JP5104413B2 - Manufacturing method of steel plate for cans - Google Patents
Manufacturing method of steel plate for cans Download PDFInfo
- Publication number
- JP5104413B2 JP5104413B2 JP2008057653A JP2008057653A JP5104413B2 JP 5104413 B2 JP5104413 B2 JP 5104413B2 JP 2008057653 A JP2008057653 A JP 2008057653A JP 2008057653 A JP2008057653 A JP 2008057653A JP 5104413 B2 JP5104413 B2 JP 5104413B2
- Authority
- JP
- Japan
- Prior art keywords
- cans
- rolling
- steel plate
- roughness
- roll
- 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.)
- Active
Links
Landscapes
- Electroplating Methods And Accessories (AREA)
- Metal Rolling (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Description
本発明は、缶用鋼板用原板の製造方法に関し、特に、すずめっき後の表面光沢に優れる缶用鋼板用原板の製造方法に関する。また、本発明は、前記缶用鋼板用原板からの缶用鋼板の製造方法にも関する。 The present invention relates to a method for producing an original plate for a steel plate for cans, and more particularly to a method for producing an original plate for a steel plate for cans that is excellent in surface gloss after tin plating. Moreover, this invention relates also to the manufacturing method of the steel plate for cans from the said original plate for steel plates for cans.
ぶりきやティンフリースチール等の缶用鋼板は、各種の飲料缶、食缶、菓子缶等の化粧缶、ガロン缶、ぺール缶およびその他雑缶などに広く用いられている。これら缶用鋼板は、消費者の嗜好に合った表面(表面粗度、表面光沢、表面色調)とするために、用途によりその表面仕上げをB(ブライト仕上げ)、R(粗面仕上げ)、S(シルバー仕上げ)およびM(マット仕上げ)に区別して製造されている。 Steel plates for cans such as tinplate and tin-free steel are widely used in cosmetic cans such as various beverage cans, food cans and confectionery cans, gallon cans, pail cans and other cans. These steel sheets for cans have a surface finish (surface roughness, surface gloss, surface color tone) that suits consumers' preferences, and the surface finishes are B (bright finish), R (rough finish), S depending on the application. (Silver finish) and M (matte finish).
ところで、近年、消費者の好みの多様化に伴い、表面光沢に優れる缶用鋼板(特にぶりき)が要求されることが多くなった。また、鋼板の表面にすず(Sn)を電気めっきしたぶりきの場合、めっき金属であるSnが希少金属であることから、できるだけ目付量を低減したいという要求がある。しかし、目付量を減らすことは、表面粗度の低下(劣化)を招くという問題がある。 By the way, in recent years, with the diversification of consumer preferences, steel plates for cans (especially tinplate) having excellent surface gloss have been increasingly demanded. Further, in the case of tin plating (Sn) electroplated on the surface of a steel plate, there is a demand for reducing the basis weight as much as possible because Sn, which is a plating metal, is a rare metal. However, reducing the basis weight has a problem in that the surface roughness is reduced (deteriorated).
