JPS6333593A - Plated steel sheet having superior press formability and sharpness after coating - Google Patents
Plated steel sheet having superior press formability and sharpness after coatingInfo
- Publication number
- JPS6333593A JPS6333593A JP17708386A JP17708386A JPS6333593A JP S6333593 A JPS6333593 A JP S6333593A JP 17708386 A JP17708386 A JP 17708386A JP 17708386 A JP17708386 A JP 17708386A JP S6333593 A JPS6333593 A JP S6333593A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- surface roughness
- sharpness
- press formability
- coating
- 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
- 238000000576 coating method Methods 0.000 title abstract description 14
- 239000011248 coating agent Substances 0.000 title abstract description 13
- 230000003746 surface roughness Effects 0.000 claims abstract description 46
- 238000010422 painting Methods 0.000 claims description 21
- 239000000126 substance Substances 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 abstract description 14
- 239000003973 paint Substances 0.000 abstract description 8
- 239000010960 cold rolled steel Substances 0.000 abstract description 7
- 230000001105 regulatory effect Effects 0.000 abstract description 4
- 229910007567 Zn-Ni Inorganic materials 0.000 abstract description 2
- 229910007614 Zn—Ni Inorganic materials 0.000 abstract description 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 2
- 239000000956 alloy Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 11
- 239000010687 lubricating oil Substances 0.000 description 5
- 238000007747 plating Methods 0.000 description 4
- 238000005422 blasting Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004070 electrodeposition Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 125000002091 cationic group Chemical group 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 229910000655 Killed steel Inorganic materials 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000001825 Polyoxyethene (8) stearate Substances 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- RQMIWLMVTCKXAQ-UHFFFAOYSA-N [AlH3].[C] Chemical compound [AlH3].[C] RQMIWLMVTCKXAQ-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 1
- 229910000165 zinc phosphate Inorganic materials 0.000 description 1
Landscapes
- Metal Rolling (AREA)
- Electroplating Methods And Accessories (AREA)
- Coating With Molten Metal (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業りの利用分野〉
本発明は鋼板表面粗度パターンを制御することにより、
プレス成形性および塗装後の鮮映性を著しく向にさせた
めっき鋼板に関するものである。[Detailed description of the invention] <Industrial application field> The present invention provides a method for controlling the surface roughness pattern of a steel plate.
This invention relates to a plated steel sheet that has significantly improved press formability and sharpness after painting.
〈従来技術およびその問題点〉
従来自動車分野では、過酷な腐食環境にさらされる自動
り（ボディの内面がめつきまたは有機被膜面で、外面が
冷延面である片面表面処理鋼板が使用されてきた。とこ
ろが、自動車外面においても砂利、小石などの衝突によ
る外面塗膜の損傷に伴う錆、ふくれ発生で外観が著しく
損なわれる問題があり、この外面防錆対策として、最近
外面にもめっきを施した両面めっき鋼板が使用ざわるよ
うになってきた。<Prior art and its problems> Conventionally, in the automobile field, single-sided surface-treated steel sheets have been used for automobiles exposed to harsh corrosive environments (the inner surface of the body is plated or organically coated, and the outer surface is cold-rolled). However, there is a problem with the exterior of automobiles, where the exterior paint is damaged by collisions with gravel, pebbles, etc., resulting in rust and blisters, which significantly impairs the exterior appearance. Double-sided plated steel sheets have come into use.
方、外面使用の場合、塗装後外観として、塗面の写像の
鮮映性（鮮映性と呼ぶ）が商品価値として注目されはじ
めた。On the other hand, when used on external surfaces, the appearance after painting, the sharpness of the image on the painted surface (referred to as sharpness), has begun to attract attention as a commercial value.
ここでＪｊ゛う鮮映性とは、塗膜面トの物体の映りの鮮
明性を言う。塗膜への写像の映りが鮮明であることの意
味は、例えば物体の７ｉ！、膜トの写像の境界がぼける
、すなわち境界のぶれの広がりで評価したものであり、
Ｊ Ｉ ５Ｈ８６８６やＡＳＴＭＥ４３０等で示される
。The definition of sharpness here refers to the sharpness of the image of an object on the coating surface. The meaning of clear mapping on the paint film is, for example, the 7i! , it is evaluated by the blurring of the boundary of the mapping of the film, that is, the extent of the blurring of the boundary,
It is shown in J I 5H8686, ASTM E430, etc.
