Apparatus for applying metal coatings to a metal substrate
US4099481A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1976 |
| Grant date | Jul 11, 1978 |
| Priority date | — |
| Expiry date | Sep 30, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C4/129
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The apparatus of the invention employs a gas torch which has the feature of selective addition of metal powder to the gas flow. In use, the torch is caused to make a continuous succession of traverses of a workpiece region for preheating purposes and then, without interrupting the continuous operation of either the torch or the traversing cycles, a controlled flow of metal powder is caused to enter the torch flow, enabling the bonding and progressive building of a metal coat to desired thickness. In the embodiments described, first and second different metal powders are thus successively coated to the substrate without interrupting the continuous operation. Different embodiments are described in the particular context of applying uniform circumferential coatings to a cylindrical workpiece such as a shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.