EP2141253B1 - Procédé de fabrication d'un extrudat d'alliage d'aluminium 7000 - Google Patents

Procédé de fabrication d'un extrudat d'alliage d'aluminium 7000 Download PDF

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Publication number
EP2141253B1
EP2141253B1 EP08738747.8A EP08738747A EP2141253B1 EP 2141253 B1 EP2141253 B1 EP 2141253B1 EP 08738747 A EP08738747 A EP 08738747A EP 2141253 B1 EP2141253 B1 EP 2141253B1
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Prior art keywords
aluminum alloy
content
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mass
subjecting
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EP08738747.8A
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German (de)
English (en)
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EP2141253A4 (fr
EP2141253A1 (fr
Inventor
Tomoo Yoshida
Arata Yoshida
Shinji Makino
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Aisin Keikinzoku Co Ltd
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Aisin Keikinzoku Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/002—Extruding materials of special alloys so far as the composition of the alloy requires or permits special extruding methods of sequences
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/10—Alloys based on aluminium with zinc as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/053—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with zinc as the next major constituent

Definitions

  • the Mg content is set at 0.95 to 1.95 mass% and set the Zn content at 5.10 to 7.90 mass%.
  • Fe is an unavoidable impurity. Fe is bonded to Al and Si to form an Al-Fe-Si compound, or is bonded to Al to form an Al-Fe compound.
  • the upper limit of the homogenization temperature could be set at 550°C because local melting may occur if the billet is held at a temperature of more than 550°C for a specific period of time.
  • the temperature of the extruded product immediately after extrusion is preferably 580°C or less. If the temperature of the extruded product exceeds 580°C, a pickup occurs on the surface of the extruded product, whereby the appearance may deteriorate.
  • FIGS. 3 , 4A and 4B show cross section examples used for evaluation tests.
  • Molten metal having the composition shown in FIG. 1 (table) was prepared, and was cast into a cylindrical billet with a diameter of 204 mm.
  • the billet was homogenized at 480 to 520°C for about 12 hours or more.
  • Extruded products having a double hollow cross section shown in FIG. 3 and extruded products having a triple hollow cross section shown in FIGS. 4A and 4B were air-cooled using a fan immediately after extrusion, subjected to press quenching, subjected to two-stage artificial aging (90°C ⁇ 4 hours and 140°C ⁇ 14 hours), which does not belong to the present invention, or subjected to artificial aging (90°C ⁇ 4 hours and 140°C ⁇ 14 hours) after natural aging at 40 (i.e., 50°C or less) for one week (seven days) to obtain specimens.
  • FIG. 2 shows the 0.2% proof stress (significant value) and the Vickers hardness HV (significant value) (load: 5 kg) of each specimen.
  • a specimen for measuring the 0.2% proof stress was prepared based on a JIS Z 2201 metal material tensile test specimen, and the 0.2% proof stress was evaluated in accordance with JIS Z 2241 "Metal Material Tensile Test Method".
  • the Vickers hardness HV was evaluated in accordance with JIS Z 2244 "Vickers Hardness Test Method".
  • a value A Zn-5.36 ⁇ Mg of -2.64 ⁇ A ⁇ 0.50 is indicated as “Good”, an increase in 0.2% proof stress of 15 MPa or less is indicated as “Good”, and an increase in hardness HV (load: 5 kg) of 7 or less is indicated as “Good”.
  • the amount of MgZn 2 added was 6.38% in Example 1, 7.95% in Example 2, and 8.90% in Example 3.
  • the proof stress increased along with an increase in the amount of MgZn 2 added.
  • the difference due to natural aging at 40°C for one week was evaluated by the proof stress value and the hardness. Since it was confirmed that the positive effect due to natural aging is suppressed, it is considered that the toughness is stabilized due to artificial aging so that the impact resistance increases.
  • the aluminum alloy extruded products according the examples of the invention can suppress the positive effect due to artificial aging after extrusion, the artificial aging effect after secondary processing is stabilized even if the extruded product is allowed to stand at room temperature for a long period of time. Therefore, the aluminum alloy extruded products can be widely used as 7000-series aluminum alloy extruded products utilized in the field in which the required quality is strictly limited to a narrow range, such as automotive bumper reinforcement members.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Extrusion Of Metal (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Claims (1)