表面光沢を改善する方法としては、調質圧延(スキンパス圧延)において使用するロールの粗度を調整することにより、めっき原板の表面粗度を低減する方法が一般的である。例えば、特許文献1には、鋼板を複数スタンドの圧延機に通して調質圧延を行うに当たり、少なくとも最前段の圧延ロールを粗さRa1.2μm以下のスクラッチブライトロールとし、少なくとも最後段の圧延ロールを、粗さRa0.5μm以下のブライトロールとして調質圧延を行うことにより、高光沢の缶用鋼板を得る技術が開示されている。
しかしながら、上記従来技術のように、調質圧延ロールの粗度を制御して調質圧延を行っていても、工程的に生産している缶用鋼板の中には、時としてすずめっき後の光沢不良が大量に発生することがあった。また、調質圧延後の鋼板(すなわち、めっき原板)の表面粗度は調質圧延ロールを交換した当初は低粗度であっても、調質圧延距離の増加(延長)に伴い、調質圧延ロールの粗度が幅方向に不均一になり、光沢差が発生し、ロール交換を頻繁に行わざるを得ないという問題もあった。特に、その傾向は、Cが0.0050mass%以下の極低C材で、Mnを0.4〜0.5mass%と比較的高めに含有する缶用鋼板において多発する傾向があった。 However, even if the temper rolling is carried out by controlling the roughness of the temper rolling roll as in the above prior art, in the steel plate for cans produced in the process, sometimes after tin plating In some cases, a large amount of poor gloss occurred. Moreover, even if the surface roughness of the steel plate after temper rolling (that is, the plating base plate) is low at the beginning when the temper rolling roll is replaced, the tempering is performed with the increase (extension) of the temper rolling distance. There was also a problem that the roughness of the rolling roll became non-uniform in the width direction, a difference in gloss occurred, and the rolls had to be replaced frequently. In particular, the tendency tended to occur frequently in steel sheets for cans, which is an extremely low C material with C of 0.0050 mass% or less and relatively high Mn, 0.4 to 0.5 mass%.
上記のように、従来技術だけでは、調質圧延後の鋼板の表面粗度を安定して小さい範囲に制御できないという問題があった。
この問題に対しては、調質圧延後の鋼板コイルを、抜き取りで試験的にめっき工程に流したり、各鋼板コイルからサンプルを採取してめっき試験を行い事前に評価を行ったりしていたため、生産性の低下の原因となっていた。そのため、安定して、めっき原板の表面粗度を小さい範囲に制御できる技術の開発が求められていた。
As described above, the conventional technique alone has a problem that the surface roughness of the steel sheet after temper rolling cannot be stably controlled within a small range.
For this problem, the steel sheet coil after temper rolling was sampled and flowed to the plating process on a trial basis, or a sample was taken from each steel sheet coil to perform a plating test and evaluated in advance. It was the cause of productivity decline. Therefore, development of the technique which can control the surface roughness of a plating original plate to the small range stably was calculated | required.
本発明の目的は、上記のような極低C材を素材とする缶用鋼板においても、めっき原板の表面粗度を安定して均一に制御でき、すずめっき後の光沢不良を引き起こすことのない缶用鋼板用原板の製造方法、ならびにその原板からの缶用鋼板の製造方法を提案することにある。 The object of the present invention is to enable stable and uniform control of the surface roughness of the plating original plate even in the steel plate for cans made of the above-mentioned extremely low C material, and does not cause poor gloss after tin plating. The object is to propose a method of manufacturing a steel plate for cans and a method of manufacturing a steel plate for cans from the original plate.
発明者らは、極低C材における上記光沢不良の発生原因について種々の調査を行った。
始めに、めっき後の鋼板の光沢不良部と正常部とについて、めっき前(調質圧延後)の鋼板対応箇所の分析等により比較調査したが、板面粗度や付着物質を比較しても、その差を検出することはできなかった。
そこで次に、調質圧延に使用したロール表面の付着物を分析した結果、光沢の低い部分ではMnの検出量が多く、光沢の高い部分ではMnの検出量が少ないことがわかった。このことから、鋼中のMnが調質圧延前の焼鈍中に表面濃化し、該表面濃化したMnが、調質圧延に使用中のロールに堆積することにより微小な凹凸を形成し、この凹凸の転写により形成された板面の凹凸が、光の乱反射の違いから光沢不良(光沢差)を発生させることがわかった。
The inventors conducted various investigations on the cause of the occurrence of the gloss failure in the extremely low C material.
First, we compared the poorly polished part and the normal part of the steel sheet after plating by analyzing the steel plate-corresponding parts before plating (after temper rolling). The difference could not be detected.
