JPS63255320A - Steel sheet having high reflectivity - Google Patents
Steel sheet having high reflectivityInfo
- Publication number
- JPS63255320A JPS63255320A JP62087922A JP8792287A JPS63255320A JP S63255320 A JPS63255320 A JP S63255320A JP 62087922 A JP62087922 A JP 62087922A JP 8792287 A JP8792287 A JP 8792287A JP S63255320 A JPS63255320 A JP S63255320A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- steel plate
- waviness
- roll
- rolled
- 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 67
- 239000010959 steel Substances 0.000 title claims abstract description 67
- 238000002310 reflectometry Methods 0.000 title abstract 4
- 230000003746 surface roughness Effects 0.000 claims abstract description 24
- 238000005096 rolling process Methods 0.000 claims abstract description 16
- 239000002245 particle Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 3
- 238000003754 machining Methods 0.000 abstract description 2
- 230000009452 underexpressoin Effects 0.000 abstract 2
- 238000001914 filtration Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000000576 coating method Methods 0.000 description 10
- 239000011248 coating agent Substances 0.000 description 8
- 239000003921 oil Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000010687 lubricating oil Substances 0.000 description 5
- 239000003973 paint Substances 0.000 description 5
- 238000001228 spectrum Methods 0.000 description 4
- 238000004141 dimensional analysis Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000004185 liver Anatomy 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/005—Rolls with a roughened or textured surface; Methods for making same
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は塗装した鋼板の”表面が高い鮮映性を示す高
鮮映性鋼板に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a high-definition steel plate whose surface exhibits high definition.
高鮮映性鋼板は［１動車や家電製品の外板、建築外装材
その他に用いられる。High-definition steel sheets are used for the exterior panels of moving vehicles and home appliances, building exterior materials, and more.
・（従来の技術）
自動車に対するユーザーニーズは年々高級化指向を強め
ている。なかでも、自動車の外観については光沢の鮮や
かさ、いわゆる塗装鮮映性がその商品イメージを決定す
る重要なファクターとして近年急速に脚光を浴びてきて
いる。また、家電製品の外板や建築外装材などにおいて
も、塗装面の良好な鮮映性は商品価値を一層高めるもの
である。- (Conventional technology) User needs for automobiles are becoming more and more sophisticated year by year. In particular, regarding the appearance of automobiles, the brightness of the gloss, so-called paint clarity, has rapidly come into the spotlight in recent years as an important factor that determines the product image. In addition, good image clarity of painted surfaces also increases the product value of external panels of home appliances, building exterior materials, and the like.
そこで、自動車その他のメーカー各社は塗料および塗装
法の改善によって、塗装鮮映性の向上を図っている。Therefore, automobile and other manufacturers are trying to improve paint clarity by improving paints and coating methods.
（発明が解決しようとする問題点）
上記のように、塗料および塗装法の改にのみによっても
塗装鮮映性をある程度高めることはできるが、更に一層
の向上が望まれている。(Problems to be Solved by the Invention) As described above, it is possible to improve the sharpness of the paint to some extent by simply changing the paint and the coating method, but further improvement is desired.
そこで、この発明は塗装後の鮮映性の向上に寄かするよ
う鋼板表面を改善した高鮮映性鋼板を提供しようとする
ものである。Therefore, the present invention aims to provide a high-definition steel plate whose surface is improved so as to improve the sharpness after painting.
また、この発明では塗装鮮映性と同時にプレス性にも優
れた高鮮映性鋼板を提供しようとするものである。Further, the present invention aims to provide a high-definition steel plate that is excellent in coating sharpness and pressability as well.
