Method for welding together two parts which are exposed to different temperatures, and turbomachine produced using a method of this type
US6753504B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2002 |
| Grant date | Jun 22, 2004 |
| Priority date | — |
| Expiry date | Mar 12, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K2101/001
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In a method for welding together two parts (12, 13), especially of a turbomachine, which are exposed to different temperatures, of which the first part (12) consists of a steel and the second part (13) consists of a nickel-base alloy which contains elements which are unfavorable for welding to steel, such as for example Nb, a crack-free welded joint is achieved by the fact that first of all an intermediate layer (18), in which the amount of unfavorable elements is progressively reduced from the inside outward, is applied to the joining surface (17) which is provided for the welding, and that then the second part (13), which has been provided with the intermediate layer (18), is welded to the first part (12).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.