる鋼をＡｒ3 変態点以上で熱延
し、平均冷速５０℃／秒以上、３００℃／秒以下で７０
０℃以下まで冷却し、酸洗後、６０％以上、９５％以下
の冷延を行って、板厚を０．０５mm以上、０．２５mm以
下とし、その後、焼鈍を行わないことを特徴とする缶用
鋼板の製造方法。1. By weight% C: 0.001% or more, 0.01% or less, N: 0.008% or less, Mn: 0.15% or more, 1.5% or less, Nb, Ti, Zr One or two or more kinds of steel containing a total addition amount of 0.01% or more and 0.1% or less and the balance Fe and unavoidable impurities are hot-rolled at an Ar 3 transformation point or more, and an average cold speed of 50 70 ° C / sec or more and 300 ° C / sec or less
It is characterized in that it is cooled to 0 ° C. or lower, pickled, and then cold rolled at 60% or more and 95% or less to make the plate thickness 0.05 mm or more and 0.25 mm or less, and thereafter, not annealing. Manufacturing method of steel plate for can.
量が０．０１％以上、０．１％以下を含み、残部Ｆｅ及
び不可避的不純物からなる鋼をＡｒ3 変態点以上で熱延
し、平均冷速３０℃／秒以上、３００℃／秒以下で７０
０℃以下まで冷却し、酸洗後、６０％以上、９５％以下
の冷延を行って、板厚を０．０５mm以上、０．２５mm以
下とし、その後、焼鈍を行わないことを特徴とする缶用
鋼板の製造方法。2. C: 0.001% or more and 0.01% or less, N: 0.008% or less, Mn: 0.15% or more, 1.5% or less, and B: 0.0003% by weight. As described above, a steel containing 0.0050% or less, one or two or more of Nb, Ti, and Zr with a total addition amount of 0.01% or more and 0.1% or less and the balance Fe and unavoidable impurities is used. Hot rolled at an Ar 3 transformation point or higher, and an average cooling rate of 30 ° C./sec or more and 300 ° C./sec or less, 70
It is characterized in that it is cooled to 0 ° C. or lower, pickled, and then cold rolled at 60% or more and 95% or less to make the plate thickness 0.05 mm or more and 0.25 mm or less, and thereafter, not annealing. Manufacturing method of steel plate for can.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22026594A JP3422852B2 (en) | 1994-09-14 | 1994-09-14 | Manufacturing method of steel sheet for cans |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22026594A JP3422852B2 (en) | 1994-09-14 | 1994-09-14 | Manufacturing method of steel sheet for cans |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0881715A JPH0881715A (en) | 1996-03-26 |
| JP3422852B2 true JP3422852B2 (en) | 2003-06-30 |
Family
ID=16748479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22026594A Expired - Fee Related JP3422852B2 (en) | 1994-09-14 | 1994-09-14 | Manufacturing method of steel sheet for cans |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3422852B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5262242B2 (en) * | 2008-03-31 | 2013-08-14 | Ｊｆｅスチール株式会社 | Manufacturing method of steel plate for can manufacturing |
| JP5463677B2 (en) * | 2009-02-03 | 2014-04-09 | Ｊｆｅスチール株式会社 | DR steel sheet for high workability 3-piece can and manufacturing method thereof |
| KR20210079460A (en) * | 2019-12-19 | 2021-06-30 | 주식회사 포스코 | Cold-rolled steel sheet having high hardness and formability and manufacturing method thereof |
-
1994
- 1994-09-14 JP JP22026594A patent/JP3422852B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0881715A (en) | 1996-03-26 |
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