JPS6056052A - Steel sheet for easy-to-open can having excellent opening property and production thereof - Google Patents
Steel sheet for easy-to-open can having excellent opening property and production thereofInfo
- Publication number
- JPS6056052A JPS6056052A JP16188283A JP16188283A JPS6056052A JP S6056052 A JPS6056052 A JP S6056052A JP 16188283 A JP16188283 A JP 16188283A JP 16188283 A JP16188283 A JP 16188283A JP S6056052 A JPS6056052 A JP S6056052A
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- less
- easy
- hardness
- open
- rolling
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Abstract
Description
【発明の詳細な説明】
本発明は、イージーオープン缶用材料として優れた開缶
性を有する鋼板及びその製造方法に関する０
最近、ビール缶、炭酸飲料缶、果汁飲料缶、ｌライパッ
ク缶の蓋を、缶切りや栓抜き等の道具を使用せずに開け
ることができるイージーオープン缶゛が一般に使用され
ている。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a steel sheet having excellent can-opening properties as a material for easy-open cans, and a method for producing the same. Easy-open cans, which can be opened without the use of tools such as can openers and bottle openers, are commonly used.
イージーオープン缶用材料としては、耐食性の点で問題
となる内容物用の場合を除き、その開り易さのために主
としてアルミニウム合金が用いられている。Aluminum alloys are mainly used as materials for easy-open cans because of their ease of opening, except for cases where the contents pose a problem in terms of corrosion resistance.
しかし、内容物に食塩を含むか或いは電解質の内容物の
場合には、アルミニウム合金の一部使用にあっては、ガ
ルバニック電池を形成しくアルミニウム素地の露出部が
陽極、ブリキ缶胴のピンホール部が陰極）、電気化学的
腐食が促進され、短時間のうちにアルミエンドの穴あき
の発生に至る。However, if the content contains salt or electrolyte, and some aluminum alloys are used, a galvanic cell is formed, with the exposed part of the aluminum base serving as the anode and the pinhole part of the tin can body. (the cathode), electrochemical corrosion is accelerated, leading to pitting of the aluminum end in a short period of time.
このような問題を防止する方法として次の［Ｆ］〜■等
の方法が考えられる。As methods for preventing such problems, the following methods [F] to (2) can be considered.
■ 塩分を含む内容物或いは電解質の内容物に対しては
、ブリキ缶とアルミエンドの組み合わせ使用を避ける。■ Avoid using tin cans and aluminum end combinations for salty or electrolyte contents.
■ 上記■のような内容物の場合には、全面アルミニウ
ム缶とする。■ If the contents are as in (■) above, use an all-aluminum can.
■ 上記■のような内容物の場合であっても、ブリキ缶
胴又はアルミエンドのいずれか一方に完全なる塗装被膜
を緯し、ガルバニック電池の形成を防ぐ。(2) Even in the case of contents such as (2) above, a complete coating is applied to either the tin can body or the aluminum end to prevent the formation of galvanic cells.
しかし乍ら、■の方法はアルミニウムが高価であり、ま
た■の方法はアルミニウム素地のリベット部及びスコア
部での露出を完全に防ぐことが困難である等の欠点があ
る。However, method (2) has drawbacks such as the fact that aluminum is expensive, and method (2) it is difficult to completely prevent the aluminum substrate from being exposed at the rivet and score portions.
そのため、ブリキをイージーオープン用素材として使用
する努力が続けられているのが現状であるが、ブリキは
、アルミニウム合金に比らべ、一般に抗張力が高く、開
缶性が悪いとされている。For this reason, efforts are currently being made to use tinplate as an easy-opening material, but tinplate generally has higher tensile strength and is said to have poorer opening performance than aluminum alloys.
