EP0863220B1 - Connecting element - Google Patents

Connecting element Download PDF

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Publication number
EP0863220B1
EP0863220B1 EP97810129A EP97810129A EP0863220B1 EP 0863220 B1 EP0863220 B1 EP 0863220B1 EP 97810129 A EP97810129 A EP 97810129A EP 97810129 A EP97810129 A EP 97810129A EP 0863220 B1 EP0863220 B1 EP 0863220B1
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EP
European Patent Office
Prior art keywords
max
weight
connecting element
element according
alloy contains
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EP97810129A
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German (de)
French (fr)
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EP0863220A1 (en
EP0863220B2 (en
Inventor
Pius Schwellinger
Dietmar Schröder
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3A Composites International AG
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Alusuisse Lonza Services Ltd
Alusuisse Technology and Management Ltd
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Priority to EP97810129A priority Critical patent/EP0863220B2/en
Priority to ES97810129T priority patent/ES2150208T5/en
Priority to DE59702201T priority patent/DE59702201D1/en
Priority to PT97810129T priority patent/PT863220E/en
Application filed by Alusuisse Lonza Services Ltd, Alusuisse Technology and Management Ltd filed Critical Alusuisse Lonza Services Ltd
Priority to AT97810129T priority patent/ATE195557T1/en
Priority to DK97810129T priority patent/DK0863220T3/en
Publication of EP0863220A1 publication Critical patent/EP0863220A1/en
Publication of EP0863220B1 publication Critical patent/EP0863220B1/en
Priority to GR20000402548T priority patent/GR3034859T3/en
Publication of EP0863220B2 publication Critical patent/EP0863220B2/en
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    • 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
    • C22C21/06—Alloys based on aluminium with magnesium 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
    • C22F1/04—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 invention relates to a connecting element from a Aluminum alloy of the type AlZnMgCu, with a shaft for Connection of components made of aluminum, magnesium or their Alloys, especially a screw or rivet.
  • a self-punching fastening device for Production of a riveted joint using semi-hollow rivets is known for example from WO-A-95/09307.
  • the invention is therefore based on the object of an alloy to provide with the connecting elements of the type with high strength simple and Have it manufactured economically.
  • the alloy is made of 6.0 to 8.0 % By weight zinc 2.0 to 3.5 % By weight magnesium 1.6 to 1.9 % Copper 0.05 to 0.30 % By weight zirconium Max. 0.30 Wt% chromium Max. 0.50 Wt% manganese Max. 0.10 % By weight titanium Max. 0.20 % By weight silicon Max. 0.20 Wt% iron others individually max. 0.05% by weight, max. 0.15 wt .-%, and the balance is aluminum and unavoidable impurities.
  • the material used according to the invention is opposite comparable high-strength materials of the group AA7xxx easier to cast and lighter by pressing and rolling to be processed warm.
  • the corrosion resistance is also much better than comparable alloys According to the state of the art.
  • Suitable raw material for the production of screws and rivets are extruded rods, being used as a material for Punch rivets, for example, the use of sheet metal is also conceivable is.
  • the alloy In the production of fasteners using bar stock the alloy first becomes a press bolt shed and the bolt after a homogenization annealing pressed into a rod-shaped primary material. After one Solution annealing and quenching of the primary material becomes this usually by cold forming to the connecting elements processed, which then to achieve the desired Strength with sufficient stretch of a thermoset be subjected.
  • a particularly preferred Manufacturing variant that has a higher degree of cold forming with correspondingly increased strength and also allows leads to better corrosion resistance, is before Cold forming of the raw material into a screw or rivet recovery annealing at a temperature of about 180 up to 260 ° C for a period of about 5 seconds to 120 minutes carried out. A short treatment time applies to a high heat treatment temperature.
  • the finished heat-treated screws or rivets can each anodized, coated, painted or according to application further protected against corrosion in another way become.
  • To improve the releasability of the connection Screws for example, also with a Teflon or Ormocere layer to be sealed. In certain cases also a seal and adhesive according to the known Sped-cap procedure advantageous.
  • each alloy there was a flat profile 10 x 50 mm and one Round bar 40 mm diameter pressed indirectly.
  • the stud temperature was about 230 to 260 ° C
  • the recipient temperature was around 300 ° C.
  • the pressing speed was about 2 to 2.8 m / min.
  • Solution annealing was carried out at a temperature of 470 ⁇ 3 ° C over a period of 0.5 h.
  • Table 2 shows the data of all alloys obtained on the 10 x 50 mm flat profile.
  • the heat treatment was carried out in each case as follows: Solution annealing 470 ° C / 0.5 h Stretchers ⁇ 1% Interim storage ⁇ 1 day Harden Condition T 651: 130 ° C / 14h Condition T 7351: 105 ° C / 5h + 175 ° C / 7h

