JPH04361879A - Aluminum sheet excellent in press formability, spot weldability and chemical conversion treatability and its manufacture - Google Patents
Aluminum sheet excellent in press formability, spot weldability and chemical conversion treatability and its manufactureInfo
- Publication number
- JPH04361879A JPH04361879A JP13307291A JP13307291A JPH04361879A JP H04361879 A JPH04361879 A JP H04361879A JP 13307291 A JP13307291 A JP 13307291A JP 13307291 A JP13307291 A JP 13307291A JP H04361879 A JPH04361879 A JP H04361879A
- Authority
- JP
- Japan
- Prior art keywords
- chemical conversion
- press formability
- spot weldability
- plate
- aluminum sheet
- 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.)
- Withdrawn
Links
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 22
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 21
- 239000000126 substance Substances 0.000 title claims abstract description 21
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- 239000011701 zinc Substances 0.000 claims abstract description 24
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 17
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 230000003746 surface roughness Effects 0.000 claims abstract description 5
- 238000007747 plating Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 18
- 230000003647 oxidation Effects 0.000 claims description 8
- 238000007254 oxidation reaction Methods 0.000 claims description 8
- 238000007654 immersion Methods 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract description 14
- 229910019142 PO4 Inorganic materials 0.000 abstract 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 abstract 1
- 239000010452 phosphate Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 18
- 239000003921 oil Substances 0.000 description 11
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 10
- 239000000243 solution Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- ONDPHDOFVYQSGI-UHFFFAOYSA-N zinc nitrate Chemical compound [Zn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ONDPHDOFVYQSGI-UHFFFAOYSA-N 0.000 description 8
- 239000007864 aqueous solution Substances 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- 229910001335 Galvanized steel Inorganic materials 0.000 description 5
- 239000008397 galvanized steel Substances 0.000 description 5
- 239000011787 zinc oxide Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 229910052593 corundum Inorganic materials 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 229910001845 yogo sapphire Inorganic materials 0.000 description 4
- 238000005275 alloying Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000010960 cold rolled steel Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 238000010422 painting Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- DIZZIOFQEYSTPV-UHFFFAOYSA-N [I].CO Chemical compound [I].CO DIZZIOFQEYSTPV-UHFFFAOYSA-N 0.000 description 2
- 239000003929 acidic solution Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 2
- 239000004327 boric acid Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 238000004611 spectroscopical analysis Methods 0.000 description 2
- 229910018134 Al-Mg Inorganic materials 0.000 description 1
- 229910018182 Al—Cu Inorganic materials 0.000 description 1
- 229910018467 Al—Mg Inorganic materials 0.000 description 1
- 229910018464 Al—Mg—Si Inorganic materials 0.000 description 1
- 229910017813 Cu—Cr Inorganic materials 0.000 description 1
- 238000004566 IR spectroscopy Methods 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000007772 electroless plating Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、プレス成形性、スポッ
ト溶接性および化成処理性に優れたアルミニウム板およ
びその製造法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aluminum plate having excellent press formability, spot weldability and chemical conversion treatment properties, and a method for manufacturing the same.
【０００２】0002
【従来の技術】最近、アルミニウム板（以下Ａｌ板とい
う）の自動車材、建材への適用が多くなっている。Ａｌ
板のこのような用途においては、プレス成形、スポット
溶接による接合や塗装処理が不可欠であるが、亜鉛めっ
き鋼板や冷延鋼板に比べて、プレス成形性、溶接性に劣
り、また塗装処理ラインにおいて、亜鉛めっき鋼板や冷
延鋼板用の化成処理液を兼用すると、Ａｌ板のＡｌの一
部が処理液内へ溶出混入し、悪影響を及ぼす等の欠点を
伴うものである。BACKGROUND OF THE INVENTION Recently, aluminum plates (hereinafter referred to as Al plates) have been increasingly applied to automobile materials and building materials. Al
For such uses of sheets, joining by press forming, spot welding, and painting are essential, but compared to galvanized steel sheets and cold-rolled steel sheets, press formability and weldability are inferior, and it is difficult to use in painting processing lines. If a chemical conversion treatment solution for galvanized steel sheets or cold-rolled steel sheets is also used, some of the Al from the Al sheet will be eluted and mixed into the treatment solution, resulting in disadvantages such as adverse effects.
【０００３】Ａｌ板のプレス成形性を向上させる手段と
して、表面に各種の高粘度の潤滑油を塗布する方法が一
般的に広く採り入れられている。しかし、この方法は、
プレス成形前に潤滑油を塗布する作業、プレス成形後に
脱脂する作業が必要である。そのため、コスト高になる
ほか、プレス作業場の環境を悪くするなどの問題がある
。また、Ａｌ板のスポット溶接性および化成処理性は、
亜鉛めっき鋼板や冷延鋼板に比べて著しく悪く、その抜
本的な改善に対する期待は大きい。[0003] As a means of improving the press formability of an Al plate, a method of applying various high-viscosity lubricating oils to the surface is generally widely adopted. However, this method
It is necessary to apply lubricating oil before press forming, and to degrease after press forming. Therefore, there are problems such as not only increasing costs but also worsening the environment of the press workplace. In addition, the spot weldability and chemical conversion treatment properties of the Al plate are as follows:
It is significantly worse than galvanized steel sheets and cold-rolled steel sheets, and there are high expectations for drastic improvements.
