Method of eliminating unevenness in pass-reversal thermal spraying
US5922412A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1998 |
| Grant date | Jul 13, 1999 |
| Priority date | — |
| Expiry date | Mar 26, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B13/0636
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of eliminating unevenness in pass-reversal thermal spraying of a substrate surface by: uniformly thermally spraying a substrate surface by moving a wire fed arc spray gun along the length of the substrate surface at constant spray parameters while using a first wire feed rate and a first current level for the gun's power supply; (b) when said spray gun approaches an end zone of the pass length requiring reversal of spray gun movement, reducing the wire feed rate and current by up to about 25% until the spray gun has completed such reversal and has exited from said end zone in the opposite direction; (c) while still continuing thermal spraying, restoring the wire feed rage and current to said first levels; and (d) repeating steps (b) and (c) as the spray gun approaches other or repeated end zones of the substrate length during repeated passes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.