JPH02179301A - Cold rolled steel sheet having single bright surface and its manufacture - Google Patents
Cold rolled steel sheet having single bright surface and its manufactureInfo
- Publication number
- JPH02179301A JPH02179301A JP33362788A JP33362788A JPH02179301A JP H02179301 A JPH02179301 A JP H02179301A JP 33362788 A JP33362788 A JP 33362788A JP 33362788 A JP33362788 A JP 33362788A JP H02179301 A JPH02179301 A JP H02179301A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- rolled steel
- dull
- bright
- cold
- 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
Links
- 239000010960 cold rolled steel Substances 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 9
- 238000005096 rolling process Methods 0.000 claims abstract description 20
- 239000000126 substance Substances 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 31
- 239000010959 steel Substances 0.000 description 31
- 230000007547 defect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000003796 beauty Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000005422 blasting Methods 0.000 description 3
- 238000007373 indentation Methods 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009760 electrical discharge machining Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 210000004709 eyebrow Anatomy 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/227—Surface roughening or texturing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、自動車車体外装板や家電製品外装板などに
用いる片面がブライト仕上で他面がダル仕上の冷延鋼板
およびその製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cold-rolled steel sheet with a bright finish on one side and a dull finish on the other side, which is used for automobile body exterior panels, home appliance exterior panels, etc., and a method for manufacturing the same.
（従来の技術）
冷延鋼板の用途は極めて広範であるが、特に表面の美し
さが重視される代表的な用途として、自動車外装板や家
電製品、鋼製家具などの外装板がある。これらの用途で
は、冷延鋼板（それに亜鉛などをめっきした鋼板を含む
）は塗装を施して使用されるのが普通であるが、塗装後
の美しさは冷延鋼板そのものの表面状態に影響されると
ころが大きい。(Prior Art) Cold-rolled steel sheets have an extremely wide range of uses, but representative uses where surface beauty is particularly important include exterior panels for automobiles, home appliances, steel furniture, and the like. In these applications, cold-rolled steel sheets (including steel sheets plated with zinc, etc.) are usually used after being painted, but the beauty after painting is affected by the surface condition of the cold-rolled steel sheet itself. The big thing is that
表面の美しさという点からは、鋼板はブライト仕上であ
ることが望ましい、しかし、外観の美しさは必ずしも板
の両面に要求されるとは限らない。From the viewpoint of surface beauty, it is desirable that the steel plate has a bright finish, but a beautiful appearance is not necessarily required on both sides of the plate.
むしろ、人目に触れる面が美麗であれば、他の面の美し
さは問題にされない用途の方が多い、そこで、片面だけ
をブライト仕上とし、他面はダル仕上とする鋼板が提案
されている。このように片面がブライト仕上で、他面が
ダル仕上の鋼板をディファレンシャル・ブライト鋼板と
呼ぶことがある。Rather, in many applications, as long as the surface that is visible to the public is beautiful, the beauty of other surfaces is not an issue.Therefore, a steel plate with a bright finish on one side and a dull finish on the other side has been proposed. . A steel plate like this with a bright finish on one side and a dull finish on the other side is sometimes called a differential bright steel plate.
さて、上記のディファレンシャル・ブライト鋼板は、美
しさとプレス成形性とを兼備した鋼板として有用なもの
であるが、最近になって、下記のような問題点が指摘さ
れるようになってきた。Now, the differential bright steel sheet described above is useful as a steel sheet that has both beauty and press formability, but recently, the following problems have been pointed out.
通常、ダル仕上の鋼板は、ショツトブラストや放電加工
でダル付けしたロールで圧延し、ロールの凹凸を鋼板表
面に転写する方法で製造される。Normally, dull-finished steel plates are produced by rolling with rolls that have been dulled by shot blasting or electrical discharge machining, and by transferring the unevenness of the rolls onto the surface of the steel plate.