塗装後の鮮映性については、既に特開昭５９−１６３６
号、同６０−７５３６８号公報等においぞめっき鋼板の
表面粗度Ｒｚを１−以下にするスキンパス方法が開示さ
れている。これらの公知技術は、従来のショツトブラス
ト加工等のスキンバスロールによる不規則な表面粗度パ
ターンであって、この粗度パターンの不規則性は塗装後
の表面にも反映され、塗面の拡散反射が多くなり、鮮映
性を低下させ、任、αの表面粗度（Ｒｚ）では鮮映性は
規制できないという欠点がある。Regarding the sharpness of the image after painting, it has already been published in Japanese Patent Application Laid-Open No. 59-1636.
No. 60-75368 discloses a skin pass method for reducing the surface roughness Rz of a grease-plated steel sheet to 1- or less. These known techniques are based on the irregular surface roughness pattern created by skin bath rolls such as conventional shot blasting, and the irregularity of this roughness pattern is also reflected on the surface after painting, resulting in diffusion of the painted surface. This has the drawback that reflection increases, deteriorating image clarity, and image clarity cannot be controlled by a surface roughness (Rz) of a certain value.
また、自動車用鋼板では、自動車車体の組み立て前に鋼
板に種々のプレス加工が施されるため、優れた深絞り性
が要求される。しかし、自動車用に一般的に用いられる
亜鉛めっき鋼板は、冷延鋼板に比へめっき被膜によるプ
レス加［時の金型への焼付きが起りやすく、深絞り性が
劣る。In addition, steel sheets for automobiles are required to have excellent deep drawability because various press workings are performed on the steel sheets before assembly of the automobile body. However, compared to cold-rolled steel sheets, galvanized steel sheets commonly used for automobiles are more likely to seize into molds during pressing due to the plating film, and are inferior in deep drawability.
深絞り性向トのためには、鋼板の機械的特性として高い
延性（Ｅ２）と高いランクフォード値（ｒ値）が必要で
ある。さらに実際の絞り成形（とくに自動１ｊのパネル
）においては、張出し成形との複合成形であることが多
いため、加工硬化指数（ｎ値）もｍ要になってくる。In order to have good deep drawing properties, the mechanical properties of the steel sheet need to be high ductility (E2) and high Lankford value (r value). Furthermore, in actual drawing forming (particularly automatic 1J panels), composite forming with stretch forming is often performed, so the work hardening index (n value) is also important.
ところで、深絞り成形に関する研究は素材である鋼板側
と、成形技術の両面から行なわれてきている。しかしな
がら、製品の高精度化と複雑化に伴い、鋼板に対する要
求特性がより高級化、多様化しつつある。とりわけ自動
市川鋼板においてはこの傾向が強い。By the way, research on deep drawing has been conducted from both the perspective of the steel sheet material and the forming technology. However, as products become more precise and complex, the characteristics required of steel sheets are becoming more sophisticated and diversified. This tendency is particularly strong in automatic Ichikawa steel sheets.
たとえば、自動車虫体の組立てには多数のプレス部品を
点溶接しているのが現状であるが、これらを大型化、一
体止することにより点溶接数を減らしたいという要求が
強い。一方、多様化するニーズに応するために車のデザ
インはより複雑化し、そのため従来の鋼板では成形が困
難な部品が増加している。これらの要求に応するために
は、従来よりも優れたプレス成形性を有するめっき鋼板
が必要である。For example, the current situation is that a large number of press parts are spot welded when assembling an automobile body, but there is a strong demand to reduce the number of spot welds by increasing the size of these parts and joining them together. Meanwhile, car designs are becoming more complex in order to meet diversifying needs, and as a result, an increasing number of parts are difficult to form using conventional steel plates. In order to meet these demands, a plated steel sheet is required that has better press formability than conventional ones.
