2024 aluminum alloy laser selective melting forming method

A technology of laser selective melting and aluminum alloy, which is applied in the direction of additive manufacturing, energy efficiency improvement, additive processing, etc., and can solve the problems that 2024 aluminum alloy can not be integrally formed with complex inner cavity precision components

Inactive Publication Date: 2019-02-15
XIAN SPACE ENGINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the problem that the traditional casting, forging, and mechanical processing techniques cannot be used for the integral forming of complex inner cav

Method used

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  • 2024 aluminum alloy laser selective melting forming method

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Embodiment 1

[0028] A 2024 aluminum alloy laser selective melting forming method, the steps of the method comprising:

[0029] (1) Utilize 2024 aluminum alloy rods for gas atomization and pulverization to obtain metal powders with particle sizes ranging from 15 μm to 53 μm;

[0030] (2) Using the powder obtained in step (1) to carry out selective laser melting and forming to obtain a 2024 aluminum alloy member whose shape meets the requirements;

[0031] (3) The 2024 aluminum alloy component obtained in step (2) whose shape meets the requirements is subjected to solution aging treatment to obtain a 2024 aluminum alloy component whose shape and mechanical properties meet the requirements.

[0032] In the step (1), the 2024 aluminum alloy bar is used as the raw material, and the gas atomization pulverization method is adopted, the atomization gas is argon, the pressure is 4.5MPa, the superheat of the molten metal is 200°C, and the flow rate of the molten metal is 18Kg per minute to obtain a...

Embodiment 2

[0037] A 2024 aluminum alloy laser selective melting forming method. 2024 aluminum alloy rods are used for gas atomization powder making to obtain metal powders with a particle size range of 15 μm to 53 μm; the obtained metal powders are used as raw materials, and the process parameters are laser power 220W, spot diameter 0.14mm, and scanning speed. 700mm / s, powder layer thickness 0.04mm, prepare 2024 aluminum alloy components, and then place them in a vacuum furnace for heat treatment, raise the temperature to a solid solution temperature of 510°C, keep warm for 1.5h, water quench and cool to the aging temperature, the aging temperature is 190°C, Keep warm for 12 hours and cool in air.

[0038] The obtained 2024 aluminum alloy components were tested for mechanical properties using the same batch of samples. The test methods were GB / T228.1 and GB / T228.2. The test results showed that the tensile strength at room temperature reached 525MPa~537MPa, and the yield strength reached ...

Embodiment 3

[0040] A 2024 aluminum alloy laser selective melting forming method. 2024 aluminum alloy rods are used for gas atomization powder making to obtain metal powders with a particle size range of 15 μm to 53 μm; the obtained metal powders are used as raw materials, and the process parameters are laser power 200W, spot diameter 0.12mm, and scanning speed. 600mm / s, powder layer thickness 0.03mm, prepare 2024 aluminum alloy components, and then place them in a vacuum furnace for heat treatment, heat up to a solid solution temperature of 500°C, hold for 1.5h, water quench and cool to an aging temperature of 180°C, hold for 12h, air cooled.

[0041] The obtained 2024 aluminum alloy components were tested for mechanical properties using the same batch of samples. The test methods were GB / T228.1 and GB / T228.2. The test results showed that the tensile strength at room temperature reached 541MPa~558MPa, and the yield strength reached 337MPa~ 352MPa, the elongation reaches 12.3% to 15.8%. ...

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Abstract

The invention discloses a 2024 aluminum alloy laser selective melting forming method. The method comprises the following steps that (1) gas atomization powder making is carried out by using a 2024 aluminum alloy bar to obtain metal powder; (2) the powder obtained by the step (1) is subjected to laser selective melting forming to obtain a 2024 aluminum alloy member meeting shape satisfying requirements; and (3) the 2024 aluminum alloy member meeting the shape requirements and obtained in the step (2) is subjected to solution aging treatment, and a 2024 aluminum alloy member with the shape and the mechanical property both meeting the requirement is obtained. By means of the above process, a 2024 aluminum alloy is characterized in that the room temperature tensile strength is not less than 500 MPa, the yield strength is not less than 320 MPa, the ductility is not less than 10%, and the requirements of aerospace products for the strength and plasticity of the 2024 aluminum alloy can be met.

Description

technical field [0001] The invention relates to a 2024 aluminum alloy forming method, which belongs to the technical field of metal forming. Background technique [0002] Aluminum alloy has a series of advantages such as low density, high specific strength, strong corrosion resistance, easy thermal and electrical conductivity, good plasticity and processing performance, and low cost. It is widely used in aviation, aerospace, weapons, ships, automobiles and electronics. An important material in the manufacture of turbo pumps for aerospace power plants. [0003] With the dramatic increase in rocket engine thrust and thrust-to-mass ratio, the key components of a new generation of liquid rocket engines are complex, thin-walled, integrated, and lightweight, which puts forward higher requirements for the mechanical properties of aluminum alloy materials . [0004] 2024 aluminum alloy is a high-strength forged aluminum alloy, which can meet the material requirements of engines su...

Claims

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Application Information

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IPC IPC(8): B22F3/105B22F9/08B22F3/24B33Y10/00
CPCB22F3/24B22F9/082B33Y10/00B22F2003/248B22F2998/10B22F10/00B22F10/36B22F10/34B22F10/28B22F10/64Y02P10/25
Inventor 马双民杨欢庆王云王琳彭东剑
Owner XIAN SPACE ENGINE CO LTD
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