Method of processing tubing
US4671826A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 2, 1985 |
| Grant date | Jun 9, 1987 |
| Priority date | — |
| Expiry date | Aug 2, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E30/30
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A zirconium alloy fuel cladding tube is provided, having a uniform composition throughout and an outer annular microstructural layer in a cold worked and stress relieved condition over an inner annular microstructural layer in an essentially fully recrystallized condition. Also described is a method of producing this tubing. This method utilizes an intermediate annealing step in which cold worked tubing is nonuniformly annealed to produce an outer annular layer of essentially fully recrystallized material over an inner layer of cold worked and stress relieved material. Subsequently the nonuniformly annealed material is cold worked and then uniformly annealed to produce the fuel cladding tube described above.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.