Fe-based rapidly quenched metal strip
US6060172A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1998 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | Apr 10, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12146
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to a rapidly quenched metal strip used as a core material for transformers, magnetic shields, choke coils, etc., and to an Fe-based rapidly quenched metal strip having a strip thickness exceeding 20 .mu.m and up to 70 .mu.m, wherein nonmetallic inclusions contained in said metal strip have a maximum particle size up to 50% of the strip thickness, and densities of the nonmetallic inclusions are up to 10 nonmetallic inclusions/mm.sup.3 for nonmetallic inclusions having a particle size exceeding 10 .mu.m and up to 50% of the strip thickness, up to 3.times.10.sup.3 nonmetallic inclusions/mm.sup.3 for nonmetallic inclusions having a particle size of at least 3 .mu.m to up to 10 .mu.m, and up to 5.times.10.sup.5 nonmetallic inclusions/mm.sup.3 for nonmetallic inclusions having a particle size of at least 0.3 .mu.m to less than 3 .mu.m, and showing the following average value <.epsilon..sub.f > of a bending fracture strain .epsilon..sub.f, being bent with the free surface of the film strip placed outside: EQU <.epsilon..sub.f >=0.8-1.0 and the standard deviation .sigma. of the bending fracture strain .epsilon..sub.f is up to 50% of <.epsilon..sub.f >, wherein…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.