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Insertion Pins And Rivets (AREA)
  • Heat Treatment Of Articles (AREA)
  • Surgical Instruments (AREA)
  • Massaging Devices (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Joints With Pressure Members (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Wire Bonding (AREA)

Abstract

A fastener (especially a screw or rivet), for fastening components of aluminium, magnesium and their alloys, consists of an AlZnMgCu type aluminium alloy of composition (by wt.) 6.0-8.0% Zn, 2.0-3.5% Mg, 1.0-3.0% Cu, 0.05-0.30% Zr, NOTGREATER 0.30% Cr, NOTGREATER 0.50% Mn, NOTGREATER 0.10% Ti, NOTGREATER 0.20% Si, NOTGREATER 0.20% Fe, NOTGREATER 0.05% each ( NOTGREATER 0.15% total) of other elements, balance Al and impurities. Also claimed is a process for producing the above fastener by casting to a billet, homogenisation annealing, compressing to a starting material, solution annealing, quenching, cold forming to fasteners and thermally hardening, in which recovery annealing is carried out at 180-260 degrees C for 5 secs. to 120 mins. prior to cold forming.

Description

Die Erfindung betrifft ein Verbindungselement aus einer Aluminiumlegierung vom Typ AlZnMgCu, mit einem Schaft zur Verbindung von Bauteilen aus Aluminium, Magnesium oder deren Legierungen, insbesondere eine Schraube oder ein Niet.The invention relates to a connecting element from a Aluminum alloy of the type AlZnMgCu, with a shaft for Connection of components made of aluminum, magnesium or their Alloys, especially a screw or rivet.

Bei der Verbindung von Bauteilen werden häufig Schrauben und Stanznieten in der Form von Voll- oder Halbhohlnieten eingesetzt. Eine selbststanzende Befestigungsvorrichtung zur Herstellung einer Nietverbindung unter Verwendung von Halbhohlnieten ist beispielsweise aus der WO-A-95/09307 bekannt.When connecting components, screws and Punch rivets used in the form of full or semi-hollow rivets. A self-punching fastening device for Production of a riveted joint using semi-hollow rivets is known for example from WO-A-95/09307.

Ein wichtiges Einsatzgebiet derartiger Verbindungselemente ist der Fahrzeugbau. Mit zunehmenden Einsatz von Aluminium- und Magnesiumwerkstoffen in diesem Bereich gewinnt auch der Einsatz von Schrauben und Stanznieten aus Aluminiumwerkstoffen an Bedeutung. Bisher wurden überwiegend Stahlschrauben und Stahlstanznieten verwendet, die aus Gründen der galvanischen Korrosion und der Spaltkorrosion aus Edelstahl gefertigt werden mussten. Die Unterschiede zwischen Aluminium und Stahl bezüglich der physikalischen Eigenschaften wie Wärmeausdehnungskoeffizient, Elastizitätsmodul u.a. können, insbesondere bei einem Temperaturwechsel, zu zusätzlichen Spannungen oder zu einer Lockerung der Verbindung führen. Der Einsatz eines Werkstoffs mit ähnlichen chemischen, elektrochemischen und physikalischen Eigenschaften für die Verbindungselemente wäre daher von grossem Nutzen.An important area of application for such fasteners is vehicle construction. With increasing use of aluminum and magnesium materials in this area also wins Use of screws and punch rivets made of aluminum materials in importance. So far, mainly steel screws and steel punch rivets used for reasons galvanic corrosion and crevice corrosion made of stainless steel had to be manufactured. The differences between Aluminum and steel in terms of physical properties such as coefficient of thermal expansion, modulus of elasticity i.a. can, especially with a temperature change, to additional tension or loosening of the connection to lead. The use of a material with similar chemical, electrochemical and physical properties would therefore be of great importance for the connecting elements Use.

