JPH01127104A - Hot rolled steel sheet having high roughness and brightness and its manufacture - Google Patents
Hot rolled steel sheet having high roughness and brightness and its manufactureInfo
- Publication number
- JPH01127104A JPH01127104A JP29382987A JP29382987A JPH01127104A JP H01127104 A JPH01127104 A JP H01127104A JP 29382987 A JP29382987 A JP 29382987A JP 29382987 A JP29382987 A JP 29382987A JP H01127104 A JPH01127104 A JP H01127104A
- Authority
- JP
- Japan
- Prior art keywords
- rolled steel
- valley
- steel sheet
- roughness
- average
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 54
- 239000010959 steel Substances 0.000 title claims abstract description 54
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 238000005096 rolling process Methods 0.000 claims abstract description 23
- 239000003973 paint Substances 0.000 abstract description 13
- 238000010422 painting Methods 0.000 abstract description 4
- 239000010953 base metal Substances 0.000 abstract description 2
- 230000000630 rising effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 13
- 238000005422 blasting Methods 0.000 description 12
- 230000003746 surface roughness Effects 0.000 description 11
- 238000005554 pickling Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000012611 container material Substances 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229920000298 Cellophane Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- 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〕
本発明は、優れた塗装密着性及び塗装後の鮮映性が得ら
れる高粗度・高鮮映性熱延鋼板及びそのの製造方法に関
する。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a high-roughness, high-definition hot-rolled steel sheet that provides excellent paint adhesion and post-paint clarity, and a method for producing the same. .
熱延鋼帯または熱延鋼板（以下熱延鋼板と称する）は、
熱間圧延後、通常、酸洗もしくはショツトブラスト等に
より脱スケールが行われる。Hot-rolled steel strip or hot-rolled steel plate (hereinafter referred to as hot-rolled steel plate) is
After hot rolling, descaling is usually performed by pickling or shot blasting.
酸洗は硫酸、塩酸などの酸により化学的に脱スケールを
行うもので、この場合、酸洗後の鋼板表面の粗度は中心
性平均粗さＲａで２μｍ未満となる。Pickling is a process of chemically descaling using an acid such as sulfuric acid or hydrochloric acid. In this case, the roughness of the surface of the steel plate after pickling is less than 2 μm in central average roughness Ra.
またショツトブラストは鋼球などのショツト粒を鋼板表
面に投射して脱スケールを行うもので、この場合に得ら
れる表面粗度Ｒａは８μｍまで大きくすることが可能と
なる。従ってコンテナ材。Further, shot blasting is a method of descaling by projecting shot particles such as steel balls onto the surface of a steel plate, and in this case, the surface roughness Ra obtained can be increased to 8 μm. Hence the container material.
配電盤材などの熱延鋼板を塗装して使用する場合には酸
洗材より表面粗度が大きく、そのために塗装密着性のよ
いショツトブラスト材が多く用いられる。When hot-rolled steel sheets, such as switchboard materials, are painted and used, shot blasting materials, which have a higher surface roughness than pickled materials and have better paint adhesion, are often used.
しかしながら、酸洗により脱スケールしたままの熱延鋼
板はその表面肌は表面粗度Ｒａが２μｍ未満と低いため
塗装密着性が非常に悪く、コンテナ材等には使用できな
かった。However, the hot-rolled steel sheet that has been descaled by pickling has a low surface roughness Ra of less than 2 μm, and therefore has very poor coating adhesion and cannot be used as a container material or the like.
一方、ショツトブラストによる脱スケールには以下のよ
うにまた解決すべき種々の問題点が残されている。まず
、ショツトブラスト後の熱延鋼板表面にはショツト粒や
グリッド、あるいは酸化スケール等が残留することがあ
り、場合によってはこれらがそのまま表面汚れとなって
残り、またこの表面に塗装を施しても塗装密着性が悪く
なることからショツトブラスト後にさらに酸洗等の処理
が必要となる。On the other hand, descaling by shot blasting still has various problems to be solved as described below. First, shot grains, grids, or oxidized scales may remain on the surface of a hot rolled steel sheet after shot blasting, and in some cases these may remain as surface stains, and even if this surface is painted. Since paint adhesion deteriorates, additional treatment such as pickling is required after shot blasting.
