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Preparation method of high-strength stress-corrosion-resistant aluminum alloy profile

A technology of stress corrosion resistance and aluminum alloy profiles, which is applied in the field of metal material processing, can solve the problems of low strength and poor intergranular corrosion resistance of aluminum alloys, etc., to improve the microstructure, increase the strength of aged alloys, and promote the formation of fine grains Effect

Active Publication Date: 2021-07-20
JIANGSU UNIV OF TECH
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  • Claims
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Problems solved by technology

[0004] In order to solve the technical problems of poor intergranular corrosion resistance and low strength of aluminum alloys, a method for preparing aluminum alloy profiles with high strength and stress corrosion resistance is provided.

Method used

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  • Preparation method of high-strength stress-corrosion-resistant aluminum alloy profile
  • Preparation method of high-strength stress-corrosion-resistant aluminum alloy profile
  • Preparation method of high-strength stress-corrosion-resistant aluminum alloy profile

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Embodiment 1

[0030] A method for preparing a high-strength stress-corrosion-resistant aluminum alloy profile, comprising the steps of:

[0031] (1) Ingredients and smelting: select raw materials to remelt refined aluminum ingots, pure magnesium ingots, cathode copper, zinc ingots, aluminum-silicon master alloys, aluminum-manganese master alloys, aluminum-titanium master alloys, Al-10% Y alloys, Al-5 %Sc alloy and Al-10%Sr alloy, according to the weight percentage of the following elements Mg: 0.9% ~ 1.05%, Si: 0.45% ~ 0.65%, Cu: 0.15% ~ 0.30%, Y: 0.10% ~ 0.20%, Sc : 0.05%~0.15%, Sr: 0.09%~0.15%, Cr≤0.10%, Zn≤0.10%, Fe≤0.12%, Mn≤0.10%, Ti≤0.10%, total amount of impurity elements≤0.15%, balance For Al, weigh raw materials for batching;

[0032] Add the above raw materials: remelted refined aluminum ingots, copper cathodes, zinc ingots, aluminum-silicon master alloys, aluminum-manganese master alloys, aluminum-titanium master alloys, and aluminum-titanium-boron grain refiners into a dry inte...

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Abstract

The invention relates to a preparation method of a high-strength stress-corrosion-resistant aluminum alloy profile. The preparation method comprises the following steps that a remelted refined aluminum ingot, cathode copper, a zinc ingot, a magnesium ingot, an aluminum-silicon intermediate alloy, an aluminum-manganese intermediate alloy, an aluminum-titanium intermediate alloy, an Al-10% Y intermediate alloy, an Al-5% Sc intermediate alloy and an Al-10% Sr intermediate alloy are smelted; then homogenization treatment is carried out, skin turning and saw cutting are carried out after cooling, and then heating treatment, extrusion forming treatment, solid solution quenching treatment, first-time stretching treatment, first-stage aging treatment, second-time stretching treatment, second-stage aging treatment and cooling are carried out to obtain the high-strength stress-corrosion-resistant aluminum alloy profile; and the speed of the second-time stretching treatment is slower than that of the first-time stretching treatment. The aluminum alloy profile treated by the method has the effects of improving the strength, plasticity and stress corrosion resistance, and the obtained aluminum alloy profile is high in surface quality and uniform and fine in structure.

Description

technical field [0001] The invention relates to the technical field of metal material processing, in particular to a method for preparing a high-strength stress-corrosion-resistant aluminum alloy profile. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal structural material in modern industrial technology, and is widely used in aerospace, transportation, machinery manufacturing, modern architecture and textile industry. Al-Mg-Si series aluminum alloys have the advantages of good processing performance and welding performance, good thermoplasticity, good corrosion resistance, high toughness, not easy to deform after processing, compact and defect-free materials, etc., represented by 6061 and 6082 aluminum alloys Industrial profiles are very versatile. However, under certain working conditions, this series of aluminum alloy profiles has disadvantages such as low strength and modulus, poor stress corrosion resistance, etc., and cannot meet ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C21/08C22F1/047B21C23/14
CPCC22C1/026C22C1/03C22C21/08C22F1/002C22F1/047B21C23/142
Inventor 王健周佳浩徐文婷卢雅琳周东帅杨晓红
Owner JIANGSU UNIV OF TECH
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