公开(公告)号：CA2827907A1

公开(公告)日：2012-09-27

申请号：CA2827907

申请日：2011-12-15

Applicant: JFE STEEL CORP

Inventor： SAKAGUCHI YASUHIKO ,  MAETANI TOSHIO

IPC: B22F1/00 ,  F27B9/04

Abstract: A method and an apparatus for finish heat treatment of an iron powder are provided, with which it is possible to produce, with high productivity, an iron powder product having impurity concentrations within objective ranges regardless of the impurity concentrations of the crude iron powder. The method comprises: placing a crude iron powder on a continuous moving bed to continuously introduce the crude iron powder into the apparatus for finish heat treatment; firstly subjecting the crude iron powder in a pretreatment zone to a pretreatment in which the powder is heated to a temperature in the range of 450-1,100ºC in a hydrogen gas and/or inert gas atmosphere; and then subjecting the pretreated powder to at least two of decarburization, deoxidation, and denitrification treatments in a decarburization zone, a deoxidation zone, and a denitrification zone. In the pretreatment zone, hydrogen gas and/or an inert gas is introduced as an ambient gas, separately from the ambient gas for use in the at least two treatments, into the upstream-side part of the pretreatment zone and discharged from the downstream-side part thereof so that the ambient gas flows in the same direction as the moving direction of the continuous moving bed.

公开(公告)号：SE0303372D0

公开(公告)日：2003-12-16

申请号：SE0303372

申请日：2003-12-16

Applicant: JFE STEEL CORP

Inventor： UETA MASATERU ,  NAKAMURA NAOMICHI ,  MAETANI TOSHIO ,  UENOSONO SATOSHI

IPC: B22F1/02 ,  H01F1/06 ,  H01F1/147 ,  H01F1/153 ,  H01F1/24 ,  H01F

Abstract: This invention provides a metal powder for powder magnetic cores, which have good insulation performance and high magnetic flux density, and which is favorable for motor cores. Ferromagnetic metal powder may be coated with a coating material and a phosphate or phosphoric acid compound containing aluminum is used for the coating material. Coating the surface of iron powder with aluminum phosphate realizes to produce high-quality powder magnetic cores that have good insulation performance and high magnetic flux density and are favorable for motor cores. Further coating the aluminum phosphate-coated metal powder with silane compound or surfactant realizes more stable compressed shaped articles of the powder. And the properties of the articles do not fluctuate while stored for, so long as they are resistant to moisture. This invention contributes to producing powder magnetic cores for motors, and to the process for powder magnetic cores, furthermore, to the related art field.

公开(公告)号：CA2911031C

公开(公告)日：2018-01-16

申请号：CA2911031

申请日：2014-04-25

Applicant: JFE STEEL CORP

Inventor： MAETANI TOSHIO ,  UNAMI SHIGERU

IPC: B22F1/02 ,  B22F1/00 ,  C22C33/02 ,  C22C38/00 ,  C22C38/12 ,  C22C38/16

Abstract: Provided is an alloy steel powder for powder metallurgy containing an iron-based powder as a main component that is capable of achieving both high strength and high toughness in a sintered body using the same. In the alloy steel powder, the iron-based powder contains a reduced powder, and Mo content with respect to a total amount of the alloy steel powder is 0.2 mass% to 1.5 mass%, Cu powder content with respect to a total amount of the alloy steel powder is 0.5 mass% to 4.0 mass% and graphite powder content with respect to a total amount of the alloy steel powder is 0.1 mass% to 1.0 mass%.

公开(公告)号：SE1551574A1

公开(公告)日：2015-12-02

申请号：SE1551574

申请日：2014-04-25

Applicant: JFE STEEL CORP

Inventor： MAETANI TOSHIO ,  UNAMI SHIGERU

IPC: B22F1/00 ,  B22F1/02 ,  C22C33/02 ,  C22C38/00 ,  C22C38/12 ,  C22C38/16

公开(公告)号：CA2667843C

公开(公告)日：2012-04-10

申请号：CA2667843

申请日：2007-01-30

Applicant: JFE STEEL CORP

Inventor： MAETANI TOSHIO ,  UENOSONO SATOSHI ,  UETA MASATERU

IPC: B22F1/00 ,  B22F3/00 ,  B22F9/08 ,  C22C38/00 ,  C22C38/04 ,  H01F1/24

Abstract: High compressibility iron powder that is suitably used for parts with excellent magnetic characteristics or high density sintered parts and that has good productivity is provided from pure iron powder which includes, as impurities in percent by mass, C: 0.005% or less, Si: more than 0.01% and 0.03% or less, Mn: 0.03% or more and 0.07% or less, P: 0.01% or less, S: 0.01% or less, 0: 0.10% or less, and N: 0.001% or less, and whose particle includes four or less crystal grains on average and has a micro Vickers hardness (Hv) of 80 or less on average. The circularity of the iron powder is preferably 0.7 or more.