また、熱延鋼板を出荷するに際して、−ｍにスキンパス
ミルによる形状矯正を行っているが、この際に塗装密着
性を良好とするショツトブラストの高粗度が潰れてしま
うという問題がある。Furthermore, when shipping hot rolled steel sheets, -m is subjected to shape correction using a skin pass mill, but there is a problem in that the high roughness of shot blasting, which improves paint adhesion, is destroyed at this time.
さらに、鋼板表面に投射するショツト粒は回収して循環
使用するためショツト粒は使用するにつれて摩耗、細粒
化してゆく結果、表面粗度も変化してゆくので、安定し
た状態の表面粗度が得られないという問題もある。Furthermore, since the shot particles projected onto the surface of the steel plate are collected and recycled, the shot particles wear out and become finer as they are used, and as a result, the surface roughness changes, so the stable surface roughness changes. There is also the problem of not being able to get it.
そして、ショツトブラスト鋼板においては、その表面の
凹凸パターンは第２図に示すように、急峻で且つ不規則
であるため、塗装後の表面は散乱光が多（鮮映性の良さ
は望むべくもない、という問題点があった。As shown in Figure 2, the shot-blasted steel plate has a steep and irregular uneven pattern on its surface, so there is a lot of scattered light on the surface after painting. The problem was that there was no.
この発明は、このような従来の問題点にかんがみてなさ
れたものであって、表面粗度Ｒａを２〜８μｍとし、Ｓ
ｍとＤとの関係を０．７≦Ｓ ｍ ／ Ｄ≦２．０とし
た熱延鋼板とし、且つこの鋼板を所定の処理を施したレ
ーザーダルロールにより圧延する製造方法とすることに
より、上記問題点を解決することを目的としている。This invention was made in view of such conventional problems, and the surface roughness Ra is set to 2 to 8 μm, and S
By using a hot rolled steel plate with a relationship between m and D of 0.7≦S m /D≦2.0, and rolling this steel plate with a laser dull roll subjected to a predetermined treatment, the above-mentioned The purpose is to solve problems.
この発明は、表面の中心線平均粗さＲａが２〜８μｍの
範囲内に、あり、且つこの表面の微視的形状が平坦な山
頂面を有する山部と、この山部の周囲の全部または一部
を囲繞するように形成された溝状の谷部と、前記各山部
の間であって且つ谷部の外側にその谷部の底よりも高（
且つ山部の山頂面より低く形成された中間平坦部とによ
って構成され、しかも隣り合う山部の平均中心間距離を
Ｓｍ、谷部の外縁の平均直径をＤとしたとき、ＳｍとＤ
とが０．７≦Ｓ ｍ ／ Ｄ≦２．０なる関係を有する
高粗度・高鮮映性熱延鋼板を第１の発明とし、この鋼板
を製造する方法の発明として、表面の中心線平均粗さＲ
ａが３〜１５μｍの範囲内にあり、且つこの表面にレー
ザーパルスビームで形成された微小クレータが所定のパ
ターンで規則正しく配列されたダルロールを使用し、圧
下率０．５〜３．０％にて圧延することにより、前記高
粗度・高鮮映性熱延鋼板を製造する方法を第２の発明と
して提供するものである。This invention provides a crest having a surface centerline average roughness Ra within a range of 2 to 8 μm and a crest having a flat microscopic shape, and the entire or surrounding area of the ridge. A groove-shaped valley formed so as to surround a portion of the valley and the above-mentioned peaks, and located outside the valley at a height (higher than the bottom of the valley).
and an intermediate flat part formed lower than the top surface of the mountain, and when the average distance between the centers of adjacent mountain parts is Sm and the average diameter of the outer edge of the valley is D, Sm and D
A first invention is a high-roughness, high-definition hot-rolled steel sheet having a relationship of 0.7≦S m / D≦2.0, and as an invention of a method for manufacturing this steel sheet, the surface centerline Average roughness R
A is in the range of 3 to 15 μm, and using a dull roll on whose surface micro craters formed by a laser pulse beam are regularly arranged in a predetermined pattern, at a rolling reduction rate of 0.5 to 3.0%. A second invention provides a method of manufacturing the hot-rolled steel sheet with high roughness and high definition by rolling.
