JP2764176B2 - Continuous annealing furnace incorporating reheating device - Google Patents

Continuous annealing furnace incorporating reheating device

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Publication number
JP2764176B2
JP2764176B2 JP1030857A JP3085789A JP2764176B2 JP 2764176 B2 JP2764176 B2 JP 2764176B2 JP 1030857 A JP1030857 A JP 1030857A JP 3085789 A JP3085789 A JP 3085789A JP 2764176 B2 JP2764176 B2 JP 2764176B2
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JP
Japan
Prior art keywords
temperature
continuous annealing
heating
annealing furnace
reheating
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.)
Expired - Lifetime
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JP1030857A
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Japanese (ja)
Other versions
JPH02209457A (en
Inventor
洋一 小沢
良樹 中村
浩 手塚
一徳 小林
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Kobe Steel Ltd
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Kobe Steel Ltd
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Description

【発明の詳細な説明】 (産業の利用分野) 本発明は連続焼鈍炉に係り、更に詳細には、アルミニ
ウム合金、特にベークハード型アルミニウム合金の熱処
理に適する連続焼鈍炉に関する。
Description: TECHNICAL FIELD The present invention relates to a continuous annealing furnace, and more particularly to a continuous annealing furnace suitable for heat treatment of an aluminum alloy, particularly a bake hard type aluminum alloy.

(従来の技術及び解決しようとする課題) 一般に、アルミニウム合金用の連続焼鈍炉は、第1図
に示すように、巻戻し機1、シャー2、接合機3、緩衝
装置4、加熱装置5、冷却装置6、緩衝装置7、巻取り
機10をこの順序に配置するライン構成を有しているが、
第2の緩衝装置7の出側に矯正機8を設けたり、巻取り
機10の出側に板用フライングシャー11及びパイラー12を
設ける場合もある。
(Conventional technology and problems to be solved) Generally, as shown in FIG. 1, a continuous annealing furnace for an aluminum alloy includes a rewinding machine 1, a shear 2, a joining machine 3, a buffer device 4, a heating device 5, It has a line configuration in which the cooling device 6, the buffer device 7, and the winder 10 are arranged in this order,
The straightening device 8 may be provided on the output side of the second shock absorber 7, or the plate flying shear 11 and the piler 12 may be provided on the output side of the winding machine 10.

このような連続焼鈍炉においてアルミニウム圧延材を
熱処理する場合、経過時間に伴う材料温度の変化の一例
をみるならば、加熱装置において400〜600℃に加熱さ
れ、冷却装置で100℃以下に下げられる。冷却装置で100
℃以下に下げるのは、冷却装置の出側の緩衝装置などに
用いられているロールがゴム又は樹脂でライニングされ
ているので、100℃以上に上げることが難しいためであ
る。したがって、緩衝装置などを経過する間に空中で冷
却されるので、巻取り機では、通常、50℃以下の温度と
なる。
When heat-treating a rolled aluminum material in such a continuous annealing furnace, if an example of the change in the material temperature with the lapse of time is seen, the material is heated to 400 to 600 ° C in the heating device and reduced to 100 ° C or less in the cooling device. . 100 in the cooling device
The reason for lowering the temperature to 100 ° C. or lower is that it is difficult to increase the temperature to 100 ° C. or higher because the roll used for the shock absorber on the outlet side of the cooling device is lined with rubber or resin. Therefore, since it is cooled in the air while passing through the shock absorber and the like, the temperature of the winder is usually 50 ° C. or less.

従来、自動車部品や他の用途に使用されるアルミニウ
ム合金材料に塗装した塗膜に強度をもたせるために、塗
装後加熱(ベーキング)することが行われ、併せてこの
加熱を利用してアルミニウム合金材料の強度を向上させ
ることが行われている。このようなアルミニウム合金材
料としては、6009、6010などが使用されており、そして
塗膜の焼付けは、200℃の如く高い温度で60〜90分程度
保持するという高温長時間処理のため、6009、6010など
は強度が向上する効果があった。
Conventionally, heating (baking) has been performed after coating in order to impart strength to a coating film applied to an aluminum alloy material used for automobile parts and other applications, and the heating is used to make the aluminum alloy material Improving the strength has been performed. As such an aluminum alloy material, 6009, 6010 and the like are used, and the baking of the coating film is performed at a high temperature such as 200 ° C. for about 60 to 90 minutes for a high-temperature long-time treatment. 6010 and the like had the effect of improving strength.

