Anvil for friction stir welding high temperature materials
US7608296B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 13, 2006 |
| Grant date | Oct 27, 2009 |
| Priority date | — |
| Expiry date | Jun 5, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K20/126
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A friction stir welding anvil and method of producing a friction stir welding anvil that precludes diffusion or mechanical bonding of the anvil to the work pieces are provided. The alternatives for producing such an anvil comprise coating the anvil with diffusion barriers such as oxides, nitrides, intermetallics, and/or refractory metals; manufacturing an anvil either completely or partially from the same; or placing a coating of such materials in the form of a thin sheet or a powder between the anvil and the work pieces. The anvil disclosed herein exhibits high strength and hardness even at elevated temperatures, such as those greater than 800° C., so as to prevent the anvil from mechanically or diffusion bonding to the work pieces and so as to minimize, or eliminate altogether, anvil deformation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.