JPH05295475A - Al-mg-si alloy material excellent in formability and curing performance for baked finish - Google Patents
Al-mg-si alloy material excellent in formability and curing performance for baked finishInfo
- Publication number
- JPH05295475A JPH05295475A JP4125567A JP12556792A JPH05295475A JP H05295475 A JPH05295475 A JP H05295475A JP 4125567 A JP4125567 A JP 4125567A JP 12556792 A JP12556792 A JP 12556792A JP H05295475 A JPH05295475 A JP H05295475A
- Authority
- JP
- Japan
- Prior art keywords
- alloy material
- alloy
- formability
- subjected
- baking
- 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
- 239000000956 alloy Substances 0.000 title claims abstract description 24
- 229910021365 Al-Mg-Si alloy Inorganic materials 0.000 title abstract description 13
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 238000000576 coating method Methods 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 11
- 229910019094 Mg-S Inorganic materials 0.000 claims 1
- 229910019397 Mg—S Inorganic materials 0.000 claims 1
- 229910045601 alloy Inorganic materials 0.000 abstract description 11
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000005482 strain hardening Methods 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 238000002791 soaking Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 8
- 229910019018 Mg 2 Si Inorganic materials 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 230000032683 aging Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 230000035882 stress Effects 0.000 description 2
- -1 Al-Cr compound Chemical class 0.000 description 1
- 229910018464 Al—Mg—Si Inorganic materials 0.000 description 1
- 229910019064 Mg-Si Inorganic materials 0.000 description 1
- 229910019406 Mg—Si Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、優れた焼付け塗装硬化
性を示し且つ成形加工性の良好なＡｌ−Ｍｇ−Ｓｉ系合
金板に関し、この合金板は例えば自動車用外板材等とし
て有用である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an Al-Mg-Si alloy plate having excellent baking and coating hardenability and good moldability. This alloy plate is useful as, for example, an automobile outer plate material. ..
【０００２】[0002]
【従来の技術】自動車用外板材としては、従来より主と
して冷延鋼板が使用されてきたが、最近、排ガス低減や
燃費削減を目的とする車体軽量化の要求が高まるにつれ
て、Ａｌ合金板の需要が増大してきている。Ａｌ合金板
を自動車用外板材として使用する場合は、プレスや曲げ
等の成形加工が行なわれ、その後最終の外観仕上げのた
め焼付け塗装処理（以下、ベーキングということがあ
る）が行なわれる。2. Description of the Related Art Cold-rolled steel sheets have been mainly used as outer panel materials for automobiles, but recently, as the demand for weight reduction of vehicles for the purpose of reducing exhaust gas and reducing fuel consumption has increased, the demand for Al alloy sheets has increased. Is increasing. When an Al alloy sheet is used as an outer panel material for automobiles, a forming process such as pressing or bending is performed, and then a baking coating process (hereinafter sometimes referred to as baking) is performed for final appearance finish.
【０００３】こうした用途に適したＡｌ合金材として現
在実用化されているのはＡｌ−Ｍｇ−Ｓｉ系合金（例え
ば６００９合金や６０１０合金など）であり、このうち
６００９合金はＭｇ：０．４〜０．８％（重量％：以下
同じ）、Ｓｉ：０．６〜１．０％、Ｃｕ：０．１５〜
０．６％、Ｍｎ：０．２〜０．８％、残部Ａｌおよび不
可避不純物からなり、６０１０合金はＭｇ：０．６〜
１．０％、Ｓｉ：０．８〜１．２％、Ｃｕ：０．１５〜
０．６％、Ｍｎ：０．２〜０．８％、残部Ａｌおよび不
可避不純物からなるものである。Al-Mg-Si alloys (for example, 6009 alloy and 6010 alloy) are currently put into practical use as Al alloy materials suitable for such applications. Of these, 6009 alloy has Mg: 0.4- 0.8% (weight%: the same below), Si: 0.6 to 1.0%, Cu: 0.15
0.6%, Mn: 0.2 to 0.8%, balance Al and unavoidable impurities. 6010 alloy has Mg: 0.6 to 0.6%.
1.0%, Si: 0.8 to 1.2%, Cu: 0.15
0.6%, Mn: 0.2 to 0.8%, balance Al and unavoidable impurities.
