JPH04344877A - Al or al alloy plate excellent in spot weldability - Google Patents
Al or al alloy plate excellent in spot weldabilityInfo
- Publication number
- JPH04344877A JPH04344877A JP3114883A JP11488391A JPH04344877A JP H04344877 A JPH04344877 A JP H04344877A JP 3114883 A JP3114883 A JP 3114883A JP 11488391 A JP11488391 A JP 11488391A JP H04344877 A JPH04344877 A JP H04344877A
- Authority
- JP
- Japan
- Prior art keywords
- alloy plate
- spot weldability
- alloy
- plating film
- present
- 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.)
- Pending
Links
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 41
- 238000007747 plating Methods 0.000 claims abstract description 32
- 229910052751 metal Inorganic materials 0.000 claims abstract description 25
- 239000002184 metal Substances 0.000 claims abstract description 25
- 238000002844 melting Methods 0.000 claims abstract description 15
- 230000008018 melting Effects 0.000 claims abstract description 15
- 150000002739 metals Chemical class 0.000 claims abstract description 10
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 7
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 6
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 6
- 229910052725 zinc Inorganic materials 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910052731 fluorine Inorganic materials 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 239000010408 film Substances 0.000 description 32
- 238000003466 welding Methods 0.000 description 28
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000002203 pretreatment Methods 0.000 description 5
- 239000011701 zinc Substances 0.000 description 5
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 4
- 238000005554 pickling Methods 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 230000020169 heat generation Effects 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- WMYWOWFOOVUPFY-UHFFFAOYSA-L dihydroxy(dioxo)chromium;phosphoric acid Chemical compound OP(O)(O)=O.O[Cr](O)(=O)=O WMYWOWFOOVUPFY-UHFFFAOYSA-L 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 210000003660 reticulum Anatomy 0.000 description 1
- POWFTOSLLWLEBN-UHFFFAOYSA-N tetrasodium;silicate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-][Si]([O-])([O-])[O-] POWFTOSLLWLEBN-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Resistance Welding (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、スポット溶接性に優れ
たＡｌまたはＡｌ合金板に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an Al or Al alloy plate having excellent spot weldability.
【０００２】0002
【従来の技術】近年、自動車の軽量化や燃費改善を図る
ため、自動車車体用鋼板として、ＡｌまたはＡｌ合金板
が採用されつつある。2. Description of the Related Art In recent years, Al or Al alloy plates have been increasingly used as steel plates for automobile bodies in order to reduce the weight of automobiles and improve fuel efficiency.
【０００３】ところで、このＡｌまたはＡｌ合金板に対
しては、スポット溶接性の改善が強く望まれている。従
来から自動車車体用鋼板として用いられている軟鋼板に
比較すると、ＡｌまたはＡｌ合金板は、電気伝導度およ
び熱伝導度が高く、かつその表面に強固な酸化被膜が形
成され易いために、スポット溶接を行い難いからである
。By the way, it is strongly desired to improve the spot weldability of this Al or Al alloy plate. Compared to mild steel sheets conventionally used as steel sheets for automobile bodies, Al or Al alloy sheets have higher electrical conductivity and thermal conductivity, and a strong oxide film is easily formed on their surfaces. This is because welding is difficult.
【０００４】従来から、ＡｌまたはＡｌ合金板のスポッ
ト溶接性を向上させるため、スポット溶接の前処理法が
種々検討されてきた。Conventionally, various pretreatment methods for spot welding have been studied in order to improve the spot weldability of Al or Al alloy plates.
【０００５】例えば、比較的簡単な方法として、スポッ
ト溶接を行う前に、ペーパー研磨やワイヤブラシ掛けに
より表面に形成されている酸化被膜を除去する前処理法
が知られているが、この前処理法では酸化被膜の除去の
程度にばらつきが生じ易く、スポット溶接性を所望のレ
ベルに向上させるには不十分である。For example, as a relatively simple method, a pretreatment method is known in which an oxide film formed on the surface is removed by paper polishing or wire brushing before spot welding. This method tends to cause variations in the degree of removal of the oxide film, and is insufficient to improve spot weldability to the desired level.
