JP3334241B2 - Heat treatment method for extruded Al-Mg-Si aluminum alloy - Google Patents
Heat treatment method for extruded Al-Mg-Si aluminum alloyInfo
- Publication number
- JP3334241B2 JP3334241B2 JP09854293A JP9854293A JP3334241B2 JP 3334241 B2 JP3334241 B2 JP 3334241B2 JP 09854293 A JP09854293 A JP 09854293A JP 9854293 A JP9854293 A JP 9854293A JP 3334241 B2 JP3334241 B2 JP 3334241B2
- Authority
- JP
- Japan
- Prior art keywords
- aluminum alloy
- extruded
- heat treatment
- extrusion
- aging treatment
- 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 - Fee Related
Links
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- Extrusion Of Metal (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、Ａｌ−Ｍｇ−Ｓｉ系ア
ルミニウム合金押出材の熱処理法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for heat-treating an extruded material of an Al-Mg-Si aluminum alloy.
【０００２】[0002]
【従来の技術】Ａｌ−Ｍｇ−Ｓｉ系アルミニウム合金は
熱処理型の合金で、熱処理によって特性をいろいろと制
御することが可能であり、このことを利用してその押出
材は、家電、建築用材、自動車の部材、航空機の部材等
に広く用いられている。このＡｌ−Ｍｇ−Ｓｉ系アルミ
ニウム合金押出材は、押出の際の高温加工から急冷して
焼入れした後、人工時効処理を施したＴ５状態で使用さ
れることが多い。押出後、更に曲げ加工等の成形加工を
施す場合は、溶体化処理後、常温時効させたＴ４状態
か、または前記Ｔ５状態で加工するが、加工度の厳しい
場合には、Ｔ４状態で加工するのが一般的であり、この
場合は加工後人工時効処理を施して高い強度を得てい
る。いずれの場合にも使用できる状態になるのには、焼
入れ後人工時効処理を施すまでに、数日から数カ月に及
んで常温に保持する常温時効処理の期間が必要である。2. Description of the Related Art Al-Mg-Si-based aluminum alloys are heat-treatable alloys whose properties can be controlled in various ways by heat treatment. Widely used for automobile parts, aircraft parts, and the like. This extruded Al-Mg-Si-based aluminum alloy is often used in a T5 state where it is subjected to artificial aging after quenching and quenching from high-temperature processing during extrusion. In the case where further forming such as bending is performed after extrusion, processing is performed in the T4 state aged at room temperature after the solution treatment or in the T5 state, but when the degree of processing is severe, processing is performed in the T4 state. Generally, in this case, after processing, artificial aging treatment is performed to obtain high strength. In order to be able to be used in any case, it is necessary to have a normal temperature aging period of maintaining the room temperature for several days to several months before performing the artificial aging treatment after quenching.
【０００３】この常温時効処理は約１wt％以上のＭｇ2
Ｓｉを含むＡｌ−Ｍｇ−Ｓｉ系アルミニウム合金に対し
て人工時効処理に負の効果があり、その後の人工時効処
理によって得られる強度が低下するという問題がある。
また、常温時効処理によってもある程度の時効硬化を生
じ、時間が経過するにつれＴ４状態での成形加工の際の
成形性が低下するという問題もある。[0003] This room temperature aging treatment is carried out by adding Mg 2 of about 1 wt% or more.
The artificial aging treatment has a negative effect on the Al-Mg-Si-based aluminum alloy containing Si, and there is a problem that the strength obtained by the subsequent artificial aging treatment is reduced.
There is also a problem that a certain amount of age hardening occurs even by the normal temperature aging treatment, and the moldability in the molding process in the T4 state is reduced as time passes.