ところで、実際のプレス成形においては、その評価基準
は、従来用いられてきた鋼板の機械的特性（ｒ値、Ｅｊ
２． ｎ値）だけでは不モ分である。By the way, in actual press forming, the evaluation criteria are the mechanical properties (r value, Ej
2. n value) alone is insufficient.
たとえば、鋼板表面粗度あるいは潤滑油等もプレス成形
性に大きな影響をおよぼす。For example, the surface roughness of the steel sheet, lubricating oil, etc. have a large effect on press formability.
プレス成形性等におよぼす鋼板表面粗度の影響を示した
公知技術はいくつか開示されてイル。タトエば［塑性と
加工Ｊ Ｖｏｌ、３ Ｎｏ、 １４（１９６２−３
）では、高粘度潤滑油の場合、数戸程度の鋼板表面粗度
で最も絞り性が向上することを示している。一方、特公
昭５９−３４４４１号公報ではロール表面粗度（Ｒａ）
とピーク数（ＰＰＩ）とがそれぞれＲａ＝２．８ （
４）、ＰＰ Ｉ ＝２２６なるダルロールで調質圧延す
ることにより、塗装後外観性およびプレス加工性に優れ
る冷延鋼板の調質圧延法を示している。Several known techniques have been disclosed that show the influence of steel sheet surface roughness on press formability and the like. Tatoeba [Plasticity and Processing J Vol, 3 No. 14 (1962-3
) shows that in the case of high-viscosity lubricating oil, the drawability is improved most when the steel plate surface roughness is about a few degrees. On the other hand, in Japanese Patent Publication No. 59-34441, the roll surface roughness (Ra)
and the number of peaks (PPI) are Ra=2.8 (
4) shows a temper rolling method for cold-rolled steel sheets with excellent post-painting appearance and press workability by temper rolling with dull rolls with PP I =226.
これらの公知技術は、プレス成形性を向上させるという
点では優れたものであるが、いずれも鋼板表面粗度を規
制しなくてはならないという欠点がある。Although these known techniques are excellent in terms of improving press formability, they all have the drawback that the surface roughness of the steel sheet must be regulated.
さらにト記公知技術は、任意の表面粗度（Ｒａ）を有し
、かつプレス成形性、および塗装後の鮮映性に優れるめ
っき鋼板の製造に関しては何ら示唆を！ｊ−えるもので
はない。Furthermore, the known techniques mentioned above do not provide any suggestions regarding the production of plated steel sheets that have arbitrary surface roughness (Ra) and are excellent in press formability and image clarity after painting! j-It's not something you can get.
〈発明の目的〉
本発明はト述した従来技術の欠点を解消し、表面粗度パ
ターンに方向性を持たせ、さらに表面粗度中心面におけ
る凸部１個あたりの平均面積を規制１することにより表
面粗度に無関係にプレス成形性、および塗装後の鮮映性
を向上させることができるめっき鋼板を提供することを
目的とする。<Objective of the Invention> The present invention solves the drawbacks of the prior art described above, gives directionality to the surface roughness pattern, and further regulates the average area of each convex portion in the center plane of the surface roughness. An object of the present invention is to provide a plated steel sheet that can improve press formability and image clarity after painting regardless of surface roughness.
〈発明の構成〉
本発明によれば、上記式で示される鋼板表面粗度の規則
性を表わす規則度パラメータＳが少なくとも１方向につ
いてＳ≦０．２５で、かつ表面粗度中心面における凸部
１個あたりのモ均面積Ｓ Ｇ ｒが２０００≦ＳＧｒ≦
３００００ （７ｍ２）であることを特徴とするプレス
成形性および塗装後鮮映性に優れるめっき鋼板が提供さ
れる。<Structure of the Invention> According to the present invention, the regularity parameter S representing the regularity of the steel sheet surface roughness expressed by the above formula is S≦0.25 in at least one direction, and the convex portion in the center plane of the surface roughness is The uniform area S G r per piece is 2000≦SGr≦
30,000 (7 m2), and is characterized by excellent press formability and sharpness after painting.
