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Method for generating a component by a powder-bed-based additive manufacturing method and powder for use in such a method

A technology of additive manufacturing, powder bed, applied in the field of producing components and powders used in such additive manufacturing based on powder bed, which can solve the problem of powder layer powder bed, powder bed surface cannot maintain Problems of flatness, damage to the quality of the component to be manufactured, etc.

Active Publication Date: 2019-04-16
西门子能源全球两合公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sintering of the powder bed may additionally cause the surface of the powder bed to not remain flat (eben)
Recoating (Auftag) of the powder layer thus becomes difficult and geometrical imperfections arise in the surface of the powder bed
thus compromising the quality of the component to be produced

Method used

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  • Method for generating a component by a powder-bed-based additive manufacturing method and powder for use in such a method
  • Method for generating a component by a powder-bed-based additive manufacturing method and powder for use in such a method
  • Method for generating a component by a powder-bed-based additive manufacturing method and powder for use in such a method

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Embodiment Construction

[0028] exist figure 1 A device 11 for laser melting is schematically shown in . The device has a process chamber 12 in which a powder bed 13 can be produced. In order to produce each layer of the powder bed 13, a distribution mechanism in the form of a scraper (Rakel) 14 is moved past the powder reservoir (Pulvervorrat) 15 and then through the powder bed 13, thereby producing thin layers in the powder bed 13. powder layer. The laser 16 then generates a laser beam 17 which is moved over the surface of the powder bed 13 by means of an optical deflection device with a mirror 18 . The powder is melted here at the point of incidence of the laser beam 17 , thus producing the component 19 .

[0029] The powder bed 13 is produced on a structural platform 20 which can be gradually lowered by the corresponding powder layer thickness by means of an actuator 21 in a pot-shaped housing 22 . A heating device 23 in the form of a resistive heating device (an induction coil is also possibl...

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Abstract

The invention relates to a method for generating a component (19) by a powder-bed-based additive manufacturing method, such as for example laser melting. According to the invention, it is envisaged touse a powder which comprises particles 25, consisting of a core (26) and a shell (27). Considered as a whole, the particles (25) have in this case the alloy composition of the component (19). However, the concentration of higher-melting alloy elements is greater in the shell (27) and the concentration of lower-melting alloy elements is greater in the core (26), and so the surface of the particles(25) is higher in comparison with particles with a constant alloy composition. This advantageously prevents the particles (25) from caking together in the powder bed during the production of the component (19), and so the powder bed can also be subjected to high preheating temperatures of up to 1000DC. The invention also relates to a powder that is suitable for use in the aforementioned method.

Description

technical field [0001] The invention relates to a method for producing components with a powder bed-based additive manufacturing method, in particular from superalloys. In this method, the component is formed layer by layer in a powder bed by melting the particles forming the powder bed with an energy beam, for example an electron beam or a laser beam. Before and during melting of the particles, the powder bed is here preheated to a temperature below the melting point of the particles. Furthermore, the invention relates to a powder consisting of a metal alloy which is suitable for use in powder bed-based additive manufacturing methods. Background technique [0002] A method of the type mentioned at the outset is known, for example, from EP 1 355 760 B1. The method for selective laser melting (SLM) discussed in this text should be suitable for processing high melting point materials. Since it is interesting to be able to produce components with a low degree of inherent str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B22F3/105B33Y70/00B22F5/00B22F1/17
CPCB22F5/009B33Y70/00C22C1/0433Y02P10/25B22F1/17B22F10/28B22F12/44B22F12/13C22C19/00C22C27/04
Inventor C.布伦胡贝尔M.谢菲尔
Owner 西门子能源全球两合公司
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