表面を平滑に仕上げたワークロールを定速回転させなが
らレーザーパルスビームを照射してその表面に規則的に
連続した点状に溶融した微小クレータを形成する。この
クレータの周囲には溶融した母材金属が盛り上がってフ
ランジが形成される。A work roll with a smooth surface is rotated at a constant speed and irradiated with a laser pulse beam to form micro-craters in the shape of regularly continuous dots on the surface. The molten base metal bulges around this crater to form a flange.
また隣り合うクレータのフランジ間の部分は平滑面のま
まである。ここで、ロールの回転方向にはロールの回転
速度と関連づけてレーザーパルスのパルス周期を制御し
、ロールの軸方向にはロールが１回転する毎にレーザー
照射位置の移動ビ・ソチを制御することにより、クレー
タの平均中心間距離をＳｍとし、レーザー出力及び照射
時間等を調整してフランジ外径をＤとしたとき、Ｓｍと
Ｄとの関係を０．７≦Ｓ ｍ ／ Ｄ≦２．０とし、且
つ表面粗度Ｒａを３〜１５μｍの範囲とすることができ
る。Furthermore, the area between the flanges of adjacent craters remains a smooth surface. Here, in the rotational direction of the roll, the pulse period of the laser pulse is controlled in relation to the rotational speed of the roll, and in the axial direction of the roll, the movement of the laser irradiation position is controlled every time the roll rotates once. Accordingly, when the average distance between the centers of the craters is Sm, and the outer diameter of the flange is D by adjusting the laser output and irradiation time, the relationship between Sm and D is 0.7≦S m / D≦2.0. and the surface roughness Ra can be in the range of 3 to 15 μm.
このように表面粗度を形成したダルロールでスキンバス
圧延を施した酸洗後の熱延鋼板表面には、クレータのフ
ランジで押圧されて生じた谷部の内側には鋼板の金属が
流込んで山頂部が形成される。The surface of the hot-rolled steel sheet after pickling has been subjected to skin bath rolling with dull rolls that have formed a surface roughness in this way, and the metal of the steel sheet flows into the inside of the valleys created by being pressed by the flanges of the crater. A mountain top is formed.
一方、ロールの平滑面はそのまま鋼板の平滑部となり、
この部分は前記谷部の底よりも高く山頂部よりも低い中
間平坦部として形成される。そして、このような山部と
谷部とは、上記のごとくダルロールのクレータ配列形成
条件を制御し、圧下率を０．５％〜３．０％とすること
によって、このロールでスキンパス圧延を施された鋼板
の中心線平均粗さＲａを２〜８μｍの範囲とすることが
できる。On the other hand, the smooth surface of the roll becomes the smooth part of the steel plate,
This portion is formed as an intermediate flat portion higher than the bottom of the valley and lower than the peak. These peaks and valleys can be formed by skin pass rolling with these rolls by controlling the crater array formation conditions of the dull rolls and setting the rolling reduction to 0.5% to 3.0% as described above. The center line average roughness Ra of the steel plate obtained can be in the range of 2 to 8 μm.
従って、この熱延鋼板の表面は平坦部が多く且つ規則正
しい配列となっているので、従来のショツトブラスト鋼
板のような高粗度が得られて塗装密着性及び塗装後の鮮
映性に優れた表面粗さを有する高粗度・高鮮映性熱延鋼
板とすることができる。Therefore, the surface of this hot-rolled steel sheet has many flat parts and is arranged in a regular manner, so it has a high roughness similar to that of conventional shot-blasted steel sheets, and has excellent paint adhesion and image clarity after painting. A hot-rolled steel sheet with high surface roughness and high sharpness can be obtained.
以下、この発明を図面に基づいて説明する。第１図及び
第３〜８図は本発明に係る実施例の説明図である（第２
図は従来例の鋼板であるが、同部分の実施例との対比上
、本発明の鋼板を示す第１図に並示したものである）。The present invention will be explained below based on the drawings. FIG. 1 and FIGS. 3 to 8 are explanatory diagrams of embodiments according to the present invention (Second
Although the figure shows a conventional steel plate, it is also shown in Fig. 1, which shows the steel plate of the present invention, for comparison with the example of the same part).
