7075 Aluminum Alloy Blocks

The 7075 Aluminum Alloy Blocks is the most typical aviation super duralumin. It is not only an "old" AL-Zn-Mg-Cu series alloy, but also a young alloy with strong "energy". It is said that it is "old" because it is the first A finalized super duralumin, which was finalized in 1944, was used to make airplanes in the United States, Japan, and the former Soviet Union. It is only 74 "years old" and is still in the "middle-aged" stage. It is said to be "young" because it is now It is also the main material for the key structure of aerospace vehicles. It seems that only when composite materials can be produced in large quantities and the price is reduced to be competitive with super duralumin, super duralumin will withdraw from the stage of history and give way to composite materials.
 
After more than 70 years of development, 7075 Aluminum Alloy Blocks have formed a considerable family. Now the commonly used alloys are 7075/7175/7475 alloys. 7275 alloy has become a very useful alloy due to its unsatisfactory performance, while 7375 alloy has been thoroughly used. Eliminate it and never use it again.
 
7075 Aluminum Alloy Blocks is an aluminum-zinc-magnesium-copper high-strength deformed aluminum alloy that can be heat-treated and strengthened. It is the veteran of super-duralumin, but it is not the big one, because there are more powerful and can be processed by The semi-finished products are used to manufacture various structural parts, especially aerospace vehicle structural parts. It is the most widely used high-strength aluminum alloy today, as large as the long truss of the front fuselage of the C919 aircraft and the forgings of the passenger observation window frame. Middle fuselage sheet bends and long girders, keel beam webs, floor turning beams, middle and rear fuselage long girders, passenger observation window frame forgings, cargo door frames, front pressure frame edges of the nose, cabin door frames, etc.; as small as mobile phones shell. It has a variety of heat treatment states: T6, T73, T76, T77. The T6 state material has the highest mechanical strength performance, but the fracture toughness is low, it is sensitive to stress corrosion, and its toughness decreases with the decrease of temperature. Therefore, the T6 state material is not suitable for manufacturing low-temperature structural parts and workpieces; T73 material has the lowest strength , But has quite high fracture toughness, good stress crack resistance and spalling corrosion resistance; T76 material has higher strength than T73 material and higher stress corrosion cracking resistance than T6 material. The static strength performance of 7075 Aluminum Alloy Blocks is higher than that of 2024 and 2124 alloy, and the fatigue performance is equivalent to it. O state and W state materials have good room temperature molding properties.