JP2010058143A - Method of manufacturing bar steel having deformed cross-section - Google Patents

Method of manufacturing bar steel having deformed cross-section Download PDF

Info

Publication number
JP2010058143A
JP2010058143A JP2008225771A JP2008225771A JP2010058143A JP 2010058143 A JP2010058143 A JP 2010058143A JP 2008225771 A JP2008225771 A JP 2008225771A JP 2008225771 A JP2008225771 A JP 2008225771A JP 2010058143 A JP2010058143 A JP 2010058143A
Authority
JP
Japan
Prior art keywords
rolled
silicate
rolling
aqueous solution
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2008225771A
Other languages
Japanese (ja)
Other versions
JP5317173B2 (en
Inventor
Katsuhide Nishio
克秀 西尾
Shinobu Kano
忍 狩野
Atsushi Kurobe
淳 黒部
Yoshiharu Iwamizu
義治 岩水
Yoshikatsu Nishida
義勝 西田
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.)
Nippon Steel Nisshin Co Ltd
Original Assignee
Nisshin Steel Co Ltd
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 Nisshin Steel Co Ltd filed Critical Nisshin Steel Co Ltd
Priority to JP2008225771A priority Critical patent/JP5317173B2/en
Publication of JP2010058143A publication Critical patent/JP2010058143A/en
Application granted granted Critical
Publication of JP5317173B2 publication Critical patent/JP5317173B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Metal Rolling (AREA)
  • Lubricants (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To manufacture a bar steel having a deformed cross-section of high step by suppressing occurrence of an oxidized scale by warm rolling. <P>SOLUTION: After forming a continuous and uniform coating film of Li silicate on the surface of a material to be rolled, the material having the continuous and uniform coating film is heated, and rolled while a roll having a recess at the position corresponding to a thick-walled portion is installed on at least one of upper and lower work rolls. The continuous and uniform coating film of Li silicate is formed by pressing a rubber roller against the surface of the material with aqueous solution containing Li silicate spray-coated thereon. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、幅方向に関して異なる板厚を有した異形断面条鋼を圧延によって製造する方法に関する。   The present invention relates to a method for producing deformed cross-section steel bars having different thicknesses in the width direction by rolling.

従来より電子部品用のリードフレームや軸受のリテーナーには、図1に示すような幅方向に異なる板厚を有した厚肉部1と薄肉部2が形成されている異形断面条3が使用されており、使用する部品の形状や寸法によって切断やプレスによる打ち抜き加工が施されている。そのため、板厚が1mm前後の比較的薄板で、かつ普通鋼や銅を素材として比較的軟質の異形断面条が主流であった。   2. Description of the Related Art Conventionally, lead frames for electronic parts and retainers for bearings have used a modified cross-section strip 3 having a thick portion 1 and a thin portion 2 having different plate thicknesses in the width direction as shown in FIG. It is punched by cutting or pressing depending on the shape and dimensions of the parts used. Therefore, a relatively thin plate having a thickness of about 1 mm and a relatively soft deformed cross section made of ordinary steel or copper are mainly used.

しかし、近年では、部品に加工する際の工程省略によるコストダウンや、自動車の軽量化に対応して必要な部分のみの板厚を確保して全体的な質量を低減することが活発となり、異形断面条の適用分野が広がり始めている。それによって、素材も比較的軟質なものから、硬質の素材の異形断面条の要求が増えてきている。
硬質な素材を圧延によって異形断面条に成形する場合には、軟質な素材の場合と比べて圧延荷重が増大してロール摩耗が多くなるとともに、厚肉部と薄肉部との板厚差(段差)が大きくなると1パスでの圧延成形が困難となり複数パスの圧延を余儀なくされている。これらの要因により、硬質な素材の異形断面条はコストが高くなり、大きな段差を付与できないという課題が出てきている。
However, in recent years, it has become active to reduce the overall mass by reducing the cost by reducing the process when processing into parts and securing the thickness of only the necessary parts in response to the weight reduction of automobiles. The field of application of cross sections is beginning to expand. As a result, since the material is relatively soft, the demand for a deformed cross section of a hard material is increasing.
When a hard material is formed into a deformed cross section by rolling, the rolling load increases and roll wear increases as compared with the case of a soft material, and the plate thickness difference (step difference) between the thick and thin portions increases. ) Increases, rolling forming in one pass becomes difficult, and rolling in multiple passes is forced. Due to these factors, the problem is that the deformed cross section of the hard material is expensive and cannot provide a large step.