【０００６】また、スポット溶接を行う前に、リン酸ク
ロメート等による化成処理を施すこと、またはアークの
洗浄作用を利用することにより、酸化被膜を除去し、ス
ポット溶接性を向上させる前処理法も知られているが、
前者の前処理法では効果が不十分であり、後者の前処理
法は自動車車体のスポット溶接工程前に組み入れること
は設備投資が著しく増大することから、実施できない。[0006] In addition, there is also a pretreatment method that removes the oxide film and improves spot weldability by performing chemical conversion treatment with phosphoric acid chromate, etc., or by using the cleaning action of the arc before spot welding. Although it is known,
The former pretreatment method is insufficiently effective, and the latter pretreatment method cannot be implemented before the spot welding process for automobile bodies because it would significantly increase equipment investment.
【０００７】さらに、特公昭５４−４１５５０ 号公報
には、Ａｌ板とＡｌ板との溶接に際し、接合界面に亜鉛
薄膜を被着させておき溶接する方法が開示されている。
しかし、亜鉛の融点は ４２０℃であり、Ａｌの融点（
６６０℃） に比較して低いため、溶接電流を付与する
と、Ａｌ板同士が融解する前に亜鉛薄膜が融解して前記
接合界面に広く拡がり、電流経路が拡大してしまう。こ
のため、この方法では、従来のＡｌ板のスポット溶接よ
り多量の溶接電流を必要とするため、Ａｌ板および電極
との界面の発熱は却って増大し、連続打点性は劣化して
しまう。Furthermore, Japanese Patent Publication No. 54-41550 discloses a method of welding two Al plates together by depositing a thin zinc film on the joint interface. However, the melting point of zinc is 420℃, and the melting point of Al (
660° C.), when a welding current is applied, the zinc thin film melts and spreads widely over the bonding interface before the Al plates melt together, resulting in an enlarged current path. For this reason, this method requires a larger amount of welding current than conventional spot welding of Al plates, so heat generation at the interface between the Al plate and the electrode increases, and the continuous dotting performance deteriorates.
【０００８】[0008]
【発明が解決しようとする課題】ここに、本発明の目的
は、例えば自動車車体用として用いた場合にも、車体溶
接能率を現行の軟鋼板と同程度に維持することができる
スポット溶接性に優れたＡｌまたはＡｌ合金板を提供す
ることにある。[Problems to be Solved by the Invention] An object of the present invention is to provide spot welding properties that can maintain car body welding efficiency at the same level as current mild steel plates even when used for example in automobile bodies. The object of the present invention is to provide an excellent Al or Al alloy plate.
【０００９】[0009]
【課題を解決するための手段】本発明者らは、上記課題
を解決するため種々検討を重ねた結果、ＡｌまたはＡｌ
合金板の片面のみに、融点が７００ ℃以上である金属
のめっき被膜を ０．１ｇ／ｍ２以上４０ｇ／ｍ２以下
施し、このＡｌまたはＡｌ合金板のめっき面が電極と接
するようにしてスポット溶接を行うこと、またはＡｌま
たはＡｌ合金板の両面に融点が７００ ℃以上である金
属めっき被膜を０．１ ｇ／ｍ２以上２０ｇ／ｍ２以下
施しスポット溶接を行うことにより、上記解題を解決す
ることができることを知見した。[Means for Solving the Problems] As a result of various studies in order to solve the above problems, the present inventors have found that Al or Al
A plating film of a metal with a melting point of 700°C or higher is applied to only one side of the alloy plate, and spot welding is performed with the plated surface of this Al or Al alloy plate in contact with the electrode. The above problem can be solved by applying a metal plating film with a melting point of 700 °C or higher on both sides of an Al or Al alloy plate in a thickness of 0.1 g/m2 to 20 g/m2 and spot welding. I found out.
【００１０】本発明者らは、この知見に基づいてさらに
検討を重ねた結果、本発明を完成した。[0010] As a result of further studies based on this knowledge, the present inventors have completed the present invention.
