Casting method of aluminum alloy cast rod

Abstract

The invention provides a casting method of an aluminum alloy cast rod. Chemical composition elements of the aluminum alloy cast rod and the structure of a crystallizer are optimized so that when the aluminum alloy cast rod is cast, a temperature adjusting device, the stirring speed and the stirring time can be more accurately controlled through a controller, formability of aluminum alloy melt is guaranteed, meanwhile, uniformity of the internal temperature of the aluminum alloy melt can be guaranteed, the situation that an aluminum alloy dendritic crystal arm is broken into dendritic crystal fragments is effectively reduced, nucleation positions are added, more non-uniform nucleation occurs, the grain refining effect is remarkably generated, then the tendency that cracks are generated on the cast rod is reduced, the casting smelting quality is improved, and the yield is increased. The problems that when a large-size and large-diameter aluminum alloy cast rod is cast, the temperature of aluminum alloy melt is not uniform due to the high casting temperature, consequently, the cooling speeds and the cooling degrees of all parts of the cast rod are different, the cracking tendency exists, and cracks are generated in the cast rod are effectively solved.

Description

technical field [0001] The invention relates to the field of metal smelting, in particular to a method for casting aluminum alloy cast rods. Background technique [0002] When casting large-diameter or some special aluminum alloy casting rods, due to the slow casting speed and high casting temperature required in the process, the molten aluminum usually stays in the launder and mold for a long time. This will easily cause the temperature of the aluminum alloy melt in the crystallizer to be uneven, resulting in different cooling speeds and degrees of cooling in various parts of the cast rod, resulting in a tendency to crack, and eventually cracks will occur inside the cast rod. Moreover, if the aluminum liquid stays for too long, it will also lead to grain growth, resulting in structural defects such as coarse grains, which will affect the overall performance of subsequent products. The common method in the prior art is to improve some process parameters such as casting spee...

AI Technical Summary

Problems solved by technology

[0004] Based on this, in order to solve the problem that the high casting temperature makes the aluminum alloy melt temperature uneven when casting large-diameter aluminum alloy casting rods, resulting in different cooling speeds and cooling degrees at various parts of the casting rod, resulting in the tendency of cracks, and the occurrence of cracks inside the casting rod. Problem, the present invention provides a kind of casting method of aluminum alloy casting bar, and specific technical scheme is as follows:

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