このような硬質素材の異形断面条を圧延で製造する場合には、圧延する前に素材を加熱して温度を上げ、それによって被圧延材の変形抵抗を低下させて圧延する方法が挙げられる。しかし、被圧延材、特に鉄鋼材料を大気中で概ね300℃以上で加熱した場合には、被圧延材の表面に酸化スケールが発生して異形断面条の外観が悪化するとともに、圧延の際に酸化スケールが破砕して作業環境の悪化や圧延に使用するロールに疵が発生してしまう。
そのため、被圧延材の加熱から圧延、冷却にいたるまでをある種の雰囲気中で行う必要があるが、そのような処置をする場合には、加熱装置と圧延機の全体が雰囲気ガスで覆われるようにシールドしなければならず、製造装置のコストが高くなるという問題がある。
When manufacturing such a deformed cross section of a hard material by rolling, there is a method in which the material is heated to raise the temperature before rolling, thereby reducing the deformation resistance of the material to be rolled and rolling. However, when the material to be rolled, particularly a steel material, is heated at about 300 ° C. or more in the atmosphere, an oxide scale is generated on the surface of the material to be rolled, and the appearance of the deformed cross section is deteriorated. Oxide scale is crushed and the working environment is deteriorated and wrinkles are generated on the roll used for rolling.
Therefore, it is necessary to carry out from the heating of the material to be rolled to the rolling and cooling in a certain atmosphere, but when such treatment is performed, the entire heating device and the rolling mill are covered with atmospheric gas. Therefore, there is a problem that the cost of the manufacturing apparatus becomes high.

そして、上記で示した酸化スケール発生を抑制する方法として、特許文献1では圧延の際の潤滑油として酸化抑制剤を添加したものを供給する方法が提案されている。
また、特許文献2では、加熱した潤滑油内でコイル状の素材を加熱した後に圧延を行う方法が提案されている。
特開2005−171151号公報 特開平3−52703号公報
As a method for suppressing the generation of oxide scale as described above, Patent Document 1 proposes a method of supplying a material to which an oxidation inhibitor is added as a lubricating oil during rolling.
Patent Document 2 proposes a method of performing rolling after heating a coil-shaped material in heated lubricating oil.
JP-A-2005-171151 JP-A-3-52703

しかしながら、特許文献1で提案された方法では、被圧延材を加熱する加熱装置内では火災の観点から潤滑油を供給できず、おのずと雰囲気加熱が必要となり、雰囲気ガスのコストが高くなる問題がある。
また、特許文献2で提案された方法では、潤滑油内から引き上げて圧延ラインの入側リールにコイルを設置する際に素材表面に酸化スケールが発生してしまう問題が出てくる。
本発明は、このような酸化スケールの発生を抑制して、連続的に被圧延材を加熱、圧延して異形断面条鋼を製造する方法を提供するものである。
However, in the method proposed in Patent Document 1, lubricating oil cannot be supplied from a fire point of view within a heating apparatus that heats the material to be rolled, and thus atmospheric heating is necessary, which increases the cost of atmospheric gas. .
Further, the method proposed in Patent Document 2 has a problem that oxide scale is generated on the surface of the material when the coil is installed on the entry reel of the rolling line after being pulled out from the lubricating oil.
The present invention provides a method for producing a deformed cross-section steel bar by continuously heating and rolling a material to be rolled while suppressing the occurrence of such oxide scale.

本発明の異形断面条鋼の製造方法は、その目的を達成するため、幅方向に関して異なる板厚を有した異形断面条鋼を前記厚肉部に対応した位置に凹部を有する溝付きロールを少なくとも上下ワークロールの一方に設置して圧延によって製造する際に、被圧延材表面にLi珪酸塩の連続均一皮膜を形成した後、当該連続均一皮膜を有する被圧延材を加熱して圧延することを特徴とする。
Li珪酸塩連続均一皮膜の厚みは、Si付着量換算で0.05〜1g/mとし、被圧延材の加熱温度は300〜650℃とすることが好ましい。なお、本発明で「均一」とは膜厚が略均等であることを意味する。素材被圧延材の表面状態によって「略均等」としたものである。
In order to achieve the object, the method for producing a modified cross-section steel bar according to the present invention has at least an upper and lower workpiece having a grooved roll having a recess at a position corresponding to the thick-walled section with a different thickness in the width direction. When manufacturing by rolling by installing on one of the rolls, after forming a continuous uniform film of Li silicate on the surface of the rolled material, the rolled material having the continuous uniform film is heated and rolled. To do.
The thickness of the Li silicate continuous uniform film is preferably 0.05 to 1 g / m 2 in terms of Si adhesion amount, and the heating temperature of the material to be rolled is preferably 300 to 650 ° C. In the present invention, “uniform” means that the film thickness is substantially uniform. Depending on the surface condition of the material to be rolled, it is “substantially uniform”.

Li珪酸塩連続均一皮膜は、Li珪酸塩を含む水溶液をスプレー塗布した被圧延材の表面にゴムローラーを押し当てて前記Li珪酸塩を含む水溶液を被圧延材表面に均等に付着させた後に加熱して乾燥することによって形成することが好ましい。
また、Li珪酸塩を含む水溶液を塗布する前段階で被圧延材の端面を潰しておいたり、被圧延材のC反りを矯正しておいたりすることが好ましい。
The Li silicate continuous uniform film is heated after the rubber roller is pressed against the surface of the rolled material sprayed with an aqueous solution containing Li silicate to uniformly adhere the aqueous solution containing Li silicate to the surface of the rolled material. Then, it is preferably formed by drying.
Moreover, it is preferable that the end surface of the material to be rolled is crushed or the C warp of the material to be rolled is corrected before applying the aqueous solution containing Li silicate.