（問題点を解決するための手段）
この発明の高鮮映性鋼板は、放電ダル加工を表面に施し
た圧延ロールを用いて圧延した鋼板の表面にランダムな
凹凸を有するとともに、表面うねりがろ波中心線うねり
ＷＣ八（低域フィルタのカットオフ値０．８ｍｍ）表示
で０．７μ層以下であることを特徴としている。上記表
面うねりの表示ＷＣ＾はＪＩＳＢ ０１３１０に基づい
ている。(Means for Solving the Problems) The high-definition steel sheet of the present invention has random irregularities on the surface of the steel sheet rolled using a rolling roll whose surface has been subjected to electric discharge dulling, and has no surface waviness. It is characterized by a wave center line undulation WC8 (low-pass filter cutoff value 0.8 mm) of 0.7μ layer or less. The surface waviness display WC^ is based on JISB 01310.
第１図に定性的に示すように、表面うねりと鮮映性との
間に相関性がある。なお、第１図の横軸は鋼板表面の３
次元プロフィル解析で得られた表面凹凸の波長および周
波数を示している。後に詳述するように表面うねりが０
．７μ層を超えると十分な鮮映性の向上が望めない。As shown qualitatively in FIG. 1, there is a correlation between surface waviness and image clarity. In addition, the horizontal axis in Figure 1 is 3 on the surface of the steel plate.
It shows the wavelength and frequency of surface irregularities obtained by dimensional profile analysis. As will be detailed later, the surface waviness is 0.
．． If the thickness exceeds 7 μm, sufficient improvement in image clarity cannot be expected.
また、上記鋼板において、表面粗さが中心線平均粗ざＲ
ａ表示で０．８μ−以上、かつ３．０μ−以下であるこ
とが９！ましい。ここで１表面粗さの表示Ｒ７，はＪＩ
Ｓ Ｂ ０８０１に基づいている。In addition, in the above steel plate, the surface roughness is center line average roughness R
It is 9 that it is 0.8 μ- or more and 3.0 μ- or less in a display! Delicious. Here, 1 surface roughness display R7, is JI
Based on SB 0801.
第２１Ｓ４に定性的に示すように、表面粗さとプレス性
（型かじりおよび表面摩擦）との間に相関性がある６表
面粗さＲ４が０．６μ層未満あるいは３．０μｍを超え
ると、プレス性が悪化する。As qualitatively shown in Section 21S4, there is a correlation between surface roughness and pressability (mold galling and surface friction).6 If surface roughness R4 is less than 0.6 μm or exceeds 3.0 μm, pressability Sexuality worsens.
放電ダル加工によりロール表面に凹凸を形成したＩＥヨ
延ロールにより、鋼板を軽圧下圧延することにより所要
の表面性状（表面うねりおよび表面粗さ）をもった高鮮
映性鋼板を得ることができる。A high-definition steel plate with the desired surface texture (surface waviness and surface roughness) can be obtained by lightly rolling a steel plate using an IE rolling roll with unevenness formed on the roll surface by electric discharge dulling. .
なお、従来の鋼板圧延用の圧延ロール表面に所要の凹凸
を形成するには、放電加工あるいはショツトブラストに
よっている。Incidentally, conventional electric discharge machining or shot blasting is used to form the required unevenness on the surface of a roll for rolling a steel plate.
（作用）
この発明の高鮮映性鋼板は表面うねりが小さいために、
塗装後の表面も平滑となり、良好な鮮映性が得られる。(Function) Since the high-definition steel plate of this invention has small surface waviness,
The surface after painting is also smooth and provides good image clarity.
第３図（イ）はこの発明の鋼板Ｓの表面に塗Ｉ！！２Ｆ
を形成したものを模式的に示゛しており、塗膜面は平滑
となっている。第３図（ロ）は従来の鋼板Ｓの表面に塗
膜Ｐを形成したもので、図面に示すように鋼板自体のう
ねりがそのまま９１１Ｑ表面のうねりとなって残ってい
る。したがって、塗装面に入射した光は塗装面より多方
向に反射されるので、鮮映性は減じる。Figure 3 (a) shows the surface of the steel plate S of this invention coated with I! ! 2F
This is a schematic diagram showing a coating film formed on the surface, and the coating surface is smooth. FIG. 3(B) shows a coating film P formed on the surface of a conventional steel plate S, and as shown in the drawing, the undulations of the steel plate itself remain as undulations on the surface of 911Q. Therefore, the light incident on the painted surface is reflected in multiple directions from the painted surface, resulting in poor image clarity.