先ず、本発明に係る熱延鋼板を製造するためのスキンバ
ス圧延用のダルロールの表面粗度形成方法について説明
する。First, a method for forming the surface roughness of a dull roll for skin bath rolling for producing a hot rolled steel sheet according to the present invention will be described.
表面を研磨加工により平滑に仕上げたワークロール表面
に、レーザービーム等の高密度エネルギ源を、上記ロー
ルを定速度で回転させながらパルス状に照射して規則的
に連続した点状に溶融した微小クレータを形成する。A high-density energy source such as a laser beam is irradiated onto the surface of a work roll, whose surface has been smoothed by polishing, in a pulsed manner while the roll is rotating at a constant speed. Form a crater.
第３図（ａ）は、この点状に溶融されたロール表面の拡
大断面図であって、１はロール８表面に形成された微小
クレータであり、このクレータ１の周囲には溶融した母
材金属がロール表面よりも盛り上がってフランジ２が形
成される。また隣り合うクレータのフランジ２間の部分
は、もとのロールＲの研磨面のままの平滑部３である。FIG. 3(a) is an enlarged sectional view of the dot-shaped melted roll surface, and 1 is a micro crater formed on the roll 8 surface, and around this crater 1 there is a melted base material. The metal rises above the roll surface to form a flange 2. Further, the portion between the flanges 2 of adjacent craters is a smooth portion 3 that remains the polished surface of the original roll R.
ここで、隣り合うクレータ１間の距離は、ロールＲの回
転方向にはロールＲの回転速度と関連づけてレーザーパ
ルスのパルス周期を制御することにより、またロールＲ
の胴長方向に対してはロールＲが１回転する毎にレーザ
ーの照射位置をロールＲの軸方向へ移動させるピッチを
制御することによって調整し、その平均中心間距離Ｓｍ
を所定値とすることができる。またクレータ１の大きさ
及びフランジ２の外径りの大きさはレーザービームの照
射時間及びレーザー出力等を変えることにより制御でき
る。Here, the distance between adjacent craters 1 can be determined by controlling the pulse period of the laser pulse in relation to the rotation speed of the roll R in the rotation direction of the roll R, and by controlling the pulse period of the laser pulse in relation to the rotation speed of the roll R.
The direction of the body length is adjusted by controlling the pitch of moving the laser irradiation position in the axial direction of the roll R every time the roll R rotates, and the average center distance Sm
can be set to a predetermined value. Further, the size of the crater 1 and the size of the outer diameter of the flange 2 can be controlled by changing the laser beam irradiation time, laser output, etc.
次に、このように表面をダル加工したワークロールＲを
上下一対としてスキンバスミルに組込んで酸洗後の熱延
鋼板Ｓにスキンパス圧延を施す場合の作用について説明
する。Next, a description will be given of the operation when a pair of upper and lower work rolls R whose surfaces have been dulled in this manner are assembled in a skin bath mill and skin pass rolling is performed on a pickled hot rolled steel sheet S.
このスキンバス圧延過程における綱板Ｓの挙動を微視的
に拡大すると、第３図ｆａｎ、 （ｂ）に示すように、
ロール８表面のクレータ１周縁のほぼ均一な高さを有す
るフランジ２が鋼板Ｓの表面に強い圧力で押付けられる
と、ロールＲの材質より軟質な鋼板Ｓの表面近傍で素材
の局所的塑性流動が生じ、ロールＲのクレータ１内へ鋼
板Ｓの金属が流込んで粗面が形成される。すなわち、ク
レータ１内へ流込んだ金属は鋼板Ｓ表面の山頂部４とな
り、ロールＲの平滑部３はそのまま鋼板Ｓ表面の平坦部
５を形成して山頂部４はこの平坦部５より高くなる。従
ってスキンバス圧延後のｗ４仮Ｓの表面における微視的
形状は第３図（ｂ）及び第１図にその断面で示すように
、山頂部４を有する山部６とその周囲に形成された環状
溝の谷部７と、隣り合う山部６の間であって且つ谷部７
の外側にその谷部７の底よりも高く且つ山頂部４より低
く形成された中間平坦部５とによって構成され、これら
各部がほぼ等間隔に配列されたパターンを形成する。When the behavior of the steel plate S during this skin bath rolling process is microscopically enlarged, as shown in Fig. 3 (b),
When the flange 2, which has a substantially uniform height around the periphery of the crater 1 on the surface of the roll 8, is pressed against the surface of the steel plate S with strong pressure, local plastic flow of the material occurs near the surface of the steel plate S, which is softer than the material of the roll R. The metal of the steel sheet S flows into the crater 1 of the roll R, forming a rough surface. That is, the metal that has flowed into the crater 1 becomes the peak 4 on the surface of the steel plate S, and the smooth part 3 of the roll R directly forms the flat part 5 on the surface of the steel plate S, and the peak 4 becomes higher than this flat part 5. . Therefore, the microscopic shape on the surface of the W4 provisional S after skin bath rolling is as shown in the cross section in FIG. 3(b) and FIG. Between the valley part 7 of the annular groove and the adjacent peak part 6 and the valley part 7
and an intermediate flat part 5 formed on the outside thereof, which is higher than the bottom of the valley part 7 and lower than the peak part 4, and these parts form a pattern arranged at approximately equal intervals.