本発明の異形断面条鋼の製造方法では、被圧延材の表面にLi珪酸塩の連続均一皮膜を形成した後に被圧延材を加熱しているため、大気中で加熱しても酸素が遮断されるため酸化スケールの発生を抑制し、かつ被圧延材の変形抵抗を低くした状態で異形断面圧延を行うことができる。これによって、酸化スケールの破砕による作業環境の悪化や圧延に使用するロール表面への疵発生を招くことなく、段差の大きい異形断面条鋼を圧延によって製造することができる。
また、Li珪酸塩を含む水溶液をスプレー塗布した被圧延材の表面にゴムローラーを押し当てて前記Li珪酸塩を含む水溶液を被圧延材表面に均等に付着させた後に加熱して乾燥しているため、被圧延材の表面がフラットでない場合でもゴムの弾性変形により均一な厚みのLi珪酸塩皮膜を形成することができ、その皮膜厚のコントロールが容易なためLi珪酸塩を無駄に使用することがない。
In the method for producing a modified cross-section steel bar according to the present invention, the material to be rolled is heated after forming a continuous uniform film of Li silicate on the surface of the material to be rolled, so that oxygen is blocked even when heated in the atmosphere. Therefore, irregular section rolling can be performed in a state where generation of oxide scale is suppressed and deformation resistance of the material to be rolled is lowered. Thereby, a deformed cross-section steel bar having a large step can be produced by rolling without causing deterioration of the working environment due to crushing of the oxide scale or causing generation of wrinkles on the roll surface used for rolling.
Further, a rubber roller is pressed against the surface of the rolled material on which the aqueous solution containing Li silicate is applied by spraying to uniformly adhere the aqueous solution containing Li silicate to the surface of the rolled material, and then heated and dried. Therefore, even when the surface of the material to be rolled is not flat, it is possible to form a Li silicate film having a uniform thickness by elastic deformation of the rubber, and it is easy to control the film thickness, so that Li silicate should be used wastefully. There is no.

本発明者等は、幅方向に関して異なる板厚を有した異形断面条鋼を、溝付きロールを用いて温間領域で圧延によって製造する際に、被圧延材の表面に生成しやすい酸化スケールの発生量を極力低減する方策について鋭意検討を重ねてきた。
その過程で、Li珪酸塩の皮膜が鋼に対する酸化スケール発生の抑制効果を有することを見出し、本発明に到達した。すなわち、Li珪酸塩の皮膜は、従来知られているように緻密な構造を有していることから大気中で加熱しても外部からの酸素の侵入を阻止する効果が高い。本発明でもこの効果を利用するものである。
When the inventors produce irregular cross-section steel bars having different thicknesses in the width direction by rolling in a warm region using a grooved roll, generation of oxide scale that is likely to be generated on the surface of the material to be rolled We have made extensive studies on measures to reduce the amount as much as possible.
In the process, the present inventors found that the Li silicate film has an effect of suppressing the generation of oxide scale on steel, and reached the present invention. That is, since the Li silicate film has a dense structure as conventionally known, it has a high effect of preventing the entry of oxygen from the outside even when heated in the atmosphere. The present invention also utilizes this effect.

Li珪酸塩は、一般式Li2O・nSiO2で表される。通常、nが3.5〜7.5のものが用いられる。
一般的なアルカリ珪酸塩の中でもLi珪酸塩は、より低温での焼成が可能であり、しかも他のアルカリ珪酸塩と比べて溶融温度が高いので、より高温での耐酸素侵入防止効果が維持される。
焼成により形成されるLi珪酸塩皮膜は、一般式Li2O・nSiO2・xH2Oで表される物質を主体とした皮膜であり、吸着水や構造水の形で水分を多く保持している。この水分は焼成温度が高くなるにつれて抜けていき、皮膜の硬さも増大する。水分が多い状態の皮膜は硬さが低いので厳しい加工を施した場合に皮膜が凝集的に剥離してしまうことがある。したがって、厳しい加工が必要な場合には、皮膜中のH2O成分が焼成によりある程度以上に抜けた状態の皮膜であることが望ましい。
Li silicate is represented by the general formula Li 2 O · nSiO 2. Usually, n is 3.5 to 7.5.
Among general alkali silicates, Li silicate can be fired at a lower temperature and has a higher melting temperature than other alkali silicates, so that the effect of preventing oxygen penetration at higher temperatures is maintained. The
The Li silicate film formed by firing is a film mainly composed of a substance represented by the general formula Li 2 O.nSiO 2 .xH 2 O, and retains a lot of moisture in the form of adsorbed water and structured water. Yes. This moisture escapes as the firing temperature increases, and the hardness of the film also increases. Since the film having a high water content is low in hardness, the film may be agglomerated when subjected to severe processing. Therefore, when strict processing is required, it is desirable that the film has a state in which the H 2 O component in the film has been removed to a certain extent by firing.