ディファレンシャル・ブライト鋼板の場合は、片面のワ
ークロールをブライト仕上ロールとし、他面のワークロ
ールをダル仕上ロールにして圧延を行う、２ころが、こ
のようにして製造されたディファレンシャル・ブライト
鋼板を、コイルに巻き取ったり、或いは使用時に巻き戻
したりする場合に、ブライト面に微細な疵が発生するの
である。In the case of a differential bright steel plate, rolling is performed using a work roll on one side as a bright finishing roll and a work roll on the other side as a dull finishing roll. When it is wound into a coil or unwound during use, minute scratches occur on the bright surface.
このような疵は、それ自体は軽微なものであるが、最近
の鮮映性などの要求に答えてブライト面の仕上を丁寧に
する（ブライトネスを上げる）はど目立つようになり、
場合によっては冷延鋼板の商品価値を損なってしまう、
しかし、これまでに提案されたいわゆるディファレンシ
ャル・ブライト鋼板では、かかる疵の発生防止まで配慮
されてはいない。Such flaws are minor in themselves, but they become more noticeable as the bright surface is carefully finished (increased brightness) in response to recent demands for improved image clarity.
In some cases, the commercial value of cold-rolled steel sheets may be lost.
However, so-called differential bright steel plates that have been proposed so far do not take into account the prevention of such flaws.
（発明が解決しようとする課Ｂ）
この発明は、いわゆるディファレンシャル・ブライト鋼
板であって、そのブライト面に前記の疵が発生しに（い
冷延鋼板、およびその製造方法を提供することを目的と
する。(Problem B to be Solved by the Invention) The object of the present invention is to provide a so-called differential bright steel plate, which is free from the above-mentioned flaws on its bright surface, and a method for manufacturing the same. shall be.
（問題点を解決するための手段）
本発明者は、ディファレンシャル・ブライト鋼板におい
てブライト面に現れる疵の発生原因を子細に検討した結
果、以下の結論に達した。即ち、この疵は押し込み疵に
よるものであり、この疵の発生には、ダル表面の凹凸の
形状が大きく影響するのである。そこで、本発明者は、
このダル面の凹凸形状（以下、「ダルパターン」という
）を、ブライト面に班を付けない形状に改善することを
試み、本発明をなした。(Means for Solving the Problems) The inventor of the present invention has carefully studied the causes of flaws appearing on the bright surface of a differential bright steel plate, and has reached the following conclusion. That is, these flaws are due to indentation flaws, and the shape of the unevenness on the dull surface has a large influence on the occurrence of these flaws. Therefore, the inventor
The present invention was achieved by attempting to improve the uneven shape of this dull surface (hereinafter referred to as "dull pattern") to a shape that does not leave spots on the bright surface.
本願の第一発明は、下記の冷延鋼板を要旨とする。The gist of the first invention of the present application is the following cold-rolled steel sheet.
「片面がブライト面、他面がダル面の冷延鋼板であって
、上記ダル面の表面凹凸の断面曲線において中心線に対
する山の高さをｈｔ とし、平均山高さをｈとし、観測
区間における山の個数をｎとしたとき、
であることを特徴とする片面ブライト冷延鋼板１また、
第二発明は、１片面にブライト仕上のワークロールを使
用し、他面に高エネルギー密度ビームによってダル加工
を施したワークロールを使用し、しかも伸び率を０．３
％以上として調質圧延することを特ｌ！！［１！−する
上記第一発明の冷延鋼板の製造方法１を要旨とする。"It is a cold-rolled steel plate with a bright surface on one side and a dull surface on the other side. In the cross-sectional curve of the surface unevenness of the dull surface, the height of the crests from the center line is ht, the average height of the crests is h, and When the number of peaks is n, a single-sided bright cold-rolled steel sheet 1 is characterized in that:
The second invention uses a work roll with a bright finish on one side and a work roll with a dull finish on the other side using a high energy density beam, and has an elongation rate of 0.3.
% or more in temper rolling! ! [1! - The gist is a method 1 for manufacturing a cold-rolled steel sheet according to the first invention.
本発明の冷延鋼板の片面はブライト仕上である。One side of the cold rolled steel sheet of the present invention has a bright finish.
