WO2005040440A1 - Article extrude en alliage d'aluminium ayant d'excellentes proprietes absorbant les chocs - Google Patents

Article extrude en alliage d'aluminium ayant d'excellentes proprietes absorbant les chocs Download PDF

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Publication number
WO2005040440A1
WO2005040440A1 PCT/JP2003/013588 JP0313588W WO2005040440A1 WO 2005040440 A1 WO2005040440 A1 WO 2005040440A1 JP 0313588 W JP0313588 W JP 0313588W WO 2005040440 A1 WO2005040440 A1 WO 2005040440A1
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WO
WIPO (PCT)
Prior art keywords
component
aluminum alloy
shock absorbing
extruded
range
Prior art date
Application number
PCT/JP2003/013588
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English (en)
Japanese (ja)
Inventor
Shinji Makino
Original Assignee
Aisin Keikinzoku Co., Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Aisin Keikinzoku Co., Ltd. filed Critical Aisin Keikinzoku Co., Ltd.
Priority to PCT/JP2003/013588 priority Critical patent/WO2005040440A1/fr
Priority to US10/882,088 priority patent/US20050087266A1/en
Publication of WO2005040440A1 publication Critical patent/WO2005040440A1/fr

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Classifications

    • 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

Definitions

  • the present invention relates to a shock absorbing member such as a pampering reinforcement beam for an automobile, and more particularly to a shock energy absorbing member at the time of a collision using an extruded aluminum alloy material.
  • the conventionally proposed AI-Zn-Mg-based aluminum alloy has a high tensile y-strength but is inferior in toughness, and not only reduces the amount of impact energy absorbed, but also in the event of a collision (during impact). There was a problem that cracks were easily generated.
  • Japanese Patent Application Laid-Open Publication No. 2002-3227229 proposes an aluminum alloy extruded material having excellent crushing properties.
  • the present inventor has conducted a detailed investigation on the relationship between the power resistance and the energy absorption, and as a result, it has been found that high energy absorption can be stably obtained by controlling the Fe component and the Si component within a predetermined range. Became.
  • the temperature of the profile during extrusion is controlled to be in the range of 500 to 540 ° C, so that it is resistant to stress. It was also found that stress corrosion cracking was improved.
  • the Zn component has a 5.6 to 6.6% by weight (wt%) (hereinafter simply referred to as%).
  • the Mg component is 0.75 to 1.10%
  • the Cu component is 0.10 to 0.25%
  • the Mn component is 0.05 to 0.20%
  • the Cr component is 0.03 to 0.15%
  • Zr component is controlled to be in the range of 0.10 to 0.25%, respectively
  • the Fe component which was conventionally treated as an impurity
  • the Si component which has also been conventionally collected as an impurity
  • the Zn component has a significant effect on the aging characteristics together with the Mg component.Since the atomic radius of Zn is relatively close to the atomic radius of AI, the change in deformation resistance during extrusion is small, so the amount of the Mg component is reduced. In order to control the power resistance within a predetermined range while suppressing it,
  • the yield strength will decrease, and if the Mg component is to be increased to that extent, the formability will decrease, especially for extruded profiles with hollow cross-sections. Speed is slow.
  • the Mg component together with the previously described Zn component, has a significant effect on aging. Therefore, in order to control the heat resistance within a predetermined range, it is preferable to control the Mg component within a range of 0.75 to 1.10%.
  • the Mg component has a larger radius of the element than the atomic radius of AI and greatly affects the deformation resistance during extrusion. If the Mg component exceeds 1.100 / 0 , the extrudability deteriorates. If it is less than 5 o / o, the yield strength will be low if the Zn component is kept in the range of 5.6 to 6.6.
  • the Cu component can improve the stress cracking resistance by relaxing the potential difference between the crystal grain boundary and the inside of the crystal grain of the aluminum alloy.However, if the content is less than 0.10%, the effect is insufficient. %, The general corrosion resistance deteriorates, so the Cu component should be kept within the range of 0.10 to 0.25%.
  • the Zr component has a significant effect on the fibrous structure, and its effect is insufficient at 0.10% or less, and at 0.25 o / o or higher, the molten metal temperature must be increased during billet production. It is necessary to reduce the creativity.
  • the Zr component has an effect of making crystal grains fine.
  • the Cr component was added while the 1 ⁇ 1 ⁇ component was suppressed to 0.20% or less.
  • the Cr component has the effect of refining crystal grains and, together with the Zr component, turning the metal structure into a fibrous structure.
  • the Fe component which is a characteristic component of the present invention, is mixed as an impurity in the manufacturing process of an aluminum alloy pillet.
  • the badness of the toughness of the Fe component changes sharply between 0.17 and Q.40%, and unless it is less than 0.17%, stable mechanical properties and energy absorption cannot be obtained. It is preferably 0.15% or less.