Die Herstellung von Schrauben und Stanznieten aus Aluminiumwerkstoffen ist technisch möglich. In beschränktem Umfang werden beispielsweise Schrauben aus dem bekannten Werkstoff AA7075 gefertigt, wobei eine Zugfestigkeit von etwa 500 bis 600 MPa erreicht wird. Eine Erweiterung der Einsatzmöglichkeiten wäre nur dann möglich, wenn die genannten Verbindungselemente aus Werkstoffen mit höherer Festigkeit wirtschaftlich gefertigt werden könnten. Bekannte Werkstoffe mit höherer Festigkeit sind die Legierungen AA7049, 7049A, 7149, 7249, 7349, 7449 und 7055, deren Herstellung jedoch nicht einfach ist. In der WO-A-96/34993 ist zudem zur Herstellung von Nieten die Legierung AA7050 in der Zusammensetzung 6.2% Zn, 2.2% Mg, 2.3% Cu und 0.12% Zr genannt. Wegen ihrer Neigung zu Rissen bei der Erstarrung sind diese Werkstoffe nicht einfach zu giessen und die Herstellung grosser Barren und Bolzen als Ausgangsmaterial zum Walzen oder Pressen gestaltet sich sehr aufwendig und ist damit unwirtschaftlich. Hinzu kommt, dass diese Werkstoffe in allen Wärmebehandlungszuständen empfindlich auf Spannungsrisskorrosion und Schichtkorrosion sind.The production of screws and punch rivets from aluminum materials is technically possible. To a limited extent are, for example, screws made of the known material AA7075 manufactured, with a tensile strength of about 500 to 600 MPa is reached. An expansion of the possible uses would only be possible if the connecting elements mentioned economical from materials with higher strength could be manufactured. Known materials the alloys AA7049, 7049A, 7149, 7249, 7349, 7449 and 7055, but their manufacture is not easy. In WO-A-96/34993 the alloy AA7050 is also used for the production of rivets called 6.2% Zn, 2.2% Mg, 2.3% Cu and 0.12% Zr. Because of their tendency to crack upon solidification are these materials not easy to cast and the production of large bars and bolts as raw material for rolling or pressing is very complex and is therefore uneconomical. Add to that this Materials sensitive in all heat treatment conditions for stress corrosion cracking and layer corrosion.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Legierung bereitzustellen, mit der sich Verbindungselemente der eingangs genannten Art mit hoher Festigkeit einfach und wirtschaftlich herstellen lassen.The invention is therefore based on the object of an alloy to provide with the connecting elements of the type with high strength simple and Have it manufactured economically.

Zur erfindungsgemässen Lösung der Aufgabe führt, dass die Legierung aus 6,0 bis 8,0 Gew.-% Zink 2,0 bis 3,5 Gew.-% Magnesium 1,6 bis 1,9 Gew.-% Kupfer 0,05 bis 0,30 Gew.% Zirkonium max. 0,30 Gew.-% Chrom max. 0,50 Gew.-% Mangan max. 0,10 Gew.-% Titan max. 0,20 Gew.-% Silizium max. 0,20 Gew.-% Eisen andere einzeln max. 0,05 Gew.-%, insgesamt max. 0,15 Gew.-%, und als Rest Aluminium und unvermeidbaren Verunreinigungen besteht.To achieve the object according to the invention, the alloy is made of 6.0 to 8.0 % By weight zinc 2.0 to 3.5 % By weight magnesium 1.6 to 1.9 % Copper 0.05 to 0.30 % By weight zirconium Max. 0.30 Wt% chromium Max. 0.50 Wt% manganese Max. 0.10 % By weight titanium Max. 0.20 % By weight silicon Max. 0.20 Wt% iron others individually max. 0.05% by weight, max. 0.15 wt .-%, and the balance is aluminum and unavoidable impurities.

Der erfindungsgemäss eingesetzte Werkstoff ist gegenüber vergleichbaren hochfesten Werkstoffen der Gruppe AA7xxx leichter giessbar und durch Pressen und Walzen auch leichter warm zu verarbeiten. Die Korrosionsbeständigkeit ist ebenfalls wesentlich besser als bei vergleichbaren Legierungen nach dem Stand der Technik.The material used according to the invention is opposite comparable high-strength materials of the group AA7xxx easier to cast and lighter by pressing and rolling to be processed warm. The corrosion resistance is also much better than comparable alloys According to the state of the art.