そこで、開缶性に優れたイージーオープン用鋼板の製造
を目的とする技術が幾つか提案されてはいるＯ
例えば、特公昭５１−５８８８号に開示された技術があ
る。ごｔは、同公報の実施例によると、箱焼鈍又はオー
ブン焼鈍を施したａ ： ０．００５〜０．０１６ ％
、 酸素 ？ ０．０１４〜０．０２６ ＊ 、Ｓｉ
： Ｏ，Ｏａ係係上下Ｍｎ′： ０．２５〜０．８８
１で、残部がＦｅの他は不可避的に含まれる不純物のみ
からなる鋼、若しくは更に圧下率８〜１５％のスキンパ
ス圧延を施したイージーオープン缶用鋼板である。Therefore, several techniques have been proposed for the purpose of manufacturing easy-open steel plates with excellent can opening properties. For example, there is a technique disclosed in Japanese Patent Publication No. 51-5888. According to the examples in the same publication, a of box annealing or oven annealing: 0.005 to 0.016%
, oxygen ? 0.014-0.026*, Si
: O, Oa upper and lower Mn': 0.25 to 0.88
1, the remainder being Fe and only unavoidable impurities, or a steel plate for easy-open cans further subjected to skin pass rolling at a rolling reduction of 8 to 15%.
また、特開昭５５−９７４２８号には、Ｃ：０．００８
〜０．０１２４、Ｓｉ ： ０．０１〜０．０２ ％
、Ｍｎ ：０．２８〜旧８１％、酸素ｊ Ｏ，００９〜
０．０１４％、Ａ！：０、００８〜０．０４５係 １／
、０＋酸素： ０．０１５〜０．０１８係の鋼を連続焼
鈍し、しかるのち圧下率６〜２０嗟でスキンバス圧延し
た鋼板がイージーオープン缶用に適しているとして開示
されている。Also, in Japanese Patent Application Laid-open No. 55-97428, C: 0.008
~0.0124, Si: 0.01~0.02%
, Mn: 0.28~81%, oxygen j O,009~
0.014%, A! :0,008~0.045 section 1/
, 0+Oxygen: 0.015 to 0.018 steel is continuously annealed and then skin bath rolled at a rolling reduction of 6 to 20 degrees, and a steel plate is disclosed as being suitable for easy-open cans.
これらの鋼は、各公報の詳細な説明の欄に示されている
如き成る程度の開缶性改善効果が認められるものの、ブ
リキに対する最近の薄く、かつ、硬質化の要請には全く
のところ対処しきれない欠点がある。即ち、軟質のイー
ジーオープン缶用鋼板として用いる場合には問題が少な
いけれども、特に調質度７４以上の硬質イージーオープ
ン缶用素材をこのような鋼板で製造するときに問題が生
じるのである。それは、硬質ブリキは本来加工硬化が大
きいうえに、スコア加工部が非常に強度の加工を受け、
かつ、塗装後の焼付時に歪時効硬化が起こるので、素材
の硬度が十分低くても、スコア加工部の抗張力が局部的
に非常に高くなってしまうためである〇
そこで、本発明者等は、前記要請に応え得るイージーオ
ープン缶用鋼板の開発に鋭意努めた結果、既述の歪時効
硬化が開缶性を悪くする最大の原因であることを究明し
、この点を改善することによって開缶力を格段に小さく
することに成功したものである。Although these steels have the effect of improving can openability to some degree as shown in the detailed explanation column of each publication, they do not meet the recent demands for thinner and harder tinplates at all. There are drawbacks that cannot be overcome. That is, although there are few problems when used as a soft steel sheet for easy-open cans, problems arise particularly when manufacturing hard easy-open can materials with a heat treatment degree of 74 or higher using such steel sheets. This is because hard tinplate is inherently highly work hardened, and the score processing area is subjected to extremely strong processing.
In addition, strain age hardening occurs during baking after painting, so even if the hardness of the material is sufficiently low, the tensile strength of the scored part becomes locally extremely high.Therefore, the inventors of the present invention As a result of our efforts to develop steel sheets for easy-to-open cans that can meet the above requirements, we discovered that the strain age hardening described above is the biggest cause of poor can-opening performance. This succeeded in significantly reducing the force.
つまり、一般に開缶力は、（ｌｌｉｌ板の抗張力、（２
）伸び、及び（３）スコア残厚等と強い相関があること
は知られている。即ち、開缶力を小さくするためには、
まず第一に鋼板の抗張力を小さくする必要がある。この
場合特に問題となるのはスコア加工部の抗張力である。In other words, in general, the can opening force is (tensile strength of the llil plate, (2
) It is known that there is a strong correlation with elongation, and (3) score residual thickness. That is, in order to reduce the can opening force,
First of all, it is necessary to reduce the tensile strength of the steel plate. In this case, a particular problem is the tensile strength of the scored portion.