【０００４】これらのＡｌ合金は成形性およびベーキン
グ性に優れたものであり、特に２００℃程度の比較的高
い温度でベーキング処理することにより強度が向上する
という特徴を有している。しかし最近では、処理効率向
上のためベーキング条件は次第に低温・短時間化の傾向
にあり、ベーキング温度は１７０℃以下、ベーキング時
間は３０分以内、更には２０分以内に短縮されている。These Al alloys have excellent formability and baking properties, and are characterized in that their strength is improved by baking them at a relatively high temperature of about 200 ° C. However, recently, in order to improve the processing efficiency, the baking conditions tend to be lower temperature and shorter time, the baking temperature is 170 ° C. or less, and the baking time is shortened to 30 minutes or less, further 20 minutes or less.
【０００５】[0005]
【発明が解決しようとする課題】ところが従来の６００
９合金や６０１０合金は、１７０℃程度以下のベーキン
グ温度ではほとんど硬化せず、自動車用外板材等として
実用化する上で大きな障害となっている。本発明は上記
の様な事情に着目してなされたものであって、その目的
は、１７０℃程度以下の低いベーキング温度でも短時間
で硬化し、しかも成形加工性等においても従来のＡｌ合
金材を凌駕する特性を備えたＡｌ合金材を提供しようと
するものである。However, the conventional 600
Alloys 9 and 6010 hardly harden at a baking temperature of about 170 ° C. or less, which is a major obstacle to practical use as an outer panel material for automobiles. The present invention has been made by paying attention to the above circumstances, and an object thereof is to cure in a short time even at a low baking temperature of about 170 ° C. or less, and also to form a conventional Al alloy material. The present invention intends to provide an Al alloy material having characteristics that surpass the above.
【０００６】[0006]
【課題を解決するための手段】上記課題を解決すること
のできた本発明に係るＡｌ−Ｍｇ−Ｓｉ系合金材の構成
は、Ｍｇ：０．３〜０．６％、Ｓｉ：１．５％以下、Ｃ
ｒ：０．１〜０．４％を含有し、且つＭｇとＳｉの含有
量が次式の関係を満たし、 Ｓｉ≧（４／７）Ｍｇ＋０．５ 残部がＡｌと不可避不純物からなるところに要旨を有す
るものである。The composition of the Al-Mg-Si alloy material according to the present invention which has been able to solve the above-mentioned problems is as follows: Mg: 0.3-0.6%, Si: 1.5% Below, C
r: 0.1 to 0.4% is contained, the contents of Mg and Si satisfy the relationship of the following equation, and Si ≧ (4/7) Mg + 0.5 The balance is Al and inevitable impurities. Is to have.
【０００７】[0007]
【作用】まず本発明に係るＡｌ−Ｍｇ−Ｓｉ系合金材の
成分組成を定めた理由について説明する。ＭｇとＳｉ
は、Ｇ．Ｐゾーンと称されるＭｇ2 Ｓｉ組成の集合体
（クラスター）もしくは中間相を形成し、ベーキング処
理による硬化に寄与する重要な元素である。特に低温短
時間のベーキング処理で十分に硬化させるには、上記Ｍ
ｇ2 Ｓｉ組成に対してＳｉを過剰量含有させなければな
らない。即ち硬化に直接寄与するＭｇ2 Ｓｉは、Ｍｇと
Ｓｉの含有量が重量比で７：４となるものであり、たと
えばＭｇ含有量が０．５％でＳｉ含有量が０．３％のと
きは０．８％のＭｇ2 Ｓｉが生成し、当該Ａｌ合金は硬
化すると考えられる。ところが本発明者らが種々研究を
行なったところによると、たとえ理論量のＭｇとＳｉが
含まれていたとしても必ずしも十分な硬化は起こさない
が、Ｍｇ2 Ｓｉを形成する理論量のＭｇとＳｉの量、即
ちＭｇ：Ｓｉ＝７：４に対してＳｉを０．５％以上過剰
に含有させれば、低温短時間のベーキング処理による硬
化が著しく促進されることをつき止めた。これは、過剰
に存在するＳｉがＧ．Ｐゾーンもしくは中間相の核とし
て作用し、Ｍｇ2 Ｓｉの析出を促進する為と考えられ、
過剰Ｓｉ量が０．５％未満ではこうした効果が有効に発
揮されない。この様なところから本発明では、ＭｇとＳ
ｉの含有量に関し［Ｓｉ≧（４／７）Ｍｇ＋０．５］の
要件を定めた。The function of the composition of the Al-Mg-Si alloy material according to the present invention will be described first. Mg and Si
G. It is an important element that forms an aggregate (cluster) of Mg 2 Si composition called P zone or an intermediate phase and contributes to hardening by baking treatment. In particular, in order to sufficiently cure by baking at a low temperature for a short time, the above M
An excessive amount of Si must be contained with respect to the g 2 Si composition. That is, Mg 2 Si that directly contributes to hardening is such that the content ratio of Mg and Si is 7: 4, for example, when the Mg content is 0.5% and the Si content is 0.3%. It is considered that 0.8% of Mg 2 Si is produced and the Al alloy is hardened. However, according to various studies conducted by the present inventors, even if the theoretical amounts of Mg and Si are contained, sufficient hardening does not always occur, but the theoretical amounts of Mg and Si that form Mg 2 Si are not generated. It was found that when the amount of Si, that is, Mg: Si = 7: 4, is excessively contained in Si by 0.5% or more, curing by a baking treatment at low temperature for a short time is significantly accelerated. This is because the excess Si exists in G. It is considered to act as a nucleus of the P zone or the intermediate phase and promote the precipitation of Mg 2 Si.