また、この発明の高鮮映性鋼板は表面粗さが小さいため
に、プレス加工の際に塗布した潤滑油が鋼板全面にわた
って均一な油膜を形成する。第４図（イ）はこの発明の
鋼板Ｓの表面に塗布された潤滑油りを模式的に示してお
り、潤滑油りは鋼板表面の凹凸のＩｎに均一に保持され
ている。一方、第４図（ロ）は従来の鋼板Ｓの表面に塗
布された潤滑油りの状１ｒｌを示しており、場所によっ
ては油膜が切れている。したがって、油膜の切れた部分
では摩擦が著しく大きくなり、型のかじりおよび加工力
の増大を招く、なお１表面粗さが小さすぎると、鋼板表
面に油膜が付着しにくくなり、このことによっても型の
かじりが発生する。Furthermore, since the high-definition steel sheet of the present invention has a small surface roughness, the lubricating oil applied during press forming forms a uniform oil film over the entire surface of the steel sheet. FIG. 4(A) schematically shows the lubricating oil coated on the surface of the steel plate S of the present invention, and the lubricating oil coat is uniformly held on the uneven In of the steel plate surface. On the other hand, FIG. 4(b) shows the state of lubricating oil 1rl applied to the surface of a conventional steel plate S, and the oil film is broken in some places. Therefore, friction increases significantly at the parts where the oil film breaks, leading to galling of the mold and an increase in processing force.1.If the surface roughness is too small, it becomes difficult for the oil film to adhere to the surface of the steel plate, which also causes mold Galling occurs.
（実施例）
この発Ｉｌｌの鋼板を得るために、圧延ロールを次のよ
うにしてに’ｉ ４１０した。まず、ロール表面を鏡面
仕りしたのち、電極−ロール間ギャップおよび放電電流
を精密にＩＪ１ｇ＃Ｌながら放電ダル加工した。EXAMPLE In order to obtain a steel plate of this type, a rolling roll was subjected to 'i410' as follows. First, the surface of the roll was polished to a mirror finish, and then the gap between the electrode and the roll and the discharge current were precisely adjusted using IJ1g#L.
ついで、ロール表面を精密クロムめっきした。Then, the roll surface was precision chromium plated.
」−記圧延ロールを用いて板厚０．７＋ｓｍの自動小川
鋼板（Ｍ通鋼）を川下率１．０％で軽圧下圧延した。な
お、比較のために、従来のダルロールによって上記と同
一の鋼板を同一の圧延条件で圧延した。そして、これら
圧延によって得られた鋼板について、以下に述べるよう
に表面プロフィルの３次元解析を行い、鋼板表面性状（
表面うねりおよび表面粗さ）と鮮映性およびプレス性と
の関係について調査した。An automatic Ogawa steel plate (M Tsuko) with a thickness of 0.7+sm was lightly rolled at a downstream ratio of 1.0% using a rolling roll. For comparison, the same steel plate as above was rolled using a conventional dull roll under the same rolling conditions. Then, three-dimensional analysis of the surface profile of the steel sheets obtained by these rolling processes was performed as described below, and the surface properties of the steel sheets (
The relationship between surface waviness (surface waviness and surface roughness) and image clarity and pressability was investigated.