しかし、最近になって、省エネルギー化及びベーキン
グ時のコストダウンのために、ベーキング温度を下げ、
且つ加熱時間を短縮化する傾向にあり、例えば、ベーキ
ング条件として、175℃×30分という低温短時間でも上
記の効果が得られる技術の開発が試みられている。
However, recently, in order to save energy and reduce costs during baking, the baking temperature was lowered,
In addition, there is a tendency that the heating time is shortened. For example, there is an attempt to develop a technique that can obtain the above-mentioned effect even at a low temperature of 175 ° C. × 30 minutes for a short time as a baking condition.

例えば、本件出願人が先に提案(特開昭62−89852
号)したように、特定成分のアルミニウム合金の冷延板
に調質処理(焼入)として、加熱速度100℃/分以上で4
80〜580℃に急速加熱し、この温度に3秒以上保持した
後、100℃までの冷却速度を300℃/分以上で急冷する熱
処理を施した後、更に72時間以内に最終熱処理(40〜12
0℃×8〜36時間)を行う方法がある。この方法によれ
ば、175℃×30分というベーキング処理で優れた焼付け
硬化性が得られる。しかし、その後の研究で、最終熱処
理までの経過時間が長くなると、また、その間の温度が
低いと、効果が少なくなることが判明している。
For example, the applicant of the present application has proposed (Japanese Patent Application Laid-Open No. 62-89852)
No.), as a tempering treatment (quenching) for a cold rolled sheet of aluminum alloy of a specific component, a heating rate of 100 ° C./min or more
After rapidly heating to 80 to 580 ° C and holding at this temperature for 3 seconds or more, performing a heat treatment of quenching at a cooling rate of 300 ° C / min or more to 100 ° C, and then performing a final heat treatment (40 to 12
(0 ° C. × 8 to 36 hours). According to this method, excellent bake hardenability can be obtained by baking at 175 ° C. for 30 minutes. However, subsequent studies have shown that the longer the time elapsed until the final heat treatment, and the lower the temperature during that time, the lower the effect.

例えば、これを実生産において実施するためには、従
来の連続焼鈍炉ではコイル巻取り温度が室温近くに冷え
てしまい、特に冬季においては10℃程度下ってしまう。
そのため、速やかに再加熱することが必要であるが、バ
ッチ炉へ搬入し、入炉し、加熱するまでの時間が長くな
るため、効果がなくなるという問題がある。
For example, in order to carry out this in actual production, the coil winding temperature in a conventional continuous annealing furnace cools down to near room temperature, and in particular, drops by about 10 ° C. in winter.
Therefore, it is necessary to quickly reheat, but there is a problem that the effect is lost because the time required for carrying into the batch furnace, entering the furnace, and heating is long.

本発明は、かゝる従来技術の問題点を解決するために
なされたものであって、アルミニウム合金圧延板、特に
低温短時間のベーキング処理で所期の効果が得られるよ
うな連続熱処理を可能にする技術を提供することを目的
とするものである。
The present invention has been made in order to solve the problems of the related art, and enables continuous heat treatment such that an intended effect can be obtained by baking treatment of a rolled aluminum alloy plate, particularly at a low temperature for a short time. The purpose of the present invention is to provide a technology that makes

(課題を解決するための手段) 本発明者は、先の提案による方法が実生産への適用が
困難であることに鑑みて、連続焼鈍炉での連続熱処理条
件を見い出すべく鋭意研究を重ねた。
(Means for Solving the Problems) In view of the fact that the method according to the above proposal is difficult to apply to actual production, the present inventors have conducted intensive studies to find conditions for continuous heat treatment in a continuous annealing furnace. .

その結果、調質処理(焼入)後、継続して低温加熱を
行えば、例えば175℃×30分という低温短時間のベーキ
ング処理においても強度が向上することを知見した。
As a result, it has been found that if the low-temperature heating is continuously performed after the tempering treatment (quenching), the strength is improved even in a low-temperature short-time baking treatment of, for example, 175 ° C. × 30 minutes.