Ｘ＝−Σ Ｘｉ ｎ ＋＝１ ｘｉ：鋼板表面凸部ピーク間距離 以下に本発明を更に詳細に説明する。X=-ΣXi n +=1 xi: Distance between peaks of convex parts on steel plate surface The present invention will be explained in more detail below.
まず本発明の基礎となった研究結果から述べる。First, the research results that formed the basis of the present invention will be described.
供試鋼は低炭素アルミキルド鋼の冷延鋼板を用いた。こ
れをレーザーによるダル加工（以下レーザーダル加工）
を施したスキンバスロールを用いて０．８％圧下率でス
キンバス圧延したのち、その上に電気亜鉛めっきを施し
た。この時、レーザーダル加工法を種々変えることによ
り、スキンバス圧延後の鋼板表面粗度パターンを変化さ
せた。The test steel used was a cold rolled steel plate made of low carbon aluminum killed steel. This is dulled using a laser (hereinafter referred to as laser dulling)
After skin bath rolling was carried out at a rolling reduction of 0.8% using a skin bath roll subjected to the following steps, electrogalvanization was applied thereon. At this time, the surface roughness pattern of the steel sheet after skin bath rolling was changed by variously changing the laser dulling method.
第１図に、鋼板表面粗度パターンの規則度パラメータＳ
値と限界絞り比の関係を示す。Ｓ値は圧延方向について
の測定値であり、平均表面粗度（Ｒａ）はいずれも約１
．２−である。限界絞り比はＳ値に強く依存し、Ｓ≦０
．２５とすることによりブレス成Ｊ［ａ性か著しく向ト
した。Figure 1 shows the regularity parameter S of the steel plate surface roughness pattern.
The relationship between the value and the limit aperture ratio is shown. The S value is a value measured in the rolling direction, and the average surface roughness (Ra) is approximately 1.
．． It is 2-. The limiting drawing ratio strongly depends on the S value, and S≦0
．． 25, breath formation J[a] was significantly improved.
第２図にスキンバス圧延後の鋼板表面粗度中心面におけ
る凸部１個当りの平均面ｆｉ”ｌ Ｓ Ｇ ｒ（ｐ２）
と塗装後のｉＩ￥映性との関係を示す。この時のスキン
バス圧下率０．８％、Ｓ値は０．１８である。Figure 2 shows the average surface per convex portion fi”l S G r (p2) on the center plane of the steel plate surface roughness after skin bath rolling.
This shows the relationship between the irradiance and the iI image quality after painting. At this time, the skin bath reduction rate was 0.8% and the S value was 0.18.
塗装後の鮮映性はＳＧｒに強く依存し、ＳＧｒ≧２００
０（−２）とすることにより鮮映性は著しく向トした。The sharpness after painting strongly depends on SGr, and SGr≧200
By setting the value to 0(-2), the image clarity was significantly improved.
なお、塗装条件としては、下地処理としてりん酸塩被膜
処理を施し、その上にカチオン型電着塗装、中塗り、上
塗りの塗装工程を施した。すなわち、上記めっき鋼板に
日本パー力ライジング社製の化成処理液（ボンデライト
Ｌ３０２０）（リン酸亜鉛）で付着量２．０〜２．５ｇ
／ｒｎ’となるように化成処理を施し、引き続き日本ペ
イント製の電着塗料（パワートップＵ３０）で膜厚１８
〜２２７ｍとなるようにカチオン電着塗装後、関西ペイ
ント製中塗塗料（アミラックチッピングシーラーＮ３）
で膜厚３５〜４０声となるように塗装後、関西ペイント
製上塗塗料（ネオアミラックＢＯＯ２）で膜厚３５〜４
０−となるように塗装した。As for the coating conditions, a phosphate coating was applied as a base treatment, and then the coating processes of cationic electrodeposition coating, intermediate coating, and top coating were applied. That is, the coating amount of 2.0 to 2.5 g of a chemical conversion solution (Bonderite L3020) (zinc phosphate) manufactured by Nippon Parriki Rising Co., Ltd. was applied to the above-mentioned plated steel sheet.