第５図はこの発明の鋼板Ａおよび従来の鋼板Ｂについて
表面うねりおよび表面粗さの測定結果を示している１表
面うねりおよび表Ｗｉ粗さは触針式表面粗さ計で測定し
た。この図面から明らかなように、両鋼板Ａ、Ｈにおい
て表面粗さＲａは重複する範囲があるが、この９．１１
の鋼板Ａの表面うねりＷＯ６は従来のものＢよりもかな
り小さくなている。FIG. 5 shows the measurement results of surface waviness and surface roughness for steel sheet A of the present invention and conventional steel sheet B.1 Surface waviness and surface roughness were measured using a stylus type surface roughness meter. As is clear from this drawing, the surface roughness Ra of both steel sheets A and H has an overlapping range, but this 9.11
The surface waviness WO6 of the steel plate A is considerably smaller than that of the conventional steel plate B.
第６図は」−記鋼板の表面プロフィルの３次元解析の結
果を示すもので、波長のパワースペクトルを示している
。この図面からＩＪＪらかなように、この発明の鋼板Ａ
は表面うねりが従来の鋼板Ｂに比べて著しく小さくなっ
ている。FIG. 6 shows the results of a three-dimensional analysis of the surface profile of the steel plate, and shows the wavelength power spectrum. From this drawing, it is clear that IJJ is the steel sheet A of this invention.
The surface waviness is significantly smaller than that of conventional steel plate B.
第７図は上記鋼板の表面を塗装したものの波長のパワー
スペクトルを示している。この図面から明らかなように
、この発明の鋼板Ａの塗装表面の表面うねりも従来の鋼
板Ｂに比べて著しく小さくなっている。FIG. 7 shows the wavelength power spectrum of the steel plate whose surface is coated. As is clear from this drawing, the surface waviness of the painted surface of the steel plate A of the present invention is also significantly smaller than that of the conventional steel plate B.
第８図は第６図の結果を模式的に示したもので、一般的
にぼってこの発明の鋼板Ａの表面のプロフィルの波長は
、短い波長よりに幅広く分布している。これに対して従
来の鋼板Ｂの波長は、長い波長よりに集中的に分布して
いる。このことが鮮映性の向上に寄与している。FIG. 8 schematically shows the results of FIG. 6, and generally speaking, the wavelengths of the surface profile of the steel plate A of the present invention are distributed more widely than the shorter wavelengths. On the other hand, the wavelengths of the conventional steel plate B are distributed more intensively at longer wavelengths. This contributes to improved image clarity.
第９図は表面うねりと鮮映性との関係を示したものであ
る。鮮映性は写像鮮映度肝で測定したＮ５ＩＣ値で示し
ている。この図面から明らかなように、うねりが０．７
μ厘より大きくなると鮮映性が低下する。FIG. 9 shows the relationship between surface waviness and image clarity. The image sharpness is indicated by the N5IC value measured in the image sharpness liver. As is clear from this drawing, the waviness is 0.7
When the distance is larger than μm, the image sharpness decreases.
第１０図のグラフは、鋼板に２層塗装および３層塗装し
た場合の鮮映性をこの発明の鋼板と従来のものとを比較
して示している。グラフはＮ５ＩＣ値で表示しているが
、目視によっても鮮映性に大きな差異が認められた。The graph in FIG. 10 compares the sharpness of the steel plate of the present invention with that of a conventional steel plate when a two-layer coating and a three-layer coating are applied to the steel plate. Although the graph shows the N5IC value, a large difference in image clarity was also observed by visual inspection.
第１１図は表面粗さと型かじり性との間の関係を示すグ
ラフである。表面粗さＲ１が０．８μｍ未満となると型
かじり性が急激に悪化する。なお、表面粗さが３．０μ
■を超えると、型かじり性が悪化するが、更に鋼板に３
．ＯＢを超える表面粗さを与えるには圧延ロールに５．
０μ層以上の表面粗さを形成せねばならず、ロール表面
加工が著しく困難となり、経済的でない。FIG. 11 is a graph showing the relationship between surface roughness and mold galling property. When the surface roughness R1 is less than 0.8 μm, the mold galling property deteriorates rapidly. In addition, the surface roughness is 3.0μ
If it exceeds ■, the mold galling property will worsen, but it will also cause the steel plate to
．． To give a surface roughness exceeding OB, apply 5. to the rolling roll.