そこで、本発明者は、従来の連続焼鈍炉を改善して、
ここに焼入(加熱、急冷)→低温加熱という熱処理を連
続的に可能とする連続焼鈍炉を開発し、本発明をなした
ものである。
Therefore, the present inventor has improved the conventional continuous annealing furnace,
Here, a continuous annealing furnace capable of continuously performing a heat treatment of quenching (heating, rapid cooling) → low-temperature heating was developed, and the present invention was made.

すなわち、本発明は、少なくとも巻戻し機、加熱装
置、冷却装置及び巻取り機をこの順序に配置してなるア
ルミニウム圧延板の連続焼鈍炉において、前記冷却装置
の出側と巻取り機との間にアルミニウム圧延板を連続的
に低温加熱する再加熱装置を設けたことを特徴とする再
加熱装置を組込んだ連続焼鈍炉を要旨とするものであ
る。
That is, the present invention relates to a continuous annealing furnace for an aluminum rolled plate in which at least a rewinding device, a heating device, a cooling device, and a winding device are arranged in this order. A continuous annealing furnace incorporating the reheating device, wherein a reheating device for continuously heating the rolled aluminum plate at a low temperature is provided.

以下に本発明を更に詳細に説明する。 Hereinafter, the present invention will be described in more detail.

第2図は本発明に係る連続焼鈍炉の一例を示すライン
構成である。
FIG. 2 is a line configuration showing an example of a continuous annealing furnace according to the present invention.

第2図に示すラインでは、加熱装置5の入側に緩衝装
置4のみが示されているが、緩衝装置4の入側に巻戻し
機、シャー、接合機等を配列すること、並びに加熱装置
5の出側に冷却装置6を配列することは、従来と同様で
ある。また、冷却装置6の出側に緩衝装置7、シャー
9、巻取り機10等々を配列することも、従来と同様であ
る。
In the line shown in FIG. 2, only the buffer device 4 is shown on the input side of the heating device 5, but a rewinding machine, a shear, a joining machine, etc. are arranged on the input side of the buffer device 4, and the heating device Arranging the cooling device 6 on the outlet side of 5 is the same as the conventional one. The arrangement of the buffer device 7, the shear 9, the winding machine 10 and the like on the outlet side of the cooling device 6 is the same as the conventional one.

しかし、本発明では、冷却装置6の出側、すなわち、
冷却装置6と巻取り機10との間に再加熱装置13を設ける
構成とするのである。この再加熱装置13は、加熱装置5
及び冷却装置6により焼入(加熱、冷却)された圧延板
を巻取り前に再加熱するためのものである。
However, in the present invention, the outlet side of the cooling device 6, that is,
The reheating device 13 is provided between the cooling device 6 and the winder 10. This reheating device 13 is provided with a heating device 5
And for reheating the rolled plate quenched (heated and cooled) by the cooling device 6 before winding.

再加熱装置13を設ける個所は、コイル巻取り機10の近
くが最も良い。これは、移送ロールを高温ダメージから
守るため、また巻取りまでに冷却されることが少ないた
めである。図示の場合、緩衝装置7とシャー9の間に設
けられている。しかしながら、場所的な制約などの理由
で、冷却装置6の出側の他の個所、例えば、緩衝装置7
の中に入れることもできる。
The place where the reheating device 13 is provided is best near the coil winder 10. This is because the transfer roll is protected from high-temperature damage and is less likely to be cooled before winding. In the case of illustration, it is provided between the shock absorber 7 and the shear 9. However, due to location constraints and the like, other locations on the exit side of the cooling device 6, for example, the shock absorber 7
You can put it inside.

勿論、冷却装置6と緩衝装置7との間、更には緩衝装
置7の出側に矯正機8を設ける場合にはこの矯正機8の
出側に設けるようにすることもできる。
Of course, when the straightening device 8 is provided between the cooling device 6 and the shock absorber 7, and further on the outlet side of the shock absorber 7, it may be provided on the outlet side of the straightening device 8.

