Method of applying multiple materials with selective laser melting on a 3D article

Patent metadata

Field	Value
Publication number	US-9901983-B2
Application number	US-91592010-A
Country	US
Kind code	B2
Filing date	Oct 29, 2010
Priority date	Oct 30, 2009
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

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 ).

First claim

We claim:

1. A method for manufacturing an article formed of at least a first metallic powder material and a second material, in accordance with three-dimensional CAD data of a model of the article, including CAD cross-sectional data of said model, the method comprising forming the article by:
depositing layers of the first metallic powder material, including successively depositing several layers of the first metallic powder material one on top of the other, and heating each layer of first metallic powder material 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, said heating performed before depositing a next layer, wherein said heating comprises guiding the beam over each layer of first metallic 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;
directly applying at least one tape, sheet or foil, of the second material to the first material of the article, the second material being different from the material of the first metallic powder and the at least one tape, sheet or foil having a varying thickness over at least one of a width or length of the at least one tape, sheet, or foil; and
heating the second material with a focused laser or electron beam to a specified temperature such that the at least one tape, sheet or foil, 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 to form a new layer of second material on the article.

2. A method according to claim 1 , wherein:
heating the at least one tape, sheet, or foil, comprises heating the entire at least one tape, sheet, or foil; or
heating the at least one tape, sheet, or foil comprises applying the focused laser or electron beam only to a restricted area of the second material at least one tape, sheet, or foil, corresponding to a selected cross-sectional area of the model of the article, and subsequently removing non-irradiated parts of the second material of at least one tape, sheet, or foil.

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

4. A method according to claim 1 , wherein applying the at least one tape, sheet, or foil of a second material comprises applying a tape or a sheet having a thickness in the range of 200 μm-1.5 mm.

5. A method according to claim 1 , wherein applying the at least one tape, sheet, or foil, of a second material comprises applying a tape or a sheet having a thickness in the range of 0.5-1.0 mm.

6. A method according to claim 1 , wherein applying the at least one tape, sheet, or foil of a second material comprises applying a foil having a thickness in the range of 20-200 μm.

7. A method according to claim 1 , wherein applying the at least one tape, sheet, or foil of a second material comprises applying a foil having a thickness in the range of 20-100 μm.

8. A method according to claim 1 , wherein applying the at least one tape, sheet, or foil of a second material to the article comprises applying at least twice sequentially.

9. A method according to claim 1 , wherein:
applying the at least one tape, sheet, or foil 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 the at least one tape, sheet, or foil 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.

10. A method according to claim 9 , wherein the three-dimensional article comprises a single crystal or a directional solidified article.

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

12. A method according to claim 11 , wherein the gas turbine part is a blade, a vane, or a structural turbine part.

13. 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.

14. 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.

15. 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 composite thereof; or both.

16. A method according to claim 3 , wherein the hardface material is selected from the group consisting of boron nitride, chromium carbide, silicon carbide, and combinations or composites thereof.

17. A method for manufacturing an article formed of at least a first metallic powder material and a second material in accordance with three-dimensional CAD data of a model of the article, including CAD cross-sectional data of said model, the method comprising forming the article by:
depositing layers of the first metallic powder material, including successively depositing several layers of the first metallic powder material one on top of the other, and heating each layer of first metallic powder material 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, said heating performed before depositing a next layer, wherein said heating comprises guiding the beam over each layer of first metallic 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;
directly applying at least two tapes, sheets, or foils of the second material to the first metallic powder material of the article in a same layer, the second material being different from the material of the first metallic powder and at least one of the at least two tapes, sheets, or foils having a thickness of a width or length that varies from a thickness of a width or length of the other of the at least two tapes, sheets, or foils arranged in the same layer; and
heating the second material with a focused laser or electron beam to a specified temperature such that the at least two tapes, sheets, or foils 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 to form a new layer of second material on the article.

Assignees

• Hoevel Simone
• Stankowski Alexander
• Rickenbacher Lukas
• Ansaldo Energia Ip Uk Ltd

Inventors

• Hoevel Simone
• Stankowski Alexander
• Rickenbacher Lukas

Classifications

• B22F5/009 Primary

  of turbine components other than turbine blades (of turbine blades B22F5/04) · CPC title

• B22F10/43

  characterised by material · CPC title

• B22F10/28

  Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM] · CPC title

• B22F3/1055 Primary

  Operations & Transport · mapped topic

• B22F2999/00

  Aspects linked to processes or compositions used in powder metallurgy · CPC title