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A method of manufacturing 6082t6 aluminum alloy large-scale rods for power equipment

A technology for power equipment and a manufacturing method, applied in the field of aluminum alloy materials for power equipment, can solve the problems of high content of strengthening elements, high requirements for solid solution strengthening environment, and decreased corrosion resistance, etc., and achieves good process performance and no stress. The effect of corrosion cracking tendency and production efficiency improvement

Active Publication Date: 2016-03-16
SHANDONG YUHANG SPECIAL ALLOY EQUIP
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the fact that 6082 aluminum alloy is one of the alloys with the most complex composition among the six-series aluminum alloys, during the high-temperature heating process, the solid solubility of Mg and Si increases significantly as the main strengthening elements increase with the heating temperature, and the alloy has obvious quenching aging strengthening effect. The strength of the 6082 alloy is greatly increased; however, the content of the main strengthening elements is high and the alloying elements are more, so the quenching temperature range is narrow, and the requirements for the solid solution strengthening environment are high. It must be quenched within 30 seconds to achieve the solid solution strengthening effect. When a small amount of Cu is added to the alloy, the strength is further increased, but the sensitivity to quenching is increased, especially for rods with a diameter greater than 150mm. When the online quenching time is longer, the strength is significantly reduced and the corrosion resistance is reduced. Therefore, this type of alloy Suitable for off-line quenching
In view of the material characteristics of 6082T6 aluminum alloy, the preparation method for the large-scale aluminum alloy bar of 6082T6 is not suitable for the current method. Therefore, there is an urgent need for a manufacturing method for the large-scale aluminum alloy bar of 6082T6 for power equipment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] a. The cast aluminum alloy is a six-series aluminum alloy round ingot, and the mass percentage of the elements in the aluminum alloy ingot used

[0027] Si is 1.0%~1.05%, Fe is ≤0.12%, Cu is ≤0.10%, Mn is 0.55%~0.65%, Mg is 0.9%~0.95%, Cr is ≤0.10%, Zn is ≤0.10%, and Ti is ≤0.05%, single impurity ≤0.05%, total impurity ≤0.15%, and the rest is Al; the ingot specification is Φ520mm×4000mm, and the calculation of ingredients when smelting six-series aluminum alloy round ingots is based on the center line of step a to ensure that the casting The ingot composition is controlled within the standard range; slag removal once after melting, once after refining in the smelting furnace, once after refining in the holding furnace; degassing once after refining in the melting furnace, once degassing after refining in the holding furnace, and refining in the holding furnace Then perform a degasser degassing.

[0028] b. Cut the six-series aluminum alloy round ingot wagon with a spec...

Embodiment 2

[0033] The difference between this embodiment and Example 1 is that the No. 6 aluminum alloy round ingot used in step a has a refining degree reaching the first-level oxide film requirement, no metal compound segregation, and the Mg:Si ratio in the chemical composition does not follow 1.73: The traditional ratio of 1 makes Si surplus, and the smaller the alloy composition of Fe, Zn, and Ti, the better. In order to improve the purity of 6082 alloy and improve the electrical conductivity; add Cu element and control it at the upper line of the standard to significantly improve the mechanical properties. It can neutralize the adverse effect of Ti on the electrical conductivity; control the Mn element on the upper line, Mn not only participates in solid solution strengthening, but also eliminates the adverse effects of Fe and can refine the grain, Si is 1.03%, Fe is 0.10%, Cu 0.09%, Mn 0.63%, Mg 0.93%, Cr 0.08%, Zn 0.09%, Ti 0.045%, single impurity ≤ 0.05%, total impurity ≤ 0.15%, the...

Embodiment 3

[0035] The difference between this embodiment and Example 1 is that the wool material is homogeneous, the heating temperature is 560°C, and the temperature is kept for more than 9 hours. The cooling method is: air cooling to 200°C and water cooling to room temperature. The primary oxide film requirements, other steps and parameters are the same as in Example 1.

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Abstract

The invention belongs to the technical field of aluminum alloy materials for electric power equipment and particularly relates to a method for manufacturing large-sized aluminum alloy bars with high strength and high electrical conductivity. The large-sized 6082 bars with high strength and high electrical conductivity, especially 6082T6 aluminum alloy bars with diameter from 150mm above to 300mm, are utilized for processing large-sized electrical elements with high strength and high electrical conductivity in the electric power equipment. An aluminum alloy ingot used in the method contains the following elements in percentage by mass: 1.0%-1.05% of Si, no more than 0.12% of Fe, no more than 0.10% of Cu, 0.55%-0.65% of Mn, 0.9%-0.95% of Mg, no more than 0.10% of Cr, no more than 0.10% of Zn, no more than 0.05% of Ti, no more than 0.05% of isolated impurity, no more than 0.15% of total impurities, and the balance being Al. According to the method, mass production and delivery can be achieved, the strength and the electrical conductivity of the large-sized aluminum alloy bars are enhanced, and processing and use are facilitated; the mechanical property and the electrical conductivity of the large-sized aluminum alloy bars obtained by the method are stable; in repeated operation, the bars can satisfy the Chinese standard of bars with diameter smaller than 150mm, the Chinese standard of bars with diameter from 150mm above to 300 mm can be supplemented or perfected and each performance index can be introduced into the Chinese standard.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy materials for power equipment, and in particular relates to a method for manufacturing large-size aluminum alloy rods with high strength and high conductivity. The components, specifically, are 6082T6 aluminum alloy rods larger than 150 mm to 300 mm rods. 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. The demand for large electrical components with high strength and high conductivity in power equipment is very extensive. For blanking materials, high strength and high conductivity aluminum The demand for large-size alloy rods is increasing. High-strength and high-conductivity large-scale electrical components require high-strength and high-conductivity aluminum alloy large-size rods, which must have high strength, good plasticity, high spe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C37/04C22F1/043C22C21/02B21C23/02
Inventor 王明星张建忠许辉宋微秦向同苏本显
Owner SHANDONG YUHANG SPECIAL ALLOY EQUIP
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