Production method of high-performance special aluminum alloy profile

Abstract

The invention provides a production method of a high-performance special aluminum alloy profile and belongs to the technical field of aluminum alloy processing. The method comprises the following steps: step 1, furnace baking; step 2, burdening/feeding, wherein raw materials are fed into a furnace according to the proportion requirement; step 3, smelting, wherein solid raw materials are subjected to homogenization heat treatment; step 4, filtering, wherein the gas content in the melt is further reduced, and non-metallic inclusions and various harmful metal impurities are reduced; and step 5, casting. According to the method, furnace baking operation is carried out according to parameters such as preset time and speed before smelting, so that the temperature of a furnace body is uniformly and slowly increased, and cracking of a furnace lining due to rapid cooling and rapid heating is avoided. In the four stages, i.e., before/during smelting, during filtering and during casting, the production process of the aluminum alloy profile is optimized and the hydrogen content is reduced to be less than 0.1 cm<3>/100g by controlling parameters such as furnace baking time, smelting temperature, casting speed/temperature, cooling speed and the like, so that cast ingot grains are refined and the performance of the alloy profile is improved.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy processing technology, in particular to a production method of high-performance special aluminum alloy profiles. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal structural material in industry. With the rapid development of industrial economy, the demand for aluminum alloy welded structural parts is increasing, and higher requirements are put forward for aluminum alloy. Standard chemical composition and mechanical properties, etc., also need to ensure that the product will not have problems such as pores and shrinkage cavities. [0003] Smelting and casting production is an integral part of aluminum and aluminum alloy processing technology. Its main purpose is to prepare alloys to improve metal clarity through appropriate technological measures and cast them into shapes. It not only provides high-quality ingots that meet the processing requirements, b...

AI Technical Summary

Problems solved by technology

[0007] Although this technology has improved the performance of aluminum alloys to a certain extent, there are still some deficiencies.

First, the setting parameters of the oven before smelting are not involved, and it is impossible to reduce the possibility of metal gas absorption and oxidation in the subsequent smelting process at the initial stage; second, the temperature setting and filtering process during smelting are not perfect enough, and it is impossible to accurately reduce hydrogen during smelting content and other impurities; third, the casting process is not considered enough to make the ingot grains more refined

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