【０００４】0004
【発明が解決しようとする課題】本発明はこのような要
求を有利に解決するためになされたもので、プレス成形
時のプレス破断を大幅に改善できるＡｌ板、スポット溶
接性および化成処理性に優れたＡｌ板およびその製造法
を提供することを課題とするものである。OBJECTS OF THE INVENTION The present invention has been made to advantageously solve these demands, and provides an Al plate that can significantly improve press breakage during press forming, and has excellent spot weldability and chemical conversion treatment properties. It is an object of the present invention to provide an excellent Al plate and a method for manufacturing the same.
【０００５】[0005]
【課題を解決するための手段】本発明の要旨とするとこ
ろは、下記のとおりである。
（１） 表面粗度のＷｃａが０．６μｍ以下で、Ｒａ
が０．３〜１．５μｍであるプレス成形性、スポット溶
接性および化成処理性に優れたアルミニウム板。
（２） アルミニウム表面に亜鉛系めっき皮膜を０．
０５〜１０ｇ／ｍ２（片面あたり）生成させてなる請求
項１記載のプレス成形性、スポット溶接性および化成処
理性に優れたアルミニウム板。[Means for Solving the Problems] The gist of the present invention is as follows. (1) Surface roughness Wca is 0.6 μm or less, Ra
An aluminum plate having an excellent press formability, spot weldability, and chemical conversion treatment property with a diameter of 0.3 to 1.5 μm. (2) 0.0% zinc-based plating film is applied to the aluminum surface.
2. The aluminum plate according to claim 1, wherein the aluminum plate is produced by producing 0.05 to 10 g/m2 (per side).
【０００６】（３） 表面にＺｎＯ酸化物を２０〜３
０００ｍｇ／ｍ２（片面あたり）生成させてなる請求項
１または２記載のプレス成形性、スポット溶接性および
化成処理性に優れたアルミニウム板。
（４） 表面を電解酸化、浸漬酸化または塗布酸化処
理により亜鉛を主体とする酸化物を生成させることを特
徴とする請求項３記載のプレス成形性、スポット溶接性
および化成処理性に優れたアルミニウム板の製造方法。(3) ZnO oxide on the surface of 20 to 3
3. The aluminum plate according to claim 1 or 2, wherein the aluminum plate is produced in an amount of 000 mg/m2 (per side) and has excellent press formability, spot weldability, and chemical conversion treatment property. (4) The aluminum having excellent press formability, spot weldability, and chemical conversion treatment properties according to claim 3, wherein the surface is subjected to electrolytic oxidation, immersion oxidation, or coating oxidation treatment to produce an oxide mainly containing zinc. Method of manufacturing the board.
【０００７】プレス成形時に発生する材料の破断は、材
料の破断耐力が材料の流入抵抗力を上回る状態になった
時発生する。材料の流入抵抗力は、材料の持つ変形抵抗
の他、金型のダイスとしわ押さえ板間に発生する摺動抵
抗力から構成される。従って、材料の流入抵抗力を低減
するためには摺動抵抗力を低減させることが効果的であ
る。この摺動抵抗力は、金型と材料が接触する部位にお
いて相対的すべりを伴う時に発生する。摺動抵抗力は材
料表面の凸部（表面うねりの山：Ｗｃａ）が潰される時
の抵抗力と金型と材料が接触する部位の摩擦力によって
構成される。[0007] Breakage of the material that occurs during press forming occurs when the breakage strength of the material exceeds the inflow resistance force of the material. The inflow resistance force of the material is composed of the deformation resistance of the material and the sliding resistance force generated between the die of the mold and the wrinkle holding plate. Therefore, in order to reduce the material inflow resistance force, it is effective to reduce the sliding resistance force. This sliding resistance force occurs when there is relative slippage at the part where the mold and the material come into contact. The sliding resistance force is composed of the resistance force when the convex portions (surface waviness peaks: Wca) on the material surface are crushed and the frictional force at the part where the mold and the material come into contact.
【０００８】本発明者らは、摺動抵抗力の一つの要素で
ある、表面うねりの山を潰す力（表面変形抵抗力）は、
山の変形量の大小と対応し、表面うねりを小さくするこ
とや表面硬さを高くすることにより、変形量を下げ摺動
抵抗力を低下させ得ることから、表面の平滑化および硬
質化が摺動抵抗力を小さくするのに有効な手段であるこ
とを見出した。The present inventors have discovered that the force that crushes the peaks of surface waviness (surface deformation resistance force), which is one element of sliding resistance force, is
Corresponding to the amount of deformation of the mountain, by reducing the surface waviness or increasing the surface hardness, the amount of deformation and sliding resistance can be lowered. We have discovered that this is an effective means of reducing dynamic resistance.