これは、従来の冷延鋼板のブライド面と本質的に変わり
はない０本発明の冷延鋼板の特徴は、ダル仕上面のダル
パターンにある。This is essentially the same as the blind surface of a conventional cold rolled steel sheet. The feature of the cold rolled steel sheet of the present invention is the dull pattern of the dull finished surface.
第１図は、本発明のダルパターンを説明するための冷延
鋼板表層部の断面拡大模式図である。FIG. 1 is an enlarged schematic cross-sectional view of the surface layer of a cold-rolled steel sheet for explaining the dull pattern of the present invention.
同図において、ダルパターンを示す断面曲線１の中心線
３（この線を基準線とし、断面曲線をｆ （ｘ）とした
とき、１／ｊ！−ｆ’ｆ （ｘ）ｄｘ−０となるような
線、なお、ｌは適当な基準長さで観測範囲の長さとすれ
ばよい）に対して、山２−１．２−２．２−３． ・
・・・２−ｉの高さをそれぞれｈｔ、ｈｔ、ｈｌ、ｈ。In the same figure, the center line 3 of the cross-sectional curve 1 showing the dull pattern (when this line is the reference line and the cross-sectional curve is f (x), 1/j!-f'f (x)dx-0 2-1.2-2.2-3.・
...The height of 2-i is ht, ht, hl, h, respectively.
とし、それらの平均をｈとする。即ち、本発明の冷延鋼
板のダル面は、このり、とｈとが、下記の条件を満たす
ものである。and their average is h. That is, the dull surface of the cold-rolled steel sheet of the present invention has a thickness and h that satisfy the following conditions.
上記の０式は、定性的に言えば、一つ一つの山（ピーク
）の高さに極端な差がないということを意味し、定量的
には、任意の一つの山２−１の高さｈｌを見た時、それ
と平均山高さ玉との差（絶対値）が、ｈの２０％以下で
なけれならないということである。Qualitatively speaking, the above formula 0 means that there is no extreme difference in the height of each mountain (peak), and quantitatively speaking, it means that there is no extreme difference in the height of each mountain (peak). When looking at hl, the difference (absolute value) between it and the average mountain height ball must be less than 20% of h.
第２図は、後に詳述する本発明の方法で製造した本発明
の冷延鋼板の代表的なダルパターンである、一方、第３
図は、従来のシッットブラスト加エロールで圧延して形
成されたダルパターンである。これらの図を対比すれば
明らかなように、従来のダルパターンは山と谷の形状、
言い換えれば山の高さ、が掻めてランダムである。この
ようなダルパターンでは、コイルに巻いた時等にブライ
ト面にダル面の突出した山が接触し、そこに応力が集中
して押し込み班を発生させる。FIG. 2 shows a typical dull pattern of the cold-rolled steel sheet of the present invention manufactured by the method of the present invention which will be described in detail later.
The figure shows a dull pattern formed by rolling with a conventional shit-blasted roller. As is clear from comparing these figures, the conventional dull pattern has a shape of peaks and valleys,
In other words, the height of the mountain is random. In such a dull pattern, when it is wound into a coil, the protruding peaks of the dull surface come into contact with the bright surface, stress is concentrated there, and a push-in area is generated.
これに対して、第２図に示すような本発明の鋼板のダル
パターンであれば、極端に突出したピークがな（、上記
のようにブライト面を疵つけることがない、なお、第２
図のパターンは山の頂部そのものが平滑であるから、−
眉、班の発生防止には好ましいのであるが、仮に山の頂
部がもっと鋭角的であっても、先の０式の条件を満たす
限り、疵発生防止の目的は達せられる。On the other hand, with the dull pattern of the steel plate of the present invention as shown in FIG.
In the pattern in the figure, the top of the mountain itself is smooth, so -
This is preferable for preventing the formation of eyebrows and spots, but even if the top of the mountain is more acute, as long as the above-mentioned condition of formula 0 is satisfied, the purpose of preventing the formation of blemishes can be achieved.
次に、本発明の冷延鋼板を製造する方法である第二の発
明について説明する。Next, a second invention, which is a method of manufacturing a cold-rolled steel sheet according to the invention, will be explained.
