METHOD OF APPLYING MULTIPLE MATERIALS WITH SELECTIVE LASER MELTING ON A 3D ARTICLE

• US 20110106290A1
• Filed: 10/29/2010
• Published: 05/05/2011
• Est. Priority Date: 10/30/2009
• Status: Active Grant

• Current Assignee: Ansaldo Energia IP UK Limited (Ansaldo Energia SPA)
• Original Assignee: Ansaldo Energia IP UK Limited (Ansaldo Energia SPA)
• Inventors: Rickenbacher, Lukas, HÖVEL, Simone, Stankowski, Alexander
• Granted Patent: US 9,901,983 B2
• Time in Patent Office: Days
• US Class Current: 700/120
• CPC Class Codes: B22F 10/28 Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
• CPC Class Codes: B22F 10/43 characterised by material
• CPC Class Codes: B22F 2999/00 Aspects linked to processes or compositions used in powder metallurgy
• CPC Class Codes: B22F 3/1035 Liquid phase sintering
• CPC Class Codes: B22F 5/009 of turbine components other than turbine blades of turbine blades B22F5/04
• CPC Class Codes: B22F 5/04 of turbine blades
• CPC Class Codes: B22F 7/062 involving the connection or repairing of preformed parts
• CPC Class Codes: B22F 7/08 with one or more parts not made from powder B22F7/062 takes precedence
• CPC Class Codes: Y02P 10/25 Process efficiency

Abstract

In a method for manufacturing an article (1), particularly a prototype of a product or component, a tool prototype or spare part, by using selected laser melting, for the application onto the article (1) of a layer (13) or portion of a second metallic material, which is different from the material of the first metallic powder (4), a tape (12), sheet (14), foil or three-dimensional pre-form (18) of a second material is applied to the article (1) and is heated by a focused laser or electron beam (6) to a specified temperature such that the tape (12), sheet (14), foil or pre-form, respectively, are made molten by the electron laser beam (6), wherein the focused beam (6) is applied to a given area corresponding to a selected cross-sectional area of the model of the article (1) under formation of a new layer or part made of second material integral with the article (1).

Claims

1. A method for manufacturing an article in accordance with three-dimensional CAD data of a model of a body, the method comprising:

depositing layers of a first metallic powder material, including successively depositing several layers of the first metallic powder one on top of the other, and heating each layer of first metallic powder to a specified temperature with a focused laser or electron beam applied to a given area corresponding to a selected cross-sectional area of the model of the article, said heating performed before depositing a next layer, wherein said heating comprises guiding the beam over each layer of powder material in accordance with the CAD cross-sectional data of the selected cross-sectional area of the model so that each layer of powder is fixed to the layer below;

applying a tape, sheet, foil, or three-dimensional pre-form of a second material to the article, the second material being different from the material of the first metallic powder; and

heating the second material with a focused laser or electron beam to a specified temperature such that the tape, sheet, foil, or pre-form is made molten by the laser or electron beam, wherein the focused beam is applied to a given area corresponding to a selected cross-sectional area of the model of the article under formation of a new layer or part made of second material integral with the article.

2. A method according to claim 1, wherein:

heating the tape, sheet, foil, or three-dimensional pre-form comprises heating the entire tape, sheet, foil, or three-dimensional pre-form of a second material;

or

heating the tape, sheet, foil, or three-dimensional pre-form comprises applying the focused laser or electron beam only to a restricted area of the second material tape, sheet, foil, or three-dimensional pre-form corresponding to a selected cross-sectional area of the model of the article, and subsequently removing non-irradiated parts of the second material tape, sheet, foil, or three-dimensional pre-form.

3. A method according to claim 1, wherein the material of the first metallic powder is selected from the group consisting of nickel base alloy, cobalt base alloy, titanium base alloy, steel, and combinations thereof.

4. A method according to claim 1, wherein the second material is selected from the group consisting of nickel base alloy, cobalt base alloy, titanium base alloy, steel, and combinations thereof.

5. A method according to claim 1, wherein:

the second material is an abradable material selected from the group consisting of ceramics, abradable metallic materials, and combinations or composites thereof;

or

the second material is an abrasive material selected from the group consisting of ceramics, abrasive metallic materials, and combinations or composites thereof;

or

both.

6. A method according to claim 1, wherein the second material comprises hardface material.

7. A method according to claim 6, wherein the hardface material is selected from the group consisting of boron nitride, chromium carbide, silicon carbide, and combinations or composites thereof.

8. A method according to claim 1, wherein applying a tape, sheet, foil, or three-dimensional pre-form of a second material comprises applying a tape or a sheet having a thickness in the range of 200 μ

m-1.5 mm.

9. A method according to claim 1, wherein applying a tape, sheet, foil, or three-dimensional pre-form of a second material comprises applying a tape or a sheet having a thickness in the range of 0.5-1.0 mm.

10. A method according to claim 1, wherein applying a tape, sheet, foil, or three-dimensional pre-form of a second material comprises applying a foil having a thickness in the range of 20-200 μ

m.

11. A method according to claim 1, wherein applying a tape, sheet, foil, or three-dimensional pre-form of a second material comprises applying a foil having a thickness in the range of 20-100 μ

m.

12. A method according to claim 1, wherein applying a tape, sheet, foil, or three-dimensional pre-form of a second material to the article comprises applying at least twice sequentially.

13. A method according to claim 1, wherein:

applying a tape, sheet, foil, or three-dimensional pre-form of a second material to the article comprises applying on the article on a flat contact face, on three-dimensionally structured contact faces, on edges, within the article, or combinations thereof; and

applying a tape, sheet, foil, or three-dimensional pre-form of a second material to the article comprises applying the second material to contact faces to increase the weld-ability, to facilitate joining to another three-dimensional article, or both.

14. A method according to claim 13, wherein the three-dimensional article comprises a single crystal or a directional solidified article.

15. A method according to claim 1, wherein applying a tape, sheet, foil, or three-dimensional pre-form of a second material to the article comprises applying a pre-form having a three-dimensional shape adapted to a contact face of the article at a place where the pre-form is to be applied.

16. A method according to claim 15, wherein the three-dimensional shape is complementary to the contact face of the article at the place where the pre-form is to be applied.

17. A method according to claim 1, wherein the article is a gas turbine part.

18. A method according to claim 1, wherein the gas turbine part is a blade, a vane, or a structural turbine part.

19. A gas turbine part made using a method according to claim 1.

20. A gas turbine part according to claim 19, wherein the part is a blade, a vane, or a structural turbine part.