【０００４】Ａｌ−Ｍｇ−Ｓｉ系アルミニウム合金にお
ける時効析出過程は、過飽和固溶体→クラスタ→針状
Ｇ．Ｐ．ゾーン→棒状中間相β´→板状安定相βの過程
であり、最高強度は針状Ｇ．Ｐ．ゾーンにより得られ
る。常温時効処理後の人工時効処理により強度が得られ
ない理由は、溶体化処理後の常温時効処理中にクラスタ
が生じ、この多くは人工時効処理によっても針状Ｇ．
Ｐ．ゾーンへ移行できないためといわれている。[0004] The aging precipitation process in an Al-Mg-Si-based aluminum alloy is performed by supersaturated solid solution → cluster → needle-like G. P. Zone → rod-like intermediate phase β '→ plate-like stable phase β, and the highest strength is acicular G. P. Obtained by zones. The reason why the artificial aging treatment after the room temperature aging treatment does not provide strength is that clusters are formed during the normal temperature aging treatment after the solution treatment, and most of the clusters are formed by the artificial aging treatment.
P. It is said that they cannot move to the zone.
【０００５】そこで予備時効処理により、常温時効処理
中に生じたクラスタを針状Ｇ．Ｐ．ゾーンに移行させた
後に、人工時効処理を行い、強度を向上させる方法があ
る。しかしこの熱処理法でも全てのクラスタが針状Ｇ．
Ｐ．ゾーンに移行するわけではなく、強度は十分には向
上させることができない。[0005] Therefore, by the preliminary aging treatment, clusters generated during the normal temperature aging treatment are replaced with needle-like G. P. After shifting to the zone, there is a method of performing an artificial aging treatment to improve the strength. However, even in this heat treatment method, all the clusters have needle-like G.P.
P. It does not move to the zone, and the strength cannot be improved sufficiently.
【０００６】また溶体化処理直後に高温（約１００〜１
８０℃）で予備時効処理を行い、針状Ｇ．Ｐ．ゾーンを
析出させ、この後の常温時効処理時にクラスタが生じる
ことを防ぐという熱処理法もある。しかしこの熱処理法
では、焼入後に２回の熱処理をおこなわなければなら
ず、コスト面に問題があり、さらに焼入後数時間以内に
高温で予備時効処理を行わなければならないため、押出
時間に合わせて熱処理炉を予め準備しておかねばならな
いという生産工程上の問題もある。Immediately after the solution treatment, a high temperature (about 100 to 1)
80.degree. C.) to obtain a needle-shaped P. There is also a heat treatment method in which a zone is deposited to prevent the formation of clusters during the subsequent normal temperature aging treatment. However, in this heat treatment method, two heat treatments must be performed after quenching, which is problematic in terms of cost, and furthermore, pre-aging treatment must be performed at a high temperature within several hours after quenching. There is also a problem in the production process that a heat treatment furnace must be prepared in advance.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、このような
状況に鑑み、人工時効処理後に十分な強度を有し、かつ
成形性にも優れたＡｌ−Ｍｇ−Ｓｉ系アルミニウム合金
押出材を得ることができるＡｌ−Ｍｇ−Ｓｉ系アルミニ
ウム合金押出材の熱処理法を開発することを目的として
成されたものである。SUMMARY OF THE INVENTION In view of such circumstances, the present invention provides an Al-Mg-Si-based aluminum alloy extruded material having sufficient strength after artificial aging treatment and excellent in formability. The purpose of the present invention is to develop a heat treatment method for an extruded Al-Mg-Si-based aluminum alloy that can be used.
【０００８】[0008]
【課題を解決するための手段】即ち本発明は、Ａｌ−Ｍ
ｇ−Ｓｉ系アルミニウム合金押出材をプレス焼入れ直後
に誘導加熱により２５０〜２８０℃で、５〜１５秒加熱
することを特徴とするＡｌ−Ｍｇ−Ｓｉ系アルミニウム
合金押出材の熱処理法である。That is, the present invention provides an Al-M
Immediately after press quenching, the g-Si based aluminum alloy extruded material is heated at 250 to 280 ° C. for 5 to 15 seconds by induction heating.
This is a heat treatment method for an extruded Al-Mg-Si-based aluminum alloy material.