この製造方法は、一般の冷延鋼板の表面仕上と同じく、
調質圧延の工程でブライドロールとダルロールをワーク
ロールとして圧延を行うのであるが、ダルロールに高エ
ネルギー密度ビームでダル加工したロールを用いること
、および調質圧延の伸び率を０．３％以上とすること、
を特徴とする。This manufacturing method has the same surface finish as general cold-rolled steel sheets.
In the temper rolling process, rolling is performed using a bride roll and a dull roll as work rolls, but it is necessary to use a roll dulled with a high energy density beam as the dull roll, and to set the elongation rate of the temper rolling to 0.3% or more. to do,
It is characterized by
ロールのダル加工にレーザービームのような高エネルギ
ー密度ビームを利用すること自体は、例えば特公昭６２
−１１９２２号公報によって知られ、すでに実用化もさ
れている０本発明者は、前記０式の条件を満たすダルパ
ターンを得るのに、この高エネルギー密度ビームで加工
したロールの使用が好適であることを確認した。The use of high energy density beams such as laser beams for dulling of rolls was proposed, for example, in
The present inventor has discovered that it is suitable to use a roll processed with this high energy density beam in order to obtain a dull pattern that satisfies the conditions of the above-mentioned formula 0, which is known from Publication No. 11922 and has already been put into practical use. It was confirmed.
ロールの表面に高エネルギー密度ビーム、例えばレーザ
ービーム、のパルスを断続的に照射すれば、そのエネル
ギーによりロール表面は局部的に溶融して、規則的な微
小クレータ−が形成される。When the surface of the roll is intermittently irradiated with pulses of a high energy density beam, such as a laser beam, the roll surface is locally melted by the energy, forming regular micro-craters.
このクレータ−の凹凸が圧延の際にｗ４板表面に転写さ
れて第２図に示したようなダルパターンが作られのであ
る。かかるビームによって形成されるロール表面のクレ
ータ−の形状は極（規則的であるから、鋼板表面のダル
パターンは規則的になり、従って、その山の高さもほぼ
均一になる。The unevenness of these craters was transferred to the surface of the W4 plate during rolling, creating a dull pattern as shown in Figure 2. Since the shape of the crater on the roll surface formed by such a beam is polar (regular), the dull pattern on the surface of the steel sheet becomes regular, and the height of the peaks is therefore almost uniform.
しかも、高エネルギー密度ビームで加工したロール表面
の凹凸は、シッットブラスト加工や放電加工のロール表
面の凹凸に比較して、滑らかであり、これで圧延した場
合、第２回に示したような、山の頂部が比較的平坦なダ
ルパターンになる。このような状態は、ブライト面に疵
を付けないという目的には極めて好ましい。Moreover, the unevenness on the roll surface machined with a high energy density beam is smoother than the unevenness on the roll surface processed by shit blasting or electrical discharge machining, and when rolled with this, the unevenness on the roll surface as shown in Part 2 is smoother. The top becomes a relatively flat dull pattern. Such a state is extremely preferable for the purpose of not causing scratches on the bright surface.
本発明の方法において、調質圧延の伸び率を０．３％以
上とするのは次の理由による。In the method of the present invention, the elongation rate during temper rolling is set to 0.3% or more for the following reason.
調質圧延伸び率λは、ロール表面の粗度プロフィルに対
する鋼板表面の粗度プロフィルの転写率に大きく影響を
与えるが、λがあまりに小さければ調質圧延作業自体が
不安定となって鋼板表面へのダル目付けが困難となる０
本発明者等の実験によれば、調質圧延伸び率が０．３％
以上であれば、ロールの凹凸プロフィルが効率良く鋼板
面に転写され、望ましい表面状態が得られる。The temper rolling elongation rate λ greatly affects the transfer rate of the roughness profile of the steel plate surface to the roughness profile of the roll surface, but if λ is too small, the temper rolling operation itself becomes unstable and 0, which makes it difficult to dull the weight of
According to experiments conducted by the present inventors, the temper rolling elongation rate is 0.3%.
