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Medium-strength anti-corrosion aluminium alloy powder

A technology for corrosion-resistant aluminum alloy and aluminum alloy powder, applied in the field of aluminum alloy powder, can solve the problems of unsatisfactory, complicated casting and heat treatment processes, etc., and achieve the effects of good corrosion resistance, small powder particle size, and excellent mechanical properties

Active Publication Date: 2016-03-16
江西宝航新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the invention patent of CN104862556A "a high-strength and high-stress corrosion-resistant aluminum alloy for aerospace and its preparation method" discloses an Al-Zn-Mg-Cu-based high-strength stress-corrosion-resistant aluminum alloy. Although this patent has obtained high Alloy strength and good corrosion resistance, but the disadvantage is that expensive elements such as In are used, and the preparation process is complex casting and heat treatment process, which cannot meet the requirements of near net shape powder metallurgy and 3D printing forming process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] A medium-strength corrosion-resistant aluminum alloy powder for aviation aircraft, the composition and content of elements in the aluminum alloy powder are: Mg9.5wt.%, Mn4.0wt.%, Zn0.51wt.%, Si0.80wt.%, Sn0 .23wt.%, Ti0.50wt.%, Zr0.42wt.%, Yb0.50wt.%, Fe0.10wt.%, Ta0.11wt.%, Ni0.05wt.%, the balance is Al, aluminum alloy powder The particle size is 50 μm.

[0012] The above-mentioned aluminum alloy powder was used to manufacture the wing stringer parts by hot isostatic pressing and sintering process of powder metallurgy, and tensile samples were cut from the parts, and the tensile strength of the samples was measured at room temperature according to the GB / T228-2010 standard. The mechanical properties are: tensile strength 454MPa, yield strength 402MPa, elongation 8.1%. Determination of corrosion grade according to ASTM34-79 standard, the solution system is NaCl+KNO 3 +HNO 3 , the test temperature is 25°C, and the corrosion time is 120h. It is determined that the corr...

Embodiment 2

[0014] A medium-strength corrosion-resistant aluminum alloy powder for aviation aircraft, the composition and content of elements in the aluminum alloy powder are: Mg14.5wt.%, Mn3.2wt.%, Zn0.60wt.%, Si0.68wt.%, Sn0 .50wt.%, Ti0.32wt.%, Zr0.50wt.%, Yb0.29wt.%, Fe0.14wt.%, Ta0.20wt.%, Ni0.04wt.%, the balance is Al, aluminum alloy powder The particle size is 5 μm.

[0015] The above-mentioned aluminum alloy powder was used to manufacture the wing stringer parts by hot isostatic pressing and sintering process of powder metallurgy, and tensile samples were cut from the parts, and the tensile strength of the samples was measured at room temperature according to the GB / T228-2010 standard. The mechanical properties are: tensile strength 512MPa, yield strength 438MPa, elongation 11.7%. Determination of corrosion grade according to ASTM34-79 standard, the solution system is NaCl+KNO 3 +HNO 3 , the test temperature is 25°C, and the corrosion time is 120h. It is determined that the cor...

Embodiment 3

[0017] A medium-strength corrosion-resistant aluminum alloy powder for aviation aircraft, the composition and content of elements in the aluminum alloy powder are: Mg11.2wt.%, Mn2.0wt.%, Zn0.37wt.%, Si0.40wt.%, Sn0 .10wt.%, Ti0.28wt.%, Zr0.23wt.%, Yb0.19wt.%, Fe0.20wt.%, Ta0.17wt.%, Ni0.02wt.%, the balance is Al, aluminum alloy powder The particle size is 25 μm.

[0018] The above-mentioned aluminum alloy powder was used to manufacture the wing stringer parts by hot isostatic pressing and sintering process of powder metallurgy, and tensile samples were cut from the parts, and the tensile strength of the samples was measured at room temperature according to the GB / T228-2010 standard. The mechanical properties are: tensile strength 477MPa, yield strength 4118MPa, elongation 9.3%. Determination of corrosion grade according to ASTM34-79 standard, the solution system is NaCl+KNO 3 +HNO 3 , the test temperature is 25°C, and the corrosion time is 120h. It is determined that the co...

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Abstract

The invention discloses medium-strength anti-corrosion aluminium alloy powder, which comprises element constituents and contents according to mass percent: 9.5-14.5 wt% of Mg, 2.0-4.0 wt% of Mn, 0.20-0.60 wt% of Zn, 0.40-0.80 wt% of Si, 0.10-0.50 wt% of Sn, 0.20-0.50 wt% of Ti, 0.10-0.50 wt% of Zr, 0.10-0.5 0wt% of Yb, 0.10-0.20 wt% of Fe, 0.05-0.20 wt% of Ta, smaller than or equal to 0.05 wt% of Ni, and the balance Al, and the grain diameter of the aluminium alloy powder is 5-50 micrometers. The medium-strength anti-corrosion aluminium alloy powder is spherical, the grain diameter of the aluminium alloy powder is small, and the variety of the element constituents in aluminium alloy is small, so that the medium-strength anti-corrosion aluminium alloy powder is very suitable for powder metallurgy of aero medium-strength aluminium alloy parts or 3D printing technology forming; and the obtained aluminium alloy parts are excellent in mechanical property and good in corrosion resistance, and can replace titanium alloy used in part of aircrafts.

Description

technical field [0001] The invention relates to aluminum alloy powder, in particular to a medium-strength corrosion-resistant aluminum alloy powder for aviation aircraft. Background technique [0002] Due to the low density of aluminum alloy (only 2.7g / cm 3 , which is 60% of the density of titanium alloy and 35% of the density of steel), high specific strength, high specific stiffness, corrosion resistance, low processing cost, renewable recycling and other advantages, it has been widely used in aviation vehicles. At present, various types of aluminum alloy materials have been widely used in civil or military aircraft, such as bulkheads, skins, upper beam chords, stringers and other parts have used 2xxx and 7xxx aluminum alloy profiles , Plates, etc. [0003] With the increasingly complex service environment of aircraft, such as military aircraft used in highly corrosive marine environments, the requirements for materials are not limited to mechanical performance indicator...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08B22F1/00
CPCC22C21/08B22F1/065
Inventor 李振民杨红强胡玉
Owner 江西宝航新材料有限公司
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