【０００９】上記のごとき、うねりの山の低い（低Ｗｃ
ａ）表面を得るためには、Ａｌ板あるいはめっき原板と
なるＡｌ板の圧延ロールまたはめっき後に行う圧延ロー
ルの表面の低Ｗｃａ化が当然必要となる。そのための圧
延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した
ショットブラスト法などが適する。[0009] As mentioned above, the undulation peaks are low (low Wc).
a) In order to obtain the surface, it is naturally necessary to lower the Wca of the surface of the Al plate or the rolling roll of the Al plate serving as the original plate for plating, or the rolling roll performed after plating. Suitable methods for processing the rolls for this purpose include electric discharge dulling, laser dulling, and shot blasting using a specially manufactured grid.
【００１０】このような方法で得られる表面うねりの山
の高さが、摺動抵抗力に与える影響は、山の高さが低い
程有効である。摺動抵抗力が高い場合、表面破壊（型か
じり）を起こし、成形品の外観品質が大きく阻害される
ことは避けなければならない。このような観点から、一
般的なプレス成形条件（潤滑油：低粘度の防錆油）で型
かじりを起こさないためには、表面うねりの山高さとし
て、Ｗｃａで０．６μｍ以下が必要となる。また、Ａｌ
板は軟質なため、プレス成形工程の搬送過程でしばしば
表面疵が発生する。これを避けるためには、表面の粗度
（Ｒａ）を大きくすることが有効であり、その大きさと
して、Ｒａで０．３μｍ以上が必要となる。Ｒａ値の上
限の１．５μｍはプレス成形品の塗装鮮映性を確保する
ために必要なものである。[0010] The influence of the height of the ridges of the surface waviness obtained by such a method on the sliding resistance is more effective as the height of the ridges is lower. If the sliding resistance is high, it must be avoided that surface destruction (mold galling) occurs and the appearance quality of the molded product is significantly impaired. From this point of view, in order to prevent mold galling under general press molding conditions (lubricating oil: low viscosity anti-rust oil), the height of the surface waviness must be 0.6 μm or less in terms of Wca. . Also, Al
Since the plate is soft, surface flaws often occur during the transportation process during the press molding process. In order to avoid this, it is effective to increase the surface roughness (Ra), and the roughness of the surface needs to be 0.3 μm or more. The upper limit of the Ra value of 1.5 μm is necessary to ensure the paint clarity of the press-molded product.
【００１１】次に、表面を硬質化する手段としては多く
の方法があるが、Ａｌより硬質な成分のめっきはいずれ
も摺動抵抗力を下げる効果があるが、以下に示す酸化膜
の生成と、亜鉛めっき鋼板を多用する自動車の塗装ライ
ンでの亜鉛めっき鋼板とＡｌ板との共用適性化という観
点から、亜鉛系めっきが最も有利である。本発明の処理
を施す前にＡｌ板表面に存在する酸化膜を洗浄除去する
ことが好ましい。例えば、ＮａＯＨ（１〜５％）水溶液
中に浸漬するかあるいは該水溶液中で電解処理すること
により、Ａｌ２ Ｏ３ 系酸化膜を除去できる。Ａｌ合
金板を洗浄するには、例えば、リン酸ナトリウム系の弱
アルカリ洗浄剤水溶液中での浸漬処理あるいは電解処理
を施すことも好ましい。必要あれば酸洗を加えることも
できる。その後、水洗し、めっき皮膜処理を施すもので
ある。Next, there are many methods for hardening the surface, but plating with a component harder than Al has the effect of lowering the sliding resistance, but it does not prevent the formation of an oxide film as described below. Zinc-based plating is most advantageous from the viewpoint of suitability for co-use of galvanized steel sheets and Al plates in automobile painting lines that frequently use galvanized steel sheets. It is preferable to wash and remove the oxide film present on the surface of the Al plate before performing the treatment of the present invention. For example, the Al2O3-based oxide film can be removed by immersion in an aqueous solution of NaOH (1 to 5%) or by electrolytic treatment in the aqueous solution. In order to clean the Al alloy plate, it is also preferable to perform immersion treatment or electrolytic treatment in, for example, an aqueous solution of a weakly alkaline sodium phosphate cleaning agent. Pickling can be added if necessary. After that, it is washed with water and subjected to plating film treatment.
【００１２】亜鉛系めっき法としては、電気めっき法、
蒸着めっき法、無電解めっき法、溶射法などの各種の製
造方法が挙げられ、めっき組成としては、純Ｚｎの他、
ＺｎとＦｅ、ＺｎとＮｉ、ＺｎとＡｌ、ＺｎとＭｎなど
Ｚｎを主成分として、耐食性など諸機能の向上のため１
種ないし２種以上の合金元素および不純物元素を含み、
またＳｉＯ２ 、Ａｌ２ Ｏ３ などのセラミックス微
粒子、ＴｉＯ２ などの酸化物、有機高分子をめっき層
中に分散させたものがあり、めっき層の厚み方向で単一
組成のもの、連続的あるいは層状に組成が変化するもの
があり、さらに複層めっき鋼板では最上層がＦｅやＮｉ
を主成分としてＺｎ、Ｐなど各種合金元素を含むものが
ある。[0012] As the zinc-based plating method, electroplating method,
Various manufacturing methods include vapor deposition plating, electroless plating, and thermal spraying, and plating compositions include pure Zn,
Zn is the main component, such as Zn and Fe, Zn and Ni, Zn and Al, Zn and Mn, etc., to improve various functions such as corrosion resistance.
