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A high-performance, high-exfoliation corrosion-resistant aluminum alloy profile and its processing technology

An aluminum alloy profile, exfoliation corrosion technology, applied in the field of aluminum alloy hot extrusion, can solve the problems of 7055 alloy exfoliation corrosion, affecting performance and service life, large plastic deformation resistance, etc., to optimize extrusion process parameters, high resistance to spalling, etc. The effect of corrosion and grain refinement

Active Publication Date: 2020-06-16
SHANDONG NANSHAN ALUMINUM +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the high plastic deformation resistance of 7055 aluminum alloy in the extrusion process, the material is difficult to form. At present, domestic enterprises are in the research and development stage, and mature extrusion processing technology has not yet been formed. Moreover, 7055 alloy is susceptible to exfoliation corrosion, which seriously affects its performance and service life.

Method used

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  • A high-performance, high-exfoliation corrosion-resistant aluminum alloy profile and its processing technology
  • A high-performance, high-exfoliation corrosion-resistant aluminum alloy profile and its processing technology

Examples

Experimental program
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Effect test

Embodiment 1

[0023] This embodiment provides a high-performance, high-exfoliation corrosion-resistant aluminum alloy profile, which is mainly produced through the following processing techniques:

[0024] The content of each component of the raw materials for preparing high-performance, high-exfoliation corrosion-resistant aluminum alloy profiles is: Si0.06%, Fe0.08%, Cu2.27%, Mn0.06%, Mg2.04%, Cr0.02%, Zn8 .16%, Ti0.05%, Zr0.16%, rare earth La0.24%, and the balance is Al.

[0025] The raw materials are mixed and cast, and then the melted and cast ingots are subjected to multi-stage homogenization treatment. Specifically, the ingot was soaked at 260° C. for 4 hours, heated to 465° C. for 22 hours, and then heated to 475° C. for 2 hours.

[0026] After the homogenization treatment, the obtained aluminum alloy ingot is sent to an 11MN reverse extruder for extrusion. The extrusion breakthrough pressure is about 8.5MN. The heating temperature of the pressing cylinder is 425°C, the heating te...

Embodiment 2

[0030] This embodiment provides a high-performance, high-exfoliation corrosion-resistant aluminum alloy profile, which is mainly produced through the following processing techniques:

[0031] The content of each component of the raw materials for preparing high-performance, high-exfoliation corrosion-resistant aluminum alloy profiles is: Si0.08%, Fe0.08%, Cu2.24%, Mn0.06%, Mg2.16%, Cr0.02%, Zn8 .12%, Ti0.05%, Zr0.19%, rare earth La0.23%, and the balance is Al.

[0032] The raw materials are mixed and cast, and then the melted and cast ingots are subjected to multi-stage homogenization treatment. Specifically, the ingot was soaked at 262° C. for 3 hours, heated to 468° C. for 20 hours, and then heated to 473° C. for 2 hours.

[0033] After the homogenization treatment, the obtained aluminum alloy ingot is sent to an 11MN reverse extruder for extrusion. The extrusion breakthrough pressure is about 8.5MN. The heating temperature of the pressing cylinder is 432°C, the heating te...

Embodiment 3

[0037] This embodiment provides a high-performance, high-exfoliation corrosion-resistant aluminum alloy profile, which is mainly produced through the following processing techniques:

[0038] The content of each component of the raw materials for preparing high-performance, high-exfoliation corrosion-resistant aluminum alloy profiles is: Si0.08%, Fe0.08%, Cu2.30%, Mn0.06%, Mg2.06%, Cr0.02%, Zn8 .17%, Ti0.05%, Zr0.13%, rare earth La 0.22%, and the balance is Al.

[0039] The raw materials are mixed and cast, and then the melted and cast ingots are subjected to multi-stage homogenization treatment. Specifically, the ingot was soaked at 261° C. for 2 hours, heated to 469° C. for 24 hours, and then heated to 470° C. for 2 hours.

[0040] After the homogenization treatment, the obtained aluminum alloy ingot is sent to an 11MN reverse extruder for extrusion. The extrusion breakthrough pressure is about 8.5MN. The heating temperature of the pressing cylinder is 424°C, the heating t...

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Abstract

The invention provides a high-performance and high exfoliation corrosion resistance type aluminum alloy section and a processing technology thereof, and relates to the technical field of hot extrudingof aluminum alloys. The processing technology of the high-performance and high exfoliation corrosion resistance type aluminum alloy section comprises the step of thermally processing a melted and casted cast ingot, wherein the cast ingot comprises the following components in percentage by weight: 0.05-0.1% of Si, 0.05-0.1% of Fe, 2.20-2.30% of Cu, 0.05-0.1% of Mn, 2.0-2.1% of Mg, 0.01-0.03% of Cr, 8.1-8.2% of Zn, 0.01-0.1% of Ti, 0.12-0.2% of Zr, 0.20-0.30% of rare earth La, and the balance Al. According to the processing technology, the components are reasonably prepared; a melt is purified,so that the inclusion and hydrogen content in the aluminum alloy manufacturing process can be decreased; and moreover, crystal grains can be refined; the aluminum alloy section manufactured by thermal processing is high in intensity, high in ductility and toughness, and high in exfoliation corrosion resistance.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy hot extrusion, and in particular to a high-performance, high-stripping corrosion-resistant aluminum alloy profile and its processing technology. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal structural material in industry, and has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry. With the rapid development of industrial economy, the demand for welded structural parts of aluminum alloy is increasing day by day, so that the research on weldability of aluminum alloy is also in-depth. [0003] 7055 aluminum alloy has comprehensive properties such as high strength, good corrosion resistance and high toughness, and is used to prepare key load-bearing components such as upper wing skins and keel beams of military transport aircraft and large passenger aircraft. Due to the high plastic deforma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/10C22C1/03C22F1/053
CPCC22C1/026C22C1/03C22C21/10C22F1/002C22F1/053
Inventor 程仁策张涵源程仁寨张洪辉肖栋赵海滨郑卓阳张启东隋信增赵巍曲信磊史春丽李铸铁姜林
Owner SHANDONG NANSHAN ALUMINUM
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