/rn', and then applied Nippon Paint's electrodeposition paint (Power Top U30) to a film thickness of 18.
After applying cationic electrodeposition to a length of ~227m, apply intermediate coating paint made by Kansai Paint (Amilac Chipping Sealer N3)
After painting to a film thickness of 35 to 40 degrees, apply a top coat made by Kansai Paint (Neoamilac BOO2) to a film thickness of 35 to 4.
It was painted so that it became 0-.
また鮮映性の評価法としてはＤ ＯＩ （ＤｉｓＬｉｎ
ｃｔｎｅｓｓ ｏｆ Ｒｅｆｌｅｃｔｅｄ Ｉｍａｇｅ
）を採用した。この方法は第３図に示すように、入射
角３０゛で入射した光が３０°の反射角で反射した時の
反射光の強度をＲｓとし、かつ反射角が３０“±０．３
“で反射した反射光の強度をＲ８３とする時、ＤＯＩ＝
１００ （Ｒｓ Ｒａ３）／Ｒｓで示される。In addition, DOI (DisLin
ctness of Reflected Image
)It was adopted. In this method, as shown in Figure 3, when light incident at an incident angle of 30° is reflected at a reflection angle of 30°, the intensity of the reflected light is Rs, and the reflection angle is 30°±0.3.
When the intensity of the reflected light reflected by “ is R83, DOI=
It is expressed as 100 (Rs Ra3)/Rs.
本発明者らはこの基礎的データに基づき研究を重ねた結
果、以下のように製造条件を規制することにより、プレ
ス成形性および塗装後の鮮映性に優れるめっき鋼板の製
造が可能となることを見い出した。As a result of repeated research based on this basic data, the inventors of the present invention have found that by regulating the manufacturing conditions as shown below, it is possible to manufacture a plated steel sheet with excellent press formability and sharpness after painting. I found out.
まず、最も重要なものが鋼板表面粗度パターンである。First, the most important thing is the steel plate surface roughness pattern.
そして、本発明における鋼板表面粗度の規則性を表わす
規則度パラメータＳは、鋼板表面凸部ピーク間距離なＸ
ｉとした時、Ｆ記のように表わすことができる。The regularity parameter S representing the regularity of the steel plate surface roughness in the present invention is the distance between the peaks of the convex parts on the steel plate surface
When i is set, it can be expressed as in the notation F.
Ｘ＝−Σ Ｘｉ
ｎ ＋−１
また、鋼板表面粗度中心面における凸部１個あたりの７
均面積は、３次元表面粗度計を用いて測定した。X=-Σ Xi n +-1 Also, 7 per convex part on the center plane of the steel plate surface roughness
The uniform area was measured using a three-dimensional surface roughness meter.
表面粗度の規則性を表わす規則度パラメータＳが少なく
とも１方向についてＳ≦０．２５を満たすことが必須で
ある。Ｓ＞０．２５では優れたプレス成形性を得ること
ができない。従来のめっき鋼板ではＳ値は０．３〜０．
５程度である。It is essential that the regularity parameter S representing the regularity of surface roughness satisfies S≦0.25 in at least one direction. If S>0.25, excellent press formability cannot be obtained. Conventional plated steel sheets have an S value of 0.3 to 0.
It is about 5.
さらに本発明によれば、表面粗度中心面における凸部１
個当りのモ均面％ｌ Ｓ Ｇ ｒが２０００≦ＳＧｒ≦
３００００（−２）であることが必須である。ＳＧｒ＜
２０００ではｆｆｋねた塗装後の鮮映性を得ることがで
きない。一方、ＳＧｒ＞３００００となると、塗装後の
鮮映性には優れるものの、プレス成形性が逆に劣ってく
ることが確認された。Furthermore, according to the present invention, the convex portion 1 on the surface roughness center plane
Mo surface %l per piece S G r is 2000≦SGr≦
It is essential that it is 30000(-2). SGr<
2000, it is not possible to obtain a clear image after painting with ffk. On the other hand, when SGr>30,000, it was confirmed that although the image clarity after coating was excellent, the press formability was conversely poor.