連続的に鉄鋼材料である被圧延材を加熱して異形断面圧延を行うに当たって、酸化スケールの発生を抑制するためには、圧延速度に対応してLi珪酸塩皮膜を効率的に、かつ被圧延材の表面に均一厚さで形成する必要がある。Li珪酸塩皮膜からの構造的なH2Oを除去するためには、Li珪酸塩を含む水溶液を塗布した被圧延材を300℃以上で加熱してLi珪酸塩皮膜を焼成する必要がある。
なお、圧延は300℃以上の温間で行われるため、上記焼成は、ライン内に特別に焼成工程を設けることなく、圧延の前の加熱時に行うことができる。
In order to suppress the generation of oxide scale when performing rolling of irregular sections by continuously heating the material to be rolled, which is a steel material, the Li silicate film is efficiently and rolled corresponding to the rolling speed. It is necessary to form a uniform thickness on the surface of the material. In order to remove structural H 2 O from the Li silicate film, it is necessary to heat the rolled material coated with an aqueous solution containing Li silicate at 300 ° C. or higher to fire the Li silicate film.
In addition, since rolling is performed at a temperature of 300 ° C. or higher, the baking can be performed at the time of heating before rolling without providing a special baking step in the line.

Li珪酸塩皮膜の厚さがある一定量よりも薄い場合や厚い場合には、十分な酸化スケール抑制効果が発揮されなかったり、異形断面圧延時に剥離しやすくなったりして剥離物が圧延時に散乱して作業環境が悪化するという不具合が発生する。また剥離した部分は鋼素地が露出するため酸化スケールが発生してしまう。特に、Li珪酸塩皮膜が一定量よりも厚く形成された場合には、異形断面圧延時の被圧延材の変形に皮膜が追従しない領域が広くなり、その領域からの亀裂が伝播して剥離しやすくなる。
このように圧延速度が速い場合でも被圧延材の表面にLi珪酸塩皮膜を均一厚さで形成する必要がある。
このため、均一厚さのLi珪酸塩皮膜を形成する塗布法を工夫することが必要である。
When the thickness of the Li silicate film is thinner or thicker than a certain amount, sufficient oxide scale suppression effect may not be exhibited, or it may become easy to peel off during irregular section rolling, and the peeled material will be scattered during rolling. As a result, the work environment deteriorates. Moreover, since the steel substrate is exposed in the peeled portion, oxide scale is generated. In particular, when the Li silicate film is formed to be thicker than a certain amount, the area where the film does not follow the deformation of the material to be rolled during the irregular section rolling becomes wider, and cracks propagate from the area and peel off. It becomes easy.
Thus, even when the rolling speed is high, it is necessary to form a Li silicate film with a uniform thickness on the surface of the material to be rolled.
For this reason, it is necessary to devise a coating method for forming a Li silicate film having a uniform thickness.

均一厚さのLi珪酸塩皮膜を形成する手段として、Li珪酸塩を含む水溶液を含ませたゴムローラーを被圧延材に押し付ける方法もあるが、長時間安定的に均一厚さのLi珪酸塩皮膜を形成するためには、被圧延材にLi珪酸塩を含む水溶液をスプレーで塗布し、その後にゴムローラーを被圧延材に押し当ててLi珪酸塩皮膜の厚みを調整する方法が好ましい。
Li珪酸塩皮膜の厚みを調整する方法としては、エアーなどを吹き付ける方法や、固定された板や冶具で被圧延材を挟む方法でも良い。前者ではエアーの圧力や吹き付ける方向などでLi珪酸塩皮膜の厚みを調整する。後者では固定された板や冶具の間隙などを変更することでLi珪酸塩皮膜の厚みを調整する。
通常の圧延ラインにスプレーとゴムローラーを付設した態様を図2に例示する。図2中、6がスプレー8とゴムローラー9からなるLi珪酸塩皮膜形成装置であり、その下流に加熱装置7を備えている。
There is a method of pressing a rubber roller containing an aqueous solution containing Li silicate against the material to be rolled as a means for forming a Li silicate film having a uniform thickness, but the Li silicate film having a uniform thickness stably for a long time. In order to form the film, it is preferable to apply an aqueous solution containing Li silicate to the material to be rolled by spraying, and then press the rubber roller against the material to be rolled to adjust the thickness of the Li silicate film.
As a method of adjusting the thickness of the Li silicate film, a method of blowing air or the like, or a method of sandwiching the material to be rolled with a fixed plate or jig may be used. In the former, the thickness of the Li silicate film is adjusted by the pressure of air or the direction of spraying. In the latter, the thickness of the Li silicate film is adjusted by changing the gap between the fixed plate and jig.
An embodiment in which a spray and a rubber roller are attached to a normal rolling line is illustrated in FIG. In FIG. 2, reference numeral 6 denotes a Li silicate film forming device including a spray 8 and a rubber roller 9, and a heating device 7 is provided downstream thereof.