It is necessary to form a surface roughness of 0μ or more, making roll surface processing extremely difficult and uneconomical.
また、プレス加工時（超硬材ＳＲＴ工具を用い。Also, during press processing (using a carbide SRT tool).
鋼板には一般防錆油を塗布）の摩擦係数は、この発明の
鋼板では０．０９２であり、従来の鋼板ではＯｉｌであ
った。The coefficient of friction of the steel plate of the present invention was 0.092 (the steel plate was coated with a general anti-corrosion oil), whereas that of the conventional steel plate was oil.
（発明の効果）
この発明の鋼板は表面うねりを小さくしているので、従
来の鋼板に比べて高い鮮映性を示す、また、表面粗さを
一定の範囲に抑えることにより、良好なプレス性を得る
ことができる。(Effects of the Invention) The steel sheet of this invention has less surface waviness, so it exhibits higher image clarity than conventional steel sheets.Also, by keeping the surface roughness within a certain range, it has good pressability. can be obtained.
第１図は表面うねりと鮮映性との関係を定性的に示すグ
ラフ、第２図は表面粗さとプレス性との関係を定性的に
示すグラフ、第３図は塗膜面の鮮映性の説明図、第４図
は鋼板表面の潤滑油の状態を示す模式図、第５図はこの
発明の鋼板および従来の鋼板について表面うねり′およ
び表面粗さの測定結果を示すグラフ、第６図は鋼板表面
凹凸の波長のパワースペクトル図、第７図は塗装表面凹
凸の波長のパワースペクトル図、第８図は第７図の模式
図、第９図は表面うねりと鮮映性との関係を示すグラフ
、第１Ｏ図は鋼板に２層塗装および３層塗装した場合の
鮮映性をこの発明の鋼板と従来のものとを比較して示す
グラフ、およびｆＪＳｌ１図は表面粗さと型かじり性と
の間の関係を示すグラフである。
［株］□週長−一−→０
（０−１１１！Ｗ−−→ｏ６）
輔←−−膿長−−→０
（０鴫−−Ｆｌ ′、ｌｌＦ饗父→へ）第５図
Ｏｂ ロ１ １Ｄ
ｌ、ｆｉ ・・ｗｅ；ａ第６図
第７図
第８図
第９図
０．５ １，０ １．５
Ｚ、Ｕ Ｗｃ−第１Ｏ図
第１１図
Ｒｄψ１ａ）Figure 1 is a graph that qualitatively shows the relationship between surface waviness and image clarity, Figure 2 is a graph that qualitatively shows the relationship between surface roughness and pressability, and Figure 3 is a graph that qualitatively shows the relationship between surface waviness and image clarity. FIG. 4 is a schematic diagram showing the state of lubricating oil on the surface of the steel plate, FIG. 5 is a graph showing the measurement results of surface waviness and surface roughness for the steel plate of the present invention and the conventional steel plate, and FIG. 6 is a power spectrum diagram of the wavelength of the unevenness on the steel plate surface, Figure 7 is a power spectrum diagram of the wavelength of the unevenness of the painted surface, Figure 8 is a schematic diagram of Figure 7, and Figure 9 shows the relationship between surface waviness and image clarity. The graph shown in Figure 1O is a graph comparing the sharpness of the steel plate of this invention and the conventional one when two-layer coating and three-layer coating are applied to a steel plate, and Figure fJSl1 shows the relationship between surface roughness and mold galling property. It is a graph showing the relationship between. [Stock] □ Week length-1-→0 (0-111!W--→o6) 輔←--Pus length--→0 (0鴫--Fl ′, llF 饫子→to) Fig. 5 Ob B1 1D
l, fi...we; aFig. 6 Fig. 7 Fig. 8 Fig. 9 0.5 1,0 1.5
Z, U Wc-Figure 1O Figure 11 Rdψ1a)
Claims (3)
圧延した鋼板の表面にランダムな凹凸を有するとともに
、表面うねりがろ波中心線うねりＷ＿Ｃ＿Ａ（低域フィ
ルタのカットオフ値０．８ｍｍ）表示で０．７μｍ以下
であることを特徴とする高鮮映性鋼板。(1) The surface of the steel plate rolled using a rolling roll with electrical discharge dulling applied to the surface has random irregularities, and the surface waviness is filter center line waviness W_C_A (low-pass filter cutoff value 0.8 mm) A high-definition steel plate characterized by a display size of 0.7 μm or less.
