Manufacturing method of delayed hydride cracking resistant seamless pressure tube made of zirconium (Zr) alloy
US5681406A · kind A · utility
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5References
6Claims
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Key dates
| Filing date | May 25, 1994 |
| Grant date | Oct 28, 1997 |
| Priority date | — |
| Expiry date | May 25, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21B3/00
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method for manufacturing a delayed hydride cracking resistant zirconium ahoy (Zircaloy-2, Zircaloy-4, Zr-2.5% Nb, pure Zr, etc.) pressure tube includes the steps of making a seamless pressure tube having a diameter smaller than the final size by extrusion or drawing, and then expanding the tube at a temperature below 600.degree. C. by cross rolling.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.