Contains a species or two or more alloying elements and impurity elements,
There are also ceramic particles such as SiO2 and Al2O3, oxides such as TiO2, and organic polymers dispersed in the plating layer. Furthermore, in multi-layer plated steel sheets, the top layer may contain Fe or Ni.
There are some containing various alloying elements such as Zn and P with Zn as the main component.
【００１３】このような亜鉛系めっき層の付着量として
は、０．０５〜１０ｇ／ｍ２ が必要となる。付着量が
０．０５ｇ／ｍ２未満であると表面硬質化の効果が発現
しないため、摺動抵抗力の低下には寄与しないこと、化
成処理液へのＡｌの溶出を抑制できないため、化成処理
液の劣化をもたらし、スケの多い化成処理皮膜となるた
め好ましくない。一方、付着量の上限１０ｇ／ｍ２ は
、これを超える付着量の領域では摺動抵抗力の改善効果
が飽和することから、経済的ではないと言う理由による
。[0013] The adhesion amount of such a zinc-based plating layer is required to be 0.05 to 10 g/m2. If the amount of adhesion is less than 0.05 g/m2, the effect of hardening the surface will not be expressed, so it will not contribute to a decrease in sliding resistance, and the elution of Al into the chemical conversion treatment solution cannot be suppressed. This is undesirable because it causes deterioration of the chemical conversion treatment and results in a chemical conversion film with many scratches. On the other hand, the upper limit of the adhesion amount is 10 g/m2 because it is not economical because the effect of improving the sliding resistance is saturated in the area where the adhesion amount exceeds this.
【００１４】摺動抵抗力を支配するもう一つの要素であ
る摩擦力に関しては、材料と金型とが接触する界面に油
膜が存在すると、摩擦力は大幅に低減できることは公知
である。通常、プレス成形には、一次防錆を兼ねて低粘
度の油が使用される。低粘度の油では、金型と材料の接
触面圧が比較的高くなるプレス成形のような場合、容易
に油膜が破壊されて金型と材料の直接接触が発生するこ
とで摩擦力が増大する。このような状態において、摩擦
力の増大を抑制するには、油膜の保持能力が重要である
。このような観点からの調査より、油膜の密着性が表面
の酸化膜の成分と被覆量に大きく依存することを見出し
た。即ち、Ａｌ板の表面にあるＡｌ２ Ｏ３ は非常に
安定な皮膜であるが故に、油膜との密着性が著しく低い
のに反して、Ｚｎ系の酸化膜は油膜との密着性に優れて
いると言うことである。Regarding the frictional force, which is another element governing the sliding resistance force, it is known that the frictional force can be significantly reduced if an oil film is present at the interface where the material and the mold come into contact. Usually, low-viscosity oil is used for press molding, which also serves as primary rust prevention. With low viscosity oil, in cases such as press molding where the contact surface pressure between the mold and material is relatively high, the oil film is easily destroyed and direct contact between the mold and material occurs, increasing frictional force. . In such a state, the ability to retain the oil film is important in order to suppress the increase in frictional force. Through investigation from this perspective, it was found that the adhesion of an oil film largely depends on the components and amount of oxide film on the surface. In other words, since the Al2O3 on the surface of the Al plate is a very stable film, its adhesion to the oil film is extremely low, whereas the Zn-based oxide film has excellent adhesion to the oil film. That's what I say.
【００１５】またＡｌ２ Ｏ３ は皮膜抵抗が高いこと
から、スポット溶接時の電極チップを必要以上に加熱す
ることになり、電極チップ接触径の拡大、ひいては電極
チップ寿命の著しい低下をもたらすのに対して、Ｚｎ系
の酸化膜は、皮膜抵抗が非常に低いことから、電極チッ
プ寿命の改善にも有効なものとなる。さらに、所定の皮
膜量を付与することにより、電極チップとＡｌ板との反
応を抑制することから、さらに電極チップ寿命を改善す
るなどの特徴を示す。[0015] Furthermore, since Al2O3 has a high film resistance, the electrode tip during spot welding is heated more than necessary, resulting in an enlargement of the electrode tip contact diameter and a significant reduction in the electrode tip life. , Zn-based oxide films have extremely low film resistance and are therefore effective in improving the life of electrode tips. Furthermore, by applying a predetermined amount of film, the reaction between the electrode tip and the Al plate is suppressed, which further improves the life of the electrode tip.