なお、このような規則的な鋼板表面粗度パターンを得る
ためには、下地鋼板として冷延鋼板およびめっき鋼板の
スキンパス圧延時のスキンパスロールの表面粗度パター
ンも必然的に規則的でなければいけない。そのためのス
キンパスロールの加工法としては、放電ダル加工法、レ
ーザーダル加工法、あるいは特別に製造したグリッドを
使用するショツトブラスト法が適する。In addition, in order to obtain such a regular steel sheet surface roughness pattern, the surface roughness pattern of the skin pass roll during skin pass rolling of the cold rolled steel sheet and plated steel sheet as the base steel sheet must also necessarily be regular. . Suitable methods for processing skin pass rolls for this purpose include electric discharge dulling, laser dulling, or shot blasting using a specially manufactured grid.
鋼板表面粗度パターンがＳ≦０．２５を満たすとともに
２０００≦ＳＧｒ≦３００００ （４２）を満たしてい
れば、謳板表面粗度、たとえば平均表面粗度（Ｒａ）、
潤滑油の種類、プレス条件等は任意でよい。If the steel plate surface roughness pattern satisfies S≦0.25 and 2000≦SGr≦30000 (42), the plate surface roughness, for example, the average surface roughness (Ra),
The type of lubricating oil, pressing conditions, etc. may be arbitrary.
なお、本発明における規則的な表面粗度パターンの効果
としては、鋼板表面凹部にたまった潤滑油が均等に凸部
へと供給されることに起因し、そのため潤滑条件が良好
になるものと考えられる。 ゛さらに凸部の金属接触部
分が規則的に存在することにより、鋼板表面とプレス金
型との摩擦状態も変化しているものと考えられる。The effect of the regular surface roughness pattern in the present invention is thought to be due to the fact that the lubricating oil accumulated in the recesses on the steel plate surface is evenly supplied to the convex parts, which improves the lubrication conditions. It will be done. Furthermore, it is thought that the regular presence of the metal contact portions of the convex portions changes the frictional state between the steel sheet surface and the press die.
また塗装後の鮮映性に関しては、ＳＧｒ≧２０００（ｔ
ｍ２）では塗装後の光の反射状態が向トし、乱反射か減
少することに起因すると考えられるが、詳細は明確では
ない。またＳＧｒ＞３００００ （４２）では、凸部の
潤滑条件が悪くなるため、プレス成形性が劣化するもの
と考えられる。Regarding the sharpness after painting, SGr≧2000(t
In m2), it is thought that this is due to the fact that the state of light reflection after painting is changed and the diffused reflection is reduced, but the details are not clear. Moreover, when SGr>30000 (42), the lubrication conditions of the convex portions become poor, and it is considered that the press formability deteriorates.
〈実施例〉
冷延鋼板にスキンバス圧延（圧下率０．８％）を行なっ
たのち電気亜鉛めっき、電気Ｚｎ−Ｎｉ合金めっきおよ
び電気Ｚｎ −Ｆｅ合金めつきを施した。または、冷延
鋼板に溶融亜鉛めっきを施したのちスキンバス圧延（圧
下率０．８％）を行なった。<Example> A cold-rolled steel sheet was subjected to skin bath rolling (reduction ratio: 0.8%), and then electrolytic zinc plating, electrolytic Zn-Ni alloy plating, and electrolytic Zn-Fe alloy plating were applied. Alternatively, a cold-rolled steel sheet was hot-dip galvanized and then subjected to skin bath rolling (reduction ratio: 0.8%).
ここでスキンバスロールは、ショツトブラストおよびレ
ーザー加工によりダル目っけを行ったものを使用した。The skin bath roll used here had been dulled by shot blasting and laser processing.
めっき鋼板表面粗度は圧延方向について行い、平均表面
粗度Ｒａ、パラメータＳ値を求めた。The surface roughness of the plated steel sheet was measured in the rolling direction, and the average surface roughness Ra and parameter S value were determined.