また、再加熱装置13は通常1台であるが、1台でな
く、複数台して、被加熱材を常に限度温度Ty(第5図参
照)以上に保つようにすることも可能である。複数台の
場合には、同一個所に連続して設けても、或いはそれぞ
れを任意の別の個所に設けてもよい。
Although the number of the reheating devices 13 is usually one, it is also possible to keep the temperature of the material to be heated at or above the limit temperature Ty (see FIG. 5) by using a plurality of reheating devices instead of one. In the case of a plurality of units, they may be provided continuously at the same place, or may be provided at any other place.

再加熱装置13は、圧延板(コイル)温度を50〜150℃
程度の低温に加熱する加熱手段を備えたものであればよ
い。加熱手段としては、種々の方法があり、熱風加熱方
法、赤外線ヒーターによる輻射加熱法、誘導コイルによ
る加熱法、ヒートロールによる加熱法、蒸気を吹き付け
法などが挙げられる。勿論、他の加熱方法も可能であ
る。これらの加熱方法にはそれぞれ長所、短所があるの
で、加熱条件等々を考慮して適宜の方法を採用すればよ
い、なお、上記加熱方法の幾つかについて、以下に具体
的に説明する。
The reheating device 13 raises the temperature of the rolled plate (coil) to 50 to 150 ° C.
What is necessary is just to be provided with the heating means which heats to about low temperature. There are various heating methods, such as a hot air heating method, a radiant heating method using an infrared heater, a heating method using an induction coil, a heating method using a heat roll, and a steam spraying method. Of course, other heating methods are possible. Each of these heating methods has advantages and disadvantages. Therefore, an appropriate method may be adopted in consideration of heating conditions and the like. Some of the above-described heating methods will be specifically described below.

熱風加熱方法 バーナーにより燃料を燃焼させ、その燃焼ガスを板表
面に吹き付ける方法であり、経済性に優れるが、ダクト
などによる排気ガスの処理が必要である。電気ヒーター
の使用も可能である。
Hot air heating method This method burns fuel with a burner and sprays the combustion gas onto the plate surface, which is economical, but requires exhaust gas treatment by a duct or the like. The use of electric heaters is also possible.

赤外線ヒーターによる輻射加熱法 コンパクトで場所をとらず、クリーンであるなどの長
所がある。しかし、アルミニウム材料(被処理材)の反
射率が高いので、熱効率が低い。第3図に一例を示すよ
うに、被処理材の通板レベルの上下に赤外線ヒーター14
と反射板15を設ける構成である。
Radiant heating method using infrared heaters It has the advantages of being compact, taking up little space, and being clean. However, since the reflectance of the aluminum material (material to be processed) is high, the thermal efficiency is low. As shown in FIG. 3, an infrared heater 14 is provided above and below the passing level of the material to be processed.
And a reflection plate 15 are provided.

誘導コイルによる加熱法 誘導コイルの中を被処理材を通板させることにより加
熱する方法であり、温度制御が可能である。しかし、設
備投資額が大きくなる欠点がある。
Heating method by induction coil This is a method of heating by passing a material to be processed through the induction coil, and the temperature can be controlled. However, there is a disadvantage that the capital investment amount is large.

(作用) 第2図に示したライン構成の連続焼鈍炉は以下のよう
に作用する。
(Operation) The continuous annealing furnace having the line configuration shown in FIG. 2 operates as follows.

巻取り機より巻戻され、緩衝装置4を介して供給され
るアルミニウム圧延板は、加熱装置5により400〜600℃
まで加熱され、冷却装置6により急速冷却され、出口温
度は50〜100℃程度になる。次いで緩衝装置7を通過す
る間に外気(0〜40℃)により更に冷却され、再加熱装
置13の入側では20〜50℃程度になるので、これを再加熱
(例、50〜150℃)し、コイル巻取り機10で50〜150℃に
て巻取られる。取り出されたコイルは適当な保温方法に
より必要時間、必要な温度にキープされる。
The rolled aluminum plate unwound from the winding machine and supplied through the buffer device 4 is heated at 400 to 600 ° C. by the heating device 5.
, And rapidly cooled by the cooling device 6, and the outlet temperature becomes about 50 to 100 ° C. Next, the air is further cooled by the outside air (0 to 40 ° C.) while passing through the buffer device 7, and reaches about 20 to 50 ° C. at the inlet side of the reheating device 13, and is reheated (eg, 50 to 150 ° C.). Then, it is wound at 50 to 150 ° C. by the coil winder 10. The removed coil is kept at a required temperature for a required time by an appropriate heat retaining method.