しかし、従来は、鋼板の硬度については十分な管理が行
われていたものの、スコア加工部の強度並びにその部分
の伸びと鋼板の硬度との関係については全く検討されて
いなかった。However, although the hardness of the steel plate has been adequately controlled in the past, no consideration has been given to the strength of the score-processed portion or the relationship between the elongation of that portion and the hardness of the steel plate.
本発明者等は、種々の実験を行った結果、スコア加工部
の強度を増大させないためには固溶０１Ｎｉｌを十分低
い範囲に制暉することが最も重要であるとの知見を得た
のである。また、スコア残厚を低くするためには適当量
のＡＪを添加し、かつ、酸素を十分低くすることも重要
であるとの知見も得たのである。As a result of various experiments, the inventors of the present invention have found that it is most important to suppress the solid solution 01Nil to a sufficiently low range in order not to increase the strength of the score processed part. . They also found that in order to reduce the score residual thickness, it is important to add an appropriate amount of AJ and to lower the oxygen content sufficiently.
本発明は、これらの知見に基づいて完成したも１のであ
って、各発明の要旨とするところは、各々、（１）重ｉ
ｔｓで０ ： ０．００８５ ％以下、）（ｎ ＋ ０
．０５〜０．４０％、Ａｌ ｔ ０．０１０〜０．１０
０チ、酸素＋０．００５係以下であって残部がＦｅ及び
不可避的不純物からなり、硬度（ＨＲｉｌｌ ＯＴ ）
が５８以上を有することを特徴とする開缶性に優れたイ
ージーオープン缶用鋼板、
（２）重量％でＯ： ０．００８５１以下、Ｉｎ ＋
０．０５〜０．４０ ４−５ 、ＡＪ ： ０．０１０
〜０．１００ １暖； 、 ＠ 素 ！ ０．００５
係以下であって、更にＮｂ及びＴｉのうちの１種又は２
種を合計で０．０５ ％以下含有し、残部がＦｅ及び不
可避的不純物からなり、硬度（ＨＲ８０Ｔ）が５８以上
を有することを特徴とする開缶性に優れたイージーオー
プン缶用鋼板、（８）重量係でＯ： ０．００８５１以
下、Ｉｎ ｓ ０．０５〜０．４０係、ｉｌｌ ０．０
１０〜ｏ、ｉｏｏ ４、酸素： ０．００５係以下であ
って残部がＴｅｌ及び不可避的不純物からなる鋼を、熱
間圧延及び冷間圧延を経た後、再結晶焼鈍により焼鈍ま
−の硬度（ＨＲ８０Ｔ ）が５４以下のものにし、しか
るのち圧下率５嗟以上の調質圧延を施してメッキ後の硬
度を５８以上のものにすることを特徴とする開缶性に優
れたイージーオープン缶用鋼板の製造方法、（４） 重
量係でＯ： ０．００３５９６以下、Ｉｎ ＋ ０．０
５〜’０．４０ ％、ムｌ＋ ０．０１０〜０．１００
％、酸素： ｏ、ｏｏｉ憾以下であって、更にＷｂ及び
で１のうち１種又は２種を合計で０．０５ ％以下含有
し、残部がＦｅ及び不可避的不純物からなる鋼を、熱間
圧延及び冷間圧延を経た後、再結晶焼鈍により焼鈍ま＼
の硬度（ＨＲ８０Ｔ ）が５４以下のものにし、しかる
のち圧下率５憾以上の調質圧延を施してメッキ後の硬度
を５８以上のものにすることを特徴とする開缶性に優れ
たイージーオープン缶用鋼板の製造方法にある。The present invention has been completed based on these findings, and the gist of each invention is (1) Important i
0 at ts: 0.0085% or less, )(n + 0
．． 05-0.40%, Alt 0.010-0.10
Hardness (HRill OT)
A steel plate for easy-open cans with excellent can-opening properties, characterized in that the ratio is 58 or more, (2) O in weight%: 0.00851 or less, In +
0.05-0.40 4-5, AJ: 0.010
~0.100 1 warm; , @ element! 0.005
or below, and further contains one or two of Nb and Ti.
