JPH04165054A - Method for continuous ageing head treatment of aluminum alloy - Google Patents
Method for continuous ageing head treatment of aluminum alloyInfo
- Publication number
- JPH04165054A JPH04165054A JP8923090A JP8923090A JPH04165054A JP H04165054 A JPH04165054 A JP H04165054A JP 8923090 A JP8923090 A JP 8923090A JP 8923090 A JP8923090 A JP 8923090A JP H04165054 A JPH04165054 A JP H04165054A
- Authority
- JP
- Japan
- Prior art keywords
- treatment
- temp
- temperature
- ageing
- stage
- 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
- 230000032683 aging Effects 0.000 title claims abstract description 35
- 238000011282 treatment Methods 0.000 title claims abstract description 31
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 229910018571 Al—Zn—Mg Inorganic materials 0.000 claims abstract description 3
- 229910018569 Al—Zn—Mg—Cu Inorganic materials 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 15
- 238000005336 cracking Methods 0.000 abstract description 6
- 230000035882 stress Effects 0.000 abstract description 6
- 238000007796 conventional method Methods 0.000 abstract description 2
- 239000002244 precipitate Substances 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910019086 Mg-Cu Inorganic materials 0.000 description 1
- 229910009369 Zn Mg Inorganic materials 0.000 description 1
- 229910007573 Zn-Mg Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
Landscapes
- Conductive Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はアルミニウム合金の熱処理方法に関し、特にＡ
ｊ！ −Ｚｎ−Ｍｇ系及びＡ ｌ −Ｚｎ−Ｍｇ−Ｃｕ
系の所ｉｔ！ｆ７０００系アルミニウム合金の連続時効
熱処理方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for heat treatment of aluminum alloys, and in particular to a method for heat treatment of aluminum alloys.
j! -Zn-Mg system and Al -Zn-Mg-Cu
It's the place for the system! This invention relates to a continuous aging heat treatment method for f7000 series aluminum alloy.
従来、アルミニウム合金は時効熱処理方法は、第２図に
示すように各時効処理が終了する毎に、室温まで冷却（
例えば水冷）していた。Conventionally, the aging heat treatment method for aluminum alloys involves cooling (cooling) to room temperature after each aging treatment, as shown in Figure 2.
For example, water cooling).
従来技術では、各時効処理が終了する毎に室温まで冷却
していたため、実用化を考えた場合、作業工程の増加に
よるコストアップが問題となっていた。In the conventional technology, the material was cooled to room temperature after each aging treatment, and therefore, when considering practical use, an increase in cost due to an increase in the number of work steps became a problem.
そこで、本発明は上記技術水準に鑑み、アルミニウム合
金の３段階の時効処理を一貫して連続的に行い、Ｔ６材
相当の強度とＴ７材相当の耐応力腐食割れ性を得ること
のできるアルミニウム合金の熱処理方法を提供しようと
するものである。Therefore, in view of the above-mentioned technical level, the present invention has been developed to consistently and continuously perform three-stage aging treatment on an aluminum alloy to obtain an aluminum alloy that can obtain strength equivalent to T6 material and stress corrosion cracking resistance equivalent to T7 material. The purpose of this invention is to provide a heat treatment method.
本発明はＡｌ−Ｚｎ−Ｍｇ系及びＡｌ−Ｚｎ−Ｍｇ−Ｃ
ｕ系のアルミニウム合金を溶体化処理した後、５０〜１
６０℃で１〜１００時間第１段時効処理を行い、続いて
連続的に１℃／ｍｉｎ以上の昇温速度で１９０〜２００
℃に昇温し、該温度で３０９〜３時間第２段時効処理を
行い、続いて連続的に１℃／ｍｉｎ以上の降温速度で５
Ｏ−１６０ｔ’に降温して、該温度で１〜１００時間第
３段時効処理を行うことを特徴とするアルミニウム合金
の連続時効熱処理方法である。The present invention is based on Al-Zn-Mg system and Al-Zn-Mg-C
After solution treatment of U-based aluminum alloy, 50-1
A first stage aging treatment is performed at 60°C for 1 to 100 hours, followed by a continuous aging treatment of 190 to 200°C at a temperature increase rate of 1°C/min or more.