Then, as a result of analyzing the deposits on the roll surface used in the temper rolling, it was found that the Mn detection amount was large in the low gloss portion and the Mn detection amount was small in the high gloss portion. From this, the Mn in the steel thickens during annealing before temper rolling, and the surface-enriched Mn forms minute irregularities by depositing on the roll being used for temper rolling. It was found that the unevenness of the plate surface formed by the unevenness transfer causes poor gloss (gloss difference) due to the difference in irregular reflection of light.
極低C材において、かかる光沢不良を防止するためには、Mnの含有量を少なくすることが有効であると考えられる。しかし、単にMn量を低減するだけでは、鋼板の強度が低下し、所定の調質度(表面硬さ)を達成できない。
そこでさらに、光沢不良を招かずに所定の調質度を達成する手段を鋭意検討し、その結果、表面濃化せずに強度を確保しうる成分系として、B含有量を制御した成分系が、表面光沢の安定性向上に顕著な効果を発揮することを見出し、以下の要旨構成になる本発明をなすに至った。
(請求項1)
mass%で、C:0.0015〜0.0050%、Mn:0.2〜0.4%、Al:0.01〜0.12%、N:0.0010〜0.0070%、Nb:4×C〜20×C、B:0.04−0.08×Mn〜0.07−0.08×Mnを含み残部がFeおよび不可避的不純物からなる鋼板を、複数スタンドの圧延機にて、少なくとも第1スタンドの圧延ロールを粗度Ra0.6μm以下のスクラッチブライトロールとし、少なくとも最終スタンドの圧延ロールを粗度Ra0.5μm以下のブライトロールとして、調質圧延することを特徴とする缶用鋼板用原板の製造方法。
(請求項2)
請求項1に記載の製造方法で製造された缶用鋼板用原板にすずめっきを施すことを特徴とする缶用鋼板の製造方法。
(請求項3)
前記すずめっきを電気すずめっきとすることを特徴とする請求項2に記載の缶用鋼板の製造方法。
In extremely low C materials, it is considered effective to reduce the Mn content in order to prevent such poor gloss. However, simply reducing the amount of Mn reduces the strength of the steel sheet and cannot achieve a predetermined tempering degree (surface hardness).
In view of this, the present inventors have intensively studied means for achieving a predetermined tempering degree without incurring a gloss failure. As a result, as a component system capable of ensuring strength without surface concentration, a component system with a controlled B content is provided. As a result, the inventors have found that a remarkable effect is exhibited in improving the stability of the surface gloss, and the present invention has the following gist configuration.
(Claim 1)
In mass%, C: 0.0015 to 0.0050%, Mn: 0.2 to 0.4%, Al: 0.01 to 0.12%, N: 0.0010 to 0.0070%, Nb: 4 × C to 20 × C, B: 0.04 to 0.08 × Mn A steel plate comprising 0.07-0.08 × Mn and the balance being Fe and inevitable impurities, and using a multi-stand rolling mill, at least the first stand rolling roll is a scratch bright roll with a roughness Ra of 0.6 μm or less, and at least the final stand A temper-rolling is performed on the rolling roll as a bright roll having a roughness Ra of 0.5 μm or less.
(Claim 2)
A method for producing a steel plate for cans, characterized in that tin plating is performed on the original plate for steel plates for cans produced by the production method according to claim 1.
(Claim 3)
The method for producing a steel plate for cans according to claim 2, wherein the tin plating is electro tin plating.
本発明によれば、缶用鋼板用原板の表面粗度を均一に小さい範囲に制御することができ、経時的にも表面粗度の変化を少なくすることが可能となる。その結果、調質圧延における圧延ロールの交換頻度を大幅に低減できると共に、表面光沢に優れた缶用鋼板(すずめっき鋼板、特に電気すずめっき鋼板)を安定して製造することが可能となる。 According to the present invention, the surface roughness of the steel plate for cans can be controlled to a uniformly small range, and the change in the surface roughness can be reduced over time. As a result, it is possible to significantly reduce the replacement frequency of the rolling rolls in the temper rolling, and to stably produce a steel plate for cans (tin-plated steel plate, particularly electroplated steel plate) having excellent surface gloss.
