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A preparation method of aluminum alloy powder suitable for laser additive manufacturing

A technology of laser additive material and aluminum alloy, which is applied in the direction of additive manufacturing, additive processing, metal processing equipment, etc., can solve the problems of expensive and difficult Sc, and achieve the suppression of crack formation, good grain refinement, and guaranteed use Economical effect

Active Publication Date: 2022-03-25
安德伦(重庆)材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is very difficult to dissolve more than 1.0wt% Sc in the aluminum lattice, and rapid cooling is required during the solidification process; moreover, Sc is relatively expensive, and it is not appropriate to add too much Sc from the perspective of material production and application costs.

Method used

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  • A preparation method of aluminum alloy powder suitable for laser additive manufacturing
  • A preparation method of aluminum alloy powder suitable for laser additive manufacturing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Example 1Al-3.0Mg-0.5Mn-0.15Cu-0.6Sc-2.0Zn-0.3Zr

[0049] This example provides a new type of high-strength aluminum alloy powder suitable for 3D printing, and its composition includes: 3% Mg, 2% Zn, 0.5% Mn, 0.15% Cu, 0.6% Sc, 0.3% Zr, the balance being Al and unavoidable impurities.

[0050] The high-strength aluminum alloy powder provided in this example is prepared by the following method:

[0051] Alloy element raw materials are weighed according to the chemical composition distribution ratio. The alloy raw materials used are pure aluminum ingots, pure zinc blocks, aluminum-copper master alloys, aluminum-zirconium master alloy blocks, aluminum-manganese master alloy blocks and aluminum-magnesium-scandium master alloys. alloy block. Before use, the pure aluminum ingots are subjected to surface treatment such as machining or grinding (wiping with acetone or alcohol if necessary), and then baked together with other raw materials in a muffle furnace (200°C×2h).

[0...

Embodiment 2

[0057] Example 2Al-3.8Mg-0.6Mn-0.15Cu-0.8Sc-3.0Zn-0.4Zr

[0058] This example provides a new type of high-strength aluminum alloy powder suitable for 3D printing, and its composition includes: 3.8% Mg, 3% Zn, 0.6% Mn, 0.15% Cu, 0.8% Sc, 0.4% Zr, the balance being Al and unavoidable impurities.

[0059] The aluminum alloy powder was prepared by a preparation method similar to that of Example 1, and the aluminum alloy powder was prepared into a molded article by a molding method similar to that of Example 1.

[0060] figure 2 Show the equilibrium phase diagram of the Al-3.8Mg-0.6Mn-0.8Sc-3.0Zn-0.4Zr aluminum alloy of the present embodiment, the ordinate is the weight percentage (wt%Phase) of each phase, and the abscissa is temperature / °C ( Temperature / °C). Similar to the result of Example 1, such as figure 2 As shown, the solidification temperature range of the aluminum alloy is 636°C-584°C. During the solidification process of the aluminum alloy, the order of the precipit...

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Abstract

The invention discloses an aluminum alloy powder suitable for laser additive manufacturing and a preparation method thereof. The aluminum alloy powder includes 2-4% Mg, 1.6-3% Zn, 0.3-0.7% Mn, 0.1-0.2% Cu, 0.5 ‑1.0% Sc, 0.3‑0.5% Zr, and the balance is Al; it is prepared by vacuum induction melting gas atomization, the preparation process is designed and controlled, and finally 15‑53 μm aluminum alloy powder is produced. The aluminum alloy provided by the present invention can precipitate fine and dispersed Al from the aluminum alloy liquid during the rapid cooling of 3D printing. 3 Sc or Al 3 (Sc 1‑x ; Zr x ) particles, which play a very good role in grain refinement, reduce the tendency of 3D printing cracks, and improve the density of 3D printing parts. The redesigned preparation method ensures that the mechanical properties and 3D printing forming properties of the obtained aluminum alloy are similar to those of the Scalmalloy alloy, which can better meet the strength requirements of aerospace, transportation, ships and other fields.

Description

technical field [0001] The invention belongs to the technical field of new metal materials for additive manufacturing, and more specifically relates to a method for preparing aluminum alloy powder suitable for laser additive manufacturing. Background technique [0002] Aluminum alloy is the material of choice to achieve lightweight structures, and has broad application prospects in aerospace, transportation, ships and warships and other fields. AIRBUS APWORKS, a foreign subsidiary of Airbus, developed Scalmalloy, a special Al-Mg-Sc aluminum alloy powder material for additive manufacturing in 2006, in response to the demand for additive manufacturing (ie, 3D printing) of aluminum alloy parts for aviation, which is also the first in the world. The aluminum alloy material specially developed for 3D printing, through reasonable composition design, makes the alloy have unique solidification characteristics and solidification process, so that it is limited to the precipitation of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/06C22C1/03B22F9/08B22F1/065B22F1/14B22F10/28B22F10/64B33Y10/00B33Y40/20B33Y70/00
CPCC22C21/06C22C1/026C22C1/03B22F9/082B22F3/24B33Y10/00B33Y40/20B33Y70/00B22F2003/248B22F2009/0824B22F2009/0848B22F1/065
Inventor 谭建均应华
Owner 安德伦(重庆)材料科技有限公司
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