Title:
NONORIENTED MAGNETIC STEEL SHEET, MEMBER FOR ROTARY MACHINE AND ROTARY MACHINE
Document Type and Number:
WIPO Patent Application WO/2004/013365
Kind Code:
A1
Abstract:
A nonoriented magnetic steel sheet which has a chemical composition in mass % wherein contents of Si and Mn are 0.1 to 1.2 % and 0.005 to 0.30 %, respectively, and the contents of C, Sol.Al and N are limited to 0.0050 % or less, 0.0004 % or less, and 0.0030 % or less, respectively, all including 0 %, and has a number density of grain growth inhibiting ductile non-metallic inclusions dispersed in the steel sheet of 1000 pieces/cm2 or less including 0, wherein a grain growth inhibiting ductile non-metallic inclusion means an inclusion contained in a steel sheet having been subjected to finishing annealing which has a length of 3 × D to 9 × D, D representing an average particle diameter of re-crystallized grains in the steel sheet. The nonoriented magnetic steel sheet allows the production, from one steel sheet, of a rotor material exhibiting a high magnetic flux density and a high strength and a stator material exhibiting a high magnetic flux density and a low iron loss after it is subjected to strain removing annealing.
Inventors:
NAKANISHI TADASHI (JP)
TAKAMIYA TISHITO (JP)
KAWANO MASAKI (JP)
TAKAMIYA TISHITO (JP)
KAWANO MASAKI (JP)
Application Number:
PCT/JP2003/009947
Publication Date:
February 12, 2004
Filing Date:
August 05, 2003
Export Citation:
Assignee:
JFE STEEL CORP (JP)
NAKANISHI TADASHI (JP)
TAKAMIYA TISHITO (JP)
KAWANO MASAKI (JP)
NAKANISHI TADASHI (JP)
TAKAMIYA TISHITO (JP)
KAWANO MASAKI (JP)
International Classes:
B21B3/02; C21D8/12; C22C38/00; C22C38/02; C22C38/04; C22C38/06; C22C38/12; C22C38/14; C22C38/60; H01F1/16; H02K1/02; (IPC1-7): C22C38/00; C22C38/06; C22C38/60; C21D8/12; B21B3/02; H01F1/16; H02K1/02
Foreign References:
| JP2002206114A | 2002-07-26 | |||
| JPH08269532A | 1996-10-15 | |||
| JPH09263908A | 1997-10-07 | |||
| JP2001011589A | 2001-01-16 | |||
| JPH10212555A | 1998-08-11 | |||
| JP7116510B2 | 2022-08-10 |
Attorney, Agent or Firm:
Ochiai, Kenichiro c/o Intellectual, Property Dept (JFE STEEL CORPORATION 2-3, Uchisaiwaicho 2-chom, Chiyoda-ku Tokyo, JP)
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