以下に、本発明要件の限定理由を説明する。
(対象鋼板の組成)
まず、調質圧延に供する鋼板の組成の限定理由について以下に説明する。以下の説明において、組成の成分含有量の単位はmass%であり、%と略記される。
C:0.0015〜0.0050%
すずめっきした缶用鋼板の光沢不良は、極低C材において主に発生する。そこで、本発明においては、対象材をCが0.0050%以下の極低C材に限定する。また、Cが0.0050%超では固溶Cが多くなりすぎて時効性等の材質劣化を引き起こし、また、固溶Cを固定するためのNb等の炭窒化物形成元素の増加を招くため実用上好ましくない。一方、精錬コストの観点からC量の下限を0.0015%とした。
The reasons for limiting the requirements of the present invention will be described below.
(Composition of the target steel plate)
First, the reason for limiting the composition of the steel sheet to be subjected to temper rolling will be described below. In the following description, the unit of the component content of the composition is mass% and is abbreviated as%.
C: 0.0015-0.0050%
The gloss failure of tin-plated steel plates for cans mainly occurs in extremely low C materials. Therefore, in the present invention, the target material is limited to an extremely low C material having C of 0.0050% or less. On the other hand, if C exceeds 0.0050%, the amount of solute C increases so much that it causes deterioration of materials such as aging, and also causes an increase in carbonitride forming elements such as Nb for fixing solute C. It is not preferable. On the other hand, the lower limit of the C amount is set to 0.0015% from the viewpoint of refining costs.
Mn:0.2〜0.4%
Mn量が0.2%未満では熱間脆性を生じることがある。また、0.4%超においてはMnの表面濃化による光沢の不均一が発生する。それゆえ、Mn量は0.2〜0.4%の範囲とした。
Al:0.01〜0.12%
Al量が0.01%未満では脱酸効果が十分に得られない。また、NとAlNを形成することにより、鋼中の固溶Nを減少させる効果も十分に得られなくなる。一方、0.12%超になるとこの効果が飽和するばかりか、アルミナ等の介在物を生じやすくなる。よって、Al量は0.01〜0.12%の範囲とした。なお、好ましくは0.01〜0.10%の範囲である。
Mn: 0.2-0.4%
If the Mn content is less than 0.2%, hot brittleness may occur. On the other hand, if it exceeds 0.4%, non-uniform gloss occurs due to Mn surface concentration. Therefore, the Mn content is in the range of 0.2 to 0.4%.
Al: 0.01 to 0.12%
If the Al content is less than 0.01%, a sufficient deoxidation effect cannot be obtained. Further, by forming N and AlN, the effect of reducing the solid solution N in the steel cannot be sufficiently obtained. On the other hand, if it exceeds 0.12%, not only this effect is saturated but also inclusions such as alumina are likely to occur. Therefore, the Al content is set in the range of 0.01 to 0.12%. In addition, Preferably it is 0.01 to 0.10% of range.
N:0.0010〜0.0070%
Nを0.0010%未満とすると、鋼の製造コストが上昇し、安定的な製造も困難になる。一方、Nが0.0070%を超えると溶接性を確保するために必要なB量が増加する。よって、N量は、0.0010〜0.0070%の範囲とした。なお、好ましくは0.0015〜0.10%の範囲である。
Nb:4×C〜20×C
Nbは非時効性を確保するために必要な元素である。NbはNbCを形成することで鋼中の固溶Cを減少させる働きがあるが、その効果を十分に発揮させるために、4×C(%)以上の添加量(添加後の鋼中含有量の意。以下同じ)が必要である。一方、Nb添加量が多すぎる(20×C(%)超である)と、固溶Cを減少させる働きが飽和するのに対して、再結晶温度を上昇させる欠点が生じる。したがって、Nb量は、4×C〜20×C(%)の範囲とする。
N: 0.0010 to 0.0070%
If N is less than 0.0010%, the manufacturing cost of steel increases and stable manufacturing becomes difficult. On the other hand, when N exceeds 0.0070%, the amount of B necessary for ensuring weldability increases. Therefore, the N amount is set in the range of 0.0010 to 0.0070%. In addition, Preferably it is 0.0015 to 0.10% of range.
