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Sc/Zr modified high-modulus and high-strength aluminum-lithium alloy and laser forming method thereof

An aluminum-lithium alloy, laser forming technology, applied in the direction of process efficiency improvement, energy efficiency improvement, additive manufacturing, etc., can solve problems such as poor adaptability of laser forming process

Active Publication Date: 2022-02-25
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a Sc/Zr modified high-modulus high-strength aluminum-lithium a...

Method used

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  • Sc/Zr modified high-modulus and high-strength aluminum-lithium alloy and laser forming method thereof
  • Sc/Zr modified high-modulus and high-strength aluminum-lithium alloy and laser forming method thereof
  • Sc/Zr modified high-modulus and high-strength aluminum-lithium alloy and laser forming method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A laser forming method of a Sc / Zr modified high-modulus high-strength aluminum-lithium alloy, comprising the following steps:

[0032] S1: Preparation of raw material powder

[0033] Add ingot Sc and ingot Zr to 1460 aluminum-lithium alloy, the mass ratio of ingot Sc to ingot Zr is 4:1, and the above-mentioned Sc / Zr modified high-modulus high-strength aluminum-lithium alloy powder is adopted by gas atomization process The preparation of the body obtained a Sc / Zr modified high modulus high strength aluminum-lithium alloy powder; in terms of mass percentage, its composition was 1.83wt% Li; 3.02wt% Cu; 0.002wt% Mg; 0.020wt% %Ti; 0.06wt% Fe; 0.014wt% Si; 0.72wt% Sc; 0.19wt% Zr; the balance is Al;

[0034] The powder particle size of Sc / Zr modified high-modulus high-strength aluminum-lithium alloy powder is 15um~53um;

[0035] Drying the Sc / Zr-modified high-modulus high-strength aluminum-lithium alloy powder at 120° C. for 6 hours to obtain the dried Sc / Zr-modi...

Embodiment 2

[0039] A laser forming method of a Sc / Zr modified high-modulus high-strength aluminum-lithium alloy, comprising the following steps:

[0040] S1: Preparation of raw material powder

[0041] Add ingot Sc and ingot Zr to 1460 aluminum-lithium alloy, the mass ratio of ingot Sc to ingot Zr is 2:1, and the above-mentioned Sc / Zr modified high-modulus high-strength aluminum-lithium alloy powder is adopted by gas atomization process A Sc / Zr modified high-modulus high-strength aluminum-lithium alloy powder was obtained; in terms of mass percentage, its composition was: 2.4wt% Li; 2.95wt% Cu; 0.002wt% Mg; 0.036 wt% of Ti; 0.072wt% of Fe; 0.0170wt% of Si; 1.23wt% of Sc; 0.60wt% of Zr; the balance is Al;

[0042] The powder particle size of Sc / Zr modified high-modulus high-strength aluminum-lithium alloy powder is 15um~53um;

[0043] Drying the Sc / Zr-modified high-modulus high-strength aluminum-lithium alloy powder at 150°C for 3 hours to obtain the dried Sc / Zr-modified high...

Embodiment 3

[0047] The difference from Example 1 is that in S1, the mass ratio of the ingot Sc to the ingot Zr is 2:1, and a Sc / Zr modified high-modulus high-strength aluminum-lithium alloy powder is obtained; in terms of mass percentage, its The composition is 2.04wt% Li; 2.69wt% Cu; 0.05wt% Mg; 0.05% Ti; 0.012wt% Fe; 0.1wt% Si; 1.4wt% Sc; 0.5wt% Zr; The balance is Al; drying is at 120°C for 4.5 hours for powder drying;

[0048] In S2, the laser power of laser forming is 360W, the laser scanning rate is 800mm / s, other steps and parameters are the same as in Example 1, and a Sc / Zr modified high-modulus high-strength aluminum-lithium alloy is obtained.

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Abstract

The invention discloses an Sc/Zr modified high-modulus and high-strength aluminum-lithium alloy and a laser forming method thereof, and belongs to the technical field of laser forming. The method comprises the following steps that: firstly, rare earth elements Sc and Zr are added into an aluminum-lithium alloy to obtain modified powder; and due to the addition of the elements Sc and Zr, alloy grains are refined, the alloy strength is improved, the thermal cracking resistance is improved, and the problem that the aluminum-lithium alloy is prone to cracking in the laser forming process is remarkably solved. The invention discloses the laser forming method of the Sc/Zr modified high-modulus and high-strength aluminum-lithium alloy. Laser forming process parameters are suitable for all aluminum lithium alloys with alloy components in a nominal component range. An optimal performance process window is obtained, the aluminum-lithium alloy prepared through adopting the laser forming method is compact in structure and free of hot cracks, and has the excellent performance of high strength and high modulus.

Description

technical field [0001] The invention belongs to the technical field of laser forming, and in particular relates to a Sc / Zr modified high-modulus high-strength aluminum-lithium alloy and a laser forming method thereof. Background technique [0002] Aluminum-lithium alloy has the advantages of low density, high elastic modulus, and high specific strength. It has been widely used in aviation, aerospace and other fields. It is one of the most ideal lightweight and high-strength structural materials in the aerospace industry. Additive manufacturing technology is a new type of digital precise shape control and controllable manufacturing technology that has developed extremely rapidly in recent years. Compared with traditional manufacturing technology, this technology has the advantages of no mold, flexibility, and high material utilization. The most important thing is , this advanced manufacturing technology provides an efficient and feasible solution for the production of precisi...

Claims

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Application Information

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IPC IPC(8): B22F10/28B33Y10/00B33Y70/00C22C21/16C22C1/04B22F9/08
CPCB22F10/28B33Y10/00B33Y70/00C22C21/14C22C21/16C22C1/0416B22F9/082Y02P10/25
Inventor 陈静孙楚明宪良郑敏张强
Owner NORTHWESTERN POLYTECHNICAL UNIV
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