スプレー8により噴霧されたLi珪酸塩含有水溶液から形成される皮膜の厚みは、ゴムローラー9の押し当て量によってコントロールできるため被圧延材の幅方向で均一化することができ、圧延速度が速い場合でもゴムローラーが圧延速度に応じて回転することから対応が可能である。また、ローラーは表面にゴムを設置したゴムローラーであるため、被圧延材の表面に凹凸が存在した場合でも、ゴムの柔軟性により表面状態に沿って弾性変形することができ、これによって被圧延材の表面状態に拘らず、Li珪酸塩を均一に塗布することができる。   When the thickness of the film formed from the Li silicate-containing aqueous solution sprayed by the spray 8 can be controlled by the pressing amount of the rubber roller 9, it can be made uniform in the width direction of the material to be rolled, and the rolling speed is high However, this is possible because the rubber roller rotates according to the rolling speed. In addition, since the roller is a rubber roller with rubber on the surface, even when irregularities exist on the surface of the material to be rolled, it can be elastically deformed along the surface state due to the flexibility of the rubber, thereby rolling the material to be rolled. Li silicate can be applied uniformly regardless of the surface state of the material.

Li珪酸塩皮膜の厚みとしては、酸化スケールの抑制と皮膜の剥離性の観点からSi付着量換算で0.05〜1g/mが好ましい。Si付着量換算で0.05g/mに満たない場合は十分な酸化スケール抑制効果が得られず、また、1g/mを超える場合は異形断面圧延時に皮膜が剥離してしまう現象となる。
また、Li珪酸塩は、被圧延材に塗布した後に焼成させた際に素材とLi珪酸塩皮膜との間にSi−Li−O系反応層を形成してFeの拡散を阻害して酸化スケール発生の抑制に寄与している。炭素鋼の場合は、この反応層にFe成分も含まれているが、このような状態で650℃を超えた温度下に曝すと逆に酸化物層が成長して酸化スケールが発生する事態となる。つまり、異形断面圧延時での材料変形抵抗を低下させるために被圧延材を加熱する温度は650℃以下にしなければならない。しかし、被圧延材を650℃まで加熱すれば材料変形抵抗は常温の場合の約1/2まで低下するため、常温の場合と比べて同じ圧延荷重で約2倍の段差を与えることができ、硬質な材料であっても高段差な異形断面条を製造することが可能となる。
As thickness of Li silicate membrane | film | coat, 0.05-1 g / m < 2 > is preferable in conversion of Si adhesion from a viewpoint of suppression of an oxide scale and peelability of a membrane | film | coat. If in Si deposition amount in terms less than 0.05 g / m 2 can not be obtained sufficient oxide scale inhibiting effect, also a phenomenon that film when irregular cross section rolling peels when exceeding 1 g / m 2 .
In addition, when the Li silicate is fired after being applied to the material to be rolled, an Si-Li-O-based reaction layer is formed between the material and the Li silicate film to inhibit the diffusion of Fe and the oxide scale. Contributes to suppression of occurrence. In the case of carbon steel, this reaction layer also contains an Fe component. However, when exposed to temperatures exceeding 650 ° C. in this state, the oxide layer grows and an oxide scale is generated. Become. In other words, the temperature at which the material to be rolled is heated must be 650 ° C. or lower in order to reduce the material deformation resistance at the time of deformed section rolling. However, if the material to be rolled is heated to 650 ° C., the material deformation resistance is reduced to about ½ of that at room temperature, so that it is possible to give a level difference of about twice as much at the same rolling load as at room temperature. Even if it is a hard material, it becomes possible to manufacture an irregular cross-section with a high step.

Li珪酸塩皮膜の焼成温度が300℃以上であり、反応層での酸化物層が成長しない温度が650℃以下であることから、本発明の被圧延材の加熱温度は300〜650℃とした。さらに本発明では、被圧延材の変形抵抗を低下させる加熱と焼成のための加熱を同時に行うことでき、焼成のための加熱装置を別途も設ける必要がないため、設備投資コストも低く抑えることができる。   Since the firing temperature of the Li silicate film is 300 ° C. or higher and the temperature at which the oxide layer in the reaction layer does not grow is 650 ° C. or lower, the heating temperature of the rolled material of the present invention is 300 to 650 ° C. . Furthermore, in the present invention, the heating for reducing the deformation resistance of the material to be rolled and the heating for firing can be performed at the same time, and it is not necessary to separately provide a heating device for firing. it can.

ところで、被圧延材としては、通常、所定の板幅にスリット加工された素材が用いられる。このため、例えば図3に示すように板端にバリやカエリが生じたり、あるいは図4に示すように過度にC反りが生じたりする場合がある。これらが生じた状態で本発明のLi珪酸塩皮膜を形成しようとするとき、Li珪酸塩含有水溶液を付着させてもゴムローラーが板に均一に密着せず、板幅全体に均一にLi珪酸塩含有水溶液を付着させることが困難となる。
そこで、Li珪酸塩含有水溶液を付着させる前段階で、例えば図5に示す方法で被圧延材の端面を潰す、あるいは例えば図6に示す方法でC反りを矯正することが好ましい。
なお、被圧延材表面に前工程の冷間圧延等で使用したミルオイル等が付着している場合など、板幅全体に均一にLi珪酸塩含有水溶液を付着させることが困難な場合には、必要に応じて塗布前にアルカリ脱脂等を行うことが得策である。
By the way, as the material to be rolled, a material that is slit into a predetermined plate width is usually used. For this reason, for example, as shown in FIG. 3, burrs and burrs may occur at the plate edge, or C warpage may occur excessively as shown in FIG. When trying to form the Li silicate film of the present invention in a state where these occur, even if a Li silicate-containing aqueous solution is adhered, the rubber roller does not adhere uniformly to the plate, and the Li silicate is uniformly distributed over the entire plate width. It becomes difficult to attach the aqueous solution.
Therefore, it is preferable to crush the end face of the material to be rolled by, for example, the method shown in FIG. 5 or to correct the C warpage by, for example, the method shown in FIG. 6 before the Li silicate-containing aqueous solution is attached.
In addition, it is necessary when it is difficult to uniformly adhere the Li silicate-containing aqueous solution to the entire sheet width, such as when mill oil used in the cold rolling of the previous process is adhered to the surface of the material to be rolled. Depending on the conditions, it is advantageous to perform alkaline degreasing or the like before coating.