Nb: 4 x C to 20 x C
Nb is an element necessary for ensuring non-aging properties. Nb has the function of reducing the solid solution C in the steel by forming NbC, but in order to fully demonstrate its effect, the addition amount of 4 × C (%) or more (content in the steel after addition) The same shall apply hereinafter). On the other hand, if the amount of Nb added is too large (greater than 20 × C (%)), the function of reducing the solid solution C is saturated, but the disadvantage of raising the recrystallization temperature occurs. Therefore, the Nb amount is in the range of 4 × C to 20 × C (%).
B:0.04−0.08×Mn〜0.07−0.08×Mn
Bの一部は鋼中で固溶状態で存在することにより、固溶強化により鋼板の強度を上げる働きを持つ。本発明の最も重要な特徴は、MnをBに置き換えることで同等の硬さを維持しつつMn量を減少させることにある。Mnの減少による硬さの低下を補うために、等価となるB量として0.04−0.08×Mn〜0.07−0.08×Mn(%)の範囲とする。
B: 0.04-0.08 x Mn to 0.07-0.08 x Mn
A part of B exists in a solid solution state in the steel, and thus has a function of increasing the strength of the steel plate by solid solution strengthening. The most important feature of the present invention is that the amount of Mn is reduced while maintaining the same hardness by replacing Mn with B. In order to compensate for the decrease in hardness due to the decrease in Mn, the equivalent amount of B is set in the range of 0.04−0.08 × Mn to 0.07−0.08 × Mn (%).
組成から上記各成分を除いた残部はFeおよび不可避的不純物からなる。不可避的不純物は極力低減することが望ましい。なお、Si、P、Sについては、製鋼コストの観点から、Si:0.2%以下、P:0.05%以下、S:0.03%以下をそれぞれ許容範囲とするのが好ましい。
(第1スタンドの圧延ロール)
調質圧延に際し、少なくとも第1スタンドの圧延ロールは、粗度Ra 0.6μm以下のスクラッチブライトロールとする必要がある。ダルロールや粗度Ra 0.6μm超のスクラッチブライトロールでは、圧延距離の増加に伴う光沢差の増加が大きくなる。なお、好ましくは粗度Ra 0.20μm以上である。粗度Ra 0.20μm以上とすると、調質度が未達となりにくい。ロール表面処理についてはとくに限定されないが、耐摩耗の面から例えばCrめっきを施してもよい。
The balance excluding the above components from the composition consists of Fe and inevitable impurities. It is desirable to reduce inevitable impurities as much as possible. In addition, about Si, P, and S, it is preferable to make Si: 0.2% or less, P: 0.05% or less, and S: 0.03% or less into an allowable range from a viewpoint of steelmaking cost, respectively.
(1st stand roll)
At the time of temper rolling, at least the rolling roll of the first stand needs to be a scratch bright roll having a roughness Ra of 0.6 μm or less. In a dull roll or a scratch bright roll with a roughness Ra of more than 0.6 μm, the increase in gloss difference increases with an increase in rolling distance. The roughness Ra is preferably 0.20 μm or more. When the roughness Ra is 0.20 μm or more, the tempering degree is not easily achieved. The roll surface treatment is not particularly limited, but for example, Cr plating may be applied from the viewpoint of wear resistance.
