Er-containing high-strength anti-corrosion Al-Zn-Mg aluminum alloy and preparation method

An aluminum alloy, corrosion-resistant technology, applied in the field of non-ferrous metal materials, can solve the problems of high price, hindering the migration and restriction of dislocations and grain boundaries, etc.

Inactive Publication Date: 2020-04-10
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The addition of trace elements can modify the aluminum alloy. The commonly used microalloy elements include Mn, Ti, Sc, Zr, Ag, etc. These trace elements can produce dispersed particles during homogenization annealing in the as-cast state. It hinders

Method used

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  • Er-containing high-strength anti-corrosion Al-Zn-Mg aluminum alloy and preparation method
  • Er-containing high-strength anti-corrosion Al-Zn-Mg aluminum alloy and preparation method
  • Er-containing high-strength anti-corrosion Al-Zn-Mg aluminum alloy and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0020] An Al-Zn-Mg series alloy containing Er, the alloy composition mass percentage is: Zn: 4.03%, Mg: 2.09%, Cu: 0.35%, Er: 0.15%, Zr: 0.18%, and the balance is Al.

[0021] Melting and casting in a resistance furnace, skimming and stirring, pouring into a mold; putting the ingot into an annealing furnace for homogenization annealing, the process is 280°C / 10h+470°C / 20h, the high temperature properties of the alloy after homogenization are shown in Table 1 , followed by hot rolling, the reduction is 90%, and the hot rolling temperature is 500°C.

[0022] Then the solid solution process is 470°C / 1h, water quenching; then the aging process is 90°C / 12h, and its mechanical properties and corrosion resistance are shown in Table 2.

Embodiment 2

[0024] The process from casting to hot rolling is the same as in Example 1, then the solution process is 470°C / 1h, water quenching; and the aging process is 90°C / 12h+130°C / 12h. The mechanical properties and corrosion resistance are shown in Table 2.

Embodiment 3

[0026] The process from casting to hot rolling is the same as in Example 1, then the solution process is 470°C / 1h, water quenching; and the aging process is 90°C / 12h+130°C / 48h. The mechanical properties and corrosion resistance are shown in Table 2.

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Abstract

The invention relates to the field of aluminum alloy, and discloses an Er-containing high-strength anti-corrosion Al-Zn-Mg aluminum alloy and a preparation method. The Er-containing high-strength anti-corrosion Al-Zn-Mg aluminum alloy contains, by mass, 3.5-5.5% of Zn, 1.5-3.0% of Mg, 0.2-0.6% of Cu, 0.2-0.6% of Mn, 0.01-0.25% of Er, 0.01-0.25% of Zr and the balance Al and unavoidable impurities.The invention further discloses a preparation process and thermal treatment process for the Er-containing high-strength anti-corrosion Al-Zn-Mg alloy. The processes comprise the steps of fusion casting, homogenization, thermal deformation, solution hardening treatment and aging treatment. The Er-containing high-strength anti-corrosion Al-Zn-Mg aluminum alloy is excellent in room-temperature tensile property, high-temperature tensile property and resistance to exfoliation corrosion, the requirements for industrial application in the transportation field are met, and the preparation method is suitable for production and manufacturing.

Description

technical field [0001] The invention relates to an Er-containing high-strength and corrosion-resistant Al-Zn-Mg series aluminum alloy, which can be used in the fields of aerospace and transportation, and belongs to the field of non-ferrous metal materials. Background technique [0002] With the development of aerospace and transportation fields, the performance requirements of materials are constantly improving. In order to meet the needs of lightweight carriers, energy saving and emission reduction, materials with low density, high strength, good formability and excellent corrosion resistance have become the pursuit direction. As a heat-treatable aluminum alloy, Al-Zn-Mg aluminum alloys can obtain component materials with excellent comprehensive properties through appropriate heat treatment processes. [0003] Al-Zn-Mg-(Cu) alloys widely used at present include medium-strength aluminum alloys represented by 7003, 7005, and 7N01, but with excellent processability. Their yie...

Claims

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Application Information

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IPC IPC(8): C22C21/10C22C1/03C22F1/053
CPCC22C1/03C22C21/10C22F1/002C22F1/053
Inventor 黄晖陈炯燊魏午贾延琳文胜平高坤元吴晓蓝聂祚仁
Owner BEIJING UNIV OF TECH
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