被圧延材としては、0.2質量%のCを含む炭素鋼であり、引張り強さが500N/mmのもので、板厚が2mm、板幅が200mmのコイルを使用した。この被圧延材を図2に示す圧延ラインにピンチロールを介して設置し、圧延速度5m/分、圧延荷重1600kNで圧延した。圧延に用いたワークロールは胴長方向に3mmのピッチで半径方向に1.5mmの凹凸を付与したものを用いた。ロール外径はφ120mmであり、胴長が320mmである。 As the material to be rolled, a carbon steel containing 0.2% by mass of C, a tensile strength of 500 N / mm 2 , a plate thickness of 2 mm, and a plate width of 200 mm was used. This material to be rolled was placed on a rolling line shown in FIG. 2 via a pinch roll, and rolled at a rolling speed of 5 m / min and a rolling load of 1600 kN. The work roll used for rolling used what provided the unevenness | corrugation of 1.5 mm in the radial direction with a pitch of 3 mm in the trunk | drum length direction. The roll outer diameter is φ120 mm, and the body length is 320 mm.

圧延は、被圧延材にLi珪酸塩を含む水溶液をLi珪酸塩塗布装置において塗布した後に、加熱装置にて所定の温度に被圧延材を加熱して行った。Li珪酸塩を含む水溶液はスプレーにて塗布した後に外径φ50mmのゴムローラーの押し込み量を適宜変更し、Si換算で0.01〜1.5g/mの皮膜付着量に調整した。また、比較のためにLi珪酸塩を含む水溶液を塗布しない場合とスプレーでLi珪酸塩を含む水溶液を塗布したのみの場合についても実施した。
被圧延材の加熱温度は、加熱によってテンパーカラーの発生する温度として300℃、400℃、600℃、800℃とし、比較として常温での圧延も行った。
各種条件で圧延を行った結果のまとめを表1に示す。
Rolling was performed by applying an aqueous solution containing Li silicate to the material to be rolled using a Li silicate coating device, and then heating the material to be rolled to a predetermined temperature using a heating device. The aqueous solution containing Li silicate was applied by spraying, and then the push-in amount of a rubber roller having an outer diameter of 50 mm was appropriately changed to adjust the coating amount to 0.01 to 1.5 g / m 2 in terms of Si. Moreover, it implemented also about the case where the aqueous solution containing Li silicate was not apply | coated and the aqueous solution containing Li silicate was apply | coated only by the spray for the comparison.
The heating temperature of the material to be rolled was set to 300 ° C., 400 ° C., 600 ° C., and 800 ° C. as the temperature at which the temper color was generated by heating.
Table 1 summarizes the results of rolling under various conditions.

表1に示す結果から、Li珪酸塩皮膜形成の有無に関わらず、常温で0.2mmの段差が、300℃加熱で0.3mm、400℃加熱で0.4mm、600℃加熱で段差0.6mm、800℃加熱で0.8mmの段差となり、被圧延材を加熱することによって高段差化できることが判明した。
これに対して、Li珪酸塩の付着量が0.05g/m未満の場合、いずれの加熱温度においてもテンパーカラーが着色していた。すなわち酸化皮膜が形成されていた。またLi珪酸塩を塗布した後、ゴムローラーで押しこまないで付着量を調整しない場合(No.11、21、31、41)は、被圧延材の板幅方向で0.1〜2g/mと付着量にバラツキが発生しており、付着量が1g/mを超える部分については、テンパーカラーが着色しており、圧延時に皮膜が剥離したことによって鋼素地が露出したものと推測された。一方、加熱温度が800℃の場合は、Li珪酸塩の付着量によらず全てテンパーカラーが着色していた。
以上の結果より、本発明の加熱温度300〜650℃においてテンパーカラーの発生しないLi珪酸塩の付着量は0.05〜1.0g/mであることが判明した。
From the results shown in Table 1, a step of 0.2 mm at normal temperature is 0.3 mm at 300 ° C. heating, 0.4 mm at 400 ° C. heating, 0.4 mm at 600 ° C. heating, and 600 ° C. heating, regardless of the presence or absence of Li silicate film formation. A step of 0.8 mm was obtained by heating at 6 mm and 800 ° C., and it was found that the step can be increased by heating the material to be rolled.
In contrast, when the amount of deposition of Li silicate is less than 0.05 g / m 2, temper color was colored in any of the heating temperature. That is, an oxide film was formed. Moreover, after apply | coating Li silicate, when not adjusting with the rubber roller, and adhering amount is not adjusted (No.11,21,31,41), it is 0.1-2 g / m in the sheet | seat width direction of a to-be-rolled material. 2 and the amount of adhesion varies, and the part where the amount of adhesion exceeds 1 g / m 2 is colored temper color, and it is estimated that the steel substrate is exposed by peeling the film during rolling. It was. On the other hand, when the heating temperature was 800 ° C., the temper color was colored regardless of the amount of Li silicate attached.
From the above results, it was found that the adhesion amount of Li silicate with no temper color generated at the heating temperature of 300 to 650 ° C. of the present invention is 0.05 to 1.0 g / m 2 .