【００１１】ここに、本発明の要旨とするところは、Ａ
ｌまたはＡｌ合金板の片面のみに、融点が ７００℃以
上である金属のめっき被膜を ０．１〜４０ｇ／ｍ２有
することを特徴とするスポット溶接性に優れたＡｌまた
はＡｌ合金板である。また、両面に融点が７００ ℃以
上である金属のめっき被膜を片面あたり０．１ 〜２０
ｇ／ｍ２有することを特徴とするスポット溶接性に優れ
たＡｌまたはＡｌ合金板である。[0011] Here, the gist of the present invention is that A
This is an Al or Al alloy plate with excellent spot weldability, characterized by having a metal plating film with a melting point of 700° C. or higher at a thickness of 0.1 to 40 g/m2 on only one side of the Al or Al alloy plate. In addition, a metal plating film with a melting point of 700°C or higher is applied to both sides at a rate of 0.1 to 20% per side.
This is an Al or Al alloy plate with excellent spot weldability, characterized by having a
【００１２】上記の本発明において、金属とは、Ｃｒ、
Ｍｎ、Ｆｅ、ＣｏおよびＮｉからなる群から選ばれた１
種以上からなる金属や、Ｚｎと、Ｃｒ、Ｍｎ、Ｆｅ、Ｃ
ｏおよびＮｉからなる群から選ばれた１種以上とからな
る金属を例示することができる。[0012] In the above invention, metals include Cr,
1 selected from the group consisting of Mn, Fe, Co and Ni
Metals consisting of more than one species, Zn, Cr, Mn, Fe, C
Examples include metals consisting of one or more selected from the group consisting of O and Ni.
【００１３】また、本発明において、Ａｌとはいわゆる
純Ａｌを意味し、Ａｌ合金とはＡｌを重量％で最も多量
に含有する合金をいう。例えば、本発明におけるＡｌ合
金には、Ａｌ−４．５Ｍｇ 、Ａｌ−５Ｃｕ、Ａｌ−４
Ｃｕ−５Ｓｉ等を包含する。[0013] In the present invention, Al means so-called pure Al, and Al alloy means an alloy containing the largest amount of Al by weight. For example, Al alloys in the present invention include Al-4.5Mg, Al-5Cu, Al-4
Includes Cu-5Si and the like.
【００１４】[0014]
【作用】以下、本発明を作用効果とともに詳述する。[Function] The present invention will be described in detail below along with its functions and effects.
【００１５】本発明の第１の要点は、ＡｌまたはＡｌ合
金板の表面に金属のめっきを施すことにある。Ａｌまた
はＡｌ合金板の表面には強固な酸化被膜が形成されてお
り、これが接触抵抗を高めてスポット溶接性を低下させ
る。酸洗等を行ってこの酸化被膜を除去しても、スポッ
ト溶接するまでの保管期間中に再び表面に酸化被膜が生
成し酸洗の効果を減じてしまう。そこで、本発明では酸
洗を行って酸化被膜を除去した直後に金属のめっきを行
い、ＡｌまたはＡｌ合金板の表面に金属めっき被膜を形
成することにより、保管期間中における酸化被膜の再生
を防ぐことができる。The first point of the present invention is to apply metal plating to the surface of an Al or Al alloy plate. A strong oxide film is formed on the surface of the Al or Al alloy plate, which increases contact resistance and reduces spot weldability. Even if this oxide film is removed by pickling or the like, the oxide film will form again on the surface during the storage period until spot welding, reducing the effectiveness of pickling. Therefore, in the present invention, metal plating is performed immediately after the oxide film is removed by pickling to form a metal plating film on the surface of the Al or Al alloy plate, thereby preventing the oxide film from regenerating during the storage period. be able to.
【００１６】めっきの方法は限定する必要はないが、特
に、電気めっき、化学めっき、蒸着めっきさらには真空
蒸着めっき等が生産性の観点からは望ましい。Although there is no need to limit the plating method, electroplating, chemical plating, vapor deposition plating, and vacuum vapor deposition plating are particularly desirable from the viewpoint of productivity.