If this is the case, the uneven profile of the roll will be efficiently transferred to the surface of the steel plate, and a desirable surface condition will be obtained.
片面にブライドロールを、他面に高エネルギー密度ビー
ム加工のダルロールを使用し、上記の条件で調質圧延を
施して製造した冷延鋼板は、必要ならば、常法によって
亜鉛その他のめっきを施す。Cold-rolled steel sheets produced by temper rolling under the above conditions using a blind roll on one side and a dull roll processed with high energy density beams on the other side can be plated with zinc or other metals by a conventional method if necessary. .
母材の冷延鋼板が、先の０式の条件を満たしていれば、
これにめっきした鋼板も０式の条件を満足する０本願第
一発明の「冷延鋼板」は、このようにめっきを施した鋼
板をも含んでいる。If the base material cold-rolled steel plate satisfies the conditions of formula 0 above,
The plated steel plate also satisfies the conditions of formula 0. The "cold rolled steel plate" of the first invention of the present application also includes steel plates plated in this manner.
以下、実施例によって、本発明の効果を具体的に説明す
る。EXAMPLES Hereinafter, the effects of the present invention will be specifically explained with reference to Examples.
（実施例）
ＪＩＳ ５ＰＣＣ相当の冷延鋼板を焼鈍した後、下記の
条件で調質圧延を行い、通常の操業条件でコイルに巻き
、その時の巻き締まり疵と押し込み疵の発生状況を調査
した。(Example) After annealing a cold-rolled steel sheet equivalent to JIS 5PCC, it was subjected to temper rolling under the following conditions and wound into a coil under normal operating conditions, and the occurrence of tightening defects and push-in defects at that time was investigated.
１、ブライト面のワークロール： ＃６００”の砥石で
研磨仕上。1. Bright surface work roll: Polished with #600” whetstone.
ｉｉ、ダル面のワークロールニ
ジ舊ットブラスト加エロールまたはレーザービーム加工
ロールで、加工条件を変えて、第の値を調整した。ii. The first value was adjusted by changing the processing conditions using a dull-faced work roll, a Niji-blasting roll, or a laser beam processing roll.
ｉｉｉ、ｉｌｌｌｌ延圧延伸（λ）：Ｏ，Ｓ％疵光発生
評価は、第１表記載のコイルを各５０個づつ製造し、最
終検査ラインで疵発生状況を調べ、各５０個のコイルに
対して疵の発生した部分の重量の全５０コイルの重量に
対する比（重量比）で表した。結果を第１表および第４
図、第５図にまとめて示す。iii. illll rolling (λ): O, S% To evaluate the occurrence of defects, 50 of each of the coils listed in Table 1 were manufactured, and the state of occurrence of defects was examined on the final inspection line. On the other hand, it was expressed as a ratio (weight ratio) of the weight of the part where the flaw occurred to the weight of all 50 coils. The results are shown in Tables 1 and 4.
The figures are summarized in Fig. 5.
なお、第１表の 第 １ 表 で測定した。In addition, Table 1 Table 1 It was measured with
（以下、余白）
（以下、余白）
第１表に示すとおり、本発明の条件を満たしている試験
漱３．４の例では巻き締まり疵および押し込み疵の発生
がきわめて少ない、これらの例では、
あった、一方、従来のショットダルロールで調質圧延を
行った例（隘２）では、その平均値は０，６５であった
。(hereinafter referred to as margin) (hereinafter referred to as margin) As shown in Table 1, in the examples of test slag 3.4 that meet the conditions of the present invention, the occurrence of tightness flaws and indentation flaws is extremely small. On the other hand, in the example (No. 2) in which temper rolling was performed using a conventional shot dull roll, the average value was 0.65.
（発明の効果）
第４図および第５図に示したように、本発明の片面ブラ
イト鋼板（ディファレンシャル・ブライト鋼板）は、巻
き締まり疵の発生が殆どなく、しかも押し込み疵の発生
も少ない、かかる本発明の鋼板は、前記の本発明の方法
で比較的容易に製造できるものであり、冷延ｍ板の商品
価値の向上と製造歩留りの向上に大きく寄与する。(Effects of the Invention) As shown in FIGS. 4 and 5, the single-sided bright steel sheet (differential bright steel sheet) of the present invention has almost no occurrence of winding tightness flaws, and less occurrence of push-in flaws. The steel plate of the present invention can be manufactured relatively easily by the method of the present invention described above, and greatly contributes to improving the commercial value and manufacturing yield of cold-rolled m-plates.
