公开(公告)号：US11011305B2

公开(公告)日：2021-05-18

申请号：US15988209

申请日：2018-05-24

Applicant: HITACHI METALS, LTD.

Inventor： Yoshimasa Nishio ,  Shin Noguchi ,  Kazunori Nishimura ,  Tetsuroh Katoh ,  Toshio Mihara

IPC: H01F41/02 ,  B22F3/10 ,  H01F27/28 ,  B22F3/16 ,  H01F1/22 ,  H01F1/147 ,  H01F1/24 ,  H01F1/33 ,  B22F1/02 ,  C22C38/00 ,  H01F27/255 ,  C22C38/02 ,  C22C38/06 ,  C22C38/18 ,  C22C38/34 ,  C22C33/02

Abstract: A method for manufacturing a powder magnetic core using a soft magnetic material powder, wherein the method has: a first step of mixing the soft magnetic material powder with a binder, a second step of subjecting a mixture obtained through the first step to pressure forming, and a third step of subjecting a formed body obtained through the second step to heat treatment. The soft magnetic material powder is an Fe—Cr—Al based alloy powder comprising Fe, Cr and Al. An oxide layer is formed on a surface of the soft magnetic material powder by the heat treatment. The oxide layer has a higher ratio by mass of Al to the sum of Fe, Cr and Al than an alloy phase inside the powder.

公开(公告)号：US10008324B2

公开(公告)日：2018-06-26

申请号：US14760964

申请日：2014-01-14

Applicant: Hitachi Metals Ltd.

Inventor： Yoshimasa Nishio ,  Shin Noguchi ,  Kazunori Nishimura ,  Tetsuroh Katoh ,  Toshio Mihara

IPC: H01F41/02 ,  B22F3/24 ,  H01F1/147 ,  B22F3/16 ,  H01F1/22 ,  H01F27/28 ,  B22F1/02 ,  C22C38/00 ,  H01F27/255 ,  C22C38/02 ,  C22C38/06 ,  C22C38/18 ,  C22C38/34 ,  H01F1/24 ,  H01F1/33 ,  B22F3/10 ,  C22C33/02

CPC classification number: H01F41/02 ,  B22F1/02 ,  B22F3/1039 ,  B22F3/16 ,  B22F2201/03 ,  B22F2201/05 ,  B22F2302/253 ,  B22F2304/10 ,  C22C33/02 ,  C22C38/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/18 ,  C22C38/34 ,  C22C2202/02 ,  H01F1/147 ,  H01F1/22 ,  H01F1/24 ,  H01F1/33 ,  H01F27/255 ,  H01F27/2823 ,  H01F41/0246

Abstract: A method for manufacturing a powder magnetic core using a soft magnetic material powder, wherein the method has: a first step of mixing the soft magnetic material powder with a binder, a second step of subjecting a mixture obtained through the first step to pressure forming, and a third step of subjecting a formed body obtained through the second step to heat treatment. The soft magnetic material powder is an Fe—Cr—Al based alloy powder comprising Fe, Cr and Al. An oxide layer is formed on a surface of the soft magnetic material powder by the heat treatment. The oxide layer has a higher ratio by mass of Al to the sum of Fe, Cr and Al than an alloy phase inside the powder.

公开(公告)号：US20150332850A1

公开(公告)日：2015-11-19

申请号：US14760964

申请日：2014-01-14

Applicant: HITACHI METALS LTD.

Inventor： Yoshimasa Nishio ,  Shin Noguchi ,  Kazunori Nishimura ,  Tetsuroh Katoh ,  Toshio Mihara

IPC: H01F41/02 ,  C22C38/06 ,  H01F1/147 ,  H01F1/22 ,  H01F27/255 ,  H01F27/28 ,  C22C38/18 ,  B22F3/16

CPC classification number: H01F41/02 ,  B22F1/02 ,  B22F3/1039 ,  B22F3/16 ,  B22F2201/03 ,  B22F2201/05 ,  B22F2302/253 ,  B22F2304/10 ,  C22C33/02 ,  C22C38/00 ,  C22C38/002 ,  C22C38/02 ,  C22C38/06 ,  C22C38/18 ,  C22C38/34 ,  C22C2202/02 ,  H01F1/147 ,  H01F1/22 ,  H01F1/24 ,  H01F1/33 ,  H01F27/255 ,  H01F27/2823 ,  H01F41/0246

Abstract: A method for manufacturing a powder magnetic core using a soft magnetic material powder, wherein the method has: a first step of mixing the soft magnetic material powder with a binder, a second step of subjecting a mixture obtained through the first step to pressure forming, and a third step of subjecting a formed body obtained through the second step to heat treatment. The soft magnetic material powder is an Fe—Cr—Al based alloy powder comprising Fe, Cr and Al. An oxide layer is formed on a surface of the soft magnetic material powder by the heat treatment. The oxide layer has a higher ratio by mass of Al to the sum of Fe, Cr and Al than an alloy phase inside the powder.

Abstract translation: 一种使用软磁性材料粉末制造粉末磁芯的方法，其中所述方法具有：将软磁性材料粉末与粘合剂混合的第一步骤，将通过第一步骤获得的混合物进行压力成形的第二步骤， 以及对通过第二步骤获得的成形体进行热处理的第三步骤。 软磁性材料粉末是包含Fe，Cr和Al的Fe-Cr-Al基合金粉末。 通过热处理在软磁性材料粉末的表面上形成氧化物层。 与粉末中的合金相相比，氧化物层的Al的质量比Fe，Cr和Al的总和高。