Welding of aluminized components and an aluminized component

Patent metadata

Field	Value
Publication number	US-9586292-B2
Application number	US-201414888461-A
Country	US
Kind code	B2
Filing date	Apr 22, 2014
Priority date	May 8, 2013
Publication date	Mar 7, 2017
Grant date	Mar 7, 2017

Abstract

The welding can be carried out only after the partial removal of a necessary aluminized portion prior to welding an aluminized component.

First claim

The invention claimed is:

1. A method for repairing a component having a substrate, the method comprising:
aluminizing the substrate, which produces a diffusion layer within the substrate and generates a build-up layer on the diffusion layer;
removing only a part of the build-up layer, such that a region of a surface of the diffusion layer is exposed and a remnant of the build-up layer remains on the diffusion layer adjacent the exposed region of the diffusion layer;
providing a weld to the region of the diffusion layer that is exposed next to the remnant of the build-up layer; and
retaining the remnant of the build-up layer adjacent the weld after providing the weld.

2. The method as claimed in claim 1 , wherein the substrate is a steel.

3. The method as claimed in claim 1 , wherein the substrate is only partially aluminized.

4. The method as claimed in claim 1 , wherein the build-up layer is removed only locally from the surface.

5. The method as claimed in claim 1 , wherein a material used to provide the is steel.

6. The method as claimed in claim 1 , wherein the substrate of the component is aluminized prior to providing a weld.

7. A component comprising:
an aluminized substrate, the aluminized substrate comprising a substrate that is aluminized, resulting in a diffusion layer within the aluminized substrate;
a build-up layer disposed on the diffusion layer, the build-up layer resulting from the aluminizing of the substrate, wherein, a portion of the build-up layer is removed to retain a remnant of the build-up layer located on the diffusion layer, the removal of the portion of the build-up layer exposing a surface of the diffusion layer; and
a weld provided on the surface of the diffusion layer that was exposed by the removal, the weld being adjacent the remnant of the build-up layer after a welding step is performed to the component.

8. The component as claimed in claim 7 , wherein the substrate of the component is aluminized prior to welding.

9. The component as claimed in claim 7 , which is a repaired component.

10. The component as claimed in claim 7 , wherein the weld is present directly on the diffusion layer.

11. The method as claimed in claim 1 , wherein the substrate is molybdenum-containing steel.

12. The method as claimed in claim 1 , wherein the substrate is made of 16Mo3.

13. The method as claimed in claim 1 , wherein the build-up layer is locally entirely removed.

14. The method as claimed in claim 1 , wherein the build-up layer is entirely removed.

Assignees

• Siemens Ag

Inventors

• Seipold Frank
• Sperlich Kathrin

Classifications

• B23K26/34

  Laser welding for purposes other than joining · CPC title

• B23P6/00

  Restoring or reconditioning objects (straightening or restoring form of sheet metal, metal rods, metal tubes, metal profiles, or specific articles made therefrom B21D1/00, B21D3/00; repairing defective or damaged objects by casting techniques B22D19/10) · CPC title

• F23R2900/00019

  Repairing or maintaining combustion chamber liners or subparts · CPC title

• F01D5/005

  Repairing methods or devices · CPC title

• B23P6/007

  using only additive methods, e.g. build-up welding · CPC title