A steel plate for easy-open cans with excellent can-opening properties, characterized by containing 0.05% or less of seeds in total, the remainder consisting of Fe and unavoidable impurities, and having a hardness (HR80T) of 58 or more. ) O in terms of weight: 0.00851 or less, Ins 0.05-0.40, ill 0.0
10~o, ioo 4, Oxygen: 0.005% or less, the remainder consisting of Tel and unavoidable impurities is hot-rolled and cold-rolled, and then recrystallized to reduce the annealed hardness ( A steel plate for easy-open cans having excellent can-opening properties, characterized in that the hardness after plating is made to be 58 or more by temper rolling at a reduction rate of 5 minutes or more. (4) Weight: O: 0.003596 or less, In + 0.0
5~'0.40%, Mul+0.010~0.100
%, oxygen: o, ooi or less, further containing one or two of Wb and 1 in a total of 0.05% or less, and the balance consisting of Fe and unavoidable impurities. After rolling and cold rolling, it is annealed by recrystallization annealing.
The hardness (HR80T) of the can is 54 or less, and then the hardness after plating is made to be 58 or more by temper rolling with a rolling reduction of 5 or more. It is in the manufacturing method of steel plate for cans.
以下、本発明について詳細に説明する。The present invention will be explained in detail below.
一般に鋼はｃ童が低下するほど軟質化する傾向にあるこ
とは良く知られているところであり、その軟質化の傾向
は主としてＣの低下に伴う結晶粒の粗大化に起因する。It is well known that steel generally tends to become softer as its carbon content decreases, and this softening tendency is mainly due to the coarsening of crystal grains as the carbon content decreases.
従来のイージーオープン缶用軟質鋼板はこの結晶粒粗大
化効果を利用したものが多かった。Many conventional soft steel sheets for easy-open cans utilize this crystal grain coarsening effect.
しかるに、本発明者等が種々の実験を行った結果、スコ
ア加工部の強度については、単に母板の強度に依存する
のみならず、スコア加工時の歪量及びその後の焼付塗装
時の硬化量がより重要であることを見い出したのである
。However, as a result of various experiments conducted by the present inventors, the strength of the score processed part does not only depend on the strength of the base plate, but also depends on the amount of distortion during score processing and the amount of hardening during subsequent baking painting. was found to be more important.
即ち、第１図に示ずように、焼付塗装時の歪硬化量は固
溶（０＋Ｎ）量に強く依存している。固溶・元素量が０
．００５０１以下になると硬化量は急激に減少し、特に
０．００８５ ％以下になると時効硬化が殆んど無視し
得るほどになる。スコア加工部の強度を下げるためには
、この固溶（０＋Ｎ）ｉを０．００８５４以下にするこ
とが非常に重要である。That is, as shown in FIG. 1, the amount of strain hardening during baking coating strongly depends on the amount of solid solution (0+N). Solid solution/element content is 0
．． When it becomes less than 0.00501, the amount of hardening decreases rapidly, and especially when it becomes less than 0.0085%, age hardening becomes almost negligible. In order to reduce the strength of the score processed part, it is very important to make this solid solution (0+N)i 0.00854 or less.
このような条件を満足させるためには、まず、Ｃ量を０
．００８５％以下にしなければならない。また、Ｃ量を
０．００８５ 多収下にすることは、スコア残厚を薄く
できるという面でも顕著な効果が認められる。In order to satisfy these conditions, first, the amount of C must be reduced to 0.
．． Must be 0.085% or less. Furthermore, setting the amount of C to 0.0085 with a high yield has a remarkable effect in that the residual thickness of the score can be reduced.
即ち、Ｃｉｌが０・００５％以上では、結晶粒界に旧っ
て粗大な板状のカーバイドが析出し、スコア加工のよう
に強度の冷間加工を施した場合には、このようなカーバ
イドの近傍に空隙が形成される。In other words, when Cil is 0.005% or more, coarse plate-like carbides are precipitated at the grain boundaries, and when intense cold working such as scoring is performed, such carbides are A void is formed in the vicinity.
スコア加工部のように板厚が極限まで薄くなると、酸化
物等の非金属介在物のみならず、このような粗大なカー
バイドもビンボール発生の原因となる。When the plate thickness becomes extremely thin as in the case of score processing, not only non-metallic inclusions such as oxides but also such coarse carbides cause the occurrence of bottle balls.
