Preparation method of 6111-T7 state aluminum alloy plate

Abstract

The invention relates to a preparation method of a 6111-T7 state aluminum alloy plate, and belongs to the technical field of aluminum alloy material preparation. B, casting; c, homogenizing heat treatment; d, hot rolling is conducted, specifically, the aluminum alloy cast ingot subjected to homogenizing heat treatment is directly subjected to hot rolling to obtain a hot-rolled coil, and the coiling temperature is 310-330 DEG C; e, cold rolling: directly carrying out cold rolling on the hot-rolled coil to obtain an aluminum alloy plate; f, solid solution quenching is conducted, specifically, the aluminum alloy plate is heated to 520-540 DEG C, water quenching is conducted after heat preservation is conducted for 10 S, the temperature of the aluminum alloy plate subjected to water quenching is not higher than 150 DEG C, and air cooling is conducted to 20-25 DEG C; g, pre-aging treatment is conducted, specifically, the aluminum alloy plate is heated to 75-95 DEG C and then coiled, and after coiling is completed, the aluminum alloy plate is naturally cooled to 20-25 DEG C; and H, overaging heat treatment is conducted, specifically, after the aluminum alloy coil is heated to 230 DEG C, heat preservation is conducted for 10-14 h, and the 6111-T7 aluminum alloy plate is obtained. The 6111-T7 aluminum alloy plate prepared through the method has moderate strength and good corrosion resistance, and the application range of the 6111 alloy in the field of automobile structural parts is widened.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy material preparation, and relates to a preparation method of a 6111-T7 state aluminum alloy plate. Background technique [0002] In order to promote the sustainable development of the automobile industry, on the premise of ensuring the rigidity, strength and safety performance of automobile materials, the use of lightweight aluminum alloys to reduce the weight of automobiles plays a very important role in improving fuel efficiency and reducing pollution. [0003] 6xxx aluminum alloy has good strength and formability, easy processing and good comprehensive performance, and is widely used in the automotive field. 6111-T4 has good deep-drawing properties in the low-strength state, and has high strength due to heat treatment after paint baking. It is mainly used in the field of automotive body outer panels in North America. At present, the research on 6111 aluminum alloy automobile sheet mainl...

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Problems solved by technology

However, there are not many studies on the T7 state applied to automotive structural parts and the analysis of the corrosion resistance state of 6111 alloy, and even fewer can directly guide industrial production.

Because the automotive structural parts are not painted, not only good corrosion resistance is required, but also the aluminum alloy sheet needs to have medium strength before stamping, because if the strength is too low, it cannot meet the strength requirements of the structural parts, and if the strength is too high It will lead to product defects in the process of stamping and forming aluminum alloy sheets

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