High-strength aluminum alloy slab and manufacturing method thereof

A manufacturing method and aluminum alloy technology, applied in the field of high-strength aluminum alloy thick plate and its manufacture, can solve the problems of shortened production process, uneven performance, poor plate shape, etc., and achieve the elimination of casting residual stress and dimensional stability Good, uniform thickness effect

Inactive Publication Date: 2015-03-04
广西南南铝加工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of the above problems of hot-rolled thick plates, the purpose of the present invention is to provide a high-strength aluminum alloy thick plate manufactured by a non-pressing processing method without rolling and its manufacturing method, which can shorten the production process and solve the problem of heat Problems of uneven structure, properties, bad shape and uneven thickness of rolled thick plates can improve yield, reduce product cost and increase economic benefits

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047]A high-strength 7XXX series aluminum alloy thick plate in this embodiment is made of the following alloy components in terms of mass percentage:

[0048] Si<0.18; Fe<0.35; Cu=1.30~1.75; Mn<0.20; Mg=2.40~2.80; Cr=0.20~0.25; Zn=5.5~5.9; Ti<0.05; Zr<0.04;

[0049] The balance is Al and unavoidable elements, each unavoidable element is less than 0.05 and the total is less than 0.15.

[0050] The present embodiment carries out according to the following steps:

[0051] (1) According to the mass percentage determined according to the implementation method, take aluminum ingots for remelting, cathode copper, pure magnesium ingots, pure zinc ingots, aluminum-chromium master alloys, aluminum-titanium master alloys, and aluminum-zirconium master alloys and add them to the melting furnace for melting (except aluminum-titanium master alloy), the melting temperature is 730-780°C, and electromagnetic stirring is carried out during the melting process; when the melt temperature reache...

Embodiment 2

[0061] The difference between this example and Example 1 is: in step (5), a thick plate with a specification of 400mm thick x 1400mm wide x 6000mm long is obtained by machining; step (6) heat the thick plate at 470±2.5°C in a vertical quenching furnace After the immersion solution quenching treatment, the thick plate is subjected to aging treatment under the condition of 120±2.5°C / 20~25h to obtain the finished thick plate.

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Abstract

The invention relates to a high-strength aluminum alloy slab and a manufacturing method thereof. The alloy mainly comprises the following components: less than 0.35% of Si, less than 0.45% of Fe, 1.25-1.95% of Cu, less than 0.30% of Mn, 2.25-2.85% of Mg, 0.19-0.27% of Cr, 5.2-6.0% of Zn, less than 0.2% of Ti, less than 0.04% of Zr and the balance of Al and unavoidable elements. The manufacturing method of the high-strength aluminum alloy slab is free of a rolling process and comprises the following flows: proportioning raw materials, smelting, casting a flat ingot, carrying out two-stage soaking, sawing the head and bottom of the flat ingot, carrying out fixed-length sawing and width-fixed sawing, sawing upper and lower surfaces of the flat ingot, sawing the flat ingot into the aluminum plate according to requirements, carrying out solid solution quenching, stretching and flattening and carrying out aging treatment. By the manufacturing method, the production process flows can be shortened, such problems of the slab manufactured by a hot rolling method as uneven microstructure and performance, poor flatness and uneven thickness are solved, the yield is increased, the cost of the product is decreased and the economic benefits are increased.

Description

technical field [0001] The invention relates to a processing method of an aluminum alloy plate, in particular to a high-strength aluminum alloy thick plate and a manufacturing method thereof. Background technique [0002] 7XXX series high-strength aluminum alloys have high comprehensive performance and are widely used in the fields of aviation, aerospace, transportation and mold manufacturing. At present, 7XXX series high-strength aluminum alloy thick plates are produced by hot rolling, and the typical process flow is: batching → melting → slab casting → slab homogenization treatment → sawing head and tail → slab milling → heating → hot rolling → solution quenching → stretching → aging → sawing. [0003] Chinese patent CN101037747A discloses an aluminum alloy pre-stretched sheet for aviation and its production method. The process flow is: batching→casting→soaking treatment→heating, hot rolling and shearing→quenching→straightening→pre-stretching→aging → Sawing. The sect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22C1/02C22F1/053
CPCC22C21/10C22C1/026C22F1/053
Inventor 沈海鸥郑玉林袁冰梅
Owner 广西南南铝加工有限公司
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