【００１７】本発明の第２の要点は、前記めっき被膜の
融点を ７００℃以上と限定することである。めっき被
膜の融点が ７００℃未満である場合には、スポット溶
接時にめっき被膜が融解し、電流通路を拡大してスポッ
ト溶接性を低下させるとともに融解しためっき被膜の構
成金属が電極表面に浸透して脆い金属間化合物を形成し
電極の損耗を早めるからである。これに対し、融点が
７００℃以上のめっき被膜はスポット溶接時の発熱によ
っても融解する危険性が無いため、前記問題の発生を防
止することができる。The second point of the present invention is to limit the melting point of the plating film to 700° C. or higher. If the melting point of the plating film is less than 700°C, the plating film will melt during spot welding, expanding the current path and reducing spot weldability, and the constituent metals of the melted plating film will penetrate into the electrode surface. This is because brittle intermetallic compounds are formed and the electrode wears out more quickly. On the other hand, the melting point
Since there is no danger that a plating film heated to 700° C. or higher will melt due to heat generated during spot welding, the above problem can be prevented from occurring.
【００１８】本発明の第３の要点は、片面のみにめっき
したＡｌ板の場合、めっき付着量を ０．１ｇ／ｍ２以
上４０ｇ／ｍ２以下とすることにある。めっき付着量が
０．１ ｇ／ｍ２未満の場合には、ＡｌまたはＡｌ合金
板の表面の被覆が十分ではなく、ミクロ的に見ると前記
表面が露出し、極めて容易に酸化されてしまうためにス
ポット溶接性の向上効果は充分には得られない。一方、
経済的な観点から、上限は４０ｇ／ｍ２とする。The third point of the present invention is that in the case of an Al plate plated on only one side, the amount of plating deposited is 0.1 g/m 2 or more and 40 g/m 2 or less. If the amount of plating is less than 0.1 g/m2, the surface of the Al or Al alloy plate will not be covered sufficiently, and from a microscopic perspective, the surface will be exposed and oxidized extremely easily. The effect of improving spot weldability cannot be sufficiently obtained. on the other hand,
From an economic point of view, the upper limit is 40 g/m2.
【００１９】第４の要点は、両面にめっきしたＡｌ板の
場合、めっき付着量を片面あたり０．１〜２０ｇ／ｍ２
とすることにある。０．１ ｇ／ｍ２未満の場合は、Ａ
ｌまたはＡｌ合金板の表面の被覆が十分ではなく、ミク
ロ的にみると前記表面が露出し、極めて容易に酸化され
てしまうため溶接性向上の効果は十分に見られない。片
面当り２０ｇ／ｍ２より付着量が多いと電極に接しない
面のめっき被膜が溶接時に容易にとけないため、Ａｌ板
自身は溶接されずに飛散してしまう。The fourth point is that in the case of an Al plate plated on both sides, the coating weight should be 0.1 to 20 g/m2 per side.
It is to do so. If it is less than 0.1 g/m2, A
The surface of the L or Al alloy plate is not sufficiently covered, and from a microscopic perspective, the surface is exposed and is extremely easily oxidized, so that the effect of improving weldability cannot be seen sufficiently. If the amount of adhesion is more than 20 g/m2 per side, the plating film on the side not in contact with the electrode will not be easily melted during welding, so the Al plate itself will not be welded and will scatter.
【００２０】このように、片面のみにあるいは両面に融
点が ７００℃以上である金属のめっき被膜をそれぞれ
片面当り ０．１〜４０ｇ／ｍ２および０．１ 〜２０
ｇ／ｍ２有する本発明にかかるＡｌまたはＡｌ合金板は
、その表面に適度な導電性を有するめっき被膜を有し、
溶接時に溶接電流を付与してもめっき被膜が融解するこ
とがないため、溶接時を通じて接触抵抗値の変化が少な
く、優れたスポット溶接性を維持することができる。[0020] In this way, a metal plating film with a melting point of 700°C or higher is applied to only one side or both sides at a rate of 0.1 to 40 g/m2 and 0.1 to 20 g/m2 per side, respectively.
g/m2, the Al or Al alloy plate according to the present invention has a plating film with appropriate conductivity on its surface,
Since the plating film does not melt even when welding current is applied during welding, there is little change in contact resistance throughout welding, and excellent spot weldability can be maintained.
