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A 7055 aluminum alloy flat row and its production process and application

A production process and technology for aluminum alloys, applied in the field of aluminum alloys, can solve the problems of poor compression performance and large product weight, and achieve the effect of high fracture toughness value

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

AI Technical Summary

Problems solved by technology

At present, 7055-T6511 flat row products are generally used to manufacture aviation seat structural parts. The compression performance of this product is relatively poor, resulting in a relatively large weight of the product.

Method used

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  • A 7055 aluminum alloy flat row and its production process and application
  • A 7055 aluminum alloy flat row and its production process and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This embodiment provides a 7055-T76511 flat row, which is prepared by the following preparation method:

[0045] Prepare raw materials according to the weight fraction composition of alloy elements of 7055 aluminum alloy: Si: 0.02%, Fe: 0.04%, Cu: 2.12%, Mg: 2.03%, Mn: 0.004%, Cr: 0.006%, Zn: 7.98%, Ti: 0.04%, Zr: 0.1%, and the balance is Al. Pour pure electrolytic aluminum liquid into a pouring melting furnace, add other alloy element components, and then smelt to obtain an aluminum alloy melt with uniform composition. The alloy melt is cooled and cast into cast rods.

[0046] Put the cast rod into the homogenization furnace for two-stage homogenization treatment. The first-stage homogenization treatment is to keep warm at 460°C for 30 hours, and the second-stage homogenization treatment is to keep warm at 475°C for 8 hours; The heating rate during chemical treatment was 40°C / min.

[0047] Put the homogenized cast rod into the extrusion barrel of a 150MN extruder for...

Embodiment 2

[0053] This embodiment provides a 7055-T76511 flat row, which is prepared by the following preparation method:

[0054] Raw materials are prepared according to the weight fraction composition of alloy elements of 7055 aluminum alloy: Si: 0.04%, Fe: 0.05%, Cu: 2.22%, Mg: 2.1%, Mn: 0.03%, Cr: 0.01%, Zn: 8.02, Ti: 0.03 %, Zr: ≤0.05%, the balance is Al, pour the pure electrolytic aluminum liquid into the pouring melting furnace, add other alloy element components, and then smelt to obtain an aluminum alloy melt with uniform composition, and then pour the aluminum The alloy melt is cooled and cast into cast rods.

[0055] Put the cast rod into the homogenization furnace for two-stage homogenization treatment. The first-stage homogenization treatment is to keep warm at 455°C for 32h, and the second-stage homogenization treatment is to keep warm at 470°C for 8.5h. The temperature increase rate during the homogenization treatment was 38° C. / min.

[0056] Put the homogenized cast rod...

Embodiment 3

[0062] This embodiment provides a 7055-T76511 flat row, which is prepared by the following preparation method:

[0063] Raw materials are prepared according to the weight fraction composition of alloy elements of 7055 aluminum alloy: Si: 0.01%, Fe: 0.03%, Cu: 2.08%, Mg: 1.98%, Mn: 0.005%, Cr: 0.005%, Zn: 7.76%, Ti: 0.04%, Zr: 0.09%, and the balance is Al. Pour pure electrolytic aluminum liquid into a pouring melting furnace, add other alloy element components, and then smelt to obtain an aluminum alloy melt with uniform composition. The alloy melt is cooled and cast into cast rods.

[0064] Put the cast rod into the homogenization furnace for two-stage homogenization treatment. The first-stage homogenization treatment is to keep warm at 460°C for 30h, and the second-stage homogenization treatment is to keep warm at 470°C for 7.5h. The temperature increase rate during the homogenization treatment was 42° C. / min.

[0065] Put the homogenized cast rod into the extrusion barrel ...

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Abstract

The invention provides a 7055 aluminum alloy flat bar and a production technology and application thereof and relates to the field of aluminum alloys. According to the production technology of the 7055 aluminum alloy flat bar, raw materials are prepared according to alloy element compositions of a 7055 aluminum alloy, and the raw materials are smelted and cast into cast rods; a double-stage homogenization system is adopted for carrying out homogenization treatment on the cast rods; the cast rods obtained after the homogenization treatment are subjected to extrusion treatment, and a product isobtained; the product is prestretched; a double-stage solid solution system is adopted for carrying out solid solution heat treatment on the prestretched product; the product is stretched and straightened within 6 hours after the solid solution heat treatment; a double-stage aging system is adopted for carrying out manual aging heat treatment on the product, and the production flow and technological parameters of the production technology of the 7055 aluminum alloy flat bar are standardized. The mechanical property, the electricity conductivity and the exfoliation corrosion performance of themade 7055 aluminum alloy flat bar meet the requirement of the AMS4336 standards, and the higher breaking tenacity value is obtained. The 7055 aluminum alloy flat bar is mainly applied to manufacturingof aero seat members.

Description

technical field [0001] The invention relates to the field of aluminum alloys, and in particular to a 7055 aluminum alloy flat row and its production process and application. Background technique [0002] 7055 aluminum alloy belongs to the Al-Zn-Mg-Cu series heat-treatable and strengthened multi-element aging alloy. It has the advantages of high strength, low density and good thermal processing performance. It is one of the main structural materials in the aerospace field and is suitable for manufacturing aircraft masks Skins, spars, bulkheads, landing gear components, and hydraulic system components, etc., are also used in other high-stress structural components that require high strength and good corrosion resistance. The alloy element composition of 7055 aluminum alloy includes: 0wt%-0.40wt% Si, 0wt%-0.50wt% Fe, 1.2wt%-2.0wt% Cu, 2.1wt%-2.9wt% Mg, 5.1wt% - 6.1 wt% Zn, 0 wt% - 0.30 wt% Mn, 0 wt% - 0.20 wt% Ti, 0.18 wt% - 0.28 wt% Cr; balance Al. [0003] At present, the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22F1/053C22C21/10
CPCC22C1/026C22C21/10C22F1/053
Inventor 程仁策姜海涛杨亚平高盼盼张启东隋信增李铸铁
Owner SHANDONG NANSHAN ALUMINUM
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