Cast rolling production method of 4343 aluminum alloy plate

Abstract

The invention belongs to the technical field of aluminum alloy technology, and in particular relates to a cast rolling production method of a 4343 aluminum alloy plate. The method comprises the following steps of: after dosing and melting, modifying the flowing aluminum alloy melted body; performing cast rolling on the aluminum alloy directly by a cast rolling unit after modification; adjusting the pressure of cooling water at 0.2-0.4MPa; controlling the cast rolling speed at 0.6-0.8m / min so as to ensure that the cast rolling speed is matched with the crystallizing speed; and after finishing vertical plates, feeding the aluminum alloy plates to a coiling part to obtain the product 4343 aluminum alloy plate. The method provided by the invention can be used for overcoming the problem that semicontinuous casting and hot rolling requiring conventional production process is complex in process and high in production cost, and provides a novel path for industrial production of the 4343 aluminum alloy.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, and in particular relates to a casting and rolling production method of 4343 aluminum alloy plates. Background technique [0002] Aluminum alloys are mainly used as casting or die-casting aluminum alloys. They are often used in the production of auto parts and are directly produced by casting or die-casting methods. At the same time, aluminum alloys are also used in automobiles in the form of plates, such as water tank belts and aluminum alloy lead solders. 4343 / 3003 aluminum alloy composite material, in which the 4343 aluminum alloy used is produced by semi-continuous casting, then annealed, washed, hot-rolled to a certain thickness, and then hot-rolled and composited with 3003 aluminum alloy billet. This kind of production process is long, the compound yield is low, and the production cost is high. Therefore, it is urgent to find a casting and rolling technology suitable for aluminum a...

AI Technical Summary

Problems solved by technology

This kind of production process is long, the composite yield is low, and the production cost is high. Therefore, it is urgent to find a casting and rolling technology suitable for aluminum alloys represented by 4343

[0003] According to relevant information at home and abroad, the casting and rolling production technology of aluminum alloys is only used in the production of 1000 series, 3000 series, 8000 series and very few other series of aluminum alloys. Casting and rolling technology and production reports, the main reason is that aluminum alloy contains high silicon, and sheet-shaped eutectic silicon will appear when casting and rolling technology is used. This shape of silicon phase makes the cast-rolled plate itself very brittle. There are serious cracks on the edge, and in the subsequent rolling deformation, cracks will occur even under hot rolling conditions, and even the entire plate surface will be crushed, and the rolling deformation of the aluminum alloy plate cannot be realized

In addition, aluminum alloys represented by 4343 have a relatively large temperature range in the two-phase zone, and the temperature range in the two-phase zone of aluminum alloys such as 1000 series, 3000 series and 8000 series that can be normally produced at present is not greater than 20 ° C, which is The temperature range of the two-phase region increases the difficulty of casting and rolling technology. When the pouring temperature of casting and rolling is high, it has better flow performance and is prone to soaking phenomenon, while the lower pouring temperature will cause jamming phenomenon, making it difficult to stand. very big