なお、本発明を適用可能なアルミニウム材料として
は、ベークハード型アルミニウム合金のみに限られず、
焼入後に引き続き低温加熱する必要がある材質のもので
あることは云うまでもない。
The aluminum material to which the present invention can be applied is not limited to only a bake hard type aluminum alloy,
Needless to say, the material needs to be heated at a low temperature after quenching.

(実施例) 次に本発明の実施例を示す。(Example) Next, an example of the present invention will be described.

実施例1 第2図に示した連続焼鈍炉を使用し、先の提案に係る
アルミニウム合金圧延板(コイル)を熱処理した。
Example 1 Using a continuous annealing furnace shown in FIG. 2, a rolled aluminum alloy plate (coil) according to the above proposal was heat-treated.

第4図に時間の経過に伴う材料温度の変化を示す。 FIG. 4 shows the change in the material temperature over time.

まず、コイルは、外気温度Taで連続焼鈍炉に入り、巻
戻されて加熱装置5によりTM(400〜600℃)まで急速加
熱(100℃/分以上)され、この温度に3秒以上保持し
た後、冷却装置6により急速冷却(100℃までの冷却速
度300℃/分以上)し、T0(50〜100℃程度)になり、更
に空冷され、T1(20〜50℃程度)になる。これを再加熱
装置13により加熱してT2(50〜150℃)に上昇させ、コ
イル巻取り後、必要時間(x時間)、限度温度(Ty)以
上に保持される。
First, the coil enters the continuous annealing furnace at the outside air temperature Ta, is rewound, rapidly heated to T M (400 to 600 ° C.) by the heating device 5 (100 ° C./min or more), and kept at this temperature for 3 seconds or more. After that, it is rapidly cooled by the cooling device 6 (cooling rate up to 100 ° C. of 300 ° C./min or more) to reach T 0 (about 50 to 100 ° C.), and further air-cooled to T 1 (about 20 to 50 ° C.). Become. This is heated by the re-heating device 13 to raise the temperature to T 2 (50 to 150 ° C.), and after winding the coil, the temperature is maintained at a required time (x hours) and a temperature not lower than the limit temperature (Ty).

実施例2 本例は、第5図に示す酔うに、再加熱装置を緩衝装置
に入れた例である。
Embodiment 2 This embodiment is an example in which the reheating device is placed in the shock absorber, as shown in FIG.

この場合の時間の経過に伴う材料温度の変化は、第6
図に示すように、冷却装置出側での温度T0のアルミニウ
ム圧延板は移送と共に空冷されるが、緩衝装置内の再加
熱装置132によりT3に再加熱され、その後、同様に空冷
されるが、別の再加熱装置131によりT4に再加熱され、
コイル巻取り、コイル払出しされる。再加熱温度のT3
T4は同一温度或いは異なる温度のいずれでもよいが、限
度温度以下にならないうちに再加熱する。
In this case, the change in the material temperature with the passage of time is the sixth.
As shown, an aluminum rolled plate of the temperature T 0 in the cooling apparatus outlet side is being cooled with transport, reheated to T 3 by reheating device 13 2 in the buffer device, then air cooled in the same manner that it is, reheated to T 4 by reheating device 13 1 another,
Coil winding and coil dispensing. Reheating temperature T 3
T 4 may be at the same temperature or at a different temperature, but is reheated before the temperature falls below the limit temperature.

(発明の効果) 以上詳述したように、本発明によれば、アルミニウム
圧延板の連続焼鈍において加熱装置、冷却装置の他に再
加熱装置を設けたので、焼入等の加熱、冷却の熱処理後
に引き続き低温加熱が可能となり、特に低温短時間のベ
ーキング処理で所期の効果が得られるような連続焼鈍を
行うことができる。また、従来のライン構成に再加熱装
置を追加するだけでよいので、経済的である。
(Effects of the Invention) As described in detail above, according to the present invention, since a reheating device is provided in addition to a heating device and a cooling device in continuous annealing of a rolled aluminum plate, heat treatment such as quenching and heating is performed. Low-temperature heating can be subsequently performed, and continuous annealing can be performed so that the desired effect can be obtained by baking at a low temperature for a short time. Further, it is economical because only a reheating device needs to be added to the conventional line configuration.