The temperature was raised to 1°C, and the second stage aging treatment was performed at this temperature for 3 to 3 hours, followed by continuous aging at a cooling rate of 1°C/min or more for 5
This is a continuous aging heat treatment method for an aluminum alloy, characterized in that the temperature is lowered to O-160t' and a third stage aging treatment is performed at that temperature for 1 to 100 hours.
本発明における各熱処理の作用を以下に説明する。 The effects of each heat treatment in the present invention will be explained below.
溶体化処理により、固溶した溶質原子は第１段時効処理
により析出し、ＧＰゾーンを形成し硬化する。この場合
、処理温度が１６０を以上になることはＧＰゾーンでは
ない中間相が析出することから好ましくない。The solute atoms dissolved in solid solution by the solution treatment are precipitated by the first aging treatment, forming a GP zone and hardening. In this case, it is not preferable for the treatment temperature to exceed 160°C because an intermediate phase other than the GP zone will precipitate.
次に第２段時効処理では、第２段時効処理温度よりも高
温（１９ｏ〜２００ｔ’）に保持することによって、粒
内析出物（ＧＰゾーン）を再固溶させ、粒界には析出物
の核を生成させることを目的としている。この場合、昇
温、及び降温速度が遅すぎると、昇降温中に時効処理が
進行し過ぎてしまい、高温安定相が粒内に析出して好ま
しくなく、昇降温速度は１℃／ｍｉｎ以上が望ましい。Next, in the second stage aging treatment, the intragranular precipitates (GP zone) are re-dissolved by maintaining the temperature at a higher temperature (19o~200t') than the second stage aging treatment temperature, and the precipitates are present at the grain boundaries. The purpose is to generate the nucleus of. In this case, if the rate of temperature increase and decrease is too slow, the aging treatment will progress too much during the temperature increase and decrease, and a high temperature stable phase will precipitate inside the grains, which is undesirable. desirable.
次いで第３段時効処理では、第１段時効処理とほぼ同等
の条件で時効処理することにより、粒内では再固溶した
溶質原子が析出しＧＰゾーンを形成し、粒界では生成し
た核が成長粗大化する。Next, in the third stage aging treatment, the aging treatment is performed under almost the same conditions as the first stage aging treatment, so that the solute atoms re-dissolved in the grains precipitate to form a GP zone, and the generated nuclei at the grain boundaries. Growth and coarsening.
以上のように、粒内にＧＰゾーンを析出させることによ
ってＴ６材相当の強度を、粒界析出物を粗大化させるこ
とによってＴ７材相当の耐応力腐食割れ性を得られる。As described above, by precipitating GP zones within the grains, strength equivalent to T6 material can be obtained, and by coarsening grain boundary precipitates, stress corrosion cracking resistance equivalent to T7 material can be obtained.
供試材合金として、市販の７０７５合金を用いた。その
組成を第１表に示す。供試材合金を通常法で溶体化処理
、水冷後１２１℃で２４時間第１段時効を行い、続いて
２００℃迄４５分で昇温（１゜７６℃／ｍ１ｎ） Ｌ、
２００℃で３０分間第２段時効処理を行い、１２１℃迄
４５分で降温（１，７６℃／ｍ１ｎ） Ｌ、１２１℃で
２４時間第３段時効処理を行った。Commercially available 7075 alloy was used as the test material alloy. Its composition is shown in Table 1. The test material alloy was solution-treated in the usual manner, and after water cooling, the first stage aging was performed at 121°C for 24 hours, and then the temperature was raised to 200°C in 45 minutes (1°76°C/m1n).
The second stage aging treatment was performed at 200°C for 30 minutes, the temperature was lowered to 121°C in 45 minutes (1,76°C/m1n), and the third stage aging treatment was performed at 121°C for 24 hours.
供試材合金の強度と耐応力腐食割れ性を、硬度、電気伝
導度により評価した。結果を第２表に示す。The strength and stress corrosion cracking resistance of the sample alloys were evaluated by hardness and electrical conductivity. The results are shown in Table 2.
第 １ 表
第 ２ 表
上表の結果から分かるように、本発明の規定条件内でＴ
６材相当の硬度とＴ７材相当の電気伝導度が得られたこ
とから、本発明により、Ｔ６材相当の強度とＴ７材相当
の耐応力腐食割れ性を得ることができる。As can be seen from the results in Table 1 and Table 2 above, T
Since the hardness equivalent to the T6 material and the electrical conductivity equivalent to the T7 material were obtained, the present invention makes it possible to obtain the strength equivalent to the T6 material and the stress corrosion cracking resistance equivalent to the T7 material.