公开(公告)号：SE0303372L

公开(公告)日：2004-06-27

申请号：SE0303372

申请日：2003-12-16

Applicant: JFE STEEL CORP

Inventor： UETA MASATERU ,  NAKAMURA NAOMICHI ,  MAETANI TOSHIO ,  UENOSONO SATOSHI

IPC: B22F1/02 ,  H01F1/06 ,  H01F1/147 ,  H01F1/153 ,  H01F1/24

Abstract: This invention provides a metal powder for powder magnetic cores, which have good insulation performance and high magnetic flux density, and which is favorable for motor cores. Ferromagnetic metal powder may be coated with a coating material and a phosphate or phosphoric acid compound containing aluminum is used for the coating material. Coating the surface of iron powder with aluminum phosphate realizes to produce high-quality powder magnetic cores that have good insulation performance and high magnetic flux density and are favorable for motor cores. Further coating the aluminum phosphate-coated metal powder with silane compound or surfactant realizes more stable compressed shaped articles of the powder. And the properties of the articles do not fluctuate while stored for, so long as they are resistant to moisture. This invention contributes to producing powder magnetic cores for motors, and to the process for powder magnetic cores, furthermore, to the related art field.

公开(公告)号：SE0303372A

公开(公告)日：2004-06-27

申请号：SE0303372

申请日：2003-12-16

Applicant: JFE STEEL CORP

Inventor： UETA MASATERU ,  NAKAMURA NAOMICHI ,  MAETANI TOSHIO ,  UENOSONO SATOSHI

IPC: B22F1/02 ,  H01F1/06 ,  H01F1/147 ,  H01F1/153 ,  H01F1/24

CPC classification number: B22F1/02 ,  H01F1/061 ,  H01F1/1475 ,  H01F1/14766 ,  H01F1/15308 ,  H01F1/24 ,  Y10T428/12028 ,  Y10T428/12181

公开(公告)号：CA2968321C

公开(公告)日：2020-06-02

申请号：CA2968321

申请日：2015-11-24

Applicant: JFE STEEL CORP

Inventor： TAKASHITA TAKUYA ,  KOBAYASHI AKIO ,  NAKAMURA NAOMICHI ,  MAETANI TOSHIO ,  SONOBE AKIO ,  SATO ITSUYA

IPC: B22F1/00 ,  C22C33/02 ,  C22C38/00 ,  C22C38/16

Abstract: An Fe-Mo-Cu-C-type alloy steel powder for powder metallurgy, wherein the alloy steel powder contains 0.2-1.5 mass% of Mo, 0.5-4.0 mass% of Cu, and 0.1-1.0 mass% of C, the remainder comprising Fe and unavoidable impurities, an average particle diameter of an iron-based powder being set to 30-120 µm and an average particle diameter of a Cu powder being set to 10 µm or less. Preferably, the Cu powder has a flat shape satisfying a relation L

公开(公告)号：CA2916153C

公开(公告)日：2018-02-06

申请号：CA2916153

申请日：2014-01-23

Applicant: JFE STEEL CORP

Inventor： NUSHIRO KOUICHI ,  MAETANI TOSHIO ,  ONO TOMOSHIGE ,  OZAKI YUKIKO

IPC: B22F1/00

Abstract: A mixed powder for powder metallurgy includes a machinability improvement powder that is crystalline layered alkaline silicate heat-treated in a range from 400 °C to 1100 °C and whose mix proportion is in a range from 0.01% to 1.0% by mass in terms of total content of an iron-based powder, an alloying powder, and the machinability improvement powder. Such a mixed powder for powder metallurgy not only enables a compact to be sintered without adversely affecting the environment in a sintering furnace, but also enables a sintered body having excellent lathe machinability and excellent drill machinability to be obtained.

公开(公告)号：CA2922018C

公开(公告)日：2018-01-16

申请号：CA2922018

申请日：2014-08-26

Applicant: JFE STEEL CORP

Inventor： MAETANI TOSHIO ,  UNAMI SHIGERU ,  ONO TOMOSHIGE ,  OZAKI YUKIKO

IPC: B22F1/00 ,  C22C33/02 ,  C22C38/00

Abstract: Provided is an alloy steel powder for powder metallurgy that is capable of achieving both high strength and high toughness in a sintered body using the same. An alloy steel powder for powder metallurgy of this disclosure comprises a composite alloy steel powder and graphite powder. The composite alloy steel powder has a specific surface area of 0.100 m2/g or more and Mo content in a range of 0.2 mass% to 1.5 mass%, and the graphite powder content with respect to 100 mass% of the alloy steel powder for powder metallurgy is in a range of 0.1 mass% to 1.0 mass%.