Process for manufacturing a strip made of an Fe-Ni alloy
US6605163B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2001 |
| Grant date | Aug 12, 2003 |
| Priority date | — |
| Expiry date | Aug 27, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/0733
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Process for manufacturing a strip made of an Fe—Ni alloy of the “&ggr;′ and/or &ggr;″ structural hardening” type, the thermal expansion coefficient between 20° C. and 150° C. of which is less than 7×10−6/K, in which a hot strip is manufactured either by hot rolling a semi-finished product or by direct casting of a thin strip which is optionally lightly hot-rolled, and the hot strip is subjected to a softening annealing operation consisting of a soak between 950° C. and 1200° C. followed by rapid cooling and optionally a pickling operation, in order to obtain a softened strip; a cold-worked strip is manufactured by cold rolling the said softened strip, with a reduction ratio of greater than 5%; and the cold-worked strip is subjected to a recrystallization annealing operation in an inert or reducing atmosphere, carried out either on the run with a residence time between 900° C. and 1200° C. of between 30 s and 5 min, or statically with a soak at a temperature of between 900° C. and 1050° C. for a time of between 15 min to 5 h, followed by cooling down to a temperature below 500° C. at a cooling rate suffici…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.