【００２１】ここで、融点が ７００℃以上である金属
のめっき被膜を構成する金属とは、例えばＣｒ、Ｍｎ、
Ｆｅ、ＣｏおよびＮｉからなる群から選ばれた１種以上
からなる金属や、Ｚｎと、Ｃｒ、Ｍｎ、Ｆｅ、Ｃｏおよ
びＮｉからなる群から選ばれた１種以上とからなる金属
を例示することができる。[0021] Here, the metals constituting the metal plating film having a melting point of 700°C or higher include, for example, Cr, Mn,
Examples include metals consisting of one or more selected from the group consisting of Fe, Co and Ni, and metals consisting of Zn and one or more selected from the group consisting of Cr, Mn, Fe, Co and Ni. Can be done.
【００２２】これらの金属は、Ａｌより不活性であり、
例えば防錆油等により表面を保護するだけでめっき被膜
の表面における酸化被膜の形成を防止するため、酸化被
膜の形成に起因したスポット溶接性の低下を防止できる
。
なお、前記金属の組成は、めっき被膜に要求する加工性
、耐食性、Ａｌとの電食防止等の観点から適宜決定すれ
ばよい。These metals are more inert than Al;
For example, simply protecting the surface with antirust oil or the like prevents the formation of an oxide film on the surface of the plating film, thereby preventing a decrease in spot weldability due to the formation of the oxide film. The composition of the metal may be appropriately determined from the viewpoints of workability, corrosion resistance, prevention of electrolytic corrosion with Al, etc. required for the plating film.
【００２３】なお、片面のみにめっきをする本発明にか
かるＡｌまたはＡｌ合金板において、融点７００ ℃以
上であってＡｌよりも不活性な金属のめっき被膜は、ス
ポット溶接の際の電極表面と接触した場合には前述のよ
うな優れた結果をもたらすが、めっき面同士が接するよ
うにしてスポット溶接を行うと、めっき被膜が溶融せず
接合が不十分になることがある。そこで、本発明にかか
るＡｌまたはＡｌ合金板の接合時の状況を示す図１（ａ
）および図１（ｂ）から明らかなように、片面のみのめ
っきを行い、非めっき面同士を接するようにしてスポッ
ト溶接を行うことが望ましい。なお、図１（ａ）は２枚
のＡｌまたはＡｌ合金板を接合する状況を、図１（ｂ）
はヘミングされたパネル端部の接合状況を示す。非めっ
き面同士の接合界面は、電極−めっき面の接合界面より
も接触抵抗が高く、発熱が非めっき面同士の接合界面に
集中して効率が高まるとともに、電極−めっき面の接合
界面の発熱が抑えられて、電極の長寿命化をもたらすか
らである。[0023] In the Al or Al alloy plate according to the present invention, which is plated only on one side, the plating film of a metal with a melting point of 700°C or higher and more inert than Al will not come into contact with the electrode surface during spot welding. In this case, the above-mentioned excellent results are obtained, but if spot welding is performed with the plated surfaces in contact with each other, the plated film may not melt and the bond may become insufficient. Therefore, FIG. 1 (a
) and FIG. 1(b), it is desirable to perform plating on only one side and perform spot welding with the non-plated surfaces in contact with each other. Note that Fig. 1(a) shows the situation in which two Al or Al alloy plates are joined, and Fig. 1(b) shows the situation in which two Al or Al alloy plates are joined.
shows the connection status of hemmed panel edges. The bonding interface between the non-plated surfaces has a higher contact resistance than the bonding interface between the electrode and the plated surface, and heat generation is concentrated at the bonding interface between the non-plated surfaces, increasing efficiency, and the heat generation at the bonding interface between the electrode and the plated surface increases. This is because it suppresses this and prolongs the life of the electrode.
【００２４】さらに、本発明を実施例を参照しながら説
明するが、これはあくまでも本発明の例示であって、こ
れにより本発明が限定されるものではない。Further, the present invention will be explained with reference to Examples, but these are merely illustrative of the present invention and are not intended to limit the present invention.