よって、Ｇ景を０．００３５１以下にすることは、単に
スコア加工部の軟質化に有効であるのみならず、ピンホ
ールを発生させずにスコア残厚を薄くすることに関して
も非常に有効であることを知見した。Therefore, setting the G-shape to 0.00351 or less is not only effective in softening the score processed part, but also very effective in reducing the remaining thickness of the score without generating pinholes. I found out that.
このＣ蓋を０．００１３５ ％以下にする手段としては
、溶鋼を真空脱ガス処理する方法が適している。As a means for reducing the C cap to 0.00135% or less, a method of vacuum degassing treatment of molten steel is suitable.
更に、固溶Ｎを少なくすることを目的として、適当な量
のＡＪを添加し、ＮをＡ４Ｎとして固定する必要がある
。但し、Ａｔは多量に含有すると種々の整置が生じてく
るので、Ａ！含有量は０．０１〜０．１０係とする。Furthermore, for the purpose of reducing solid solution N, it is necessary to add an appropriate amount of AJ to fix N as A4N. However, if At contains a large amount, various alignments will occur, so A! The content is 0.01 to 0.10.
なお、更に、必要に応じて、固溶Ｇ、Ｎを完全に固定す
る目的で微敞のＮｂまたはＴｉを添加することも有効で
ある。但し、Ｎｂ及びＴｉは多量に存在すると鋼板表面
性状を非常に劣化させるので、含有量の上限をＮｂ ＋
Ｔｉの合計で０゜０５％とする。Furthermore, if necessary, it is also effective to add a small amount of Nb or Ti for the purpose of completely fixing solid solution G and N. However, if Nb and Ti exist in large amounts, they will significantly deteriorate the surface properties of the steel sheet, so the upper limit of the content should be set to Nb +
The total amount of Ti is 0°05%.
他に、Ｎｎは不可避的不純物として劇中に存在するＳに
よる熱間脆性を防止するために添加するものである。但
し、多量に添加すると硬質化、表面性状の劣化をひきお
こすので、含有量の範囲を０．０５〜０．４０ ％とす
る。また、スコア残厚を薄くするためには介在物を極力
少なくすることが重要である。よって、酸素含有量は、
０．００５ ％以下にする。In addition, Nn is added to prevent hot embrittlement caused by S, which is present as an unavoidable impurity. However, if added in large amounts, hardening and deterioration of surface properties will occur, so the content should be in the range of 0.05 to 0.40%. Furthermore, in order to reduce the residual thickness of the score, it is important to reduce inclusions as much as possible. Therefore, the oxygen content is
Keep it below 0.005%.
籾で、上記の如き成分の鋼を通常の工程により熱間圧延
、冷間圧延し、再結晶温度以上で焼鈍すれば、焼鈍まま
の鋼板硬度（ＨＲ８０Ｔ ）は５４以下となる。しかし
、このような工程によって製造された鋼板の応力−歪曲
線は第２図の曲線Ａのようになり、伸びが非常に大きく
、開缶に要する仕事量、即ち開缶力が結果的に大きくな
る。更にまた、この鋼板はもつとも需要の多い７４以上
の硬質ブリキを製造するためには抗張力が低く、十分な
硬度を得ることができない。If a steel with the above-mentioned components is hot-rolled and cold-rolled using conventional processes and annealed at a temperature higher than the recrystallization temperature, the as-annealed steel sheet hardness (HR80T) will be 54 or less. However, the stress-strain curve of the steel plate manufactured by this process is as shown in curve A in Figure 2, and the elongation is extremely large, resulting in a large amount of work required to open the can, that is, the opening force. Become. Furthermore, this steel sheet has a low tensile strength and cannot obtain sufficient hardness to manufacture hard tinplate of grade 74 or higher, which is in high demand.
このような欠点をカバーするためには、焼鈍後の一板に
強度の調質圧延を怖し、硬度の上昇と伸びの低下を同時
に解決する方法が有効であることを見い出した。In order to overcome these drawbacks, we have found that it is effective to subject the sheet after annealing to high-strength temper rolling and to simultaneously solve the problems of increasing hardness and decreasing elongation.