【図面の簡単な説明】
第１図は、ダルパターンを説明するｗ４板表面部の断面
模式図、
第２図は、本発明鋼板のダルパターンを示す第１図と同
様の模式図、
第３図は、従来の鋼板のダルパターンを示す第２図と同
様の模式図、である。
第４図は、両面ブライト鋼板、従来の片面ブライト鋼板
および本発明の片面ブライト鋼板の巻き締まり疵発生率
を示す図、
第５図は、調質圧延にレーザーダルロールとショットダ
ルロールを使用した場合の押し込み疵発生率を示す図、
である。[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a schematic cross-sectional view of the surface part of the W4 plate explaining the dull pattern, Fig. 2 is a schematic diagram similar to Fig. 1 showing the dull pattern of the steel plate of the present invention, and Fig. 3 The figure is a schematic diagram similar to FIG. 2 showing the dull pattern of a conventional steel plate. Figure 4 is a diagram showing the incidence of rolling compaction defects in double-sided bright steel plates, conventional single-sided bright steel plates, and single-sided bright steel plates of the present invention. Figure 5 is a diagram showing the incidence of rolling compaction defects in double-sided bright steel plates, conventional single-sided bright steel plates, and single-sided bright steel plates of the present invention. A diagram showing the incidence of indentation flaws in cases where
It is.
Claims (2)
って、上記ダル面の表面凹凸の断面曲線において中心線
に対する山の高さをｈ＿ｉとし、平均山高さを＠ｈ＠と
し、観測区間における山の個数をｎとしたとき、 ▲数式、化学式、表等があります▼ であることを特徴とする片面ブライト冷延鋼板。(1) A cold-rolled steel sheet with a bright surface on one side and a dull surface on the other side, where in the cross-sectional curve of the surface unevenness of the dull surface, the height of the peaks with respect to the center line is h_i, and the average peak height is @h@. , where the number of peaks in the observation interval is n, ▲There are mathematical formulas, chemical formulas, tables, etc.▼ A single-sided bright cold-rolled steel sheet.
面に高エネルギー密度ビームによってダル加工を施した
ワークロールを使用し、しかも伸び率を０．３％以上と
して調質圧延することを特徴とする特許請求の範囲第１
項記載の冷延鋼板の製造方法。(2) The feature is that a work roll with a bright finish is used on one side, and a work roll that is dulled by a high-energy density beam is used on the other side, and temper rolling is performed with an elongation rate of 0.3% or more. Claim 1:
A method for producing a cold-rolled steel sheet as described in .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33362788A JPH0673683B2 (en) | 1988-12-28 | 1988-12-28 | Single-sided bright cold-rolled steel sheet and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33362788A JPH0673683B2 (en) | 1988-12-28 | 1988-12-28 | Single-sided bright cold-rolled steel sheet and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02179301A true JPH02179301A (en) | 1990-07-12 |
| JPH0673683B2 JPH0673683B2 (en) | 1994-09-21 |
Family
ID=18268163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33362788A Expired - Lifetime JPH0673683B2 (en) | 1988-12-28 | 1988-12-28 | Single-sided bright cold-rolled steel sheet and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0673683B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2709689A1 (en) * | 1993-09-09 | 1995-03-17 | Lorraine Laminage | Process for the surface forming of a metal sheet, rolling-mill rolls for implementing the process, and sheet obtained |
-
1988
- 1988-12-28 JP JP33362788A patent/JPH0673683B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2709689A1 (en) * | 1993-09-09 | 1995-03-17 | Lorraine Laminage | Process for the surface forming of a metal sheet, rolling-mill rolls for implementing the process, and sheet obtained |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0673683B2 (en) | 1994-09-21 |
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