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A high-strength corrosion-resistant rare earth aluminum alloy material and its preparation method

An aluminum alloy material and corrosion-resistant technology, applied in the fields of alloy materials and preparation, and corrosion-resistant materials, can solve problems such as affecting the use strength of alloys, and achieve the effects of improving stress corrosion resistance, good plastic toughness, and good fatigue performance.

Inactive Publication Date: 2018-03-16
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Al-Zn-Mg alloy is a heat treatment-strengthened high-strength aluminum alloy, which has high strength, large specific modulus, low density, and good corrosion resistance and thermal processing performance. However, the alloy has dynamic recrystallization during thermal processing and solid solution 1. There is recrystallization phenomenon in the alloy during aging treatment, which affects the service strength of the alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0076] Step 1: Mix 2Kg of industrial aluminum (99.7wt% purity), 0.4Kg of Al-Zn master alloy (50wt% Zn, 50wt% Al), and 0.017Kg of Al-Cu (30wt% Cu, 70wt% Al) Finally, put it into the hearth of the melting furnace, heat the furnace body to 760°C to fully melt the material, and then cool the aluminum alloy melt to 730°C, keep it warm for 10 minutes, and stop heating to obtain a primary alloyed aluminum alloy melt.

[0077] Step 2: 2Kg industrial aluminum (99.7wt% purity), 0.1KgAl-Ce master alloy (10wt%Ce, 90wt%Al), evenly mixed, put into the hearth of the smelting furnace, heat the furnace body to 860 ℃ to make the material fully After melting, the temperature of the aluminum alloy melt was lowered to 780° C., and after 10 minutes of heat preservation, the heating was stopped to obtain a secondary alloyed aluminum alloy melt.

[0078] Step 3: 4.81Kg industrial aluminum (99.7wt% purity), 0.5KgAl-Sc (2wt% Sc, 98wt% Al) master alloy, 0.07KgAl-Er (10wt% Er, 90wt% Al) master alloy are ...

Embodiment example 2

[0097] Step 1: Mix 2Kg of industrial aluminum (99.7wt% purity), 1.2Kg of Al-Zn master alloy (50wt% Zn, 50wt% Al), and 0.134Kg of Al-Cu (30wt% Cu, 70wt% Al) uniformly Finally, put it into the hearth of the melting furnace, heat the furnace body to 760°C to fully melt the material, and then cool the aluminum alloy melt to 730°C, keep it warm for 10 minutes, and stop heating to obtain a primary alloyed aluminum alloy melt.

[0098] Step 2: After uniformly mixing 2Kg of industrial aluminum (99.7wt% purity) and 0.5KgAl-Ce master alloy (10wt% Ce, 90wt% Al), put it into the hearth of the smelting furnace, heat the furnace body to 860°C to make the materials fully After melting, the temperature of the aluminum alloy melt was lowered to 760° C., and after 10 minutes of heat preservation, the heating was stopped to obtain a secondary alloyed aluminum alloy melt.

[0099] Step 3: After uniformly mixing 1.0Kg of industrial aluminum (99.7wt% purity), 2.5KgAl-Sc (2wt% Sc, 98wt% Al) master a...

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Abstract

The invention provides a novel high-strength corrosion-resistant rare earth aluminum alloy material and a preparation method. Based on a high-strength Al-Zn-Mg alloy, a proper amount of elements of Cu, rare earth Ce, rare earth Sc and rare earth Er are added, and the novel Al-Zn-Mg-Cu-Ce-Sc-Er aluminum alloy material is prepared. The material has the beneficial effects of being high in strength, good in plasticity and toughness, resistant to corrosion, good in fatigue resistance and the like. The material is a structural material which can be widely applied to aviation, spaceflight, ships and warships and means of conveyance. The production and preparation method of the material is simple and easy to practice, the processing technology of the material is easy to control, raw materials are sufficient and easy to obtain, the production cost is low, and the material has very wide production and application prospects.

Description

technical field [0001] The invention belongs to the technical field of alloy materials and preparation, in particular to the field of corrosion-resistant materials, in particular to a high-strength corrosion-resistant rare earth aluminum alloy material and a preparation method thereof. Background technique [0002] With the rapid development of aviation, aerospace and transportation (high-speed trains), the requirements for structural materials are getting higher and higher. On the premise of ensuring the strength, the weight and cost should be reduced as much as possible to improve the carrying capacity and speed. High-strength aluminum alloys with low density and high specific strength have become the first choice. As an excellent lightweight structural material, aluminum alloy is widely used in military and civilian applications, especially after various properties and production processes have been optimized. However, the ductility and fatigue strength of ordinary alumi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/10C22C21/06C22C1/03C22F1/053C22F1/047C22C1/06
CPCC22C1/026C22C1/03C22C1/06C22C21/06C22C21/10C22F1/002C22F1/047C22F1/053
Inventor 李亨吴玉程闫华张真周士昂李萍黄新民
Owner HEFEI UNIV OF TECH
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