【０００９】[0009]
【作用】本発明はＡｌ−Ｍｇ−Ｓｉ系アルミニウム合金
押出材を対象とするものであり、溶体化・焼入れ処理
を、押出加工後直ちに焼入れ処理を行ういわゆるプレス
焼入れによって行うことができる。押出温度は通常合金
の溶体化処理温度よりも低いが、加工中の発熱によりダ
イス近くで温度は上昇し、溶質原子が押出加工時に固溶
化することができるのである。The present invention is directed to an Al-Mg-Si based aluminum alloy extruded material, and the solution-hardening treatment can be performed by so-called press quenching in which quenching is performed immediately after extrusion. Although the extrusion temperature is usually lower than the solution heat treatment temperature of the alloy, the temperature rises near the die due to the heat generated during processing, so that the solute atoms can form a solid solution during the extrusion processing.
【００１０】本発明において、上記プレス焼入れ直後に
高温短時間加熱するのは、高温短時間加熱することによ
り針状Ｇ．Ｐ．ゾーンを析出させ、常温時効処理中にク
ラスタを生じることを防止するためである。加熱温度は
２５０℃〜２８０℃とし、加熱時間は５秒〜１５秒とす
る。その理由は２５０℃未満、または５秒未満では針状
Ｇ．Ｐ．ゾーンが析出せず、２８０℃を超え、または１
５秒を超えると板状安定相が析出して強度が低下するか
らである。In the present invention, heating at a high temperature for a short time immediately after the above-mentioned press quenching is performed by heating at a high temperature for a short time. P. This is for preventing the formation of a zone and the formation of clusters during the normal-temperature aging treatment. The heating temperature is
And 250 ° C. to 280 ° C., the heating time to 5 seconds to 15 seconds
You . The reason is that when the temperature is less than 250 ° C. or less than 5 seconds, the needle G. P. No zone was deposited and exceeded 280 ° C or 1
If the time exceeds 5 seconds , a plate-like stable phase is precipitated and the strength is reduced.
【００１１】この高温短時間の加熱を行うには、誘導加
熱によるのが簡便で好適である。In order to perform the heating at a high temperature for a short time, induction heating is convenient and preferable.
【００１２】本発明が適用できるＡｌ−Ｍｇ−Ｓｉ系ア
ルミニウム合金としては、ＪＩＳ６０６３合金、ＪＩＳ
６Ｎ０１合金、ＪＩＳ６０６１合金等の６０００系の合
金の殆どが挙げられる。As the Al-Mg-Si based aluminum alloy to which the present invention can be applied, JIS6063 alloy, JIS
Almost all 6000 series alloys such as 6N01 alloy and JIS6061 alloy are exemplified.
【００１３】本発明熱処理法を施す前の工程であるＡｌ
−Ｍｇ−Ｓｉ系アルミニウム合金の溶解、鋳造、均質化
処理、押出前予備加熱、押出加工は通常通り行えば良
い。In the step before the heat treatment of the present invention, Al
-Dissolution, casting, homogenization, preheating before extrusion, and extrusion of the Mg-Si-based aluminum alloy may be performed as usual.
【００１４】[0014]
【実施例】次に本発明を実施例により更に詳細に説明す
る。表１に示す合金組成を有するＪＩＳ６０６３合金、
ＪＩＳ６Ｎ０１合金、ＪＩＳ６０６１合金をそれぞれ水
冷鋳造にて外径２００ｍｍの鋳塊とし、５４０℃×８時
間の均質化処理後、押出温度５００℃、押出速度１０ｍ
／ｍｉｎで、熱間押出を行った。押出設備は図１に示す
ような水スプレーの後に誘導加熱炉を設置したものとし
た。押出形状は３×１２０ｍｍの板状である。押出後の
冷却は水スプレーで室温まで急冷した。その直後に誘導
加熱炉で表２に示す加熱を行った。その後３０日間室温
で常温時効処理した後、１７５℃×８時間の人工時効処
理を行った後、ＪＩＳ５号引張試験片に加工し、引張試
験を行った。その結果を表２に示す。この結果はＮ＝３
の平均値である。Next, the present invention will be described in more detail by way of examples. JIS6063 alloy having an alloy composition shown in Table 1,
Each of JIS6N01 alloy and JIS6061 alloy was cast into a slab having an outer diameter of 200 mm by water-cooling casting, and after homogenization treatment at 540 ° C. × 8 hours, the extrusion temperature was 500 ° C. and the extrusion speed was 10 m.