ここで、山部６の径をｄ、山頂部４の平坦部５からの高
さをり９、谷部７の平坦部５からの深さをり、とすると
、鋼板Ｓ表面の品質（特性）は、これらの表面構成因子
の最適な組合せにより決定される。Here, if the diameter of the crest 6 is d, the height of the crest 4 from the flat part 5 is 9, and the depth of the valley 7 from the flat part 5 is d, then the quality (characteristics) of the surface of the steel plate S is is determined by the optimal combination of surface constituent factors.
第４図に圧下率とダル回転写率との関係を示し、第５図
に圧下率と機械的性質（伸び）の関係を示す。これらの
図に示した関係より圧下率が０．５％未満では転写率が
低く所定のダル目が得られず且つスキンパスによる形状
矯正ができないこと、また圧下率が３％を超えると伸び
Ｅｌが３４％以下となることが示され、従って機械的性
質を損なわず、且つ高塗装密着性、高鮮映性を発揮する
Ｒａ２μｍ〜８μｍのダル目を得る適当な圧下率は０゜
５〜３．０％であることがわかる。FIG. 4 shows the relationship between the rolling reduction rate and the dull transfer rate, and FIG. 5 shows the relationship between the rolling reduction rate and mechanical properties (elongation). From the relationships shown in these figures, if the rolling reduction rate is less than 0.5%, the transfer rate will be low and it will not be possible to obtain the desired dowel, and the shape cannot be corrected by a skin pass.If the rolling reduction rate exceeds 3%, the elongation El will be too low. 34% or less. Therefore, the appropriate rolling reduction ratio to obtain a dull roughness of Ra 2 μm to 8 μm that does not impair mechanical properties and exhibits high paint adhesion and high image clarity is 0°5 to 3. It can be seen that it is 0%.
次に、隣り合う山部６の平均中心間距離Ｓｍと谷部７の
外径りによるＳ ｍ ／ Ｄと塗装密着性との関係につ
いての測定結果を第６図に示す。図において横軸にＳ
ｍ ／ Ｄの値を、縦軸に塗装密着度を示す。ここで、
塗装密着度は、一般に行われるセロファンテープによる
剥離テストで評価したものであって、図においては表面
粗度Ｒａ ７．８μｍのショツトブラスト材Ｐ（−点鎖
線で示す）と本発明による熱延鋼板Ｓとを比較した。こ
れにより、Ｓ ｍ ／ Ｄが０．７を超え且つ２．０以
下の領域で密着性は同等もしくはそれ以上に優れている
ことがわかる。Next, FIG. 6 shows the measurement results regarding the relationship between the average center-to-center distance Sm of adjacent peaks 6 and the outer diameter of the valleys 7, S m /D, and paint adhesion. In the figure, the horizontal axis shows S.
The value of m/D is shown on the vertical axis, and the degree of paint adhesion is shown. here,
The degree of paint adhesion was evaluated by a peeling test using a cellophane tape, which is commonly performed. A comparison was made with S. This shows that the adhesion is equivalent to or even better in a region where S m /D exceeds 0.7 and is 2.0 or less.
