SOFT MAGNETIC STEEL MATERIAL HAVING EXCELLENT MAGNETIC PROPERTY, STABILITY THEREOF AND COLD FORGEABILITY, SOFT MAGNETIC STEEL COMPONENT HAVING EXCELLENT MAGNETIC PROPERTY AND STABILITY THEREOF AND THEIR PRODUCTION METHOD

Title:

Document Type and Number:

Japanese Patent JP2007238970

Kind Code:

A

Abstract:

To provide a soft magnetic steel material which can secure stable and excellent magnetic properties after magnetic annealing, and can be worked with high dimensional precision by cold forging.

The soft magnetic steel material has a composition containing prescribed components, and the balance Fe with inevitable impurities, and satisfying 0.8<([B]/[N])<5.0, wherein [B] denotes a B content(mass%) in the steel and [N] denotes an N content(mass%) in the steel, and has a metallic structure composed of a ferrite single phase structure, and BN having the average grain diameter (the average value of the short diameter and the long diameter) satisfying 0.1 to 2 μm is precipitated by 120 to 500 pieces/mm2in the crystal grains of the ferrite structure.

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Inventors:

CHIBA MASAMICHI

Application Number:

JP2006059492A

Publication Date:

September 20, 2007

Filing Date:

March 06, 2006

Export Citation:

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Assignee:

KOBE STEEL LTD

International Classes:

C22C38/00; C21D8/12; C21D9/00; C22C38/14

Domestic Patent References:

JPH0827520A	1996-01-30
JPH1150149A	1999-02-23
JPH0790505A	1995-04-04
JP2004143496A	2004-05-20

Attorney, Agent or Firm:

Kyuichi Ueki
Tadashi Sugakawa
Osamu Futakuchi
Hiroaki Ito

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