Figure 2010058143
Figure 2010058143

異形断面条の模式図Schematic diagram of irregular cross section 本発明の実施状態を表す模式図Schematic diagram showing the implementation state of the present invention 被圧延材にバリを有する場合のゴムローラーとの接触状態を表す模式図Schematic diagram showing the contact state with the rubber roller when the material to be rolled has burrs 被圧延材にC反りを有する場合のゴムローラーとの接触状態を表す模式図Schematic showing the contact state with the rubber roller when the material to be rolled has C warpage 被圧延材にバリを有する場合の矯正方法の一例を示す模式図Schematic diagram showing an example of a straightening method when the material to be rolled has burrs 被圧延材にC反りを有する場合の矯正方法の一例を示す模式図Schematic diagram showing an example of a correction method when the material to be rolled has C warpage

符号の説明Explanation of symbols

1:厚肉部 2:薄肉部 3:異形断面条鋼 4:被圧延材
5:ワークロール 6:Li珪酸塩皮膜形成装置 7:加熱装置
8:スプレー 9:ゴムローラー 10:ピンチロール
11:端面矯正ロール 12:C反り矯正ロール
1: Thick part 2: Thin part 3: Deformed section bar 4: Rolled material
5: Work roll 6: Li silicate film forming device 7: Heating device
8: Spray 9: Rubber roller 10: Pinch roll
11: End face correction roll 12: C warp correction roll

Claims (5)

幅方向に関して異なる板厚を有した異形断面条鋼を前記厚肉部に対応した位置に凹部を有する溝付きロールを少なくとも上下ワークロールの一方に設置して圧延によって製造する際に、被圧延材表面にLi珪酸塩の連続均一皮膜を形成した後、当該連続均一皮膜を有する被圧延材を加熱して圧延することを特徴とする異形断面条鋼の製造方法。   The surface of the material to be rolled when the profiled steel bar having different thicknesses in the width direction is manufactured by rolling with a grooved roll having a recess at a position corresponding to the thick part at least on one of the upper and lower work rolls. After forming a continuous uniform film of Li silicate on the material, a rolled material having the continuous uniform film is heated and rolled. Li珪酸塩連続均一皮膜の厚みをSi付着量換算で0.05〜1g/mとし、被圧延材の加熱温度を300〜650℃とする請求項1に記載の異形断面条鋼の製造方法。 The thickness of the Li silicate continuous uniform film and 0.05 to 1 g / m 2 by Si deposition amount in terms, modified cross-section steel bars The method of claim 1, 300 to 650 ° C. The heating temperature of the material to be rolled. Li珪酸塩連続均一皮膜を、Li珪酸塩を含む水溶液をスプレー塗布した被圧延材の表面にゴムローラーを押し当てて前記Li珪酸塩を含む水溶液を被圧延材表面に均等に付着させた後に加熱して乾燥することによって形成する請求項1または2に記載の異形断面条鋼の製造方法。   A Li silicate continuous uniform film is heated after a rubber roller is pressed against the surface of a rolled material sprayed with an aqueous solution containing Li silicate to uniformly adhere the aqueous solution containing Li silicate to the surface of the rolled material. And the manufacturing method of the irregular cross-section bar steel of Claim 1 or 2 formed by drying. Li珪酸塩を含む水溶液を塗布する前段階で被圧延材の端面を潰す請求項3に記載の異形断面条鋼の製造方法。   The method for producing a deformed cross-section steel bar according to claim 3, wherein the end face of the material to be rolled is crushed before applying the aqueous solution containing Li silicate. Li珪酸塩を含む水溶液を塗布する前段階で被圧延材のC反りを矯正する請求項3に記載の異形断面条鋼の製造方法。   The method for producing a deformed cross-section steel bar according to claim 3, wherein C-warp of the material to be rolled is corrected in a stage before applying an aqueous solution containing Li silicate.
JP2008225771A 2008-09-03 2008-09-03 Manufacturing method of deformed section bar Expired - Fee Related JP5317173B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008225771A JP5317173B2 (en) 2008-09-03 2008-09-03 Manufacturing method of deformed section bar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2008225771A JP5317173B2 (en) 2008-09-03 2008-09-03 Manufacturing method of deformed section bar

Publications (2)

Publication Number Publication Date
JP2010058143A true JP2010058143A (en) 2010-03-18
JP5317173B2 JP5317173B2 (en) 2013-10-16