第７図は、塗装後の鮮映性を光沢度で代用して調査した
結果を示したもので、横軸はＳ ｍ ／ Ｄ、縦軸は光
沢度（−反射受光１ｘ １００／投射光量）をとったも
のである。図中、Ｐはショツトブラスト材、ｑは酸洗材
を、実線は本発明によるレーザーダル材を示す。この図
からＳ ｍ ／ Ｄが０．７以上であればショツトブラ
スト材は勿論、酸洗材よりも光沢度が優れていることが
わかる。Figure 7 shows the results of an investigation using glossiness as a substitute for image clarity after painting, where the horizontal axis is S m / D and the vertical axis is glossiness (- reflected received light 1 x 100/projected light amount). This is the one taken. In the figure, P indicates shot blasting material, q indicates pickling material, and the solid line indicates laser dull material according to the present invention. From this figure, it can be seen that when S m /D is 0.7 or more, the gloss is superior not only to shot blasting materials but also to pickling materials.
以上により、本発明においてＳ ｍ ／ Ｄを０．７≦
Ｓ ｍ ／ Ｄ≦２．０と限定するものである。As described above, in the present invention, S m /D is set to 0.7≦
It is limited to S m /D≦2.0.
以上、本発明では熱延鋼板の微視的形状を規制したが、
これのみでは不十分であり、鋼板の粗さ自体も規制しな
ければならない。すなわち、Ｒａ２、 Ｏｐ ｍ未満で
はＳ ｍ ／ Ｄが０．７〜２．０の範囲内にあっても
酸洗材なみの光沢度を確保できず、またＲ ａ ８．
Ｏを超えると塗装密着性がショツトブラスト材を下まわ
ることから、鋼板の粗さはＲａ ２゜０〜８．０μｍの
範囲とすべきである。As described above, in the present invention, the microscopic shape of the hot rolled steel sheet is regulated,
This alone is not sufficient, and the roughness of the steel sheet itself must also be regulated. That is, if Ra2, Opm is less than 8.0, even if Sm/D is within the range of 0.7 to 2.0, it will not be possible to secure the same level of gloss as a pickling material.
If the roughness exceeds 0, the coating adhesion will be lower than that of shot blasting material, so the roughness of the steel plate should be in the range of Ra 2.0 to 8.0 μm.
以下に実際例を示す。A practical example is shown below.
高密度エネルギ源としてレーザーパルスビームを使用し
てＲａ ３〜１５ ａｍ （ＲＭＡＸ １０〜６０μｍ
） 、Ｓｍ／Ｄ＝０．７〜２．０の範囲内にある表面粗
度のロールを複数本作成し、これを用いて酸洗後の熱延
鋼板を圧下率０．５〜３％の範囲でスキンパスを行った
。このとき得られた鋼板の表面形態は、山頂部４の直径
が１６０〜８００μｍ１谷部のＤが２００〜１０００μ
ｍ、ｈ、が２０〜８０ｕｍ、ｈｚが１５〜６０１Ｉｍで
あった。Ra 3-15 am (RMAX 10-60 μm
), a plurality of rolls with a surface roughness within the range of Sm/D = 0.7 to 2.0 were created, and using these rolls, the hot rolled steel plate after pickling was rolled at a rolling reduction rate of 0.5 to 3%. I did a skin pass at range. The surface morphology of the steel plate obtained at this time is such that the diameter of the peak portion 4 is 160 to 800 μm, and the D of the valley portion is 200 to 1000 μm.
m, h, and hz were 20 to 80 um and 15 to 601 Im.
このようにして得られた熱延鋼板はいずれも塗装密着性
及び鮮映性に優れ、また表面の汚れもな（形状も良好で
あった。All of the hot-rolled steel sheets thus obtained had excellent paint adhesion and sharpness, and had no surface stains (and had a good shape).
以上説明したように、この発明によれば以下のような効
果を得ることができる。As explained above, according to the present invention, the following effects can be obtained.
（１）熱延鋼板の表面は平坦部の多い規則的な凹凸パタ
ーンを存するので、塗装密着性と塗装後の鮮映性に優れ
る。(1) Since the surface of the hot-rolled steel sheet has a regular uneven pattern with many flat areas, it has excellent coating adhesion and image clarity after coating.
