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Weldable aluminum alloy comprising Zn as main alloying element for direct metal laser sintering

An aluminum alloy and laser diffraction technology, which is applied in metal processing equipment, transportation and packaging, and improvement of process efficiency, can solve problems such as limited shape combinations and inability to build parts with aluminum alloys

Pending Publication Date: 2022-07-08
EOS ELECTRO OPTICAL SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally, there are limits to the shape combinations achievable with conventional casting, so it may not be possible to build parts from this aluminum alloy

Method used

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  • Weldable aluminum alloy comprising Zn as main alloying element for direct metal laser sintering
  • Weldable aluminum alloy comprising Zn as main alloying element for direct metal laser sintering
  • Weldable aluminum alloy comprising Zn as main alloying element for direct metal laser sintering

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0069] For the following samples 1 and 2, the Al7017 alloy type composite was composed of Al7017 pre-alloyed (d50=38 μm), Zr powder (d50=30 μm) and B 4 The powder of C powder (d50=13μm) or TiC nano powder (d50<40nm) is dry-blended. Al7017 has the following composition: 0.42 wt.-% Si, 0.5 wt.-% Fe, 0.11 wt.-% Cu, 0.27 wt.-% Mn, 2.8 wt.-% Mg, 4.7 wt.-% Zn and 0.23 wt.-% Zr.

[0070] For samples 3 and 4, in addition to Zr and TiC additives, a dry powder mixture of Al7017 pre-alloyed (d50 = 48 μm) was used with a composition of 0.44 wt.-% Si, 0.43 wt.-% Fe, <0.01 wt. -% Cu, 0.24 wt.-% Mn, 2.5 wt.-% Mg, 4.6 wt.-% Zn and 0.2 wt.-% Zr. In these samples, the respective additives were Zr powder (d50=30 μm) and TiC powder (d50=1.4 μm). All respective raw materials were obtained from commercial powder producers. The ingredients of the powder mix are provided in Table I below.

[0071] Table I. Composition of Powder Mixtures

[0072]

[0073]

[0074] The powder mixes were prepa...

example 2

[0088] By dry mixing Al7075 pre-alloyed (d50=48μm) powder, Zr powder (d50=30μm) and B 4 C powder (d50=13 μm) to make Al7075 alloy type composites. Al7075 has the following composition: 0.08wt.-% Si, 0.17wt.-% Fe, 0.22wt.-% Cr, 1.7wt.-% Cu, 0.008wt.-% Mn, 2.0wt.-% Mg, 5.3 wt.-% Zn and 0.004 wt.-% Zr. The respective raw materials were obtained from commercial powder producers. The ingredients of the powder mix are provided in Table III below.

[0089] Table III. Composition of Powder Mixtures

[0090] Sample 5 Al alloy powder remaining Zr 4.0 B 4 C

0.8

[0091] The powder mix was prepared by mechanical dry blending the ingredients using a commercially available Merris SpinMix 550 mixer for 90 min at a speed of about 20 rpm.

[0092] The compositions described in Table III were processed into 3D objects by DMLS on an EOS M290 machine. Appropriate DMLS processing parameters were determined by screening experiments involving the fabricati...

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Abstract

The invention relates to a powder mixture for producing a three-dimensional object by means of additive manufacturing, wherein the powder mixture comprises a first material and a second material. In the respective powder mixtures, the first material comprises a mixture of an aluminum alloy or an elemental precursor thereof and is in powder form, and the second material comprises a metal powder of Zr and / or Hf. By adding a second material, three-dimensional objects having high ultimate tensile strength and yield strength may be prepared by additive manufacturing. The invention also relates to a process for producing a corresponding powder mixture and a three-dimensional object, to a correspondingly produced three-dimensional object and to a device for implementing the process for producing such an object, and to the use of a corresponding powder mixture for increasing one or more of the ultimate tensile strength and yield strength of a three-dimensional object based on an aluminum alloy.

Description

technical field [0001] The present invention relates to a powder mixture for the manufacture of three-dimensional objects by means of additive manufacturing, wherein the powder mixture comprises a first material and a second material. In the respective powder mixtures, the first material comprises a mixture of aluminum alloys or elemental precursors thereof, and is in powder form, and the second material comprises metal powders of Zr and / or Hf. The present invention also relates to a process for producing corresponding powder mixtures and three-dimensional objects, correspondingly produced three-dimensional objects and devices for carrying out the process for producing such objects, as well as corresponding powder mixtures in increasing the ultimate tensile strength and performance of three-dimensional objects based on aluminum alloys. Use of one or more of yield strength. Background technique [0002] Aluminum alloys, especially those that provide high strength, are the su...

Claims

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Application Information

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IPC IPC(8): C22C21/10B22F1/052
CPCB33Y70/00B33Y40/20B33Y10/00B22F2998/10C22C1/0416C22C21/10Y02P10/25B33Y80/00B33Y40/10B33Y50/02B22F10/28B22F10/36C22C1/05B33Y30/00B22F10/38B22F10/64B22F1/052B22F12/33B22F2301/052B22F2301/205
Inventor M·尼斯特罗姆J·西莫拉H·凯基宁
Owner EOS ELECTRO OPTICAL SYST
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