【００２５】[0025]
【実施例】自動車用ボンネットに使用される板厚 １．
０ｍｍのＡｌ−４．５ ％Ｍｇ合金の冷延調質板を下記
に示す工程・条件で前処理した。[Example] Plate thickness used for automobile bonnets 1.
A 0 mm cold-rolled tempered plate of Al-4.5% Mg alloy was pretreated using the steps and conditions shown below.
【００２６】（ｉ）アルカリ脱脂・・・オルソ珪酸ソー
ダ７％水溶液
浴温：８０℃
陰極電解：６秒
（ｉｉ）水洗
（ｉｉｉ） 酸洗・・・・・・塩酸８％水溶液（ｉｖ）
水洗
前処理されたＡｌ合金板を、各種めっき条件にてめっき
し、表１および表２に示すめっき被膜を得た。このめっ
きされたＡｌ合金板を３相整流式スポット溶接機により
溶接した。このときの溶接電流は２２０００Ａ、溶接時
間は７サイクル、加圧力は３００ｋｇｆで一定とした。
また、片面めっき材はめっき面を電極側として、スポッ
ト溶接を行った。結果を表１および表２に示す。(i) Alkaline degreasing...7% aqueous solution of sodium orthosilicate Bath temperature: 80°C Cathode electrolysis: 6 seconds (ii) Washing with water (iii) Pickling...8% aqueous solution of hydrochloric acid (iv)
The pre-washed Al alloy plates were plated under various plating conditions to obtain the plating films shown in Tables 1 and 2. This plated Al alloy plate was welded using a three-phase rectifier spot welder. At this time, the welding current was 22,000 A, the welding time was 7 cycles, and the pressing force was constant at 300 kgf. For single-sided plated materials, spot welding was performed with the plated surface facing the electrode. The results are shown in Tables 1 and 2.
【００２７】[0027]
【表１】[Table 1]
【００２８】[0028]
【表２】[Table 2]
【００２９】表１および表２から明らかなように、本発
明にかかるＡｌまたはＡｌ合金板は優れたスポット溶接
性を示し、現在多用される軟鋼板のスポット溶接性と同
程度の特性を示すことが明らかである。As is clear from Tables 1 and 2, the Al or Al alloy plate according to the present invention exhibits excellent spot weldability, and exhibits properties comparable to the spot weldability of mild steel plates that are currently widely used. is clear.
【００３０】[0030]
【発明の効果】以上詳述したように、本発明により、例
えば自動車車体にＡｌまたはＡｌ合金板を採用した場合
にも、組み立て能率を現行の軟鋼板並に維持することを
可能とするスポット溶接性に優れたＡｌまたはＡｌ合金
板を提供することが可能となった。[Effects of the Invention] As detailed above, the present invention provides spot welding that makes it possible to maintain assembly efficiency comparable to that of current mild steel plates even when Al or Al alloy plates are used in automobile bodies, for example. It has now become possible to provide an Al or Al alloy plate with excellent properties.
【００３１】したがって、製造コストの上昇を防いで、
ＡｌまたはＡｌ合金板からなる自動車車体を製造するこ
とが可能となった。[0031] Therefore, while preventing an increase in manufacturing costs,
It has become possible to manufacture automobile bodies made of Al or Al alloy plates.
【００３２】かかる効果を有する本発明の意義は極めて
著しい。The significance of the present invention having such effects is extremely significant.
【図１】本発明にかかるスポット溶接性に優れたＡｌま
たはＡｌ合金板のスポット溶接時における構成図であり
、図１（ａ）は２枚のＡｌまたはＡｌ合金板を接合する
状況を、図１（ｂ）はヘミングされたパネル端部の接合
状況を示す。FIG. 1 is a configuration diagram during spot welding of Al or Al alloy plates with excellent spot weldability according to the present invention, and FIG. 1(a) shows a situation in which two Al or Al alloy plates are joined. 1(b) shows the state of joining of hemmed panel edges.
Claims (4)
融点が ７００℃以上である金属のめっき被膜を ０．
１〜４０ｇ／ｍ２有することを特徴とするスポット溶接
性に優れたＡｌまたはＡｌ合金板。[Claim 1] Only on one side of the Al or Al alloy plate,
A metal plating film with a melting point of 700°C or higher.