【００１６】このような亜鉛系めっき層の表面に形成せ
しめる酸化物としては、酸化物中にＺｎＯの他、例えば
めっき層中に含有する成分元素またはそれらの酸化物な
どの化合物等を含有するものでもよい。また陽極酸化な
どの電気化学処理において、処理液が含有する成分ある
いは化合物を含んでもよい。このような酸化物の生成量
としては、酸化物中のＺｎＯ量（片面あたり）として、
２０〜３０００ｍｇ／ｍ２ が必要である。ＺｎＯ量が
２０ｍｇ／ｍ２ 未満では、表面全体にわたり油膜の密
着性を確保することが困難なため効果が少なく、また３
０００ｍｇ／ｍ２ 超になると化成処理が困難になるた
め好ましくない。[0016] The oxide to be formed on the surface of such a zinc-based plating layer includes, in addition to ZnO, an oxide containing, for example, a component element contained in the plating layer or a compound such as an oxide thereof. But that's fine. Further, in electrochemical treatment such as anodic oxidation, the treatment liquid may contain components or compounds contained in the treatment liquid. The amount of such oxide produced is as follows:
20-3000mg/m2 is required. If the amount of ZnO is less than 20 mg/m2, it is difficult to ensure the adhesion of the oil film over the entire surface, resulting in little effect.
If it exceeds 000 mg/m2, chemical conversion treatment becomes difficult, which is not preferable.
【００１７】次に酸化物形成法としては、Ａｌ板に直接
生成させる場合は、Ａｌ板の表面を洗浄した後、または
Ａｌ板をめっきする場合はめっき後、アルカリまたは酸
性溶液中に浸漬酸化する方法、これら溶液をロールコー
トあるいはスプレーし酸化する方法、そのほかアルカリ
、中性または酸性溶液中で電気化学的に酸化する方法な
ども有効な手段となる。例えば、硝酸亜鉛水溶液との接
触などにより酸化物を生成させる場合は、硝酸亜鉛２０
０〜８００ｇ／ｌの水溶液を０．１〜１０秒間吹きつけ
るか、あるいは該水溶液中に浸漬することににより、Ｚ
ｎＯ主体の酸化物を確実に生成させることができる。
さらに、電解による場合は、上記のごとき硝酸亜鉛水溶
液中で電気量として５〜８０Ｃ／ｄｍ２ 、時間０．１
〜１０秒間、Ａｌ板を陰極として電解処理することによ
り、確実にＺｎＯ主体の酸化物を生成させることができ
る。[0017] Next, as a method for forming oxides, if the oxide is directly formed on the Al plate, the surface of the Al plate is cleaned, or if the Al plate is plated, after plating, the oxide is immersed in an alkaline or acidic solution for oxidation. Other effective methods include a method in which these solutions are oxidized by roll coating or spraying, and a method in which electrochemical oxidation is performed in an alkaline, neutral or acidic solution. For example, when generating an oxide by contacting with a zinc nitrate aqueous solution, zinc nitrate 20
Z
It is possible to reliably generate an oxide mainly composed of nO. Furthermore, in the case of electrolysis, the amount of electricity is 5 to 80 C/dm2 in the above zinc nitrate aqueous solution, and the time is 0.1
By performing the electrolytic treatment for ~10 seconds using the Al plate as a cathode, it is possible to reliably generate a ZnO-based oxide.
【００１８】このような酸化物は、例えば５％ヨウ素メ
タノール溶液でＡｌ板表面またはめっき層を溶解し、抽
出残渣を混合融液（硼酸１、炭酸ナトリウム３）で融解
した後、塩酸で溶液化してＩＣＰで分析した亜鉛量をＺ
ｎＯに換算するか、またはグロー放電分光法（ＧＤＳ）
により測定した最表面から１秒間の酸素積分強度値が１
．０〜１０Ｖ．Ｓ（片面あたり）で、確実に把握するこ
とができる。Such oxides can be obtained by, for example, dissolving the surface of the Al plate or the plating layer with a 5% iodine methanol solution, melting the extraction residue with a mixed melt (1 part of boric acid, 3 parts of sodium carbonate), and then making it into a solution with hydrochloric acid. The amount of zinc analyzed by ICP is
Convert to nO or glow discharge spectroscopy (GDS)
The oxygen integrated intensity value for 1 second from the outermost surface measured by
．． 0~10V. S (per one side) can be accurately grasped.
【００１９】このようにして生成されたＺｎ系酸化膜は
、摺動抵抗力を大きく低下させるだけでなく、スポット
溶接における電極チップ寿命の大幅な改善をもたらす。
即ち、Ａｌ板をスポット溶接により接合しようとすると
、溶接時の発熱によりＡｌ層が溶融状態となり、電極チ
ップ組成の銅とＡｌ金属とが選択的に反応し、硬くて脆
い合金層を形成して、電極加圧力で容易に破壊するため
電極チップが損耗し、電極チップ寿命を短命にすること
になる。しかしながら、電極チップとＡｌ板（めっき層
）との間に亜鉛の酸化物が存在すると、この層は銅とア
ルミニウムの選択的合金化を防止する作用があり、電極
チップの損耗を遅延させる。この理由は、該層により電
極チップとＡｌ板（めっき金属）との接触がたたれ、合
金層の生成による溶損を防止するとともに、さらに酸化
物が電極チップ先端に付着し、堆積して電極チップの保
護膜となり、溶接を継続しても保護膜の厚み、形状には
大きな変化がなく、常時良好な溶接ができ、かつ電極チ
ップの損傷も防止できるためと考えられる。The Zn-based oxide film thus produced not only greatly reduces the sliding resistance but also significantly improves the life of the electrode tip in spot welding. That is, when attempting to join Al plates by spot welding, the Al layer becomes molten due to the heat generated during welding, and the copper in the electrode tip composition reacts selectively with the Al metal, forming a hard and brittle alloy layer. Since the electrode tip is easily destroyed by the pressure applied to the electrode, the electrode tip is worn out and the life of the electrode tip is shortened. However, when zinc oxide is present between the electrode tip and the Al plate (plating layer), this layer has the effect of preventing selective alloying of copper and aluminum, thereby delaying wear of the electrode tip. The reason for this is that the contact between the electrode tip and the Al plate (plated metal) is reduced by the layer, which prevents melting damage caused by the formation of an alloy layer, and furthermore, oxides adhere to the tip of the electrode tip and are deposited on the electrode. This is thought to be because it acts as a protective film for the tip, and even if welding continues, the thickness and shape of the protective film do not change significantly, allowing good welding to be performed at all times and preventing damage to the electrode tip.
