Method of bonding hard metal objects with braze slurry
US5263641A · kind A · utility
9Cited by
13References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1992 |
| Grant date | Nov 23, 1993 |
| Priority date | — |
| Expiry date | Nov 4, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K35/36
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A braze paste is disclosed for brazing superalloys together which includes an organic binding system, a major amount of a nickel, cobalt, gold, silver, copper or palladium based braze alloy and ground polytetrafluoroethylene. The braze paste can be used to braze superalloys together without prior nickel treatment. In the brazing step, the polytetrafluoroethylene decomposes and forms fluoride ions which in turn acts on any oxide that may form during the brazing step to remove the oxide and permit a good braze between the metal objects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.