  1. Procédé pour produire un produit extrudé en alliage aluminium, le procédé comprenant :
    - l'homogénéisation d'une bille ayant été moulée en utilisant un alliage aluminium de la série 7 000 à une température comprise entre 480 et 520°C pendant 12 heures ou plus,
    - le préchauffage du produit homogénéisé à une température comprise entre 480 bis 540°C,
    - l'extrusion du produit préchauffé en utilisant une matrice d'extrusion ayant une température comprise entre 440 et 500°C,
    - la trempe sous presse du produit extrudé à un taux de refroidissement de 29°C/min ou plus, et
    - la soumission du produit obtenu à un vieillissement artificiel à une température de 90°C pendant 4 heures et à une température de 140°C pendant 14 heures suite à la soumission du produit à un vieillissement naturel à une température de 50°C ou moins,
    l'alliage aluminium de la série 7 000
    - comprenant une teneur en Mg comprise entre 0,95 et 1,95 masse% et une teneur en Zn comprise entre 5,10 et 7,90 masse%,
    - comprenant une teneur en Mg excédante ou une teneur en Zn excédante, au regard d'une composition stoïchiométrique montrée par MgZn2, de moins de 0,5 masse%,
    - ayant une valeur A indiquée par une expression relationnelle A = Zn - 5,36 Mg (masse%) de -2,64 à 0,50, et
    - une augmentation de la limite d'élasticité en raison du vieillissement naturel de 15 MPa ou moins et une augmentation de la dureté HV en raison du vieillissement naturel de 7 ou moins, lorsque l'on compare
    - la limite d'élasticité et la dureté du produit extrudé en alliage aluminium obtenu en soumettant l'alliage aluminium à un vieillissement naturel de 40°C ou moins pendant 7 jours après extrusion et en soumettant ensuite le produit obtenu à un vieillissement artificiel à une température de 90°C pendant 4 heures et à une température de 140°C pendant 14 heures
    avec
    - la limite d'élasticité et la dureté du produit extrudé en alliage aluminium obtenu en soumettant l'alliage aluminium à un vieillissement artificiel à une température de 90°C pendant 4 heures et à une température de 140°C pendant 14 heures immédiatement après l'extrusion.
EP08738747.8A 2007-03-26 2008-03-24 Procédé de fabrication d'un extrudat d'alliage d'aluminium 7000 Active EP2141253B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007080296 2007-03-26
PCT/JP2008/055408 WO2008123184A1 (fr) 2007-03-26 2008-03-24 Extrudat d'alliage d'aluminium 7000 et son procédé de fabrication

Publications (3)

Publication Number Publication Date
EP2141253A1 EP2141253A1 (fr) 2010-01-06
EP2141253A4 EP2141253A4 (fr) 2014-03-12
EP2141253B1 true EP2141253B1 (fr) 2015-09-16

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EP08738747.8A Active EP2141253B1 (fr) 2007-03-26 2008-03-24 Procédé de fabrication d'un extrudat d'alliage d'aluminium 7000

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US (2) US20090053098A1 (fr)
EP (1) EP2141253B1 (fr)
JP (1) JP5588170B2 (fr)
WO (1) WO2008123184A1 (fr)