さらに３次元表面粗度計を用いて、表面粗度中心面にお
ける凸部１個あたりの平均面積（ＳＧｒ）を求めた。Further, using a three-dimensional surface roughness meter, the average area (SGr) per convex portion on the center surface of the surface roughness was determined.
限界絞り比（Ｌ、Ｄ、Ｒ，）は、ポンチ直径３２ｍｍの
金型を用いて深絞りしつる最大素板径ＤＯｆｆｌａｘを
求め、ポンチ直径ｃｔｐとの比から求めた。The critical drawing ratio (L, D, R,) was determined from the maximum blank diameter DOfflax that can be deep drawn using a die with a punch diameter of 32 mm, and the ratio to the punch diameter ctp.
すなわち
絞り条件は、絞り速度１ｓｍ／ｓ、潤滑油は防錆油（オ
イルタイプ）を用い、全て同一条件にて行った。That is, the drawing conditions were all the same, with a drawing speed of 1 sm/s and a rust preventive oil (oil type) used as the lubricating oil.
Ｌ、Ｄ、Ｒ，が２，２０以上だとプレス成形性に優れる
。When L, D, and R are 2.20 or more, press moldability is excellent.
塗装後鮮映性は前述したＤｏｔ値にて求めた。The image clarity after painting was determined using the Dot value described above.
ＤＯＩ値が９０以上で一般に塗装後鮮映性に優れる。When the DOI value is 90 or more, the image clarity after painting is generally excellent.
表１にスキンバスロールのダル目つけ方法、表面粗度、
材料特性を示す。この表から明らかなように、本発明範
囲内にて製造した鋼板は、比較例に比べて優れたプレス
成形性と塗装後鮮映性を示す。Table 1 shows the skin bath roll dulling method, surface roughness,
Indicates material properties. As is clear from this table, the steel sheets manufactured within the scope of the present invention exhibit superior press formability and post-painting sharpness compared to the comparative examples.
〈発明の効果〉
本発明によれば、鋼板表面に規則的な粗度パターンを付
′ｊし、表面粗度中心面における凸部１個あたりの゛ト
均面積を規制することにより、同一材質の鋼板において
もプレス成形性および塗装後の鮮映性が格段に向上し、
その使用範囲が拡がるとともに、表面粗度に無関係にプ
レス成形性の向１−がｉｔ（能となるなど、プレス成形
性および塗装後鮮映性に優れためっき鋼板の製造が可能
となる。<Effects of the Invention> According to the present invention, by imparting a regular roughness pattern to the surface of a steel plate and regulating the uniform area of each convex portion in the center plane of the surface roughness, it is possible to Press formability and image clarity after painting have been significantly improved even for steel plates of
As the range of its use expands, it becomes possible to produce plated steel sheets with excellent press formability and image clarity after coating, such as improved press formability regardless of surface roughness.
第１図は限界絞り比とパラメータＳ値との関係を示すグ
ラフである。
第２図は塗装後の鮮映性とＳＧｒとの関係を示すグラフ
である。
第３図はＤｏｔの数値設定の説明図である。FIG. 1 is a graph showing the relationship between the limit aperture ratio and the parameter S value. FIG. 2 is a graph showing the relationship between image clarity and SGr after painting. FIG. 3 is an explanatory diagram of numerical setting of Dot.