If the amount of excess Si is less than 0.5%, such effects cannot be effectively exhibited. From such a point, in the present invention, Mg and S
Regarding the content of i, the requirement of [Si ≧ (4/7) Mg + 0.5] was set.
【０００８】またＡｌ中におけるＳｉの固溶限は１．５
％であり、Ｓｉ含有量が１．５％を超えるとＳｉが単独
で析出して成形性を著しく悪化させるので、Ｓｉ含有量
は１．５％以下と定めた。またＭｇについては、その含
有量が０．３％未満ではベーキング処理によって生成す
るＭｇ2 Ｓｉの絶対量が不足するため硬化不足となり、
一方多過ぎると成形性が悪くなるので、Ｍｇ量は０．３
〜０．６％の範囲にしなければならない。The solid solubility limit of Si in Al is 1.5.
%, And when the Si content exceeds 1.5%, Si alone precipitates and remarkably deteriorates the formability, so the Si content was defined as 1.5% or less. As for Mg, if the content is less than 0.3%, the absolute amount of Mg 2 Si produced by the baking treatment is insufficient, resulting in insufficient curing.
On the other hand, if the amount is too large, the formability deteriorates, so the Mg content is 0.3.
Must be in the range of ~ 0.6%.
【０００９】Ｃｒは結晶粒を微細化して成形性を高める
作用があり、０．１％未満ではその作用が有効に発揮さ
れない。しかし多過ぎるとＡｌ−Ｃｒ系化合物が多量生
成して成形性が低下するばかりでなく、ベーキング処理
による硬化も不十分になる傾向があるので、Ｃｒ含有量
は０．１〜０．４％と定めた。[0009] Cr has the effect of refining the crystal grains to improve the formability, and if it is less than 0.1%, the effect is not exhibited effectively. However, if the amount is too large, not only the Al-Cr compound is formed in a large amount to deteriorate the moldability, but also the curing by the baking treatment tends to be insufficient, so that the Cr content is 0.1 to 0.4%. Specified.
【００１０】本発明のＡｌ合金は以上の成分組成を有す
るものであり、殊にＭｇ量に対しやや過剰量のＳｉを含
有させることによって低温短時間のベーキング処理で十
分に硬化する。従ってこうした要件を満たす限り、鋳造
条件や熱間・冷間加工条件等は特に限定されないが、次
に示す様な製造条件を採用すれば、Ａｌ−Ｍｇ−Ｓｉ系
合金板としての特性をより優れたものにすることができ
るので好ましい。即ち好ましい製造条件としては、 インゴットの状態で５００〜５７０℃で４〜４８時間
ソーキング処理することによりインゴット組織を均質化
する、 ソーキング処理の後４００〜５００℃で熱間加工す
る、 熱間加工後、所定の肉厚まで冷間加工する、 冷間加工後５３０℃以上の温度（たとえば５５０℃）
で１時間程度溶体化処理する、 溶体化処理後水焼入れする を順次実施する方法である。尚溶体化処理後の水焼入れ
に代えて、連続焼鈍炉により例えば５５０℃に急速加熱
し、例えば３０秒程度保持してから空冷する方法を採用
した場合でも、十分な性能のＡｌ−Ｍｇ−Ｓｉ系合金材
を得ることができる。The Al alloy of the present invention has the above component composition, and in particular, by containing a slight excess amount of Si relative to the amount of Mg, it is sufficiently hardened by a baking treatment at a low temperature for a short time. Therefore, as long as these requirements are met, casting conditions, hot / cold working conditions, etc. are not particularly limited, but if the following manufacturing conditions are adopted, the characteristics as an Al-Mg-Si alloy plate will be better. It is preferable because it can be prepared. That is, preferable manufacturing conditions include homogenizing the ingot structure by soaking at 500 to 570 ° C. for 4 to 48 hours in an ingot state, hot working at 400 to 500 ° C. after soaking, and hot working Cold working to a predetermined wall thickness, temperature after cold working 530 ℃ or more (eg 550 ℃)
This is a method of sequentially performing solution treatment for about 1 hour, and water quenching after solution treatment. Even when a method of rapid heating to 550 ° C. in a continuous annealing furnace, holding for about 30 seconds, and then air cooling is adopted instead of water quenching after solution treatment, Al—Mg—Si having sufficient performance is used. A system alloy material can be obtained.
