Process for joining component workpieces made of a superalloy employing the diffusion bonding process
US4676843A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 20, 1985 |
| Grant date | Jun 30, 1987 |
| Priority date | — |
| Expiry date | Feb 20, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49318
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Two component workpieces (1, 3) consisting of different superalloys or of the same superalloy are bonded together to form a monolithic whole, with the insertion of a layer 1-2 mm thick consisting of a powder (4) of composition similar to or identical to that of the component workpieces (1, 3), by hot pressing in accordance with the diffusion bonding process. The workpiece surfaces to be bonded do not have to have narrow tolerances, but are with advantage provided with grooves (5). The groove depth (s) may be 0.25 mm. Pressing temperature =950.degree.-1,000.degree. C., deformation velocity .epsilon.=1-5.10.sup.-1 s.sup.-1, degree of deformation .epsilon.=0.1-0.02. The process is suitable for the bonding together of component workpieces (1) consisting of a dispersion-hardened, nickel-based superalloy or of component workpieces (1) of such an alloy and workpieces (3) consisting of a cast conventional superalloy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.