Method, device and powder for the additive manufacturing of a component with oxide dispersion strengthening and corresponding component

Patent metadata

Field	Value
Publication number	US-2021094101-A1
Application number	US-201917044820-A
Country	US
Kind code	A1
Filing date	Apr 17, 2019
Priority date	May 9, 2018
Publication date	Apr 1, 2021
Grant date	—

Abstract

A method for the additive manufacturing of a component includes providing a powdered base material for a component, in particular a component for the hot gas path of a gas turbine, building up the component layer by layer on a building platform by fusing individual layers of the base material, and introducing an oxide dispersion strengthening into a region of the component to be additively manufactured by an oxidic additive, wherein the region is usually exposed to high thermomechanical loading during operation of the component.

First claim

1 . A process for additive manufacture of a component, comprising:
providing a pulverulent base material for the component, layerwise building up of the component on a building platform by solidification of individual layers of the base material, and introducing oxidic dispersion strengthening into a region of the additively manufactured component by an oxidic additive, where the region is usually subjected to high thermomechanical stress during operation of the component.

2 . The process as claimed in claim 1 ,
wherein the base material comprises one of the following materials: PWA795, Mer172, MAR-509, Stellite-31, Hastelloy X, Haynes 230, Haynes 625, IN939, IN738, IN713, IN792, IN718, Alloy 247 and Rene 80.

3 . The process as claimed in claim 1 ,
wherein the component is a turbine blade and the region describes a surface region of the turbine blade, and/or a trailing edge of the turbine blade.

4 . The process as claimed in claim 1 ,
wherein the introducing of the oxidic dispersion strengthening is carried out layerwise, by the component being built up at least partially layerwise alternately from the base material and a mixture of the base material and the oxidic additive for formation of the oxidic dispersion strengthening.

5 . The process as claimed in claim 1 ,
wherein the region is a surface region and a subregion of the component located underneath or in an interior is firstly built up from the base material and the region is subsequently built up from a mixture of the base material and the oxidic additive for formation of the oxidic dispersion strengthening.

6 . The process as claimed in claim 1 , further comprising:
preventing excessive agglomeration or flotation of the oxidic additive during the layerwise building up of the component by shortened energy inputs and/or increased cooling rates.

7 . The process as claimed in claim 1 , further comprising:
layerwise forming of oriented recrystallization along a longitudinal axis of the region, by renewed remelting of a previously solidified component layer and/or by means of a thermal treatment.

8 . A component which can be produced or has been produced by the process as claimed in claim 1 , comprising:
an oxide dispersion strengthened region and a further region composed of a weldable nickel- or cobalt-based superalloy.

9 . The component as claimed in claim 8 , further comprising:
a single-crystal or directionally solidified or columnar grain or crystal structure having a grain aspect ratio of at least 10:1 along a longitudinal axis, and/or of a trailing edge, of the oxide dispersion strengthened region.

10 . A powder for additive manufacture, and/or for selective laser melting, comprising:
a pulverulent base material composed of a nickel- or cobalt-based superalloy and an oxidic additive which is present, in the base material and is suitable for forming oxidic dispersion strengthening in the region of the component during additive manufacture by the process as claimed in claim 1 .

11 . The powder as claimed in claim 10 ,
wherein the oxidic additive comprises yttrium oxide or hafnium oxide as nanoparticles in a concentration in the range from 0.5 to 2 percent by volume (% by volume).

12 . The powder as claimed in claim 10 ,
wherein the oxidic additive comprises hafnium (Hf), tantalum (Ta), zirconium (Zr), titanium (Ti) or elements from the group of the lanthanides as oxide formers.

13 . An apparatus for the additive manufacture of a component by the process as claimed in claim 1 , comprising:
first means for applying a first pulverulent material, and second means for applying a second pulverulent material which is different from the first material, wherein the apparatus is additionally configured for preventing mixing of the first material and the second material in corresponding stock vessels for the materials before the layerwise building up of the component.

14 . The process as claimed in claim 1 ,
wherein the component comprises a component for a hot gas path of a gas turbine.

15 . The powder as claimed in claim 10 ,
wherein the oxidic additive is homogeneously distributed.

16 . The apparatus as claimed in claim 13 ,
wherein the first pulverulent material comprises the base material, and wherein the second pulverulent material comprises the oxidic additive.

Assignees

• Siemens Ag

Inventors

• Farahbod-Sternahl Lena
• Felsmann Christian
• Glass Dennis
• Grodzki Jacek
• Herfurth Robert
• Hoefener Lars
• Hornung Bernd
• Rule David
• Rühmer Tobias Thomas
• Thomas Eric

Classifications

• B22F10/50 Primary

  Treatment of workpieces or articles during build-up, e.g. treatments applied to fused layers during build-up · CPC title

• B22F5/04 Primary

  of turbine blades · CPC title

• B22F10/64

  by thermal means (control of energy beam parameters for post heating B22F10/364) · CPC title

• B22F10/38

  to achieve specific product aspects, e.g. surface smoothness, density, porosity or hollow structures · CPC title

• B22F10/364

  for post-heating, e.g. remelting · CPC title