なお、本発明において粗度RaはJIS B 0601-1994に規定される算術平均粗さRaである。
(最終スタンドの圧延ロール)
所定のレベル以上の光沢度を確保するために、調質圧延の少なくとも最終スタンドの圧延ロールは粗度Ra 0.5μm以下のブライトロールとする必要がある。ブライトロールは、目標の粗度に応じてミラー、スクラッチのいずれでもよいが、粗度がRa 0.5μm超であると光沢度(めっき後含む)が確保できない。ロール表面処理についてはとくに限定されないが、耐摩耗の面から例えばCrめっきを施してもよい。
(全3スタンド以上の場合の第1および最終のスタンド以外のスタンドの圧延ロール)
調質圧延を全3スタンド以上の圧延機で行う場合、第1および最終のスタンド以外のスタンドの圧延ロールは、高光沢度を確保するために粗度Ra1.2μm以下のブライトロールが好ましい。より好ましくは、粗度Ra0.5〜0.6μmのブライトロールである。ロール表面処理についてはとくに限定されないが、耐摩耗の面から例えばCrめっきを施してもよい。
(調質圧延のその他の条件)
調質圧延は、鋼板の潤滑を行なう潤滑圧延としても、潤滑圧延を行なわないドライ圧延としてもよい。とくに本発明の効果はドライ圧延の場合に発揮されるのでドライ圧延とすることが好ましい。
In the present invention, the roughness Ra is an arithmetic average roughness Ra defined in JIS B 0601-1994.
(Rolling roll of the last stand)
In order to secure a glossiness of a predetermined level or higher, it is necessary to use a bright roll having a roughness Ra of 0.5 μm or less for at least the final stand of the temper rolling. The bright roll may be either a mirror or a scratch depending on the target roughness, but if the roughness exceeds Ra 0.5 μm, the gloss (including after plating) cannot be ensured. The roll surface treatment is not particularly limited, but for example, Cr plating may be applied from the viewpoint of wear resistance.
(Rolling rolls for stands other than the first and final stands when all three or more stands are used)
When temper rolling is performed with a rolling mill having three or more stands, the rolls of the stands other than the first and final stands are preferably bright rolls having a roughness Ra of 1.2 μm or less in order to ensure high gloss. More preferably, it is a bright roll having a roughness Ra of 0.5 to 0.6 μm. The roll surface treatment is not particularly limited, but for example, Cr plating may be applied from the viewpoint of wear resistance.
(Other conditions for temper rolling)
The temper rolling may be a lubrication rolling that lubricates a steel plate or a dry rolling that does not perform lubrication rolling. In particular, since the effect of the present invention is exhibited in the case of dry rolling, dry rolling is preferable.
延伸率は、要求される硬度に応じて適宜選択すればよいが、3%以下が好ましい。より好ましくは0.5〜2.5%、さらに好ましくは1.0〜2.0%である。
(調質圧延後のめっき)
調質圧延後のめっきについては、缶用鋼板製造用として一般的な、すずめっき、Crめっき、あるいはこれらにNi下地処理やクロメート処理を施すなど、諸種のめっき法を適用することができるが、本発明の効果顕現性の面からは、すずめっきが好ましく、より好ましくは電気すずめっきである。
(光沢度)
光沢度は、光沢度計を用い入射角20°で測定した。鋼板の幅方向について光沢度を測定し、その測定データの最大値と最小値の平均値を光沢度とした。
The stretching ratio may be appropriately selected according to the required hardness, but is preferably 3% or less. More preferably, it is 0.5-2.5%, More preferably, it is 1.0-2.0%.
(Plating after temper rolling)
For plating after temper rolling, various plating methods can be applied, such as tin plating, Cr plating, or Ni undercoating or chromate treatment, which is common for steel plate production for cans. From the standpoint of effect manifestation of the present invention, tin plating is preferable, and electroplating is more preferable.
(Glossiness)
The glossiness was measured using a glossmeter at an incident angle of 20 °. The glossiness was measured in the width direction of the steel sheet, and the average value of the maximum and minimum values of the measurement data was defined as the glossiness.