Aufgrund der ähnlichen chemischen und physikalischen Eigenschaften von Aluminium- und Magnesiumwerkstoffen wird die Verbindung von Bauteilen aus Magnesiumwerkstoffen oder aus Aluminium- und Magnesiumwerkstoffen bevorzugt mit dem erfindungsgemässen Element aus einer Aluminiumlegierung durchgeführt.Because of the similar chemical and physical properties of aluminum and magnesium materials Connection of components made of magnesium materials or Aluminum and magnesium materials preferably with the one according to the invention Aluminum alloy element carried out.

Für die einzelnen Legierungselemente gelten die folgenden Vorzugsbereiche (Gew.-%): Zink 6,6 bis 7,3, insbesondere 6,7 bis 7,1 Magnesium 2,3 bis 3,2, insbesondere 2,6 bis 2,9 Zirkonium max. 0,20, insbesondere 0,13 bis 0,18 Chrom max. 0,10, insbesondere max. 0,05 Mangan max. 0,25, insbesondere max. 0,15 Titan max. 0,05 Silizium max. 0,15, insbesondere max. 0,12 Eisen max. 0,15, insbesondere max. 0,12. The following preferred ranges (% by weight) apply to the individual alloy elements: zinc 6.6 to 7.3, in particular 6.7 to 7.1 magnesium 2.3 to 3.2, in particular 2.6 to 2.9 zirconium Max. 0.20, especially 0.13 to 0.18 chrome Max. 0.10. in particular max. 0.05 manganese Max. 0.25. in particular max. 0.15 titanium Max. 0.05 silicon Max. 0.15. in particular max. 0.12 iron Max. 0.15. in particular max. 0.12.

Geeignetes Vormaterial zur Fertigung von Schrauben und Nieten sind stranggepresste Stangen, wobei als Vormaterial für Stanznieten beispielsweise auch der Einsatz von Blech denkbar ist.Suitable raw material for the production of screws and rivets are extruded rods, being used as a material for Punch rivets, for example, the use of sheet metal is also conceivable is.

Bei der Herstellung von Verbindungselementen über Stangenmaterial wird zunächst die Legierung zu einem Pressbolzen vergossen und der Bolzen nach einer Homogenisierungsglühung zu einem stangenförmigen Vormaterial verpresst. Nach einem Lösungsglühen und Abschrecken des Vormaterials wird dieses in der Regel durch Kaltumformen zu den Verbindungselementen verarbeitet, die anschliessend zur Erzielung der gewünschten Festigkeit bei ausreichender Dehnung einer Warmaushärtung unterworfen werden. Bei einer besonders bevorzugten Fertigungsvariante, die einen höheren Kaltumformungsgrad mit entsprechend erhöhter Festigkeit zulässt und zudem zu einer besseren Korrosionsbeständigkeit führt, wird vor dem Kaltumformen des Vormaterials zur Schraube oder zum Niet eine Rückbildungsglühung bei einer Temperatur von etwa 180 bis 260° C während einer Zeitdauer von etwa 5 sec bis 120 min durchgeführt. Hierbei gilt eine kurze Behandlungszeit für eine hohe Wärmebehandlungstemperatur.In the production of fasteners using bar stock the alloy first becomes a press bolt shed and the bolt after a homogenization annealing pressed into a rod-shaped primary material. After one Solution annealing and quenching of the primary material becomes this usually by cold forming to the connecting elements processed, which then to achieve the desired Strength with sufficient stretch of a thermoset be subjected. In a particularly preferred Manufacturing variant that has a higher degree of cold forming with correspondingly increased strength and also allows leads to better corrosion resistance, is before Cold forming of the raw material into a screw or rivet recovery annealing at a temperature of about 180 up to 260 ° C for a period of about 5 seconds to 120 minutes carried out. A short treatment time applies to a high heat treatment temperature.

Beim erfindungsgemässen Verbindungselement können mit einer Warmaushärtung zum Zustand T 6 oder T 7 Festigkeiten bis zu 740 MPa erzielt werden.In the connecting element according to the invention, a Heat curing to T 6 or T 7 strength up to 740 MPa can be achieved.

