The process of 7005 is as follows: the ideal heat treatment system of the alloy is water quenching after solution treatment at 470℃, and the artificial aging system is two-stage aging100 ℃× 8 h+120 ℃× 24 h. After heat treatment, the tensile strength of the alloy at room temperature reaches more than 400 MPa, and the corrosion resistance is good, and the precipitated phase is fine and dispersed, which has a good strengthening effect on the alloy.
The process of 2024 is as follows: the heat treatment process of 2024 aluminum alloy depends on its size (such as plate thickness) and service temperature. It is suggested that 2024 aluminum alloy be heated to 495 degrees 10 minute for rapid water quenching, and then aged at 100 degrees 10 hour to obtain higher strength and hardness. If the hardness is higher, it can be deformed (for example, thinning the plate with a thickness of 10mm to 8mm), and then recrystallizing at 170 degrees for 5- 10 hours, which can obtain higher hardness, but the plastic loss is greater.
606 1 process: heat preservation at 535 5℃ for 5.5 0.5 hours, and then water quenching at 8010℃ for at least 5 minutes. Then aging in a low temperature furnace at 65438 0655℃ for 4 0.5 hours. After coming out, the hardness generally reaches HB80-90, the elongation is more than 8%, and the tensile strength is more than 250MPa.
The key technical problem of aluminum alloy is heat preservation. It is necessary to accurately formulate parameters and implement them according to the process, from high temperature furnace (solid melting furnace) to water quenching as soon as possible, otherwise the final strengthening effect will be affected! ! !