Title:
Ｒ－Ｔ－Ｂ系焼結磁石の製造方法
Document Type and Number:
Japanese Patent JP7439614
Kind Code:
B2
Abstract:
To provide a method for producing an R-T-B based sintered magnet capable of increasing the utilization efficiency of a diffusion material for a sintered body.SOLUTION: There is provided a method for producing an R-T-B based sintered magnet which comprises: a step of preparing a workpiece of a powder sintered body of an alloy for an R-T-B-based sintered magnet; a step of cutting the workpiece to divide the workpiece into a plurality sintered body pieces; a sintering step of sintering each of the plurality of sintered body pieces to prepare a plurality of sintered body materials; a step of bringing a powder of a diffusion source containing R into contact with the top face and bottom face in the thickness direction in each of the sintered body materials to perform a heat treatment and diffusing at least a part of R contained in the powder of the diffusion source from the top face and the bottom face to the inside of each sintered body material; and a step of cutting each sintered body material from the top face to the bottom face to divide it into a plurality of sintered body pieces.SELECTED DRAWING: Figure 1
More Like This:
Inventors:
Futoshi Kuniyoshi
Application Number:
JP2020057457A
Publication Date:
February 28, 2024
Filing Date:
March 27, 2020
Export Citation:
Assignee:
Proterial Co., Ltd.
International Classes:
B22F3/00; B22F1/00; B22F3/24; B22F8/00; B24B27/06; B24B55/02; C22C33/02; H01F1/057; H01F41/02
Domestic Patent References:
| JP2018093202A | ||||
| JP2020027938A | ||||
| JP2003303728A | ||||
| JP2019062152A |
Foreign References:
| US20170333993 |
Attorney, Agent or Firm:
Seiji Okuda
Shuichi Kita
Mimichi Kajitani
Shuichi Kita
Mimichi Kajitani