Claims (1)
表わす規則度パラメータＳが少なくとも１方向について
Ｓ≦０．２５で、かつ表面粗度中心面における凸部１個
あたりの平均面積ＳＧｒが ２０００≦ＳＧｒ≦３００００（μｍ＾２）であること
を特徴とするプレス成形性および塗装後鮮映性に優れる
めっき鋼板。 ▲数式、化学式、表等があります▼ ▲数式、化学式、表等があります▼ Ｘｉ：鋼板表面凸部ピーク間距離(1) The regularity parameter S representing the regularity of the plated steel plate surface roughness expressed by the following formula is S≦0.25 in at least one direction, and the average area SGr per convex portion on the surface roughness center plane A plated steel sheet having excellent press formability and post-painting sharpness, characterized in that SGr is 2000≦SGr≦30000 (μm^2). ▲There are mathematical formulas, chemical formulas, tables, etc.▼ ▲There are mathematical formulas, chemical formulas, tables, etc.▼ Xi: Distance between peaks of convex parts on the steel plate surface
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61177083A JPH0784675B2 (en) | 1986-07-28 | 1986-07-28 | Plated steel with excellent press formability and image clarity after painting |
| US06/944,679 US4775599A (en) | 1985-12-24 | 1986-12-19 | Cold rolled steel sheets having an improved press formability |
| CN86108640A CN1011121B (en) | 1985-12-24 | 1986-12-23 | Cold rolled steel sheets having improved press formability |
| CA000526166A CA1275154C (en) | 1985-12-24 | 1986-12-23 | Cold rolled steel sheets having an improved press formability |
| DE8686310099T DE3686816T2 (en) | 1985-12-24 | 1986-12-23 | COLD ROLLED STEEL SHEETS WITH GOOD PRESSFORMABILITY. |
| AU66907/86A AU579271B2 (en) | 1985-12-24 | 1986-12-23 | Cold rolled steel sheets having an improved press formability |
| EP86310099A EP0231653B1 (en) | 1985-12-24 | 1986-12-23 | Cold rolled steel sheets having an improved press formability |
| BR8606445A BR8606445A (en) | 1985-12-24 | 1986-12-24 | COLD LAMINATED STEEL SHEETS HAVING CONFORMABILITY UNDER PERFECT PRESSURE |
| KR1019860011229A KR900006655B1 (en) | 1985-12-24 | 1986-12-24 | Cold rolled steel sheets having an improved press formabilty |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61177083A JPH0784675B2 (en) | 1986-07-28 | 1986-07-28 | Plated steel with excellent press formability and image clarity after painting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6333593A true JPS6333593A (en) | 1988-02-13 |
| JPH0784675B2 JPH0784675B2 (en) | 1995-09-13 |
Family
ID=16024828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61177083A Expired - Fee Related JPH0784675B2 (en) | 1985-12-24 | 1986-07-28 | Plated steel with excellent press formability and image clarity after painting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0784675B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02115381A (en) * | 1988-10-25 | 1990-04-27 | Sumitomo Metal Ind Ltd | Surface-treated steel sheet having superior fanciness |
| JPH02145757A (en) * | 1988-11-24 | 1990-06-05 | Kobe Steel Ltd | Alloying galvanized steel sheet |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6321335B1 (en) | 1998-10-30 | 2001-11-20 | Acqis Technology, Inc. | Password protected modular computer method and device |
| US6643777B1 (en) | 1999-05-14 | 2003-11-04 | Acquis Technology, Inc. | Data security method and device for computer modules |
| US6718415B1 (en) | 1999-05-14 | 2004-04-06 | Acqis Technology, Inc. | Computer system and method including console housing multiple computer modules having independent processing units, mass storage devices, and graphics controllers |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5934441A (en) * | 1982-08-19 | 1984-02-24 | Honda Motor Co Ltd | Control method of air-fuel ratio of internal-combustion engine |
| JPS59104201A (en) * | 1982-12-03 | 1984-06-16 | Nippon Kokan Kk <Nkk> | Production of galvanized steel sheet |
-
1986
- 1986-07-28 JP JP61177083A patent/JPH0784675B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5934441A (en) * | 1982-08-19 | 1984-02-24 | Honda Motor Co Ltd | Control method of air-fuel ratio of internal-combustion engine |
| JPS59104201A (en) * | 1982-12-03 | 1984-06-16 | Nippon Kokan Kk <Nkk> | Production of galvanized steel sheet |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02115381A (en) * | 1988-10-25 | 1990-04-27 | Sumitomo Metal Ind Ltd | Surface-treated steel sheet having superior fanciness |
| JPH0548308B2 (en) * | 1988-10-25 | 1993-07-21 | Sumitomo Metal Ind | |
| JPH02145757A (en) * | 1988-11-24 | 1990-06-05 | Kobe Steel Ltd | Alloying galvanized steel sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0784675B2 (en) | 1995-09-13 |
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