| US 7,513,959 B2 | ||
| Non-oriented electrical steel sheet and method for manufacturing the same | ||
| Minoru Takashima, Tokyo (Japan); Masaaki Kohno, Tokyo (Japan); Katsumi Yamada, Tokyo (Japan); Masaki Kawano, Tokyo (Japan); and Kaoru Sato, Tokyo (Japan) | ||
| Assigned to JFE Steel Corporation, (Japan) | ||
| Appl. No. 10/537,194 PCT Filed Dec. 03, 2003, PCT No. PCT/JP03/15462 § 371(c)(1), (2), (4) Date Jun. 22, 2005, PCT Pub. No. WO2004/050934, PCT Pub. Date Jun. 17, 2004. |
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| Claims priority of application No. 2002-353250 (JP), filed on Dec. 05, 2002; application No. 2003-095737 (JP), filed on Mar. 31, 2003; and application No. 2003-095881 (JP), filed on Mar. 31, 2003. | ||
| Prior Publication US 2006/0124207 A1, Jun. 15, 2006 | ||
| Int. Cl. H01F 1/147 (2006.01) | ||
| U.S. Cl. 148—307 [148/306; 148/111; 148/120] | 12 Claims |
| 1. A non-oriented electrical steel sheet comprising: on a mass percent basis,
C: 0.02% or less;
Si: 4.5% or less;
Mn: 3% or less;
Al: 3% or less;
P: 0.5% or less;
Ni: 5% or less; and
Cu: 0.2% to 4%,
wherein a volume ratio of Cu precipitates in crystal grain interior is in the range of from 0.2% to 2%, and
an average particle size of the Cu precipitates is in the range of from 1 to 20 nm.
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