Title:
IRON POWDER FOR DUST CORES
Document Type and Number:
WIPO Patent Application WO/2014/097556
Kind Code:
A1
Abstract:
According to the present invention, an iron powder for dust cores, which has excellent compressibility and low iron loss after molding, can be obtained by setting the Si content thereof to 0.01 mass% or less, the apparent density thereof to 3.8 g/cm3 or more, the ratio of iron particles having a diameter of 45 μm or less to 10 mass% or less, the ratio of iron particles having a diameter of more than 180 μm but 250 μm or less to less than 30 mass%, the ratio of iron particles having a diameter of more than 250 μm to 10 mass% or less, and the Vickers hardness (test force: 0.245 N) in a particle cross-section to 80Hv or less.
Inventors:
TAKASHITA TAKUYA (JP)
NAKAMURA NAOMICHI (JP)
NAKAMURA NAOMICHI (JP)
Application Number:
PCT/JP2013/007055
Publication Date:
June 26, 2014
Filing Date:
December 02, 2013
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B22F1/052; B22F1/08; B22F1/102; C22C38/00; H01F1/14; H01F1/20; H01F27/24
Domestic Patent References:
| WO2008093430A1 | 2008-08-07 |
Foreign References:
| JP2007194273A | 2007-08-02 | |||
| JP2007092162A | 2007-04-12 | |||
| JP2005187918A | 2005-07-14 | |||
| JP2002317204A | 2002-10-31 | |||
| JPH062007A | 1994-01-11 |
Attorney, Agent or Firm:
SUGIMURA, KENJI (JP)
Kenji Sugimura (JP)
Kenji Sugimura (JP)
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