通常の硬質ブリキ、即ち、低炭素鋼又はそれにＮ ＋
Ｐ 、 Ｉｎ等を添加した鋼板を単純に加熱−均熱−冷
却するサイクルで焼鈍した場合の応力−歪曲線は第２図
のＢのようになる。しかし、本発明のように軟質な鋼板
をスキンパス圧延により硬質化した場合、特に固溶元素
が少なく、赫伏応力が低いときには、応力−歪曲線はＯ
のようになる。Ordinary hard tinplate, i.e. low carbon steel or N+
When a steel plate to which P, In, etc. are added is annealed by a simple heating-soaking-cooling cycle, the stress-strain curve is as shown in FIG. 2B. However, when a soft steel plate is hardened by skin pass rolling as in the present invention, the stress-strain curve becomes O
become that way.
同一の硬度レベルでＢと０の伸びを比較した場合、Ｃの
方が圧倒的に小さいＣ伸びを十分小さくするた、めには
５係以上のスキンパス圧延が必要である。When comparing the elongation of B and 0 at the same hardness level, C is overwhelmingly smaller. In order to sufficiently reduce the C elongation, skin pass rolling of coefficient 5 or higher is required.
このような方法によって７４以上の硬質ブリキを製造し
ようとする場合には、焼鈍ままの硬度を５４以下とし、
更に５嗟以上の調質圧延を施すことにより、メッキ後の
硬度を５８以上にすればよいこ゛とを見い出したのであ
る。When trying to manufacture hard tinplate with a hardness of 74 or more by such a method, the hardness of the as-annealed plate should be 54 or less,
Furthermore, they discovered that the hardness after plating could be increased to 58 or more by subjecting the material to temper rolling for 5 times or more.
以上の説明かられかるように、本発明の特徴とする点は
、Ｃ景を極端に少なくすることにより鋼板、特にそのス
コア加工部の局部的硬化を防止し１、かつ、カーバイド
を全くなくすることによりスコア残厚を小さくすること
にある。更にまた、非常に軟質な鋼板を調質圧延するこ
とにより硬質で、かつ、伸びの小さい硬質ブリキを製造
することにある。As can be seen from the above description, the features of the present invention are that local hardening of the steel plate, especially the score-processed part thereof, is prevented by extremely reducing the C-shape, and carbide is completely eliminated. This aims to reduce the score residual thickness. Another object of the present invention is to produce hard tinplate that is hard and has low elongation by temper rolling a very soft steel plate.
本発明の製造方法は、以上述べた如く、スコア残厚、ス
コア加工部の抗張力、鋼板の伸びのいずれの因子に対し
ても有効な方法であり、したがって、得られる鋼板はこ
れら因子の相乗効果により、従来材に比べて非常に優れ
た開缶性を示すものである。As mentioned above, the manufacturing method of the present invention is effective for all factors such as the residual thickness of the score, the tensile strength of the score processed part, and the elongation of the steel sheet. Therefore, the obtained steel sheet has a synergistic effect of these factors. As a result, it exhibits extremely superior can opening performance compared to conventional materials.
次に、本発明の実施例を示す。Next, examples of the present invention will be shown.
（実施例） 第１表に示した成分の鋼を転炉で溶製し連続鋳造した。(Example) Steel having the components shown in Table 1 was melted in a converter and continuously cast.
なお、ＩＡ−Ｆは真空脱ガス装置を用いてＯ量を低下し
たものである。これらの６鋼を通常の工程にしたがい、
仕上温度ＳＯＯ℃、巻取温度５５０°Ｃで板厚２．８簡
に熱間圧延した。酸洗後、０．２８關まで冷間圧延し、
７００〜７５０℃で２０秒焼鈍した後、１５°Ｃ／８６
Ｃの冷却速度で冷却した。焼鈍ままの硬度、スキンパ
ス・リフロー処理したメッキ板の硬度及びスコア残厚と
開缶性を第２表に示した。Note that IA-F has a reduced O content using a vacuum degassing device. These 6 steels are processed according to the normal process.
It was hot rolled at a finishing temperature of SOO°C and a winding temperature of 550°C to a thickness of 2.8 mm. After pickling, cold rolling to 0.28 mm,
After annealing at 700-750℃ for 20 seconds, 15℃/86
It was cooled at a cooling rate of C. Table 2 shows the hardness of the as-annealed plate, the hardness of the plated plate after skin pass reflow treatment, the remaining score thickness, and the openability.
