Nickel base brazing alloy and method
US4713217A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 4, 1984 |
| Grant date | Dec 15, 1987 |
| Priority date | — |
| Expiry date | Jun 4, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K35/304
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A nickel base brazing alloy, particularly suitable for diffusion brazing of superalloys, including gamma prime nickel base superalloys. The improved brazing alloy consists essentially of the following in weight percent: 12 to 14% chromium, 1 to 3.5% boron, 1.5 to 5% iron, less than 0.06% carbon, and the balance nickel. The brazing alloy and method of this invention is able to fill gaps in the brazed joint up to 0.02 inches, without adversely affecting the joint microstructure. The resultant microstructure of the brazed joint exhibits minorsecondary phase of ultrafine spherical secondary precipitates, in a predominant solid solution matrix resulting in improved ductility, high temperature oxidation and sulfidation resistance and elimination of the requirement for pressure brazing fixtures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.