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A high-strength hard aluminum alloy

A hard aluminum alloy, high-strength technology, applied in the field of high-strength hard aluminum alloy, can solve the problems of poor tissue stability, stress corrosion cracking, low-frequency fatigue strength, etc., and achieve the effect of good clothing stability

Inactive Publication Date: 2011-12-21
WUJIANG SHI FINE WORKMANSHIP & ALUMINUM WORD MANUFACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Al-Zn-Mg-Cu series deformation super-high-strength aluminum alloy coded by 7*** has high specific strength and rigidity, easy processing, good corrosion resistance and high fracture toughness, among which 7A04 aluminum alloy It is a relatively mature, long-term and widely used deformed aluminum alloy among ultra-high-strength aluminum alloys. The disadvantages of this alloy are poor structural stability, low low-frequency fatigue strength, and a tendency to stress corrosion cracking

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A high-strength hard aluminum alloy containing the following metal elements: silicon 0.5%, iron 0.5%, copper 2.5%, manganese 0.5%, magnesium 2%, nickel 0.03%, zinc 0.1%, titanium 0.25%, niobium 0.22%, Chromium 0.35%, Beryllium 0.005% and balance aluminum.

[0022] The preparation method of high-strength hard aluminum alloy includes the following steps: (1) Heating the furnace body to 730-750 ℃, smelting each raw material according to the proportion, fully stirring evenly, refining, removing slag and degassing, After standing at 700-700℃ for 20min, take samples for analysis and adjustment before the furnace to ensure that the content of each element is within the allowable range, cast the strip in the casting machine, and introduce the cast strip into the rolling mill. The temperature of the introduction into the rolling mill is 500- 520 ℃, the lead-out temperature is 300-320 ℃, heating during hot rolling; (2), cold-roll the aluminum alloy strip mill into aluminum alloy ...

Embodiment 2

[0025] A high-strength hard aluminum alloy containing the following metal elements: silicon 1.5%, iron 1.0%, copper 6.5%, manganese 1.0%, magnesium 4%, nickel 0.1%, zinc 0.5%, titanium 0.55%, niobium 0.52%, Chromium 0.75%, Beryllium 0.01% and balance aluminum. The preparation method is the same as that of Example 1.

[0026] The tensile strength of the obtained aluminum alloy in the T6 state was 530 MPa, the elongation was 9%, and the yield strength was 510 MPa.

Embodiment 3

[0028] A high-strength hard aluminum alloy containing the following metal elements: silicon 1.0%, iron 0.8%, copper 4.3%, manganese 0.7%, magnesium 2.5%, nickel 0.08%, zinc 0.35%, titanium 0.38%, niobium 0.43%, Chromium 0.45%, Beryllium 0.007% and balance aluminum. The preparation method is the same as that of Example 1.

[0029] The tensile strength of the obtained aluminum alloy in the T6 state is 498 MPa, the elongation is 7.9%, and the yield strength is 500 MPa.

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Abstract

A high-strength hard aluminum alloy containing the following metal elements: 0.5-1.5% silicon, 0.5-1.0% iron, 2.5-6.5% copper, 0.5-1.0% manganese, 2-4% magnesium, 0.03-0.1% nickel, Zinc 0.1-0.5%, titanium 0.25-0.55%, beryllium 0.005-0.01%, niobium 0.22-0.52%, chromium 0.35-0.75 and the balance aluminum. The alloy obtained by the invention can be strengthened by high heat treatment, has good plasticity in annealed and just quenched states, can be quenched and aged, has good clothing stability, and can be used to make highly composite parts and components, such as skeleton parts on aircraft, Rivets, compressor blades, discs, welded parts such as containers, etc.

Description

technical field [0001] The invention relates to a high-strength hard aluminum alloy. Background technique [0002] Aluminum alloys can be divided into denatured aluminum alloys and cast aluminum alloys according to processing methods, and deformed aluminum alloys are further divided into non-heat-treatable-strengthened aluminum alloys and heat-treatable-strengthened aluminum alloys. The latter can improve mechanical properties through heat treatment methods such as quenching and aging. , can be divided into hard aluminum, forged aluminum (LD+ number indicates the grade), super hard aluminum and special aluminum alloy. The Al-Zn-Mg-Cu series deformed ultra-high strength aluminum alloy with 7*** as the code has high specific strength and rigidity, easy processing, good corrosion resistance and high fracture toughness, among which 7A04 aluminum alloy It is a relatively mature, long-term and widely used deformed aluminum alloy among ultra-high-strength aluminum alloys. The ...

Claims

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Application Information

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IPC IPC(8): C22C21/08C22C21/18
Inventor 谢利荣
Owner WUJIANG SHI FINE WORKMANSHIP & ALUMINUM WORD MANUFACTORY
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