【００２０】本発明が適用するＡｌ板はＡｌ−Ｃｕ系、
Ａｌ−Ｍｇ系、Ａｌ−Ｍｇ−Ｓｉ系などのＡｌ合金板を
含むものであり、この他Ｆｅ，Ｍｎ，Ｃｒ，Ｚｎ，Ｔｉ
等の成分が含まれても適用が可能である。[0020] The Al plate to which the present invention is applied is Al-Cu based,
It includes Al alloy plates such as Al-Mg series and Al-Mg-Si series, and also includes Fe, Mn, Cr, Zn, Ti
It can be applied even if components such as the following are included.
【００２１】[0021]
【実施例】本発明の実施例を比較例とともに表１〜５に
示す。[Examples] Examples of the present invention are shown in Tables 1 to 5 together with comparative examples.
【００２２】[0022]
【表１】[Table 1]
【００２３】[0023]
【表２】[Table 2]
【００２４】[0024]
【表３】[Table 3]
【００２５】[0025]
【表４】[Table 4]
【００２６】[0026]
【表５】[Table 5]
【００２７】注１）Ａｌ板：板厚１．０ｍｍ。
注２）Ａｌ板洗浄はＮａＯＨ５％水溶液中で１０Ａ／ｄ
ｍ２ ×２．０秒の電解による。
注３）化成処理用めっき皮膜は、電気めっきにより被覆
した。
注４）硝酸亜鉛水溶液は、Ｚｎ（ＮＯ３ ）・６Ｈ２
Ｏを主成分とし、微量のＨＮＯ３ とＦｅ＋＋＋ を添
加した。
注５）酸化物量の測定は、５％沃素メタノール溶液によ
り、めっき層を溶解し、抽出残渣を混合融剤（硼酸１、
炭酸ナトリウム３）で溶解した後、塩酸で溶液化して亜
鉛の量をＩＣＰ（赤外分光法）で測定した。さらに、表
面のＧＤＳ（グロー放電分光）分析から得られる酸素量
を最表面から１秒間の積分強度の値を酸化膜の酸素強度
とした。
注６）表面うねり（Ｗｃａ）はＪＩＳＢ０６１６に定義
されたもの。
注７）表面あらさ（Ｒａ）はＪＩＳの定義による。
注８）摺動抵抗係数は下記の条件で定量化した。Note 1) Al plate: plate thickness 1.0 mm. Note 2) Al plate cleaning is performed at 10A/d in 5% NaOH aqueous solution.
m2 × 2.0 seconds of electrolysis. Note 3) The plating film for chemical conversion treatment was applied by electroplating. Note 4) Zinc nitrate aqueous solution is Zn(NO3)・6H2
The main component was O, with trace amounts of HNO3 and Fe+++ added. Note 5) To measure the amount of oxide, dissolve the plating layer with a 5% iodine methanol solution, and mix the extraction residue with a mixed flux (boric acid 1,
After dissolving with sodium carbonate 3), it was made into a solution with hydrochloric acid and the amount of zinc was measured by ICP (infrared spectroscopy). Further, regarding the amount of oxygen obtained from GDS (glow discharge spectroscopy) analysis of the surface, the value of the integrated intensity for 1 second from the outermost surface was defined as the oxygen intensity of the oxide film. Note 6) Surface waviness (Wca) is defined in JISB0616. Note 7) Surface roughness (Ra) is as defined by JIS. Note 8) The sliding resistance coefficient was quantified under the following conditions.
