Preparation method of ultrahigh-strength 7-series aluminum sheet

An ultra-high-strength, thin-plate technology, which is applied in the direction of improving process efficiency, can solve problems not involved in the processing method of cold-rolled thin strips, and achieve the effects of ensuring strength, reducing residual stress, and improving the tendency of edge cracking

Active Publication Date: 2022-05-31
CHINALCO RUIMIN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Patent application number 202010013070.6 discloses an ultra-high-strength aluminum alloy and its preparation method. On the basis of Al-Zn-Cu-Mg system, Zr, Ti and Y elements are added, and solution aging treatment is carried out after hot extrusion processing, with high strength At 900MPa, the maximum elongation after breaking is 5.6%, but it does not involve the processing method of cold rolling to produce thin strip

Method used

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  • Preparation method of ultrahigh-strength 7-series aluminum sheet
  • Preparation method of ultrahigh-strength 7-series aluminum sheet
  • Preparation method of ultrahigh-strength 7-series aluminum sheet

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Embodiment 1

[0042]A method for preparing an ultra-high-strength 7-series aluminum sheet, wherein the chemical composition of the aluminum alloy sheet and strip is calculated by mass fraction: Si0.06%, Fe0.23%, Cu1.1%, Mn 0.40%, Mg 2.0%, Zn6.5%, Ti 0.03%, the balance is aluminum and inevitable impurities.

[0043] The aluminum ingots, intermediate alloy ingots and electrolytic aluminum water raw materials are subjected to semi-continuous casting, homogenization heat treatment, sawing, milling, heating, hot rolling, cold rolling, solution quenching, and artificial aging. Strength 7 series aluminum sheet; the specific steps are as follows:

[0044] (1) According to the alloy composition ratio, semi-continuously cast aluminum ingots, aluminum intermediate alloy ingots and electrolytic aluminum water raw materials into aluminum alloy flat ingots after melting, refining, slag removal, and degassing;

[0045] (2) The semi-continuous ingot is subjected to a homogenization heat treatment at 440°C...

Embodiment 2

[0054] A method for preparing an ultra-high-strength 7-series aluminum sheet, wherein the chemical composition of the aluminum alloy sheet and strip is calculated by mass fraction: Si0.08%, Fe0.10%, Cu0.70%, Mn 0.59%, Mg 1.75%, Zn5.6%, Ti 0.015%, the balance is aluminum and inevitable impurities.

[0055] The aluminum ingots, intermediate alloy ingots and electrolytic aluminum water raw materials are subjected to semi-continuous casting, homogenization heat treatment, sawing, milling, heating, hot rolling, cold rolling, solution quenching, and artificial aging. Strength 7 series aluminum sheet; the specific steps are as follows:

[0056] (1) According to the alloy composition ratio, semi-continuously cast aluminum ingots, aluminum intermediate alloy ingots and electrolytic aluminum water raw materials into aluminum alloy flat ingots after melting, refining, slag removal, and degassing;

[0057] (2) The semi-continuous ingot is subjected to a homogenization heat treatment at 4...

Embodiment 3

[0066] A method for preparing an ultra-high-strength 7-series aluminum sheet, wherein the chemical composition of the aluminum alloy sheet and strip is calculated by mass fraction: Si0.18%, Fe0.30%, Cu0.80%, Mn 0.49%, Mg 1.90%, Zn6.8%, Ti 0.04%, the balance is aluminum and inevitable impurities.

[0067] The aluminum ingots, intermediate alloy ingots and electrolytic aluminum water raw materials are subjected to semi-continuous casting, homogenization heat treatment, sawing, milling, heating, hot rolling, cold rolling, solution quenching, and artificial aging. Strength 7 series aluminum sheet; the specific steps are as follows:

[0068] (1) According to the alloy composition ratio, semi-continuously cast aluminum ingots, aluminum intermediate alloy ingots and electrolytic aluminum water raw materials into aluminum alloy flat ingots after melting, refining, slag removal, and degassing;

[0069] (2) The semi-continuous ingot is subjected to a homogenization heat treatment at 46...

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Abstract

The invention discloses a preparation method of an ultrahigh-strength 7-series aluminum sheet. The ultrahigh-strength 7-series aluminum sheet comprises the following chemical components in percentage by mass: less than or equal to 0.20% of Si, less than or equal to 0.30% of Fe, 0.30-1.20% of Cu, 0.30-0.60% of Mn, 1.7-2.1% of Mg, 5.3-7.0% of Zn, 0.01-0.05% of Ti and the balance of aluminum and inevitable impurities, and the ultrahigh-strength 7-series aluminum sheet is prepared through semi-continuous casting, homogenizing heat treatment, surface milling, heating, hot rolling, cold rolling, solid solution quenching, artificial aging and the like. The thickness of the finished product ranges from 0.15 mm to 0.50 mm, the tensile strength is larger than or equal to 560 MPa, the yield strength is larger than or equal to 460 MPa, the ductility is larger than or equal to 10%, and the qualified product can be bent by 90 degrees (the radius R is smaller than or equal to 0.5 mm). The thin plate can be widely applied to backlight plates and structural parts of computers, mobile phones and display screens.

Description

technical field [0001] The invention belongs to the field of preparation of aluminum alloy strips, and in particular relates to a preparation method of a method for preparing an ultra-high-strength 7-series aluminum sheet. Background technique [0002] 7-series aluminum alloys are ultra-high-strength aluminum alloys with high specific strength, specific modulus, good electrical and thermal conductivity, and excellent cutting performance. They are widely used in aerospace, automotive, machinery manufacturing, shipbuilding, and chemical industries. and civil industry. [0003] Compared with stainless steel, aluminum alloy has the advantages of light weight, good heat dissipation, non-magnetic, easy recovery and recycling, especially with the development of the 3C electronics industry in the direction of thinning and lightweight. The 7-series aluminum alloy will gradually be popularized and applied in the backlight panels and structural parts of computers, mobile phones, and d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22C1/03C22C1/02C22F1/053
CPCC22C21/10C22C1/026C22C1/03C22F1/053C22F1/002Y02P10/20
Inventor 阙石生张希园蔡峰黄瑞银彭有新皮炜诺郑光清李健东袁玮奇郑宏智罗富鑫
Owner CHINALCO RUIMIN
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