The yield strength of aluminum 7000 series is usually between 300-500MPa, which can effectively resist deformation caused by external loads. The alloy has good heat treatment properties and corrosion resistance. Heat treatment can significantly increase its strength and hardness while improving its corrosion resistance.
7 series aluminum alloys are widely used in the manufacture of aircraft structural parts and other parts requiring high strength, such as engine parts, landing gear, seats, etc. In addition, 7 series aluminum alloy can also be used to manufacture other mechanical parts that require high strength, high hardness and wear resistance, such as gears, shaft parts, etc.
Matweb aluminum 7075 is one of its main grade. It can be used in the aerospace industry, blow molding (bottle) molds, ultrasonic plastic welding molds, golf ball heads, shoe molds, paper molds, foam molding molds, dewaxing molds, templates, fixtures, mechanical equipment, aluminum alloy bicycle frame.
7075 aluminum's medium and thick plates, extrusions, free forgings and die forgings are used for the aircraft structural parts. The requirements for alloys in manufacturing such parts are high resistance to spalling corrosion, stress corrosion cracking, fracture toughness and fatigue resistance.
High strength: The strength of 7 series aluminum alloy is much better than that of mild steel. Its main alloying elements are zinc and magnesium. The MgZn2 structure formed by zinc and magnesium has obvious strengthening effect, making the heat treatment effect of 7 series aluminum plates far better than other aluminum plates. As the zinc and magnesium content increases, the strength of the aluminum plate will further increase. Especially when the temperature is lower than 150℃, the performance is better.
High mechanical properties: 7 series aluminum alloys have excellent mechanical properties, including high strength, hardness and good plasticity. Due to the small and even distribution of internal crystals, the 7 series aluminum plate has super wear resistance, and its high level of drilling performance is also rare. These properties make it suitable for manufacturing aircraft parts that need to withstand heavy loads and high-speed movements.
Strong corrosion resistance: 7 series aluminum alloy can resist corrosion and oxidation when exposed to the atmosphere. It has good resistance to stress corrosion and spalling corrosion, and performs well in the processing of high-stress structural parts. This makes it suitable for aircraft components in marine environments and other corrosive environments.
Easy to process: 7000 aluminum alloys can be processed into parts of various shapes and sizes through various processing methods such as casting, forging, extrusion and rolling, which can meet the strict requirements of aircraft manufacturing.
Lightweight: Because 7xxx aluminum alloy has high strength and hardness and relatively low density, it is suitable for manufacturing lightweight aircraft parts, helping to improve the fuel efficiency and performance of aircraft.
Good thermal conductivity: 7 series aluminum alloy has good thermal conductivity and can effectively transfer heat. It is suitable for manufacturing aircraft parts that need to withstand high temperatures and dissipate heat.
Disadvantages: Adding zinc and magnesium elements can improve the strength of 7 series aluminum plates. However, with the increase of zinc and magnesium elements, the resistance to stress corrosion and spalling corrosion of 7 series aluminum plates will also decrease. It should be noted that the 7 series aluminum alloy has a higher hardness and is more difficult to process, requiring fine machining and heat treatment operations.
Haomei Aluminum has different grades of 7000 aluminum alloys like matweb aluminum 7075 and 7050 aluminum alloy. Welcome to leave message below to inquire what you need.
Original Source:https://www.aircraftaluminium.com/a/what-are-properties-and-uses-of-aluminium-7000-series.html
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