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Ultra-high-strength aluminum alloy and its preparation method

An ultra-high-strength, aluminum alloy technology, applied in the field of aluminum alloys, can solve the problem that the tensile strength cannot reach 800MPa, and achieve good economic and social benefits

Active Publication Date: 2019-01-29
薛元良
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the tensile strength of current aluminum alloy materials cannot reach 800MPa

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～7、 comparative example 1～5

[0060] Prepare the aluminum alloy material according to the formula shown in Table 1:

[0061] Table 1 The formula of the embodiment of the present invention and comparative example aluminum alloy product

[0062] Composition (wt%)

Cu

Mg

Zn

Nd

Ni

mn

Ti

Al

product shape

Example 1

3.5

8.2

21

0.3

0.87

0.15

0.04

margin

Great

Example 2

9.5

5.1

2.5

1.25

1.95

1.75

0.50

margin

Great

Example 3

4.3

9.5

18

0.57

0.55

0.51

0.05

margin

Great

Example 4

4.7

3.9

16

0.75

0.35

0.85

0.19

margin

Great

Example 5

5.9

7.3

10

0.95

1.05

1.17

0.35

margin

Tube

Example 6

6.8

2.5

31

0.21

0.10

0.32

0.08

margin

Tube

Example 7

8.2

6.5

5

1.1

1.53

1.56

0.45

margin

Tube

Comparative example 1

1.8

2.5

5.8

...

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Abstract

The invention provides an ultrahigh-strength aluminum alloy, which comprises 3.0-10.0wt% of Cu, 2.0-9.7wt% of Mg, 1.7-38wt% of Zn, 0.1-1.3wt% of Nd, 0.05-2wt% of Ni, 0.05-1.77wt% of Mn, 0.01-0.5wt% ofT and the balance of Al. The invention also provides a preparation method of the ultrahigh-strength aluminum alloy. According to the preparation method provided by the invention, an aluminum alloy material is prepared by adopting a specific formula and a spray forming process, the micro-structure of the aluminum alloy material is obviously refined, and the precipitated phase is fine and uniformlydistributed, so that the mechanical property of the aluminum alloy material is hardly anisotropic, and the aluminum alloy material has the advantages of high strength, high toughness, high rigidity and light weight. Experimental results show that after T6 treatment, the tensile strength of the ultrahigh-strength aluminum alloy provided by the invention is higher than or equal to 917MPa, and the yield strength is higher than or equal to 874MPa.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys, and in particular relates to an ultra-high-strength aluminum alloy and a preparation method thereof. Background technique [0002] Aluminum alloy has the advantages of low density, high specific strength, good toughness and corrosion resistance, and is an indispensable and important structural material in aerospace, transportation, and machinery manufacturing industries. With the development of the national economy and national defense construction, there is a great demand for ultra-high-strength aluminum alloy materials. [0003] The prior art discloses a variety of high-strength aluminum alloy materials. For example, the national standard GB / T437.1-2000 for seamless aluminum tubes discloses 7075T6, which has the highest tensile strength and yield strength. The maximum tensile strength is 560MPa, and the yield strength The maximum is 505MPa; the national standard for aluminum rods GB / T3...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/16C22C21/18C22C21/06C22C21/10C22C1/03C22F1/047C22F1/053C22F1/057
CPCC22C1/026C22C1/03C22C21/06C22C21/10C22C21/16C22C21/18C22F1/002C22F1/047C22F1/053C22F1/057
Inventor 薛元良
Owner 薛元良
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