（２）ショツトブラストに依らず高粗度を付与するので
ショツト粒などの残留はなくなり、表面の清浄な熱延綱
板が得られる。(2) High roughness is imparted without relying on shot blasting, so there is no residual shot grain, and a hot-rolled steel sheet with a clean surface can be obtained.
（３）粗度の付与と形状矯正をスキンパスミルで同時に
行えるので、工程短縮２製造エネルギの節減等が図れる
。(3) Since roughness can be imparted and shape correction can be performed at the same time using a skin pass mill, it is possible to shorten the process and save manufacturing energy.
第１図は本発明に係る熱延鋼板表面の拡大断面図、第２
図はショツトブラストによる鋼板表面の拡大断面図、第
３図（ａ）は本発明に係るレーザーダルロール表面の拡
大断面図、同図（ｂ）は同図（ａｌのレーザーダルロー
ルで圧延した鋼板表面の拡大断面図、第４図は転写率と
圧下率との関係を示すグラフ、第５図は圧下率と鋼板の
伸び（％）との関係を示すグラフ、第６図は塗装密着度
とＳ ｍ ／ Ｄとの関係を示すグラフ、第７図は塗装
後の鋼板の鮮映性を光沢度とＳ ｍ ／ Ｄの関係で示
したグラフである。
１・・・・・・クレータ、２・・・・・・フランジ部、
３・・・・・・平坦部、４・・・・・・山頂部、５・・
・・・・中間平坦部、６・・・・・・山部、７・・・・
・・谷部。
特許出願人 川崎製鉄株式会社
代理人 弁理士 森 哲 也
代理人 弁理士 内 藤 嘉 昭
代理人 弁理士 清 水 正
第４図
（ｏ／：Ｊ
第５図
Ｃ如
圧Ｔ＋Ｃ％］
第６図
第７図FIG. 1 is an enlarged sectional view of the surface of a hot rolled steel sheet according to the present invention, and FIG.
The figure is an enlarged sectional view of the surface of a steel plate by shot blasting, FIG. 3(a) is an enlarged sectional view of the surface of a laser dull roll according to the present invention, and FIG. An enlarged sectional view of the surface, Figure 4 is a graph showing the relationship between transfer rate and rolling reduction rate, Figure 5 is a graph showing the relationship between rolling rate and elongation (%) of the steel plate, and Figure 6 is a graph showing the relationship between paint adhesion and rolling reduction rate. A graph showing the relationship between S m / D. Figure 7 is a graph showing the sharpness of a painted steel plate in terms of the relationship between gloss and S m / D. 1... Crater, 2 ...Flange part,
3...Flat area, 4...Mountain top, 5...
...Middle flat part, 6...Mountain part, 7...
...Tanibe. Patent Applicant Kawasaki Steel Co., Ltd. Agent Patent Attorney Tetsuya Mori Patent Attorney Yoshiaki Naito Agent Patent Attorney Tadashi Shimizu Figure 4 (o/:J Figure 5 C Pressure T+C%) Figure 6 Figure 7
Claims (2)
にあり、且つこの表面の微視的形状が平坦な山頂面を有
する山部と、この山部の周囲の全部または一部を囲繞す
るように形成された溝状の谷部と、前記各山部の間であ
って且つ谷部の外側にその谷部の底よりも高く且つ山部
の山頂面より低く形成された中間平坦部とによって構成
され、しかも隣り合う山部の平均中心間距離をＳｍ、谷
部の外縁の平均直径をＤとしたとき、ＳｍとＤとが０．
７≦Ｓｍ／Ｄ≦２．０なる関係を有することを特徴とす
る高粗度・高鮮映性熱延鋼板。(1) A crest having a surface center line average roughness Ra within the range of 2 to 8 μm and a top surface with a flat microscopic shape, and all or part of the surrounding area of this crest. and a groove-shaped valley formed to surround the above-mentioned peaks, and an intermediate space formed outside the valley and higher than the bottom of the valley and lower than the top surface of the peak. Sm is the average distance between the centers of adjacent peaks, and D is the average diameter of the outer edges of the valleys, and Sm and D are 0.
