Aluminum, zinc, copper and magnesium alloy and machining process thereof

Abstract

The invention discloses an aluminum, zinc, copper and magnesium alloy and a machining process thereof. The aluminum, zinc, copper and magnesium alloy comprises, by weight, 0.1%-0.15% of metallic zirconium and 0.03%-0.08% of metallic nickel. The process comprises the steps that the aluminum, zinc, copper and magnesium alloy is provided; the aluminum, zinc, copper and magnesium alloy is placed intoa die to be stamped and molded; the stamped and molded aluminum, zinc, copper and magnesium alloy is heated to 460 DEG C to 499 DEG C to be subject to heat treatment; the aluminum, zinc, copper and magnesium alloy subject to heat treatment is subject to quenching treatment; and the aluminum, zinc, copper and magnesium alloy subject to quenching treatment is heated to 100 DEG C to 150 DEG C to be subject to artificial aging treatment. By means of the above manner, the stamping and molding performance of the artificial aging treatment can be improved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloys, in particular to an aluminum-zinc-copper-magnesium alloy and a processing technology thereof. Background technique [0002] With the continuous increase in the number of vehicles, the air pollution caused by exhaust emissions cannot be ignored. The lightweight of vehicles can directly reduce fuel consumption and exhaust emissions, so it has attracted extensive attention from the automotive industry. The density of aluminum is 2.7g / cm 3 , which is almost one-third of the density of steel (7.8g / cm 3 ), if the steel in the car is replaced by aluminum, the weight of the car can be significantly reduced. At present, aluminum alloy sheets have been used in automobiles, but most of them are used in the inner and outer panels of the body, while the structural parts of automobiles are still mainly made of high-strength steel materials. If the aluminum alloy sheets with higher strength can be use...

AI Technical Summary

Problems solved by technology

At present, the strength of 7 series aluminum alloys can meet the strength requirements of automobile structural parts, but the processing technology of 7 series aluminum alloys cannot complete stamping and forming well. Stamping and forming, it is easy to crack during room temperature stamping and forming, or hysteresis cracking occurs; if you choose to stamp and form in other low-strength states, such as solution quenching + natural aging state, although to a certain extent there is It is beneficial to improve the stamping performance, but on the one hand, the improvement range is limited, and on the other hand, the strength of the peak state after further aging cannot meet the application requirements.

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