  • the Fe component is 0.10% or less. Ideally it should be kept to
  • the Si component also has a significant effect on the toughness of the extruded aluminum alloy material.To improve the toughness while controlling the heat resistance within a predetermined range, it is necessary to control it within the range of 0.02 to 0.10%. good. More stable mechanical properties and toughness, Ideally, the Si component should be 0.06% or less in order to ensure energy absorption. In this way, the ranges of each component are controlled, and the balance is produced using an aluminum alloy substantially consisting of aluminum.
  • the obtained aluminum alloy billet is subjected to homogenization treatment (homo treatment) at 450 to 500 ° C for 4 hours or more, and an extruded member having a hollow cross-sectional shape is produced by an extrusion press.
  • the aluminum alloy which concerns on this invention is excellent in extrudability, and the thin extruded shape of a hollow cross-sectional shape is obtained.
  • Automotive parts such as bumper reinforcements are often subjected to post-processing such as press bending to match the body shape.
  • the present inventor has clarified that the temperature of the profile immediately after extrusion (in the vicinity of extruded from the extrusion die) has a great effect on the stress corrosion cracking resistance. It has been found that it is better to control the temperature of the material so that it falls within the range of 500 to 540 ° C.
  • the second heat treatment at 130 to 170 ° C. X 3 to 12 hours is performed.
  • This artificial aging treatment is to prevent cracking at the time of collision by making the precipitates finer and more uniformly dispersed to increase the toughness.
  • the treatment is preferably performed at a relatively low temperature for a long time, and the conditions are set so that the 0.2% proof stress falls within the range of 320 to 39 OMPa.
  • the figure shows the results of measuring the amount of energy absorbed until a crack is generated by applying a load to a test piece having a hollow cross-sectional shape of a predetermined size.
  • Fig. 1 shows a composition table of the aluminum alloy used to investigate and confirm the effects of the present invention.
  • Examples 1 to 5 are alloys according to the present invention, and Comparative Examples 1 to 4 are alloys for confirming the effects of components.
  • Examples 1 to 3 alloys were designed for the purpose of confirming the influence of the Fe component and the Si component, so that the other components were the same.
  • Example 4 is an alloy designed for the upper limit of each component, and Example 5 is designed for the lower limit.
  • Comparative Example 1 is an alloy design in which each component exceeded the upper limit of the purpose of the present invention
  • Comparative Example 2 was an alloy design in which components other than Fe and S ⁇ deviated from the lower limits.
  • Comparative Examples 3 and 4 are alloy designs when Fe and Si are more than the aim of the present invention.
  • Fig. 2 shows the results of an investigation of the quality characteristics of extruded shapes that were produced by using such an aluminum alloy to produce 8-inch billets, homogenized for 12 hours at 480 ° C for 12 hours, and extruded with an extrusion press.
  • the shape of the extruded profile is a cross section with an external dimension of about 65 mm X 125 mm, a general thickness of 2 to 4 mm.
  • the EA amount is the amount of energy absorbed when a load is applied.
  • the extruded bar with a cross section with a cross section is cut into a length of 3 OO mm, a load is applied to a flat rigid, and the area of the load stroke diagram is shown. The amount of energy absorbed was measured.
  • SCC is a result of the stress corrosion cracking test, which evaluates the state of crack occurrence after immersing a test piece subjected to a predetermined bending stress in the following test solution.
  • Test liquid 36 g of chromium oxide, 30 g of potassium dichromate, 3 g of sodium chloride, 50 ° C
  • Eye-shaped speed J means the extrusion speed when extruded material with an eye-shaped cross section.
  • ⁇ 6, ⁇ '' can be extruded at a speed of 6 m.
  • XJ means that extrusion was possible at 2 mZ, but productivity was poor.
  • the profile temperature indicates the value obtained by measuring the surface temperature of the profile immediately after extrusion.
  • ET LT temperature means the preheating temperature of the billet.
  • Fig. 3 is a graph showing the results of analyzing the relationship between proof stress and energy absorption based on the measurement results shown in Fig. 2.
  • the graph shown in FIG. 4 shows the result of analyzing the relationship between the resistance value and the amount of energy absorption with respect to the component amounts of Fe and S ⁇ .
  • the plots exhibiting a resistance value of 350 MPa or more correspond to Examples 1, 2, and 3, and the plots of 320 MPa or less are values obtained from Comparative Examples 3 and 4.
  • the present invention can be applied to a member that absorbs collision energy at the time of a collision, such as a bumper reinforcement mounted in front of and behind a vehicle, or an impact beam (side beam) mounted in a vehicle door.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Vibration Dampers (AREA)