【００１１】またこのＡｌ−Ｍｇ−Ｓｉ系合金板は、溶
体化処理後常温時効したものでも優れた特性を示すが、
たとえば１００℃程度で２〜２４時間程度の予備時効処
理を施せば、ベーキング処理による硬化特性を一段と高
めることができるので好ましい。This Al-Mg-Si alloy plate shows excellent characteristics even if it is aged at room temperature after solution treatment.
For example, it is preferable to carry out a pre-aging treatment at about 100 ° C. for about 2 to 24 hours because the curing property by the baking treatment can be further enhanced.
【００１２】[0012]
【発明の効果】本発明は以上の様に構成されており、Ａ
ｌ−Ｍｇ−Ｓｉ系合金の成分組成を特定し、殊にＭｇ含
有量に対してやや過剰量のＳｉを含有させることにより
Ｍｇ2Ｓｉの生成を促進させることによって、比較的低
温短時間のベーキング処理で十分に硬化すると共に成形
加工性にも優れたＡｌ−Ｍｇ−Ｓｉ系合金板を提供し得
ることになった。即ち本発明の合金板は成形加工性及び
焼付け塗装硬化性が非常に優れたものであり、自動車用
外板の如く焼付け塗装して用いられるＡｌ合金材として
極めて実用性の高いものである。次に実施例を挙げて本
発明をより具体的に説明するが、本発明はもとより下記
実施例によって制限を受けるものではない。The present invention is constituted as described above, and A
The composition of the 1-Mg-Si based alloy is specified, and the production of Mg 2 Si is promoted by containing a slight excess amount of Si relative to the Mg content, so that baking at a relatively low temperature and a short time is performed. It has become possible to provide an Al-Mg-Si alloy plate which is sufficiently hardened by the treatment and is excellent in moldability. That is, the alloy sheet of the present invention is very excellent in moldability and curing property by baking coating, and is extremely practical as an Al alloy material to be used by baking coating like an automobile outer plate. Next, the present invention will be described more specifically with reference to examples, but the present invention is not limited by the examples below.
【００１３】[0013]
【実施例】表１に示す組成のＡｌ−Ｍｇ−Ｓｉ系合金を
造塊し、５６０℃で４時間ソーキングした後、熱間圧延
して５ｍｍ厚の板材とし、更に１ｍｍ厚にまで冷間圧延
した。この板材を、塩浴炉で５３０℃×１分間溶体化処
理してから水焼入れし、常温時効処理材（Ｔ４材）を得
た。得られた各Ａｌ−Ｍｇ−Ｓｉ系合金板の成形性およ
び焼付け塗装硬化性を表２に一括して示す。尚成形性
は、Ｔ４状態でエリクセン試験を行なうことによって評
価した。また焼付け塗装硬化性は、溶体化処理および水
焼入れの後直ちに油浴炉で時効処理（１７０℃×２０
分）したものについて、０．２％耐力を測定することに
より評価した。EXAMPLE An Al-Mg-Si alloy having the composition shown in Table 1 was ingoted, soaked at 560 ° C. for 4 hours, hot-rolled to a plate having a thickness of 5 mm, and further cold-rolled to a thickness of 1 mm. did. This plate material was subjected to solution treatment at 530 ° C. for 1 minute in a salt bath furnace and then water-quenched to obtain a room temperature aging treated material (T4 material). Table 2 collectively shows the formability and the baking coating hardenability of each of the obtained Al-Mg-Si alloy plates. The moldability was evaluated by conducting an Erichsen test in the T4 state. In addition, the baking coating curability is determined by aging treatment (170 ° C x 20 ° C) in an oil bath furnace immediately after solution treatment and water quenching.
It was evaluated by measuring 0.2% proof stress.
