Method for producing thin steel sheet of high magnetic permeability
US4832762A · kind A · utility
5Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 3, 1986 |
| Grant date | May 23, 1989 |
| Priority date | — |
| Expiry date | Mar 3, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/14775
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An ordinarily made thin steel sheet is placed in an atmosphere bearing SiCl.sub.4, and subjecting to Si penetrating treatment at temperatures between 1100.degree. C. and 1200.degree. C. for a determined period of time. A heating rate is used which is more than 50.degree. C./sec at the temperatures of more than 1000.degree. C. in the SiCl.sub.4 atmosphere. Thereby, it is possible to manufacture thin steel sheet of high magnetic permeability without internal defects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.