Family

ID=42185545

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008225771A Expired - Fee Related JP5317173B2 (en) 2008-09-03 2008-09-03 Manufacturing method of deformed section bar

Country Status (1)

Country Link
JP (1) JP5317173B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102049414A (en) * 2010-11-17 2011-05-11 常荣波 High-strength titanium and titanium alloy profile temperature rolling process and dedicated high-speed roll mill
KR101420759B1 (en) 2013-06-18 2014-07-17 (주)디엠피테크 Apparatus for manufacturing a flat refrigerant tube

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111299321B (en) * 2020-03-06 2022-05-10 重庆天齐锂业有限责任公司 Processing method of ultrathin lithium foil

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS545808A (en) * 1977-06-15 1979-01-17 Nippon Steel Corp Method of checking scale on metal
JPS63180311A (en) * 1987-01-22 1988-07-25 Nippon Steel Corp Hot rolling mill
JPH05202416A (en) * 1992-01-28 1993-08-10 Nippon Steel Corp Coating material for steelmaking and its usage
JPH05212428A (en) * 1992-02-07 1993-08-24 Nippon Steel Corp Low melting ni-containing coating material
JPH06198310A (en) * 1993-01-07 1994-07-19 Sumitomo Metal Ind Ltd Manufacture of seamless stainless steel tube
JPH06285573A (en) * 1993-04-02 1994-10-11 Kawai Musical Instr Mfg Co Ltd Die rolling continuous treating apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS545808A (en) * 1977-06-15 1979-01-17 Nippon Steel Corp Method of checking scale on metal
JPS63180311A (en) * 1987-01-22 1988-07-25 Nippon Steel Corp Hot rolling mill
JPH05202416A (en) * 1992-01-28 1993-08-10 Nippon Steel Corp Coating material for steelmaking and its usage
JPH05212428A (en) * 1992-02-07 1993-08-24 Nippon Steel Corp Low melting ni-containing coating material
JPH06198310A (en) * 1993-01-07 1994-07-19 Sumitomo Metal Ind Ltd Manufacture of seamless stainless steel tube
JPH06285573A (en) * 1993-04-02 1994-10-11 Kawai Musical Instr Mfg Co Ltd Die rolling continuous treating apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102049414A (en) * 2010-11-17 2011-05-11 常荣波 High-strength titanium and titanium alloy profile temperature rolling process and dedicated high-speed roll mill
KR101420759B1 (en) 2013-06-18 2014-07-17 (주)디엠피테크 Apparatus for manufacturing a flat refrigerant tube

Also Published As

Publication number Publication date
JP5317173B2 (en) 2013-10-16

Similar Documents

Publication Publication Date Title
WO2008113426A3 (en) Method for flexibly rolling coated steel strips
US9440417B2 (en) Method of making a metal-strip laminate
JP5317173B2 (en) Manufacturing method of deformed section bar
KR20150051840A (en) HOT DIP Zn-Al-Mg ALLOY PLATED STEEL SHEET HAVING EXCELLENT FORMABILITY AND ADHESION PROPERTY AND METHOD FOR MANUFACTURING THE SAME
PL2098607T3 (en) Method of coating a metal strip and installation for implementing the method
JP4057636B1 (en) Pre-painting method for painted steel
EP0119036B1 (en) Metal-coating a metallic substrate
JP4619404B2 (en) Hot-rolled steel sheet manufacturing method
JP5386772B2 (en) Method for producing alloyed hot-dip galvanized steel strip
KR20150049254A (en) Semi-alloyed hot-rolled hot-dip galvanizing steel sheet having excellent workability and coating adhesion and method for manufacturing the same
CN113025931B (en) Method for eliminating residual stress of copper alloy plate strip
JP2003306745A (en) Hot rolled steel sheet having excellent surface property and production method therefor
JP2004091831A (en) Manufacturing apparatus and manufacturing method for hot dip coated metallic strip
JP5354156B2 (en) Method for producing galvannealed steel sheet
JP5122363B2 (en) Roll for molten metal plating bath excellent in rotation and production method thereof
US20090311428A1 (en) Method of producing an adherent metallic coating on a steel sheet product
JP4009255B2 (en) In-furnace roll with cermet powder and excellent build-up and oxidation resistance
JP4411196B2 (en) High tensile alloyed hot-dip galvanized steel sheet with excellent powdering resistance
JP3233043B2 (en) Manufacturing method of hot-dip galvanized steel sheet
JP3718906B2 (en) Method for producing hot-rolled steel sheet with hot metal plating
JP2004100029A (en) Method for producing hot dip plated metal strip
JP3302265B2 (en) Manufacturing method of zinc-iron alloyed hot-dip coated steel sheet
JP2007254875A (en) Method for removing deposit from plating bath roll surface
JPH06336663A (en) Continuous hot dip metal coating method of band steel
JP4604327B2 (en) Cold rolling method of raw steel sheet for hot metal plating and manufacturing method of alloyed hot metal plating steel sheet

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20110902

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20130617

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: 20130704

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20130704

R150 Certificate of patent or registration of utility model

Ref document number: 5317173

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

LAPS Cancellation because of no payment of annual fees