Ｃ発明の効果〕
本発明の規定条件内で、３段時効処理を連続的に施すこ
とにより、従来法と同等のＴ６材相当の強度とＴ７材相
当の耐応力腐食割れ性を得ることできる。従って、本発
明を適用することにより、３段階時効処理を実用化する
際の作業効率の向上によるコストダウンが可能となる。C Effects of the Invention] By continuously performing the three-stage aging treatment within the specified conditions of the present invention, it is possible to obtain strength equivalent to T6 material and stress corrosion cracking resistance equivalent to T7 material, which are equivalent to the conventional method. Therefore, by applying the present invention, it is possible to reduce costs by improving work efficiency when putting three-stage aging treatment into practical use.
第１１！Ｉは本発明の熱処理履歴の模式図、第２図は従
来の熱処理履歴を示す模式図である。11th! I is a schematic diagram showing the heat treatment history of the present invention, and FIG. 2 is a schematic diagram showing the conventional heat treatment history.
Claims (1)
ルミニウム合金を溶体化した後、５０〜１６０℃で１〜
１００時間第１段時効処理を行い、続いて連続的に１℃
／ｍｉｎ以上の昇温速度で１９０〜２００℃に昇温し、
該温度で３０分〜３時間第２段時効処理を行い、続いて
連続的に１℃／ｍｉｎ以上の降温速度で５０〜１６０℃
に降温して、該温度で１〜１００時間第３段時効処理を
行うことを特徴とするアルミニウム合金の連続時効熱処
理方法。After solutionizing Al-Zn-Mg-based and Al-Zn-Mg-Cu-based aluminum alloys, the
First stage aging treatment for 100 hours, followed by continuous aging at 1℃
The temperature is raised to 190 to 200 °C at a temperature increase rate of /min or more,
A second stage aging treatment is performed at this temperature for 30 minutes to 3 hours, followed by a continuous aging treatment of 50 to 160°C at a cooling rate of 1°C/min or more.
1. A continuous aging heat treatment method for an aluminum alloy, characterized in that the temperature is lowered to a temperature of 100.degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8923090A JPH04165054A (en) | 1990-04-05 | 1990-04-05 | Method for continuous ageing head treatment of aluminum alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8923090A JPH04165054A (en) | 1990-04-05 | 1990-04-05 | Method for continuous ageing head treatment of aluminum alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04165054A true JPH04165054A (en) | 1992-06-10 |
Family
ID=13964948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8923090A Pending JPH04165054A (en) | 1990-04-05 | 1990-04-05 | Method for continuous ageing head treatment of aluminum alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04165054A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012072435A (en) * | 2010-09-28 | 2012-04-12 | Rinascimetalli:Kk | Metal material and working method therefor |
| CN105734466A (en) * | 2014-12-09 | 2016-07-06 | 北京有色金属研究总院 | Solid solution heat treatment method for improving structure and performance of 7xxx wrought aluminum alloy |
| CN111074123A (en) * | 2020-01-19 | 2020-04-28 | 天津忠旺铝业有限公司 | Production method of 7055 alloy for aviation |
| CN113981343A (en) * | 2021-10-21 | 2022-01-28 | 常熟市恒泰精密金属制品有限公司 | Heat treatment method of aluminum alloy |
-
1990
- 1990-04-05 JP JP8923090A patent/JPH04165054A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012072435A (en) * | 2010-09-28 | 2012-04-12 | Rinascimetalli:Kk | Metal material and working method therefor |
| CN105734466A (en) * | 2014-12-09 | 2016-07-06 | 北京有色金属研究总院 | Solid solution heat treatment method for improving structure and performance of 7xxx wrought aluminum alloy |
| CN105734466B (en) * | 2014-12-09 | 2017-10-27 | 北京有色金属研究总院 | A kind of solid solution heat treatment method of improvement 7xxx systems wrought aluminium alloy microstructure and property |
| CN111074123A (en) * | 2020-01-19 | 2020-04-28 | 天津忠旺铝业有限公司 | Production method of 7055 alloy for aviation |
| CN113981343A (en) * | 2021-10-21 | 2022-01-28 | 常熟市恒泰精密金属制品有限公司 | Heat treatment method of aluminum alloy |
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