Die fertig wärmebehandelten Schrauben oder Nieten können je nach Anwendungsbereich eloxiert, beschichtet, lackiert oder auf andere Weise gegen Korrosionseinflüsse weiter geschützt werden. Zur verbesserten Lösbarkeit der Verbindung können Schrauben beispielsweise auch mit einer Teflon- oder einer Ormocere-Schicht versiegelt sein. In gewissen Fällen ist auch eine Dichtung und Verklebung entsprechend dem bekannten Sped-Cap-Verfahren vorteilhaft.The finished heat-treated screws or rivets can each anodized, coated, painted or according to application further protected against corrosion in another way become. To improve the releasability of the connection Screws, for example, also with a Teflon or Ormocere layer to be sealed. In certain cases also a seal and adhesive according to the known Sped-cap procedure advantageous.

Die Vorteilhaftigkeit der erfindungsgemässen eingesetzten Legierungen ergibt sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele.The advantage of the used according to the invention Alloys result from the description below preferred embodiments.

BeispieleExamples

7 Legierungen mit einer Zusammensetzung gemäss Tabelle 1 wurden zu je einem Stranggussbolzen von 220 mm  und einer Länge von etwa 1500 mm vergossen. Eine Kornfeinung mit Ti5B1-Draht wurde direkt in der Giessrinne durchgeführt.7 alloys with a composition according to Table 1 were each a continuous cast bolt of 220 mm  and a length of about 1500 mm. A grain refinement with Ti5B1 wire was carried out directly in the gutter.

Der Strangguss wurde bei allen Legierungen unter folgenden Bedingungen durchgeführt: Absenkgeschwindigkeit 6,5 bis 7 m/min Kühlwasser 75 l/min Meniskusstand 42 mm Wasserstand 40 cm unter der Kokille The continuous casting was carried out for all alloys under the following conditions: Lowering speed 6.5 to 7 m / min cooling water 75 l / min Meniscus stand 42 mm Water level 40 cm under the mold

Vor dem Aufteilen zu je zwei 660 mm langen Bolzen wurde eine Glühung bei 460° während 6 h durchgeführt. Anschliessend erfolgte eine Hochglühung bei 470°/3h + 480°/18h (Legierung 6 wurde mit 470°C/21 h geglüht).Before dividing into two 660 mm long bolts, one was Annealing carried out at 460 ° for 6 h. Subsequently there was an annealing at 470 ° / 3h + 480 ° / 18h (alloy 6 was annealed at 470 ° C / 21 h).

In jeder Legierung wurde ein Flachprofil 10 x 50 mm und eine Rundstange 40 mm Durchmesser indirekt gepresst. Die Bolzentemperatur betrug ca. 230 bis 260°C, die Rezipiententemperatur lag bei etwa 300°C. Die Pressgeschwindigkeit betrug etwa 2 bis 2,8 m/min.In each alloy there was a flat profile 10 x 50 mm and one Round bar 40 mm diameter pressed indirectly. The stud temperature was about 230 to 260 ° C, the recipient temperature was around 300 ° C. The pressing speed was about 2 to 2.8 m / min.

Die Lösungsglühung erfolgte bei einer Temperatur von 470 ± 3°C während einer Zeitspanne von 0,5 h.Solution annealing was carried out at a temperature of 470 ± 3 ° C over a period of 0.5 h.

In Tabelle 2 sind die Daten aller Legierungen, die am Flachprofil 10 x 50 mm gewonnen wurden, wiedergegeben. Die Wärmebehandlung wurd in jedem Fall wie folgt durchgeführt: Lösungsglühen 470°C/0,5 h Recken ≤ 1% Zwischenlagern ≤ 1 Tag Aushärten Zustand T 651: 130°C/14h
Zustand T 7351: 105°C/5h + 175°C/7h Table 2 shows the data of all alloys obtained on the 10 x 50 mm flat profile. The heat treatment was carried out in each case as follows: Solution annealing 470 ° C / 0.5 h Stretchers ≤ 1% Interim storage ≤ 1 day Harden Condition T 651: 130 ° C / 14h
Condition T 7351: 105 ° C / 5h + 175 ° C / 7h

Von allen Legierungen wurden Zugversuche und Kerbzugversuche in Längsrichtung durchgeführt. Die bruchmechanischen Kennwerte wurden bei allen Legierungen in Querrichtung gemessen. Tensile tests and notch tensile tests were carried out on all alloys performed in the longitudinal direction. The fracture mechanics Characteristic values were measured in the transverse direction for all alloys.

