Non-oriented electrical steel sheets with improved magnetic property and method for manufacturing the same
US7763122B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2006 |
| Grant date | Jul 27, 2010 |
| Priority date | — |
| Expiry date | Feb 8, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C38/16
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to a non-oriented electrical steel sheet, widely used as an iron core in electric devices, and to a method of manufacturing the same. The non-oriented electrical sheet includes 0.004 wt. % or less C; 1.0-3.5 wt. % Si; 0.02 wt. % or less P; 0.001 wt. % or less S; 0.2˜2.5 wt. % Al; 0.003 wt. % or less N; 0.004 wt. % or less Ti; Mn, in which the amount thereof is represented by the following formula (1): 0.10+100×S(wt. %)≦Mn(wt. %)≦0.21+200×S(wt. %)—(1); a balance of iron; and inevitable impurities. Final magnetic properties are greatly improved because fine precipitates are formed by S, the amount of Mn can be suitably determined in order to inhibit the formation of the fine precipitates, the formation of fine precipitate CuS is inhibited because precipitates CuS, MnS are formed by adding Sn, Ni and Cu, and a texture, which determines a temperature of annealing a hot rolled steel plate and magnetic properties, is controlled, thereby manufacturing an inexpensive and optimum non-oriented electrical steel sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.