/ Min, hot extrusion was performed. The extrusion equipment was one in which an induction heating furnace was installed after water spraying as shown in FIG. The extruded shape is a 3 × 120 mm plate shape. Cooling after extrusion was rapidly cooled to room temperature by water spray. Immediately thereafter, heating shown in Table 2 was performed in an induction heating furnace. After aging treatment at room temperature for 30 days at room temperature, an artificial aging treatment was performed at 175 ° C. for 8 hours, then processed into a JIS No. 5 tensile test piece, and a tensile test was performed. Table 2 shows the results. This result is N = 3
Is the average value.
【００１５】[0015]
【表１】 [Table 1]
【００１６】[0016]
【表２】 [Table 2]
【００１７】表２から明らかなように、本発明法による
ものは、従来法によるものと比較して引張強さ及び耐力
ともに向上し、伸びも低下していない。As is clear from Table 2, in the case of the method of the present invention, both the tensile strength and the proof stress are improved and the elongation is not reduced as compared with the method of the conventional method.
【００１８】[0018]
【発明の効果】以上述べたように、本発明によれば合金
組成を変更することなく、Ａｌ−Ｍｇ−Ｓｉ系アルミニ
ウム合金の強度を向上させ、かつ成形性を維持すること
ができるもので、工業上顕著な効果を奏するものであ
る。As described above, according to the present invention, it is possible to improve the strength of an Al-Mg-Si based aluminum alloy and maintain the formability without changing the alloy composition. It has a remarkable industrial effect.
【図１】本発明に用いる押出設備の一例を示す概略図。FIG. 1 is a schematic diagram showing an example of an extrusion equipment used in the present invention.
１ 押出プレス ２ 水スプレー ３ 誘導加熱炉 ４ 押出材 Reference Signs List 1 extrusion press 2 water spray 3 induction heating furnace 4 extrusion material
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) C22F 1/04 - 1/057 B21C 23/00 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) C22F 1/04-1/057 B21C 23/00
Claims (1)
出材をプレス焼入れ直後に誘導加熱により２５０〜２８
０℃で、５〜１５秒加熱することを特徴とするＡｌ−Ｍ
ｇ−Ｓｉ系アルミニウム合金押出材の熱処理法。An extruded material of an Al-Mg-Si based aluminum alloy is heated to 250 to 28 by induction heating immediately after press hardening.
Al-M characterized by heating at 0 ° C. for 5 to 15 seconds
A heat treatment method for extruded g-Si aluminum alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09854293A JP3334241B2 (en) | 1993-03-31 | 1993-03-31 | Heat treatment method for extruded Al-Mg-Si aluminum alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09854293A JP3334241B2 (en) | 1993-03-31 | 1993-03-31 | Heat treatment method for extruded Al-Mg-Si aluminum alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06287725A JPH06287725A (en) | 1994-10-11 |
| JP3334241B2 true JP3334241B2 (en) | 2002-10-15 |
Family
ID=14222579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09854293A Expired - Fee Related JP3334241B2 (en) | 1993-03-31 | 1993-03-31 | Heat treatment method for extruded Al-Mg-Si aluminum alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3334241B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AUPO084796A0 (en) * | 1996-07-04 | 1996-07-25 | Comalco Aluminium Limited | 6xxx series aluminium alloy |
| KR102055051B1 (en) * | 2015-05-08 | 2019-12-11 | 노벨리스 인크. | Impact Heat Treatment of Aluminum Alloy Articles |
-
1993
- 1993-03-31 JP JP09854293A patent/JP3334241B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06287725A (en) | 1994-10-11 |
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