表1に示す組成になる鋼材を、同一の条件で熱間圧延し、次いで冷間圧延して板厚0.32mm×板幅850mmの冷延コイルとし、該冷延コイルを、760℃×10秒で連続焼鈍後、全2スタンドの調質圧延機にて延伸率2.0%で調質圧延(ドライ圧延)し、缶用鋼板用原板(略して原板)とした。調質圧延では第1スタンドに粗度Ra0.5μmのスクラッチブライトロールを使用し、第2スタンドには粗度Ra0.18μmのブライトロールを使用した。 The steel material having the composition shown in Table 1 is hot-rolled under the same conditions, and then cold-rolled to form a cold-rolled coil having a sheet thickness of 0.32 mm and a sheet width of 850 mm. After continuous annealing, the steel sheet was temper-rolled (dry-rolled) at a draw ratio of 2.0% using a temper rolling mill with 2 stands, and used as a steel plate for cans (abbreviated as a base plate). In the temper rolling, a scratch bright roll having a roughness Ra of 0.5 μm was used for the first stand, and a bright roll having a roughness Ra of 0.18 μm was used for the second stand.
このとき、鋼板を100t調質圧延した際の原板の光沢差発生状況を、◎、○、△、×、××の5段階に評価した。光沢差の評価基準を以下に示す。
光沢差の評価基準
A=(100t調質圧延後の光沢度)/(調質圧延開始時の光沢度)×100(%)
◎:A≧95%
○:95%>A≧90%
△:90%>A≧70%
×:70%>A≧50%
××:50%>A
また、原板の硬さを測定した。これらの結果を表1に併記した。
At this time, the gloss difference occurrence state of the original sheet when the steel sheet was temper-rolled 100 t was evaluated in five stages of ◎, ◯, Δ, ×, and XX. The evaluation criteria for the gloss difference are shown below.
Evaluation Criteria of Gloss Difference A = (Glossiness after 100t temper rolling) / (Glossiness at the start of temper rolling) × 100 (%)
A: A ≧ 95%
○: 95%> A ≧ 90%
Δ: 90%> A ≧ 70%
×: 70%> A ≧ 50%
XX: 50%> A
Moreover, the hardness of the original plate was measured. These results are also shown in Table 1.
比較例No.1,2では、Mnが多すぎるため硬さの低下はないが、100t調質圧延した後には程度の悪い光沢差が発生していた。比較例No.6では、Mnを適量にしたため光沢差の発生はほとんどないが、Bが少なすぎて硬さが低下した。これらに比べ、本発明例No.3〜5では、Mn,Bを適量としたので、100t調質圧延した後も光沢差の発生はほとんどなく、硬さも十分なレベルを維持した。 In Comparative Examples Nos. 1 and 2, there was no decrease in hardness because there was too much Mn, but a poor gloss difference occurred after 100t temper rolling. In Comparative Example No. 6, since an appropriate amount of Mn was used, there was almost no gloss difference, but B was too small to reduce the hardness. Compared to these, in Examples Nos. 3 to 5 of the present invention, since Mn and B were set to appropriate amounts, there was almost no gloss difference even after 100 t temper rolling, and the hardness was maintained at a sufficient level.
また、上記各原板から採取したサンプルにすずめっき(目付量2.8g/m2)を施した後、光沢差発生状況を原板と同様に評価し、それぞれ対応する原板と同様の評価結果を得た。 Moreover, after tin plating (weight per unit area 2.8 g / m 2 ) was applied to the samples collected from the respective original plates, the gloss difference occurrence state was evaluated in the same manner as the original plates, and the same evaluation results as the corresponding original plates were obtained. .