Bei den in Tabelle 2 angegebenen Festigkeitswerten ist zu bedenken, dass die Zugfestigkeit am Verbindungselement höhere Werte erreicht, da eine Kaltverfestigung hinzukommt.With the strength values given in table 2 is too keep in mind that the tensile strength at the fastener is higher Values achieved because of strain hardening.

Alle Legierungen in den beiden Wärmebehandlungszuständen wurden einem Spannungsrisskorrosionstest unterzogen. Alle Proben überstanden die Prüfung ohne Spannungskorrosionsrisse. Leg. Nr. Si Fe Cu Mn Mg Cr Zn Zr 1 0.008 0.02 1.8 - 2.7 - 6.9 0.14 2 0.10 0.06 1.8 - 2.7 - 6.9 0.15 3 0.10 0.19 1.7 - 2.7 - 6.9 0.15 4 0.10 0.20 1.9 0.20 2.7 - 6.9 0.14 5 0.04 0.06 1.8 0.20 2.7 - 6.8 0.14 6 0.04 0.06 1.9 - 2.0 - 8.8 0.15 7 0.04 0.06 1.7 0.23 2.7 0.25 6.0 - Leg.Nr. Zustand Zugrichtung Rm (MPa) Rp0.2 (MPa) A5 (%) Ag (%) RmK/ Rp0.2 KC MPa m½ T651 L 708 680 10.5 6.6 1.06 Q 654 532 12.7 7.6 - 23.0 1 T7351 L 614 578 10.0 4.77 1.15 Q 578 524 12.5 6.5 - 27.4 T651 L 698 670 10.2 5.40 1.05 Q 644 584 12.7 8.5 - 20.7 2 T7351 L 610 576 9.4 4.28 0.81 Q 556 494 12.7 6.8 - 33.4 T651 L 700 676 10.4 4.54 0.857 Q 634 585 11.5 6.1 - 19.8 3 T7351 L 602 559 9.9 5.03 1.04 Q 550 491 12.3 7.6 - 33.0 T651 L 702 671 10.3 5.99 0.88 Q 642 583 10.8 6.9 - 22.2 4 T7351 L 614 585 8.1 4.07 0.92 Q 570 498 11.5 6.8 - 30.8 T651 L 713 686 11.0 5.77 1.03 (37) Q 653 589 12.2 7.1 - 28 5 T7351 L 624 592 9.1 4.37 1.10 (60) Q 582 524 12.6 7.2 - 32.1 T651 L 720 675 11.9 5.55 1.10 Q 634 577 12.1 6.5 - 29.2 6 T7351 L 574 513 12.6 5.06 1.22 Q 521 460 13.4 6.4 - 73.8 T651 Q L 682 634 11.2 7.84 0.867 Q 622 522 12.1 8.6 - 34.5 7 T7351 L 609 576 9.2 4.41 0.971 Q 547 456 12.0 7.6 - 45.7 All alloys in the two heat treatment conditions were subjected to a stress corrosion cracking test. All samples passed the test without stress corrosion cracks. Leg. No. Si Fe Cu Mn Mg Cr Zn Zr 1 0.008 0.02 1.8 - 2.7 - 6.9 0.14 2nd 0.10 0.06 1.8 - 2.7 - 6.9 0.15 3rd 0.10 0.19 1.7 - 2.7 - 6.9 0.15 4th 0.10 0.20 1.9 0.20 2.7 - 6.9 0.14 5 0.04 0.06 1.8 0.20 2.7 - 6.8 0.14 6 0.04 0.06 1.9 - 2.0 - 8.8 0.15 7 0.04 0.06 1.7 0.23 2.7 0.25 6.0 - Leg.No. Status Direction of pull Rm (MPa) Rp 0.2 (MPa) A 5 (%) Ag (%) R mK / Rp 0.2 K C MPa m ½ T651 L 708 680 10.5 6.6 1.06 Q 654 532 12.7 7.6 - 23.0 1 T7351 L 614 578 10.0 4.77 1.15 Q 578 524 12.5 6.5 - April 27 T651 L 698 670 10.2 5.40 1.05 Q 644 584 12.7 8.5 - 20.7 2nd T7351 L 610 576 9.4 4.28 0.81 Q 556 494 12.7 6.8 - 33.4 T651 L 700 676 10.4 4.54 0.857 Q 634 585 11.5 6.1 - 19.8 3rd T7351 L 602 559 9.9 5.03 1.04 Q 550 491 12.3 7.6 - 33.0 T651 L 702 671 10.3 5.99 0.88 Q 642 583 10.8 6.9 - 22.2 4th T7351 L 614 585 8.1 4.07 0.92 Q 570 498 11.5 6.8 - 30.8 T651 L 713 686 11.0 5.77 1.03 (37) Q 653 589 12.2 7.1 - 28 5 T7351 L 624 592 9.1 4.37 1.10 (60) Q 582 524 12.6 7.2 - 32.1 T651 L 720 675 11.9 5.55 1.10 Q 634 577 12.1 6.5 - 29.2 6 T7351 L 574 513 12.6 5.06 1.22 Q 521 460 13.4 6.4 - 73.8 T651 Q L 682 634 11.2 7.84 0.867 Q 622 522 12.1 8.6 - 34.5 7 T7351 L 609 576 9.2 4.41 0.971 Q 547 456 12.0 7.6 - 45.7

