Joining of metal surfaces
US3951328A · kind A · utility
66Cited by
3References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 6, 1975 |
| Grant date | Apr 20, 1976 |
| Priority date | — |
| Expiry date | Oct 6, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K35/3605
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
In methods of joining metal surfaces involving heating to a temperature above about 560.degree.C, the use of a flux comprising a mixture of potassium fluoaluminates. Particularly for brazing aluminum, a flux consisting essentially of potassium fluoaluminate complexes (e.g. KAlF.sub.4 and K.sub.3 AlF.sub.6) may be employed, having a composition corresponding to an AlF.sub.3 /KF ratio, in parts by weight, between about 65:35 and about 45:55. The flux is essentially free of unreacted potassium fluoride and may be in divided solid form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.