【図面の簡単な説明】[Brief description of the drawings]

第1図は従来の連続焼鈍炉のライン構成を示す図、 第2図は本発明に係る再加熱装置を組み込んだ連続焼鈍
炉のライン構成の一例を示す図、 第3図(a)、(b)は再加熱装置の一例を示す図、 第4図及び第6図は連続焼鈍炉における材料温度の時間
経過に伴う変化を示す図、 第5図は本発明に係る再加熱装置を組み込んだ連続焼鈍
炉のライン構成の他の例を示す図である。 1……巻戻し機、2……シャー、3……接合機、4……
緩衝装置(入側)、5……加熱装置、6……冷却装置、
7……緩衝装置(出側)、8……矯正機、9……シャ
ー、10……巻取り機、11……板用フライングシャー、12
……パイラー、13……再加熱装置、14……赤外線ヒータ
ー、15……反射板。
FIG. 1 is a diagram showing a line configuration of a conventional continuous annealing furnace, FIG. 2 is a diagram showing an example of a line configuration of a continuous annealing furnace incorporating a reheating device according to the present invention, FIG. b) is a diagram showing an example of a reheating device, FIG. 4 and FIG. 6 are diagrams showing changes with time of the material temperature in a continuous annealing furnace, and FIG. 5 is a diagram incorporating a reheating device according to the present invention. It is a figure showing other examples of the line composition of a continuous annealing furnace. 1 ... rewinding machine, 2 ... shear, 3 ... joining machine, 4 ...
Buffer device (entrance side), 5 ... heating device, 6 ... cooling device,
7: shock absorber (outside), 8: straightening machine, 9: shear, 10: winder, 11: flying shear for plate, 12
…… Piler, 13 …… Reheating device, 14 …… Infrared heater, 15 …… Reflector.

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭58−6939(JP,A) 特開 昭62−89852(JP,A) 実開 昭63−177952(JP,U) ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-6939 (JP, A) JP-A-62-89852 (JP, A) Real opening 63-177952 (JP, U)

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】少なくとも巻戻し機、加熱装置、冷却装置
及び巻取り機をこの順序に配置してなるアルミニウム圧
延板の連続焼鈍炉において、前記冷却装置の出側と巻取
り機の間に、巻取り時の温度が50〜150℃となるように
アルミニウム圧延板を連続的に再加熱する再加熱装置を
設けたことを特徴とする再加熱装置を組込んだ連続焼鈍
炉。
1. A continuous annealing furnace for an aluminum rolled plate having at least a rewinding device, a heating device, a cooling device and a winding device arranged in this order, wherein a space between an outlet side of the cooling device and the winding device is provided. A continuous annealing furnace incorporating a reheating device, comprising a reheating device for continuously reheating an aluminum rolled sheet so that the temperature during winding is 50 to 150 ° C.
JP1030857A 1989-02-09 1989-02-09 Continuous annealing furnace incorporating reheating device Expired - Lifetime JP2764176B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
JP1030857A JP2764176B2 (en) 1989-02-09 1989-02-09 Continuous annealing furnace incorporating reheating device

Publications (2)

Publication Number Publication Date
JPH02209457A JPH02209457A (en) 1990-08-20
JP2764176B2 true JP2764176B2 (en) 1998-06-11

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US5718780A (en) 1995-12-18 1998-02-17 Reynolds Metals Company Process and apparatus to enhance the paintbake response and aging stability of aluminum sheet materials and product therefrom
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JPS586939A (en) * 1981-07-06 1983-01-14 Nippon Kokan Kk <Nkk> Heating method for steel strip in continuous heat treatment furnace
JPS6289852A (en) * 1985-09-24 1987-04-24 Kobe Steel Ltd Manufacture of aluminum alloy plate having superior burning hardenability
JPH0538041Y2 (en) * 1987-05-08 1993-09-27

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100584986C (en) * 2004-10-05 2010-01-27 阿勒里斯铝业科布伦茨有限公司 Method of heat treating an aluminium alloy member and apparatus therefor
CN101603161B (en) * 2008-06-10 2012-06-20 通用汽车环球科技运作公司 Sequential aging of aluminum silicon casting alloys

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