Claims (10)

  1. Connecting element consisting of an aluminium alloy of the AlZnMgCu type, comprising a shank for connecting components made of aluminium, magnesium or alloys thereof, in particular a screw or a rivet, characterised in that the alloy consists of 6.0 to 8.0 % by weight zinc 2.0 to 3.5 % by weight magnesium 1.6 to 1.9 % by weight copper 0.05 to 0.30 % by weight zirconium max. 0.30 % by weight chromium max. 0.50 % by weight manganese max. 0.10 % by weight titanium max. 0.20 % by weight silicon max. 0.20 % by weight iron
    and other elements, individually to a max, of 0.05 % by weight and altogether to a max. of 0.15 % by weight, with the balance aluminium and unavoidable impurities.
  2. Connecting element according to claim 1, characterised in that the alloy contains 6.6 to 7.3, preferably 6.7 to 7.1 % by weight zinc.
  3. Connecting element according to claim 1 or claim 2, characterised in that the alloy contains 2.3 to 3.2, preferably 2.6 to 2.9 % by weight magnesium.
  4. Connecting element according to one of claims 1 to 3, characterised in that the alloy contains a max. of 0.20, preferably 0.13 to 0.18 % by weight zirconium.
  5. Connecting element according to one of claims 1 to 4, characterised in that the alloy contains a max. of 0.10, preferably a max. of 0.05 % by weight chromium.
  6. Connecting element according to one of claims 1 to 5, characterised in that the alloy contains a max. of 0.25, preferably a max. of 0.15 % by weight manganese.
  7. Connecting element according to one of claims 1 to 6, characterised in that the alloy contains a max. of 0.05 % by weight titanium.
  8. Connecting element according to one of claims 1 to 7, characterised in that the alloy contains a max. of 0.15, preferably a max. of 0.12 % by weight silicon.
  9. Connecting element according to one of claims 1 to 8, characterised in that the alloy contains a max. of 0.15, preferably a max. of 0.12 % by weight iron.
  10. Process for the production of a connecting element according to one of claims 1 to 9 by casting the alloy into a billet, homogenising the billet and pressing the billet to form a base material, solution annealing and quenching the base material, and processing the base material into connecting elements by cold forming and artificial ageing of the connecting elements, characterised in that reversion annealing is carried out a temperature of 180 to 260°C for 5 sec to 120 min prior to the cold forming.
EP97810129A 1997-03-06 1997-03-06 Screw or rivet from an aluminium alloy Expired - Lifetime EP0863220B2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DK97810129T DK0863220T3 (en) 1997-03-06 1997-03-06 connection element
ES97810129T ES2150208T5 (en) 1997-03-06 1997-03-06 SCREW OR REMACHE BASED ON AN ALUMINUM ALLOY.
DE59702201T DE59702201D1 (en) 1997-03-06 1997-03-06 Fastener
PT97810129T PT863220E (en) 1997-03-06 1997-03-06 LIGHTING ELEMENT
EP97810129A EP0863220B2 (en) 1997-03-06 1997-03-06 Screw or rivet from an aluminium alloy
AT97810129T ATE195557T1 (en) 1997-03-06 1997-03-06 CONNECTING ELEMENT
GR20000402548T GR3034859T3 (en) 1997-03-06 2000-11-15 Connecting element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP97810129A EP0863220B2 (en) 1997-03-06 1997-03-06 Screw or rivet from an aluminium alloy