第２表より本発明の成分範囲の鋼Ａ−Ｄは、焼鈍ままの
硬度が５０以下と低く、スキンバス圧延後の硬度は６０
〜６１とＴ４の範囲であり、かつ、ピンホール発生臨界
スコア残厚、及び開缶力のいずれも十分低いことがわか
る。From Table 2, steels A-D having the composition range of the present invention have a low hardness of 50 or less as annealed, and a hardness of 60 or less after skin bath rolling.
61 and T4, and both the pinhole generation critical score residual thickness and can opening force are sufficiently low.
一方、比較例の＃ｉＥはスキンパス圧延率が低く、沖び
が大きいため、開缶性に劣り、またｍＦ、Ｇは共にＯ量
が多く、ピンホール発生臨界スコア残厚が大で、開缶力
が高＜、鋼Ｆの如くスキンパス圧延率を太きく（ｅ％）
しても開缶方向上は認められない。On the other hand, #iE, a comparative example, has a low skin pass rolling rate and a large offsetting, resulting in poor can openability.Moreover, mF and G both have a large amount of O, have a large pinhole generation critical score residual thickness, and can open easily. When the force is high, the skin pass rolling rate is increased like steel F (e%)
However, it is not allowed in the direction in which the can is opened.
以上説明したところからも明らかなように、本発明によ
れば、スコア残厚が薄く、かつ、開缶性に優れた硬質な
イージーオープン缶用鋼板を製造・提供できる。As is clear from the above description, according to the present invention, it is possible to manufacture and provide a hard steel plate for easy-open cans that has a small residual score thickness and is excellent in opening performance.
第１図は鋼板中の固溶（（３＋Ｎ）ｊ＆と時効硬化針と
の関係を示す図、
第２図は応−カー歪曲線を示す図である。FIG. 1 is a diagram showing the relationship between the solid solution ((3+N)j& in a steel plate and an age hardening needle, and FIG. 2 is a diagram showing the stress curve of the strain curve).
Claims (1)
．０５〜０．４０４、Ａｔ ｊ Ｏ，０１０〜０．１０
０係、酸素：０．００５％以下であって残部がＦｅ及び
不可避的不純物からなり、硬度（ＨＲ８０Ｔ ）が５８
以上を有することを特徴とする開缶性に優れたイージー
オープン缶用鋼板。 −重量％でＯｊ ０．００８５ 俤以下、Ｍｎ ＋ ０
．０５〜０．４０４、ｌ ： ０．０１０〜０．１００
％ 、酸素＝０．００５１以下であって、更にＮｂ及
びＴ１のうちの１種又は２種を合計で０．０５％以下含
有し、残部がＦｅ及び不可避的不純物からなり、硬度（
ＨＲ８０Ｔ ）が５８以上を有することを特徴とする開
缶性、に優れたイージーオープン缶用鋼板。 ＆ 重ＢｅｓでＯ： ０．００８５１以下、Ｉｎ ｓ
０．０５〜０．０４４、Ａｊ ： ０．０ＩＱ〜０．１
００％、酸素；０．００５１以下であって残部がＦＢ及
び不可避的不純物からなる鋼を、熱間圧延及び冷間圧延
を経た後、再結晶焼鈍により焼鈍ま−の硬度（ＨＲ８０
Ｔ ）が５４以下のものにし、しかるのち圧下率５係以
上の調質圧延を旌してメッキ後の硬度を５８以上のもの
にすることを特徴とする開缶性に優れたイージーオープ
ン棟缶用鋼板の製造方法。 −重ｆｔ％でＯｎ ０．００１３５％以下、Ｍｎ ｊ
０．０５〜０．４０４、ｌ ＋ ０．０１０〜０．１０
０４、酸素：０．００５ ％以下であって、更にＮｂ及
びＴ土のうちの１種又は２種を合計で０．０５４以下含
有し、残部がＦｅ及び不可避ばコ不純物からなる鋼を、
熱間圧延及び冷間圧延を経た後、再結晶焼鈍により焼鈍
ま−の硬度（ＨＲ８０Ｔ ）が５４以下のものとし、し
かるのち圧下率５係以上の調質圧延を施してメッキ後の
硬度を５８以上のものにすることを特徴とする開缶性に
優れたイージーオープン缶用鋼板の製造方法。[Claims] 1% by weight O: 0.00351 or less, In: 0
．． 05-0.404, At j O, 010-0.10
0%, oxygen: 0.005% or less, the remainder consists of Fe and inevitable impurities, hardness (HR80T) is 58
A steel plate for easy-open cans having excellent can opening properties, characterized by having the above characteristics. - Oj 0.0085 俤 or less in weight%, Mn + 0
．． 05-0.404, l: 0.010-0.100
%, oxygen = 0.0051 or less, further containing one or two of Nb and T1 in a total of 0.05% or less, the remainder consisting of Fe and unavoidable impurities, and hardness (
A steel plate for easy-open cans with excellent can opening properties, characterized by having a HR80T) of 58 or more. & Heavy Bes O: 0.00851 or less, In s
0.05-0.044, Aj: 0.0IQ-0.1
00%, oxygen: 0.0051 or less, with the remainder consisting of FB and unavoidable impurities. After hot rolling and cold rolling, the steel is recrystallized to an unannealed hardness (HR80).
