Method and structure for welding an air-sensitive metal in air
US6874676B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 6, 2002 |
| Grant date | Apr 5, 2005 |
| Priority date | — |
| Expiry date | May 6, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K35/3605
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method and structure for welding an air-sensitive metal, such as titanium, in an ambient environment containing air. The method (10) includes forming a weld (12) through a weld-through coating (14) applied to the weld face(s) (28) and heat-affected zone (30) of one or more workpiece(s) (16) to be welded. The weld-through coating may contain a reactive material that comprises one or more halogenides of alkali metal, e.g., fluorides of barium, calcium, and strontium. The weld-through coating may be applied to the workpiece using a thermal-spray process, such as a plasma-spray process (32), prior to forming the weld. The weld-through coating may be applied to the workpiece(s) generally contemporaneously with the formation of the weld just ahead of the weld or may be applied at any time prior to forming the weld.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.