【００２８】材料をアセトン溶液で超音波洗浄し、十分
な脱脂を行った後、低粘度の防錆油（パーカー興産（株
）製：ＮＯＸＲＵＳＴ−５３０Ｆ４０／商品名）を片面
あたり１ｇ／ｍ２ 塗布し、図１に示す方法で摺動抵抗
係数を求めた。その測定条件は次の通りである。
１）接触子 ： 直径１０φ、材質ＳＫＤ１１焼き
入れ材
２）負荷荷重（Ｐ）： １ｋｇｆ
３）接触子の移動速度 ： ２．８ｍｍ／ｍｉｎ４
）接触子の移動距離 ： ８０ｍｍ摺動抵抗力は図
１に示すように接触子に取付られたロードセルを介して
計測。計測例を図２に示す。摺動抵抗力は、接触面の摩
擦状態により、辷り距離とともに図のように変動する。
ここでは、摺動抵抗力（Ｆ：ｋｇｆ）を最大と最小の平
均をとり、摺動抵抗係数（Ｒ）を次式で定義した。After the material was ultrasonically cleaned with an acetone solution and thoroughly degreased, a low viscosity rust preventive oil (manufactured by Parker Kosan Co., Ltd.: NOXRUST-530F40/trade name) was applied at a rate of 1 g/m2 per side. , the sliding resistance coefficient was determined by the method shown in FIG. The measurement conditions are as follows. 1) Contact: diameter 10φ, material SKD11 hardened material 2) Applied load (P): 1 kgf 3) Contact moving speed: 2.8 mm/min4
) Distance traveled by the contact: 80mm The sliding resistance force was measured via a load cell attached to the contact as shown in Figure 1. An example of measurement is shown in Figure 2. The sliding resistance varies with the sliding distance as shown in the figure, depending on the friction condition of the contact surfaces. Here, the sliding resistance coefficient (R) was defined by the following formula by taking the average of the maximum and minimum sliding resistance force (F: kgf).
【００２９】Ｒ＝Ｆ／Ｐ
注９）溶接条件は下記による。
１）電極加圧力 ： ２５０ｋｇｆ２）初期加圧力
： ４０サイクル３）通電時間 ： ８サイ
クル
４）保持時間 ： ２サイクル
５）溶接電流 ： １５ＫＡ
６）電極チップ形状 ： 先端径５．０φ（ＣＦ型
：円錐台頭型）
７）電極チップ材質 ： Ｃｕ−Ｃｒ（一般に用い
られているもの）
８）電極チップ寿命終点判定 ：溶接電流でのナゲッ
ト径が４．０ｍｍを確保できる最大の打点数。R=F/P Note 9) Welding conditions are as follows. 1) Electrode pressure: 250kgf2) Initial pressure: 40 cycles 3) Current application time: 8 cycles 4) Holding time: 2 cycles 5) Welding current: 15KA 6) Electrode tip shape: Tip diameter 5.0φ (CF type: conical) 7) Electrode tip material: Cu-Cr (commonly used) 8) Electrode tip life end point determination: Maximum number of dots that can ensure a nugget diameter of 4.0 mm at welding current.
【００３０】溶接は、Ａｌ板の片面を上、他面を下にし
て２枚重ね合わせ連続打点を行った。
注１０）化成処理性の判定は、化成処理液（亜鉛−リン
酸−フッソ系処理浴）に、ＳＤ５０００（日本ペイント
社製）を用い、処方どおり脱脂、表面調整を行った後、
化成処理し評価した。評価法は、ＳＥＭ（２次電子線像
）により、均一に皮膜が形成されているものは合格とし
て○印を、その他のものを不合格として×印とした。[0030] Welding was performed by placing two Al plates one on top of the other with one side up and the other side down, and performing continuous welding. Note 10) Judgment of chemical conversion treatment property is made by using SD5000 (manufactured by Nippon Paint Co., Ltd.) in the chemical conversion treatment solution (zinc-phosphoric acid-fluorinated treatment bath), and after degreasing and surface conditioning as prescribed,
It was chemically treated and evaluated. The evaluation method was determined by SEM (secondary electron beam image), and those in which a film was uniformly formed were marked with a mark ◯, and those in which a film was uniformly formed were marked with an ◯ mark, and those in which the film was otherwise formed were marked with an x mark as a failure.
【００３１】[0031]
【発明の効果】かくすることにより、プレス成形時の材
料の流入抵抗力を大幅に低減することが可能となり、プ
レス成形破断不良現象を低減できる。またスポット溶接
時の電極チップ寿命を大幅に向上することにより、生産
性の向上および品質向上がはかれる。さらに、化成処理
性も向上させることができ、工業的に大きな効果を奏す
るものである。[Effects of the Invention] By doing so, it becomes possible to significantly reduce the inflow resistance force of the material during press molding, and the phenomenon of press molding breakage failure can be reduced. Furthermore, by significantly improving the life of the electrode tip during spot welding, productivity and quality can be improved. Furthermore, chemical conversion treatment properties can also be improved, which has a great industrial effect.
【図１】摺動計測の一例を示す説明図である。FIG. 1 is an explanatory diagram showing an example of sliding measurement.
【図２】摺動計測結果を示す説明図である。FIG. 2 is an explanatory diagram showing sliding measurement results.
Claims (4)
、Ｒａが０．３〜１．５μｍであるプレス成形性、スポ
ット溶接性および化成処理性に優れたアルミニウム板。1. An aluminum plate having surface roughness Wca of 0.6 μm or less and Ra of 0.3 to 1.5 μm, which has excellent press formability, spot weldability, and chemical conversion treatment properties.