Abstract

L'invention porte sur un élément absorbant les chocs qui se caractérise en ce qu'il est préparé selon un procédé consistant à produire un alliage d'aluminium possédant, en % en poids, une composition chimique de : Zn : 5,6 à 6,6 % ; Mg : 0,75 à 1,10 % ; Cu : 0,10 à 0,25 % ; Mn : 0,05 à 0,20 % ; Cr : 0,03 à 0,15 % ; Zr : 0,10 à 0,25 % ; Si : 0,02 à 0,10 % ; Fe : 0,05 à 0,17 %, le reste se composant d'Al et d'inévitables impuretés ; couler l'alliage pour préparer une billette, extruder la billette en un article extrudé de forme transversale creuse, puis à soumettre l'article à un traitement de vieillissement artificiel de sorte que l'article ait une limite d'élasticité de 0,2 % dans une plage comprise entre 320 et 390 Mpa. L'élément absorbant les chocs comprend un article extrudé en alliage d'aluminium qui présente d'excellentes caractéristiques d'absorption de façon à générer une énergie de collision, par exemple, dans une collision entre automobiles.
PCT/JP2003/013588 2003-10-23 2003-10-23 Article extrude en alliage d'aluminium ayant d'excellentes proprietes absorbant les chocs WO2005040440A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2003/013588 WO2005040440A1 (fr) 2003-10-23 2003-10-23 Article extrude en alliage d'aluminium ayant d'excellentes proprietes absorbant les chocs
US10/882,088 US20050087266A1 (en) 2003-10-23 2004-06-30 Impact absorbing material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2003/013588 WO2005040440A1 (fr) 2003-10-23 2003-10-23 Article extrude en alliage d'aluminium ayant d'excellentes proprietes absorbant les chocs

Related Child Applications (1)

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US10/882,088 Continuation US20050087266A1 (en) 2003-10-23 2004-06-30 Impact absorbing material

Publications (1)

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WO2005040440A1 true WO2005040440A1 (fr) 2005-05-06

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8083871B2 (en) 2005-10-28 2011-12-27 Automotive Casting Technology, Inc. High crashworthiness Al-Si-Mg alloy and methods for producing automotive casting
US10301710B2 (en) 2005-01-19 2019-05-28 Otto Fuchs Kg Aluminum alloy that is not sensitive to quenching, as well as method for the production of a semi-finished product
CN112210734A (zh) * 2019-07-11 2021-01-12 株式会社神户制钢所 7000系铝合金制构件的制造方法
CN114941094A (zh) * 2022-03-23 2022-08-26 中亿丰金益(苏州)科技有限公司 一种高强度7系铝合金型材及其加工方法和应用
CN115074586A (zh) * 2022-07-07 2022-09-20 深圳市逸昊金属材料研发有限公司 一种高强韧压铸铝合金及其半固态复合挤压铸造工艺
CN115255811A (zh) * 2022-06-13 2022-11-01 力野精密工业（深圳）有限公司 一种新型高精密车削减震部件工艺

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59113164A (ja) * 1982-12-18 1984-06-29 Aisin Seiki Co Ltd 自動車用バンパ−の製造方法
JPH06306522A (ja) * 1993-04-22 1994-11-01 Furukawa Alum Co Ltd 曲げ加工性に優れたアルミニウム合金押出材とその製造方法
JPH09241785A (ja) * 1996-03-12 1997-09-16 Aisin Keikinzoku Kk 高靭性アルミニウム合金

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59113164A (ja) * 1982-12-18 1984-06-29 Aisin Seiki Co Ltd 自動車用バンパ−の製造方法
JPH06306522A (ja) * 1993-04-22 1994-11-01 Furukawa Alum Co Ltd 曲げ加工性に優れたアルミニウム合金押出材とその製造方法
JPH09241785A (ja) * 1996-03-12 1997-09-16 Aisin Keikinzoku Kk 高靭性アルミニウム合金

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10301710B2 (en) 2005-01-19 2019-05-28 Otto Fuchs Kg Aluminum alloy that is not sensitive to quenching, as well as method for the production of a semi-finished product
US8083871B2 (en) 2005-10-28 2011-12-27 Automotive Casting Technology, Inc. High crashworthiness Al-Si-Mg alloy and methods for producing automotive casting
US9353430B2 (en) 2005-10-28 2016-05-31 Shipston Aluminum Technologies (Michigan), Inc. Lightweight, crash-sensitive automotive component
CN112210734A (zh) * 2019-07-11 2021-01-12 株式会社神户制钢所 7000系铝合金制构件的制造方法
CN114941094A (zh) * 2022-03-23 2022-08-26 中亿丰金益(苏州)科技有限公司 一种高强度7系铝合金型材及其加工方法和应用
CN114941094B (zh) * 2022-03-23 2023-08-29 中亿丰金益(苏州)科技有限公司 一种高强度7系铝合金型材及其加工方法和应用
CN115255811A (zh) * 2022-06-13 2022-11-01 力野精密工业（深圳）有限公司 一种新型高精密车削减震部件工艺
CN115074586A (zh) * 2022-07-07 2022-09-20 深圳市逸昊金属材料研发有限公司 一种高强韧压铸铝合金及其半固态复合挤压铸造工艺
CN115074586B (zh) * 2022-07-07 2024-05-14 深圳市逸昊金属材料研发有限公司 一种高强韧压铸铝合金及其半固态复合挤压铸造工艺

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