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JP5204793B2 (ja) * 2010-01-12 2013-06-05 株式会社神戸製鋼所 耐応力腐食割れ性に優れた高強度アルミニウム合金押出材
JP2012207302A (ja) * 2011-03-16 2012-10-25 Kobe Steel Ltd 熱処理型Ａｌ−Ｚｎ−Ｍｇ系アルミニウム合金押出材の製造方法
JP5842295B2 (ja) * 2011-05-30 2016-01-13 アップル インコーポレイテッド 筐体用７０００系アルミニウム合金押出材
JP5834077B2 (ja) * 2011-06-02 2015-12-16 アイシン軽金属株式会社 アルミニウム合金及びそれを用いた押出形材の製造方法
US10697047B2 (en) 2011-12-12 2020-06-30 Kobe Steel, Ltd. High strength aluminum alloy extruded material excellent in stress corrosion cracking resistance
CN102732761B (zh) * 2012-06-18 2014-01-08 中国航空工业集团公司北京航空材料研究院 一种7000系铝合金材料及其制备方法
JP6096488B2 (ja) * 2012-11-30 2017-03-15 アイシン軽金属株式会社 ７０００系アルミニウム合金の押出成形用ビレット及び押出形材の製造方法
JP5631379B2 (ja) * 2012-12-27 2014-11-26 株式会社神戸製鋼所 耐応力腐食割れ性に優れたバンパーレインフォース用高強度アルミニウム合金押出材
EP3052668B1 (fr) * 2013-09-30 2020-07-01 Apple Inc. Alliages d'aluminium à haute résistance et ayant un côté esthétique
JP6298640B2 (ja) * 2014-01-21 2018-03-20 株式会社Ｕａｃｊ押出加工 二輪車及び三輪車用アンダーブラケット並びにその製造方法
JP6244209B2 (ja) * 2014-01-21 2017-12-06 株式会社Ｕａｃｊ押出加工 二輪車及び三輪車用アンダーブラケット並びにその製造方法
JP6406971B2 (ja) * 2014-10-17 2018-10-17 三菱重工業株式会社 アルミニウム合金部材の製造方法
CN104762538B (zh) 2015-04-09 2017-01-25 广东欧珀移动通信有限公司 铝合金及其阳极氧化方法
CN108884525B (zh) 2016-03-30 2020-07-10 爱信轻金属株式会社 耐腐蚀性优异且具有良好的淬火性能的高强度铝合金挤出材料及其制造方法
KR20180046764A (ko) * 2016-10-28 2018-05-09 금오공과대학교 산학협력단 핫스탬핑 알루미늄 케이스의 제조방법 및 그 방법에 의해 제조된 핫스탬핑 알루미늄 케이스
JP7093611B2 (ja) * 2016-11-30 2022-06-30 アイシン軽金属株式会社 押出材用アルミニウム合金及びそれを用いた押出材並びに押出材の製造方法
JP7051569B2 (ja) * 2018-05-08 2022-04-11 株式会社神戸製鋼所 自動車のバンパー補強材
US11345980B2 (en) 2018-08-09 2022-05-31 Apple Inc. Recycled aluminum alloys from manufacturing scrap with cosmetic appeal
JP6672503B1 (ja) * 2019-03-28 2020-03-25 株式会社神戸製鋼所 アルミニウム合金押出材からなる自動車のドアビーム
CN109988952B (zh) * 2019-05-10 2020-05-05 贵州正合可来金科技有限责任公司 一种铝合金手机外壳的制备方法
CN110284085B (zh) * 2019-08-07 2021-06-25 东北大学 一种同时提高7xxx铝合金强度和延伸率的方法
JP2020164980A (ja) * 2020-01-22 2020-10-08 株式会社神戸製鋼所 アルミニウム合金押出材からなる自動車のドアビーム

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Also Published As

Publication number Publication date
EP2141253A4 (fr) 2014-03-12
JP5588170B2 (ja) 2014-09-10
EP2141253A1 (fr) 2010-01-06
US20110017366A1 (en) 2011-01-27
US20090053098A1 (en) 2009-02-26
WO2008123184A1 (fr) 2008-10-16
JPWO2008123184A1 (ja) 2010-07-15

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