を０．０５〜１０ｇ／ｍ２（片面あたり）生成させてな
る請求項１記載のプレス成形性、スポット溶接性および
化成処理性に優れたアルミニウム板。2. The aluminum plate having excellent press formability, spot weldability and chemical conversion treatment properties according to claim 1, wherein a zinc-based plating film is formed on the aluminum surface at 0.05 to 10 g/m 2 (per side).
ｍｇ／ｍ２（片面あたり）生成させてなる請求項１また
は２記載のプレス成形性、スポット溶接性および化成処
理性に優れたアルミニウム板。[Claim 3] 20 to 3000 ZnO oxide on the surface
3. The aluminum plate having excellent press formability, spot weldability and chemical conversion treatment properties according to claim 1 or 2, wherein the aluminum plate is produced in an amount of mg/m2 (per side).
酸化処理により亜鉛を主体とする酸化物を生成させるこ
とを特徴とする請求項３記載のプレス成形性、スポット
溶接性および化成処理性に優れたアルミニウム板の製造
方法。4. The method according to claim 3, wherein the surface is subjected to electrolytic oxidation, immersion oxidation, or coating oxidation treatment to produce an oxide mainly composed of zinc. A method for manufacturing aluminum plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13307291A JPH04361879A (en) | 1991-06-04 | 1991-06-04 | Aluminum sheet excellent in press formability, spot weldability and chemical conversion treatability and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13307291A JPH04361879A (en) | 1991-06-04 | 1991-06-04 | Aluminum sheet excellent in press formability, spot weldability and chemical conversion treatability and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04361879A true JPH04361879A (en) | 1992-12-15 |
Family
ID=15096194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13307291A Withdrawn JPH04361879A (en) | 1991-06-04 | 1991-06-04 | Aluminum sheet excellent in press formability, spot weldability and chemical conversion treatability and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04361879A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008081808A (en) * | 2006-09-28 | 2008-04-10 | Jfe Steel Kk | Steel sheet having excellent chemical conversion treatment property and galling resistance |
| JPWO2013047365A1 (en) * | 2011-09-26 | 2015-03-26 | 日本軽金属株式会社 | Aluminum resin bonded body and manufacturing method thereof |
-
1991
- 1991-06-04 JP JP13307291A patent/JPH04361879A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008081808A (en) * | 2006-09-28 | 2008-04-10 | Jfe Steel Kk | Steel sheet having excellent chemical conversion treatment property and galling resistance |
| JPWO2013047365A1 (en) * | 2011-09-26 | 2015-03-26 | 日本軽金属株式会社 | Aluminum resin bonded body and manufacturing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH02190483A (en) | Galvanized steel sheet having superior press formability | |
| JPH04361879A (en) | Aluminum sheet excellent in press formability, spot weldability and chemical conversion treatability and its manufacture | |
| JPH04325665A (en) | Galvanized steel sheet excellent in press formability and its production | |
| JPH03287786A (en) | Zinc plated steel sheet having superior press formability, chemical convertibility and weldability | |
| JP3106635B2 (en) | Method for producing galvannealed steel sheet with excellent press formability and spot weldability | |
| JP3111888B2 (en) | Manufacturing method of galvanized steel sheet | |
| JPH04333597A (en) | Aluminum sheet excellent press formability, chemical convertibility and weldability | |
| JP3303768B2 (en) | Manufacturing method of galvanized steel sheet | |
| JP3191688B2 (en) | Manufacturing method of galvanized steel sheet | |
| JPH0565623A (en) | Hot-dip galvanized steel sheet excellent in press formability and spot weidability | |
| JP3078473B2 (en) | Aluminum alloy sheet excellent in press workability and spot weldability and method for producing the same | |
| JP3111880B2 (en) | Manufacturing method of galvanized steel sheet | |
| JPH0713308B2 (en) | Galvanized steel sheet with excellent press formability, chemical conversion treatment and weldability | |
| JPH04358095A (en) | Aluminum sheet excellent in spot weldability and its production | |
| JP2665298B2 (en) | Surface treated aluminum plate with excellent spot weldability | |
| JP3129635B2 (en) | Aluminum alloy plate with excellent press workability and spot weldability | |
| JPH05271954A (en) | Al sheet excellent in formability, weldability and corrosion resistance | |
| JP2812616B2 (en) | Aluminum material with excellent spot resistance weldability and workability | |
| JPH09143792A (en) | Production of galvanized steel sheet | |
| JPH05271955A (en) | Aluminum sheet excellent in formability, weldability and corrosion resistance | |
| JP3331951B2 (en) | Manufacturing method of galvanized steel sheet | |
| JPH04323384A (en) | Aluminum sheet or aluminum alloy sheet excellent in spot weldability and its production | |
| JPH06240469A (en) | Ultra-high tensile strength cold rolled steel sheet having high corrosion resistance and high workability and its production | |
| JPH04304383A (en) | Aluminum sheet having superior press formability, chemical treatability and weldability | |
| JPH0790599A (en) | Surface treated aluminum material having excellent workability, spot resistance weldability and corrosion resistance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19980903 |