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008057653A JP5104413B2 (en) | 2008-03-07 | 2008-03-07 | Manufacturing method of steel plate for cans |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008057653A JP5104413B2 (en) | 2008-03-07 | 2008-03-07 | Manufacturing method of steel plate for cans |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2009214114A JP2009214114A (en) | 2009-09-24 |
JP5104413B2 true JP5104413B2 (en) | 2012-12-19 |
Family
ID=41186553
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2008057653A Active JP5104413B2 (en) | 2008-03-07 | 2008-03-07 | Manufacturing method of steel plate for cans |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP5104413B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101356868B1 (en) * | 2011-12-08 | 2014-02-11 | 주식회사 포스코 | Continous manufacturing device of ferritic stainless steel and continuous manufacturing method of using the same |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06104862B2 (en) * | 1989-03-06 | 1994-12-21 | 川崎製鉄株式会社 | Manufacturing method of cold-rolled steel sheet for work excellent in bake hardenability and non-aging at room temperature |
JP3165286B2 (en) * | 1993-06-24 | 2001-05-14 | 新日本製鐵株式会社 | Manufacturing method of plating original plate for high surface quality can |
JP3546605B2 (en) * | 1996-07-29 | 2004-07-28 | Jfeスチール株式会社 | Manufacturing method of steel sheet for cans |
JP2000197802A (en) * | 1999-01-07 | 2000-07-18 | Tomen Kenki Kk | Filter press apparatus |
JP4325436B2 (en) * | 2004-02-27 | 2009-09-02 | Jfeスチール株式会社 | Steel plate for cans, steel plate for cans and method for producing them |
JP2007270167A (en) * | 2006-03-30 | 2007-10-18 | Jfe Steel Kk | Method for producing galvanized steel sheet excellent in baking hardenability |
-
2008
- 2008-03-07 JP JP2008057653A patent/JP5104413B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
JP2009214114A (en) | 2009-09-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4804996B2 (en) | Method for producing alloyed hot-dip galvanized steel sheet with good workability, powdering property and slidability | |
JP5858208B1 (en) | Steel plate for high-strength container and manufacturing method thereof | |
KR101989712B1 (en) | Steel sheet for two-piece can and manufacturing method therefor | |
EP3187612B1 (en) | Steel sheet for cans and method for manufacturing steel sheet for cans | |
JP6028884B1 (en) | Steel plate for cans and method for producing steel plate for cans | |
JP4901457B2 (en) | Aluminum alloy plate for cap and method for producing the same | |
JPWO2008133175A1 (en) | Soft tin steel sheet and manufacturing method thereof | |
JP5104413B2 (en) | Manufacturing method of steel plate for cans | |
JP4325436B2 (en) | Steel plate for cans, steel plate for cans and method for producing them | |
JP4818880B2 (en) | Method for producing bake hardenable cold rolled steel sheet with excellent ductility and room temperature aging resistance | |
AU2017227455A1 (en) | Steel Sheet for Can and Method for Manufacturing the Same | |
CN113215373B (en) | Method for eliminating fine line defect at edge of boron-containing steel | |
KR101616252B1 (en) | A method for manufacturing a hot dip aluminum steel sheet having excellent surface bright | |
JP3783439B2 (en) | Method for temper rolling of steel sheet | |
JP6673525B2 (en) | Steel plate and method for producing the same, and secondary cold rolling mill | |
JP3276582B2 (en) | Ni diffusion plated steel sheet and method for manufacturing the same | |
JP4818879B2 (en) | Method for producing cold-rolled steel sheet with excellent ductility and room temperature aging resistance | |
JPH06328103A (en) | Manufacture of original sheet to be plated for high-quality surface can | |
JP2002282903A (en) | Method for manufacturing steel sheet for rigid can having excellent luster | |
JP4938701B2 (en) | Manufacturing method of pre-coated steel sheet | |
JP4681476B2 (en) | Method for producing alloyed hot-dip galvanized steel sheet with excellent surface properties | |
JPH07278744A (en) | Surface treated starting sheet for di can, excellent in bearing strength an neck-in characteristic, and its production | |
JP2005319480A (en) | Method for manufacturing low-glossiness plated original sheet |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20110128 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20120106 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20120904 |
|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20120917 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 5104413 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20151012 Year of fee payment: 3 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |