Method for producing 6063 aluminum alloy bar by rapid silicon dissolving method

Abstract

A method for producing 6063 aluminum alloy bars by a rapid silicon dissolving method comprises the following steps: smelting a solid cold charge; performing secondary batching on industrial silicon blocks; evenly spreading an aluminum slag separating agent to perform slag removal treatment; adjusting temperature of molten aluminum to 720 to 740 DEG C, turning off all fire lances, and with stirring, adding magnesium blocks and adding burning loss amount; adding a refining agent to perform refining treatment on the molten aluminum; performing micro adjustment on components; standing; and discharging water to pour the aluminum alloy bars, and meanwhile adding aluminum-titanium-boron wires. The actual yield of the 6063 aluminum alloy bars produced by the method disclosed by the invention reaches up to 97 percent; smelting time is greatly shortened; burning loss of the molten aluminum is relatively low; surface quality of the bars reaches the standard; an Mg2Si strengthening phase is evenly dispersed; tissue of each bar is uniform and is free of segregation; the mechanical property of each bar is increased in comparison with that of a bar produced by an intermediate alloy method; a time-consuming and labor-consuming intermediate alloy preparation process is omitted; the method disclosed by the invention has a simple and easy process, is stable in production level, low in time, labor and energy cost and low in environmental pollution, can be used for preparing high-quality 6063 aluminum alloy bars and can also be used for smelting other aluminum alloys of which the silicon content is lower than 1.2 percent.

Description

technical field [0001] The invention belongs to the field of metal material preparation and relates to a production method of an aluminum alloy profile. Background technique [0002] Aluminum alloy profiles are widely used in automobiles, ships, aviation and other fields. The main alloy elements of 6063 aluminum alloy are magnesium and silicon. It has excellent processing performance, excellent weldability, good corrosion resistance and toughness. It is a typical extrusion pressed alloy. The traditional preparation method of 6063 aluminum alloy is to add Al-Si master alloy ingot in the form of master alloy. Although the process is simple, the melting effect is good, and it is easy to alloy, but because of the additional process of making master alloy, the production cost will undoubtedly increase. and environmental costs, and increased energy consumption. [0003] Some manufacturers try to use pulverizers to crush industrial silicon ingots into silicon blocks of different ...

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Problems solved by technology

The traditional preparation method of 6063 aluminum alloy is to add Al-Si master alloy ingot in the form of master alloy. Although the process is simple, the melting effect is good, and it is easy to alloy, but because of the additional process of making master alloy, the production cost will undoubtedly increase. and environmental costs, and increased energy consumption

[0003] Some manufacturers try to use pulverizers to crush industrial silicon ingots into silicon blocks of different sizes, and then directly add silicon particles into the molten aluminum liquid according to the Si content requirements, and stir, the cost is relatively low, but the silicon particle content must be strictly controlled. Size, too large, it takes enough time to dissolve completely, too small, silicon particles are prone to oxidation reaction, and insoluble SiO is formed 2 Particles become fine inclusions, these inclusions will not only affect the mechanical properties of the product, but also shorten the life of the mold, the production process is harsh

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