【００１４】[0014]
【表１】 [Table 1]
【００１５】[0015]
【表２】 [Table 2]
【００１６】表１，２より次の様に考察できる。即ち本
発明の規定要件を満たすＡｌ−Ｍｇ−Ｓｉ系合金（Ｎ
ｏ．１〜５）は成形性（エリクセン値１０ｍｍ以上）、
および焼付け塗装硬化性（時効後０．２％耐力：１７ｋ
ｇｆ／ｍｍ2 以上）のいずれにおいても優れた値を示し
ている。これに対しＮｏ．６はＭｇ量が不足する比較例
であり、成形性は良好であるが焼付け塗装硬化性が極め
て悪い。またＭｇ量が多過ぎる比較例（Ｎｏ．７）、Ｓ
ｉ量が多過ぎる比較例（Ｎｏ．８）、Ｃｒ量が不足する
比較例（Ｎｏ．９）、およびＣｒ量が多過ぎる比較例
（Ｎｏ．１０）は、焼付け塗装硬化性は良好であるが成
形性が極めて悪い。更に過剰Ｓｉ量が０．５％未満であ
る比較例（Ｎｏ．１１）は、成形性は良好であるものの
焼付け塗装硬化性が非常に悪い。また従来材（Ｎｏ．１
２：６００９合金およびＮｏ．１３：６０１０合金）は
成形性および焼付け塗装硬化性のいずれも不良である。The following can be considered from Tables 1 and 2. That is, an Al-Mg-Si alloy (N
o. 1 to 5) are moldability (Erichsen value of 10 mm or more),
And baking coating curability (0.2% proof stress after aging: 17k
gf / mm 2 or more) shows excellent values. On the other hand, No. No. 6 is a comparative example in which the amount of Mg is insufficient, the moldability is good, but the baking coating curability is extremely poor. In addition, a comparative example (No. 7) containing too much Mg, S
The comparative example (No. 8) in which the amount of i is too large, the comparative example (No. 9) in which the amount of Cr is insufficient, and the comparative example (No. 10) in which the amount of Cr is too large have good baking coating curability. Moldability is extremely poor. Further, in the comparative example (No. 11) in which the amount of excess Si is less than 0.5%, the moldability is good, but the baking coating curability is very poor. Conventional material (No. 1)
2: 6009 alloy and No. 13: 6010 alloy) is poor in both formability and baking coating curing property.
Claims (1)
する：以下同じ）、Ｓｉ：１．５％以下、Ｃｒ：０．１
〜０．４％を含有し、且つＭｇとＳｉの含有量が次式の
関係を満たし、 Ｓｉ≧（４／７）Ｍｇ＋０．５ 残部がＡｌと不可避不純物からなることを特徴とする成
形加工性及び焼付け塗装硬化性に優れたＡｌ−Ｍｇ−Ｓ
ｉ系合金材。1. Mg: 0.3 to 0.6% (meaning weight%: the same applies hereinafter), Si: 1.5% or less, Cr: 0.1
To 0.4%, the contents of Mg and Si satisfy the relationship of the following formula, and Si ≧ (4/7) Mg + 0.5 The balance is Al and inevitable impurities. And Al-Mg-S with excellent baking coating curability
i-based alloy material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4125567A JPH05295475A (en) | 1992-04-17 | 1992-04-17 | Al-mg-si alloy material excellent in formability and curing performance for baked finish |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4125567A JPH05295475A (en) | 1992-04-17 | 1992-04-17 | Al-mg-si alloy material excellent in formability and curing performance for baked finish |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05295475A true JPH05295475A (en) | 1993-11-09 |
Family
ID=14913392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4125567A Pending JPH05295475A (en) | 1992-04-17 | 1992-04-17 | Al-mg-si alloy material excellent in formability and curing performance for baked finish |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05295475A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6334916B1 (en) | 1998-09-10 | 2002-01-01 | Kobe Steel Ltd. | A1-Mg-Si based alloy sheet |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03294456A (en) * | 1990-04-13 | 1991-12-25 | Kobe Steel Ltd | Production of aluminum alloy sheet excellent in formability and baking hardenability |
| JPH05125505A (en) * | 1991-10-31 | 1993-05-21 | Furukawa Alum Co Ltd | Manufacture of baking hardenability aluminum alloy plate for forming |
-
1992
- 1992-04-17 JP JP4125567A patent/JPH05295475A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03294456A (en) * | 1990-04-13 | 1991-12-25 | Kobe Steel Ltd | Production of aluminum alloy sheet excellent in formability and baking hardenability |
| JPH05125505A (en) * | 1991-10-31 | 1993-05-21 | Furukawa Alum Co Ltd | Manufacture of baking hardenability aluminum alloy plate for forming |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6334916B1 (en) | 1998-09-10 | 2002-01-01 | Kobe Steel Ltd. | A1-Mg-Si based alloy sheet |
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