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Method for preparing metal powder for additive manufacturing process and use of such powder

A technology of additive manufacturing and metal powder, which is applied in the field of metal powder and can solve problems such as not being suitable

Pending Publication Date: 2022-03-22
流体力学与摩擦公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Current additive manufacturing processes are not well suited to producing parts from these metals

Method used

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  • Method for preparing metal powder for additive manufacturing process and use of such powder
  • Method for preparing metal powder for additive manufacturing process and use of such powder
  • Method for preparing metal powder for additive manufacturing process and use of such powder

Examples

Experimental program
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Embodiment Construction

[0063] Figure 1 to Figure 10 The invention is exemplified, designed for the preparation of metal powders (1) intended for use in additive manufacturing processes, such as by scanning a powder bed (2) with a near-infrared laser beam (3).

[0064] figure 1 and figure 2 The steps for producing a 3D part (5) by using the SLM additive manufacturing process are shown.

[0065] 1. A fine layer of powder (1) is spread from the plate (7) to the piston (8) by the roller (6) to form the powder bed (2). At the start of the production of the part (5), the piston (7) is at its highest point.

[0066] 2. The layer is sintered / melted by a high power laser (3), which traces a 2D section onto the surface of the powder (1). The powder (1) solidifies immediately after the laser (3) is stopped.

[0067] 3. The piston (7) supporting the 3D piece (5) during production is lowered from the thickness of the layer produced, while the level of the plate (7) is used to adjust the level of the powde...

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Abstract

The invention relates to a method for preparing a metal powder intended for an additive manufacturing process of the type involving scanning a powder bed by means of a near-infrared laser beam, characterized in that it comprises: an initial step for selecting the powder, the powder has an optical reflectance higher than 70% for a wavelength ranging from 800 nm to 1500 nm; then a step for treating said powder, different from particle grafting, and causing physical and / or chemical surface modification of the particles (4) of said powder, such that it can be reduced in its optical reflectivity at a given wavelength. The invention also relates to the use of such a powder, the particles (4) having a median particle size d50 after treatment of between 5 [mu] m and 50 [mu] m.

Description

technical field [0001] The present invention relates to a process for the preparation of metal powders intended for use in additive manufacturing processes of the type that involve scanning a powder bed with a near-infrared laser beam. [0002] The invention also relates to the use of the metal powder obtained by the preparation method for additive manufacturing operations. [0003] The field of the invention is that of preparing metal powders intended for additive manufacturing, for all industrial applications, especially in the automotive, aviation and aerospace fields. Background technique [0004] Currently, additive manufacturing technologies of the Selective Laser Melting (SLM) type are developing rapidly, especially for forming metal parts. The principle of the SLM process on a powder bed is to melt a thin layer of powder (metal, plastic, ceramic, etc.) using a high-power laser. [0005] These techniques make it possible to manufacture components of complex shapes t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/04B01J13/22B22F1/17B29C64/153B33Y70/00C22C1/00B22F1/065B22F1/145
CPCB01J13/04B01J13/22B33Y70/00Y02P10/25B22F1/065B22F1/145B22F1/17B22F10/28B22F10/34B22F1/16B22F2304/10B22F2301/052B22F2301/10B22F2301/25B33Y40/10
Inventor 塞巴斯蒂安·比谢克里斯托夫·热拉尔·皮比耶
Owner 流体力学与摩擦公司