Publications (3)

Publication Number Publication Date
EP0863220A1 EP0863220A1 (en) 1998-09-09
EP0863220B1 true EP0863220B1 (en) 2000-08-16
EP0863220B2 EP0863220B2 (en) 2003-10-01

Family

ID=8230165

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97810129A Expired - Lifetime EP0863220B2 (en) 1997-03-06 1997-03-06 Screw or rivet from an aluminium alloy

Country Status (7)

Country Link
EP (1) EP0863220B2 (en)
AT (1) ATE195557T1 (en)
DE (1) DE59702201D1 (en)
DK (1) DK0863220T3 (en)
ES (1) ES2150208T5 (en)
GR (1) GR3034859T3 (en)
PT (1) PT863220E (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9249823B2 (en) 2009-09-02 2016-02-02 Profil Verbindungstechnik Gmbh & Co. Kg Self-piercing nut element and component assembly consisting of the nut element and a sheet metal part
RU2778434C1 (en) * 2018-11-12 2022-08-18 Алерис Роллд Продактс Джермани Гмбх 7xxx SERIES ALUMINUM ALLOY PRODUCT
EP3833794B1 (en) * 2018-11-12 2023-01-04 Novelis Koblenz GmbH 7xxx-series aluminium alloy product

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6267684B1 (en) 1997-04-30 2001-07-31 Allfast Fastening Systems, Inc. Rivets and rivet manufacturing methods
DE19840298A1 (en) * 1998-09-04 2000-03-16 Ejot Verbindungstech Gmbh & Co Self-tapping light metal screw and process for their manufacture
RU2165995C1 (en) * 1999-10-05 2001-04-27 Государственное предприятие "Всероссийский научно-исследовательский институт авиационных материалов" Highly string aluminium-based alloy and product made of said alloy
JP3543267B2 (en) * 2000-05-31 2004-07-14 福井鋲螺株式会社 Aluminum driven rivets
DE102005014606A1 (en) * 2005-03-31 2006-10-05 Richard Bergner Verbindungstechnik Gmbh & Co. Kg Method for producing a fastening element and fastening element, in particular screw
JP6091046B2 (en) 2010-11-10 2017-03-08 株式会社トープラ Aluminum alloy bolt manufacturing method and aluminum alloy bolt
JP7265629B2 (en) 2019-01-18 2023-04-26 ノベリス・コブレンツ・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング 7xxx series aluminum alloy products

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2314183A1 (en) * 1973-03-22 1974-10-03 Herbert Dobbertin Aluminium alloy rivet stock heat treatment - to avoid time-dependency of rivetting properties
FR2482982A1 (en) * 1980-05-23 1981-11-27 Fraimant Jean Jacques Aluminium alloy bolts, nuts and similar parts used for assemblies - where specific compsn. and heat treatment provides high corrosion resistance when parts are subjected to tensile stress
EP0462055A1 (en) † 1990-06-11 1991-12-18 Alusuisse-Lonza Services Ag AlZnMg-alloy superplastic preform material
GB9016694D0 (en) * 1990-07-30 1990-09-12 Alcan Int Ltd Ductile ultra-high strength aluminium alloy extrusions
WO1996034993A1 (en) * 1995-05-01 1996-11-07 Mcdonnell Douglas Corporation Preparation of pre-coated aluminum alloy articles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9249823B2 (en) 2009-09-02 2016-02-02 Profil Verbindungstechnik Gmbh & Co. Kg Self-piercing nut element and component assembly consisting of the nut element and a sheet metal part
RU2778434C1 (en) * 2018-11-12 2022-08-18 Алерис Роллд Продактс Джермани Гмбх 7xxx SERIES ALUMINUM ALLOY PRODUCT
EP3833794B1 (en) * 2018-11-12 2023-01-04 Novelis Koblenz GmbH 7xxx-series aluminium alloy product

Also Published As

Publication number Publication date
EP0863220A1 (en) 1998-09-09
DE59702201D1 (en) 2000-09-21
PT863220E (en) 2000-12-29
ES2150208T5 (en) 2004-06-16
ES2150208T3 (en) 2000-11-16
DK0863220T3 (en) 2000-12-27
ATE195557T1 (en) 2000-09-15
GR3034859T3 (en) 2001-02-28
EP0863220B2 (en) 2003-10-01

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