An Al or Al alloy plate with excellent spot weldability, characterized by having a weldability of 1 to 40 g/m2.
が７００ ℃以上である金属のめっき被膜を片面あたり
０．１ 〜２０ｇ／ｍ２有することを特徴とするスポッ
ト溶接性に優れたＡｌまたはＡｌ合金板。2. Al or Al with excellent spot weldability, characterized by having a metal plating film with a melting point of 700° C. or higher on each side of 0.1 to 20 g/m2 on both sides of the Al or Al alloy plate. Alloy plate.
およびＮｉからなる群から選ばれた１種以上からなる請
求項１または請求項２記載のスポット溶接性に優れたＡ
ｌまたはＡｌ合金板。3. The metal is Cr, Mn, Fe, Co
A having excellent spot weldability according to claim 1 or 2, comprising one or more selected from the group consisting of
l or Al alloy plate.
ｅ、ＣｏおよびＮｉからなる群から選ばれた１種以上と
からなる請求項１または請求項２記載のスポット溶接性
に優れたＡｌまたはＡｌ合金板。4. The metals include Zn, Cr, Mn, and F.
3. The Al or Al alloy plate with excellent spot weldability according to claim 1 or 2, which comprises one or more selected from the group consisting of Co, Co, and Ni.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3114883A JPH04344877A (en) | 1991-05-20 | 1991-05-20 | Al or al alloy plate excellent in spot weldability |
| EP92102608A EP0500015B1 (en) | 1991-02-18 | 1992-02-17 | Use of plated aluminum sheet having improved spot weldability |
| DE69226974T DE69226974T2 (en) | 1991-02-18 | 1992-02-17 | Use of clad aluminum sheet with improved spot weldability |
| AU11044/92A AU638630B2 (en) | 1991-02-18 | 1992-02-18 | Plated aluminum sheet having improved spot weldability |
| US08/191,356 US5436081A (en) | 1991-02-18 | 1994-02-02 | Plated aluminum sheet having improved spot weldability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3114883A JPH04344877A (en) | 1991-05-20 | 1991-05-20 | Al or al alloy plate excellent in spot weldability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04344877A true JPH04344877A (en) | 1992-12-01 |
Family
ID=14649063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3114883A Pending JPH04344877A (en) | 1991-02-18 | 1991-05-20 | Al or al alloy plate excellent in spot weldability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04344877A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013168238A (en) * | 2012-02-14 | 2013-08-29 | Toyota Industries Corp | Power storage device, vehicle, and method for manufacturing power storage device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5348954A (en) * | 1976-10-18 | 1978-05-02 | Hitachi Netsu Kigu Kk | Resistance welding for aluminum |
| JPS574389A (en) * | 1980-06-11 | 1982-01-09 | Showa Alum Corp | Welding method for aluminum material |
| JPH03146693A (en) * | 1989-10-30 | 1991-06-21 | Sky Alum Co Ltd | Surface-treated aluminum sheet having superior weldability and treatability with zinc phosphate |
| JPH04237576A (en) * | 1991-01-21 | 1992-08-26 | Kawasaki Steel Corp | Aluminum alloy plate having excellent spot weldability |
-
1991
- 1991-05-20 JP JP3114883A patent/JPH04344877A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5348954A (en) * | 1976-10-18 | 1978-05-02 | Hitachi Netsu Kigu Kk | Resistance welding for aluminum |
| JPS574389A (en) * | 1980-06-11 | 1982-01-09 | Showa Alum Corp | Welding method for aluminum material |
| JPH03146693A (en) * | 1989-10-30 | 1991-06-21 | Sky Alum Co Ltd | Surface-treated aluminum sheet having superior weldability and treatability with zinc phosphate |
| JPH04237576A (en) * | 1991-01-21 | 1992-08-26 | Kawasaki Steel Corp | Aluminum alloy plate having excellent spot weldability |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013168238A (en) * | 2012-02-14 | 2013-08-29 | Toyota Industries Corp | Power storage device, vehicle, and method for manufacturing power storage device |
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