Method for producing semi-processed non-oriented electrical steel sheet having excellent magnetic properties
US9978488B2 · kind B2 · utility
2Cited by
7References
4Claims
0Family size
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Key dates
| Filing date | Nov 21, 2013 |
| Grant date | May 22, 2018 |
| Priority date | — |
| Expiry date | Dec 5, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F41/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A steel slab having a chemical composition including C: not more than 0.005 mass %, Si: not more than 4 mass %, Mn: 0.03-2 mass %, P: not more than 0.2 mass %, S: not more than 0.004 mass %, Al: not more than 2 mass %, N: not more than 0.004 mass %, Se: not more than 0.0010 mass % and the balance being Fe and inevitable impurities is subjected to hot rolling, cold rolling and recrystallization annealing up to 740° C. at an average heating rate of not less than 100° C./s to produce a semi-processed non-oriented electrical steel sheet being high in the magnetic flux density and low in the iron loss after stress relief annealing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.