Aluminium 7075
Material Typ
Metall
Material Name
Aluminium 7075
Alternative Namen
AlZn5.5MgCu | AA7075 | A97075 | AlZnMgCu1.5 | 3.4365
Prozess-Kompatibilität
CNC-Fräsen, CNC-Drehen
Aluminium 7075 in der CNC-Bearbeitung
Aluminum 7075 is a strong and lightweight alloy often chosen because of its high strength-to-weight ratio. It is used in CNC machining, but it comes with challenges.
Carbide tools, known for their hardness, are commonly used while optimizing cutting speeds and feeds is important to balance material removal rates and tool life. The alloy's strength necessitates rigid setups to minimize vibrations during machining. Adequate cooling using appropriate coolant is also important to dissipate the heat generated. Lubrication helps reduce friction and enhance tool life. The mechanical properties of 7075 aluminum alloy vary with tempering. 7075-O is corrosion-resistant with a max tensile strength of 280 MPa. T6 heat treatment increases strength to 540 MPa. T7 resists stress corrosion. RRA involves multistage heat treatment, restoring strength to T6 levels.
Belonging to the 7000 series, this alloy is extensively used in marine, automotive, and aviation transportation. Its applications range from rock climbing gear, bicycle components, inline skating frames to hobby-grade RC models and ,hang glider airframes. Moreover, the 7075 alloy is also used for lacrosse sticks, camping utensils, competition yo-yos, and drag racing engine connecting rods. While aluminum rods in drag racing engines may have a shorter fatigue life than forged steel rods, they offer reduced mass, minimizing mechanical stress during high-speed, full-throttle operations.
Tabelle Eigenschaften of Aluminum 7075
| MECHANISCHE EIGENSCHAFTEN | |
|---|---|
| Zugfestigkeit (Ultimate Tensile Strength) | ~570 MPa |
| Streckgrenze | ~500 MPa |
| Elastizitätsmodul (Elastizität) | 71 GPa |
| Dehnung beim Bruch | 11 % |
| Physikalische Eigenschaften | |
| Korrosionsbeständigkeit | Gut |
| Magnetismus | Nicht-magnetisch |
| Schweißeignung | Fair(with certain precautions) |
| Thermische Eigenschaften | |
| Maximale Betriebstemperatur | ~120 °C(for continuous use) |
| Thermal Expansion Coefficent | 23,2 x 10^-6/ºC |
| Wärmeleitfähigkeit | 130 W/(m⋅K) |
| Elektrische Eigenschaften | |
| Elektrischer spezifischer Widerstand | 0.000032 ohm-cm |
| ESD-Sicherheit | Generally ESD safe |
Grundkenntnisse of Aluminum 7075
What is Aluminum 7075?
7075 aluminum alloy, or AA7075, was initially developed secretly by Sumitomo Metal in 1935. The alloy was reverse engineered by Alcoa in 1943 after examining a captured Japanese aircraft. It was standardized for aerospace use in 1945. 7075 became a key material for airframe production in the Imperial Japanese Navy.
It is a strong and durable material used in structural applications, especially in aircraft components. Its main alloying element is zinc. It has good mechanical properties like fatigue resistance, ductility, toughness, and high strength. Despite being prone to embrittlement due to microsegregation, it surpasses the corrosion resistance of alloys in the 2000 series.
The alloy typically contains 5.6–6.1% zinc, 2.1–2.5% magnesium, 1.2–1.6% copper, and trace amounts of silicon, iron, manganese, titanium, chromium, and other metals. It has various tempers, such as 7075-0, 7075-T6, and 7075-T651, which offer different characteristics.
Advantages of Aluminum 7075
- Hohe Festigkeit
- Good ductility and toughness
- Leichtgewicht
- Corrosion Resistance (comparable to other aluminum alloys)
- Fatigue Resistance
- Versatility in Tempers
- Weldability and Machinability
- Proven Aerospace Use
- Developed for High-Stress Applications
- Historical Significance (World War II and aerospace standardization)
Anwendungen von Aluminium 7075
- Aircraft wings and fuselage components
- Automotive chassis parts
- Rahmen für Fahrräder
- Military armored vehicle components
- Climbing carabiners
- Marine applications requiring corrosion resistance
- High-strength tools and equipment
- Maschinenbauteile
- Motorsports racing car and motorcycle parts
- Certain consumer electronics components
Machining Aluminum 7075 FAQs zum Kauf
Andere Materialien
Aluminium 6082
Aluminium 6082 ist für seine hohe Korrosionsbeständigkeit und außergewöhnliche Festigkeit bekannt und wird gerne für Anwendungen unter hoher Belastung verwendet.
Aluminium 6061
Aluminium 6061 (CNC) ist die beliebteste Aluminiumlegierung. Sie hat ein gutes Verhältnis von Festigkeit zu Gewicht, eine hervorragende Bearbeitbarkeit und eine natürliche Korrosionsbeständigkeit.
Aluminium 5083
Aluminium 5083 ist eine korrosionsbeständige, hochfeste, nicht wärmebehandelbare Legierung, die häufig in der CNC-Bearbeitung verwendet wird.
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