A hot-rolled steel sheet with high roughness and high sharpness, characterized by having a relationship of 7≦Sm/D≦2.0.
内にあり、且つこの表面にレーザーパルスビームで形成
された微小クレータが所定のパターンで規則正しく配列
されたダルロールを使用し、圧下率０．５〜３．０％に
て圧延することにより、表面の中心線平均粗さＲａが２
〜８μｍの範囲内にあり、且つこの表面の微視的形状が
平坦な山頂面を有する山部と、この山部の周囲の全部ま
たは一部を囲繞するように形成された溝状の谷部と、前
記各山部の間であって且つ谷部の外側にその谷部の底よ
りも高く且つ山部の山頂面より低く形成された中間平坦
部とによって構成され、しかも隣り合う山部の平均中心
間距離をＳｍ、谷部の外縁の平均直径をＤとしたとき、
ＳｍとＤとが０．７≦Ｓｍ／Ｄ≦２．０なる関係を有す
る高粗度・高鮮映性熱延鋼板の製造方法。(2) Using a dull roll whose surface center line average roughness Ra is within the range of 3 to 15 μm and on which micro craters formed by a laser pulse beam are regularly arranged in a predetermined pattern, the rolling reduction rate is By rolling at 0.5 to 3.0%, the surface center line average roughness Ra becomes 2.
A ridge within the range of ~8 μm and having a flat top surface, and a groove-shaped valley formed to surround all or part of the periphery of this ridge. and an intermediate flat part formed between each of the above-mentioned peaks and on the outside of the valley, which is higher than the bottom of the valley and lower than the top surface of the peak. When the average center-to-center distance is Sm and the average diameter of the outer edge of the valley is D,
A method for producing a hot-rolled steel sheet with high roughness and high sharpness, in which Sm and D have a relationship of 0.7≦Sm/D≦2.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29382987A JPH01127104A (en) | 1987-07-16 | 1987-11-20 | Hot rolled steel sheet having high roughness and brightness and its manufacture |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62-177785 | 1987-07-16 | ||
| JP17778587 | 1987-07-16 | ||
| JP29382987A JPH01127104A (en) | 1987-07-16 | 1987-11-20 | Hot rolled steel sheet having high roughness and brightness and its manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01127104A true JPH01127104A (en) | 1989-05-19 |
| JPH0367761B2 JPH0367761B2 (en) | 1991-10-24 |
Family
ID=26498202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29382987A Granted JPH01127104A (en) | 1987-07-16 | 1987-11-20 | Hot rolled steel sheet having high roughness and brightness and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01127104A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH035002A (en) * | 1989-06-01 | 1991-01-10 | Kawai Musical Instr Mfg Co Ltd | Method for roughening work of metallic sheet surface |
| JPH057834A (en) * | 1991-06-28 | 1993-01-19 | Kawasaki Steel Corp | Coated stainless steel sheet having excellent design characteristic and flawing resistance of coated film |
| JP2012130966A (en) * | 2010-11-29 | 2012-07-12 | Nisshin Steel Co Ltd | Highly corrosion-resistant steel plate on which fingerprint and dirt are hardly conspicuous and method of manufacturing the same |
| US20230201899A1 (en) * | 2019-09-17 | 2023-06-29 | Thyssenkrupp Steel Europe Ag | Sheet steel having a deterministic surface structure |
-
1987
- 1987-11-20 JP JP29382987A patent/JPH01127104A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH035002A (en) * | 1989-06-01 | 1991-01-10 | Kawai Musical Instr Mfg Co Ltd | Method for roughening work of metallic sheet surface |
| JPH057834A (en) * | 1991-06-28 | 1993-01-19 | Kawasaki Steel Corp | Coated stainless steel sheet having excellent design characteristic and flawing resistance of coated film |
| JP2012130966A (en) * | 2010-11-29 | 2012-07-12 | Nisshin Steel Co Ltd | Highly corrosion-resistant steel plate on which fingerprint and dirt are hardly conspicuous and method of manufacturing the same |
| US20230201899A1 (en) * | 2019-09-17 | 2023-06-29 | Thyssenkrupp Steel Europe Ag | Sheet steel having a deterministic surface structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0367761B2 (en) | 1991-10-24 |
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