Method of production using melting and hot isostatic pressing

A technology of additive manufacturing and powder layer, applied in the field of powder metallurgy

Active Publication Date: 2018-08-31
ADDUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0020] However, the method described here has some disadvantages, notably the need to use two energy sources depending on whether the core of the part or the skin of the part needs to be melted

Method used

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  • Method of production using melting and hot isostatic pressing

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Embodiment Construction

[0050] Such as figure 1 and figure 2 As shown, the invention relates to a method for producing a three-dimensional object 1 .

[0051] The manufacturing method according to the invention consists more precisely in forming a three-dimensional object 1 by stacking a plurality of thin layers 4 of powder (usually metal), said powder being able to be melted in some places of layers 4 by means of an energy source or energy beam.

[0052] Regarding the powder used in the method of the present invention, it is generally a metal powder comprising a single metal or a mixture or alloy of several metals.

[0053] However, this embodiment should not be seen as limiting, the powders used in the method of the invention may also, for example, comprise ceramic powders.

[0054]In a specific embodiment, "doped" powders are used in carrying out the various steps of the method, ie in which the preferably metallic particles are provided with nanoparticles.

[0055] With regard to the size of t...

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Abstract

The invention relates to a method for producing a three-dimensional object (1) from a stack of powder layers, said three-dimensional object (1) comprising an outer skin (2) and an inner three-dimensional mesh (3). The object (1) is formed by a stack of multiple powder layers (4), each layer having at least one outer edge (20) enclosing a central portion (5) comprising an inner mesh (30). The stackof outer edges (20) of the layers (4) forms the outer skin (2) of the object (1) and the stack of inner meshes (30) of the layers (4) forms the inner three-dimensional mesh (3) of the object (1). Themethod comprises: forming micro-connections between the powder grains, by scanning at least part of one powder layer using an electron beam; melting the outer edge and the inner mesh in successive melting / solidification steps for each layer, said mesh penetrating part of the width of the outer edge; repeating the preceding steps as many times as necessary in order to obtain the desired object (1), and subsequently performing a hot isostatic pressing (HIP) step on same.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in which metal parts are obtained by sintering metal powders. [0002] More specifically, in a particularly innovative way, the present method combines powder metallurgy with additive manufacturing; that is, a method of forming components by adding material, in particular by stacking successive layers. [0003] The invention will mainly be applied in the field of methods of manufacturing components in which the process of forming said components is a physical process, in particular a melting process, followed by solidification of metal powder. Background technique [0004] In the classical method of powder metallurgy, before the step of hot isostatic pressing (compression isostatique à chaud, CIC), the powder is usually encapsulated in a solid package which is pre-tailored for the part to be manufactured. [0005] But due to diffusion welding, the CIC step results in compaction of most of the mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105B22F5/10
CPCB22F5/10B22F2998/10Y02P10/25B22F10/64B22F10/25B33Y40/20B22F3/15B33Y80/00B33Y10/00B33Y70/10B23K15/0086
Inventor P·旺内罗特
Owner ADDUP
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