Manufacturing method of 6063T6 aluminum alloy large-scale bar for power equipment

Abstract

The invention belongs to the technical field of aluminum alloy materials for power equipment, and particularly relates to a manufacturing method of a high-strength high-conductivity aluminum alloy large-scale bar. A 6063 high-strength high-conductivity large-specification bar is used for processing a high-strength high-conductivity large electric element in power equipment, particularly a 6063T6 aluminum alloy bar with a diameter over 150-300mm. A sixth-system round aluminum alloy ingot is adopted and contains the following elements in percentage by mass: 0.40-0.44% of Si, less than or equal to 0.13% of Fe, less than or equal to 0.1% of Cu, less than or equal to 0.10% of Mn, 0.55-0.60% of Mg, less than or equal to 0.05% of Zn, less than or equal to 0.05% of Ti, less than or equal to 0.10% of Cr, less than or equal to 0.05% of single impurity, less than or equal to 0.15% of all impurities and the balance of Al. The problems in production and delivery can be effectively solved, the strength and conductivity of the large-specification aluminum alloy bar are improved, and the processing and application are facilitated; by adopting the method, the mechanical properties and conductivity are stable; and through repeated reproduction operations, the national standard for a diameter below 150mm can be met, the national standard for bars with diameters over 150-300mm can be supplemented or completed, and all performance indexes are introduced into the national standard.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy materials for electric power equipment, and in particular relates to a method for manufacturing a large-size high-strength high-conductivity aluminum alloy rod, which utilizes 6063 high-strength, high-conductivity large-size rods to process high-strength, high-conductivity large-scale electrical components in power equipment, Specifically, it is a 6063T6 aluminum alloy bar with a diameter greater than 150 mm to 300 mm. Background technique [0002] With the rapid development of the world's machinery manufacturing technology, new technologies, new materials, new processes, and new products emerge in an endless stream. High-strength, high-conductivity aluminum alloy large-size rods are used as billet materials for large-scale electrical components with high strength and high conductivity. The demand for high-strength and high-conductivity large-scale electrical components requires high-streng...

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Problems solved by technology

[0003] In view of the fact that the 6063T6 aluminum alloy has few main strengthening elements, the alloy is simple, and it is difficult to increase the strength, but in the process of high-temperature heating, the solid solubility of the main strengthening elements increases significantly with the increase of temperature. The alloy has obvious quenching aging strengthening effect, and the quenching range is wide. For online quenching, when a small amount of Cu is added to the alloy, the strength of the 6063 alloy is close to that of duralumin, and the strength increases greatly. When other impurity elements are controlled, the conductivity is improved, but the sensitivity to quenching is increased, especially if the diameter is larger than For 150mm bars, when the online quenching time is long, the corrosion resistance will decrease. The preparation method for large-size bars of 6063T6 aluminum alloy is not suitable for the current method. Therefore, there is an urgent need for a large-size bar of 6063T6 aluminum alloy for power equipment. material manufacturing method