ｍ以上、かつ３．０μｍ以下である特許請求範囲第１項
記載の高鮮映性鋼板。(2) Surface roughness is 0.6μ in center line average roughness R_a
The high-definition steel plate according to claim 1, which has a particle diameter of at least 3.0 μm and at most 3.0 μm.
成した圧延ロールで圧延して得られた特許請求範囲第１
項記載の高鮮映性鋼板。(3) Claim 1 obtained by rolling with a rolling roll having irregularities corresponding to the surface waviness formed on the roll surface.
High-definition steel plate described in Section 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62087922A JPH0623409B2 (en) | 1987-04-11 | 1987-04-11 | High image clarity steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62087922A JPH0623409B2 (en) | 1987-04-11 | 1987-04-11 | High image clarity steel plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63255320A true JPS63255320A (en) | 1988-10-21 |
| JPH0623409B2 JPH0623409B2 (en) | 1994-03-30 |
Family
ID=13928412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62087922A Expired - Lifetime JPH0623409B2 (en) | 1987-04-11 | 1987-04-11 | High image clarity steel plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0623409B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04253502A (en) * | 1990-12-28 | 1992-09-09 | Nippon Steel Corp | Steel sheet having excellent painting brightness and production thereof |
| JPH04253503A (en) * | 1990-12-28 | 1992-09-09 | Nippon Steel Corp | Steel sheet for working having excellent painting brightness and production thereof |
| JPH04274808A (en) * | 1991-02-27 | 1992-09-30 | Hitachi Ltd | Grinding device and method for circular member, columnar or cylindrical member and material to be rolled |
| EP3383560A4 (en) * | 2015-12-04 | 2019-10-02 | Arconic Inc. | Embossing for electro discharge textured sheet |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62230402A (en) * | 1986-03-31 | 1987-10-09 | Kawasaki Steel Corp | Steel sheet to be painted and its production |
| JPS63132728A (en) * | 1986-11-25 | 1988-06-04 | Sumitomo Metal Ind Ltd | Steel plate having high clear reflection excellent in workability |
-
1987
- 1987-04-11 JP JP62087922A patent/JPH0623409B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62230402A (en) * | 1986-03-31 | 1987-10-09 | Kawasaki Steel Corp | Steel sheet to be painted and its production |
| JPS63132728A (en) * | 1986-11-25 | 1988-06-04 | Sumitomo Metal Ind Ltd | Steel plate having high clear reflection excellent in workability |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04253502A (en) * | 1990-12-28 | 1992-09-09 | Nippon Steel Corp | Steel sheet having excellent painting brightness and production thereof |
| JPH04253503A (en) * | 1990-12-28 | 1992-09-09 | Nippon Steel Corp | Steel sheet for working having excellent painting brightness and production thereof |
| JPH04274808A (en) * | 1991-02-27 | 1992-09-30 | Hitachi Ltd | Grinding device and method for circular member, columnar or cylindrical member and material to be rolled |
| EP3383560A4 (en) * | 2015-12-04 | 2019-10-02 | Arconic Inc. | Embossing for electro discharge textured sheet |
| US11130160B2 (en) | 2015-12-04 | 2021-09-28 | Arconic Technologies Llc | Embossing for electro discharge textured sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0623409B2 (en) | 1994-03-30 |
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