An easy-to-open can with excellent opening properties, characterized in that the hardness after plating is made to be 58 or more by temper rolling at a rolling reduction of 5 factors or more. Method of manufacturing steel plates for industrial use. - On 0.00135% or less in weight ft%, Mn j
0.05~0.404, l+0.010~0.10
04. Oxygen: 0.005% or less, further containing one or two of Nb and T soil in total of 0.054% or less, and the balance consisting of Fe and unavoidable co-impurities,
After hot rolling and cold rolling, the hardness of the annealed ball (HR80T) is made 54 or less by recrystallization annealing, and then temper rolling is performed at a rolling reduction of 5 factors or more to make the hardness after plating 58. A method for producing a steel plate for easy-open cans having excellent can-opening properties.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16188283A JPS6056052A (en) | 1983-09-05 | 1983-09-05 | Steel sheet for easy-to-open can having excellent opening property and production thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16188283A JPS6056052A (en) | 1983-09-05 | 1983-09-05 | Steel sheet for easy-to-open can having excellent opening property and production thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6056052A true JPS6056052A (en) | 1985-04-01 |
| JPH0357179B2 JPH0357179B2 (en) | 1991-08-30 |
Family
ID=15743778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16188283A Granted JPS6056052A (en) | 1983-09-05 | 1983-09-05 | Steel sheet for easy-to-open can having excellent opening property and production thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6056052A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6293338A (en) * | 1985-10-17 | 1987-04-28 | Nippon Steel Corp | Steel sheet for easily opened lid excellent in can-openability and its production |
| JPS62142746A (en) * | 1985-12-18 | 1987-06-26 | Nippon Steel Corp | Steel sheet for easy-opening can |
| JPS634040A (en) * | 1986-06-23 | 1988-01-09 | Kawasaki Steel Corp | Easy opening cap having good can openability and its production |
| JPS6372827A (en) * | 1986-09-16 | 1988-04-02 | Nippon Steel Corp | Manufacture of steel sheet for easy opening lid having superior can opening property |
| JPH0158267U (en) * | 1987-10-02 | 1989-04-12 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020005408A1 (en) | 1997-08-12 | 2002-01-17 | Yuji Yamasaki | Easy-opening can end |
-
1983
- 1983-09-05 JP JP16188283A patent/JPS6056052A/en active Granted
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6293338A (en) * | 1985-10-17 | 1987-04-28 | Nippon Steel Corp | Steel sheet for easily opened lid excellent in can-openability and its production |
| JPS62142746A (en) * | 1985-12-18 | 1987-06-26 | Nippon Steel Corp | Steel sheet for easy-opening can |
| JPS634040A (en) * | 1986-06-23 | 1988-01-09 | Kawasaki Steel Corp | Easy opening cap having good can openability and its production |
| JPS6372827A (en) * | 1986-09-16 | 1988-04-02 | Nippon Steel Corp | Manufacture of steel sheet for easy opening lid having superior can opening property |
| JPH0242885B2 (en) * | 1986-09-16 | 1990-09-26 | ||
| JPH0158267U (en) * | 1987-10-02 | 1989-04-12 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0357179B2 (en) | 1991-08-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |