Title:
Ｒ−Ｔ−Ｂ系焼結磁石の製造方法およびＲ−Ｔ−Ｂ系焼結磁石
Document Type and Number:
Japanese Patent JP6508571
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of an R-T-B sintered magnet capable of stably manufacturing an R-T-B sintered magnet having excellent magnetic characteristics, where B, H, and H/Hhave high levels entirely, by using a heavy rare earth element RH as small as possible, and to provide an R-T-B sintered magnet obtained by that method.SOLUTION: An R-T-B main alloy composed of B amount, substantially similar to the R-T-B alloy conventionally used generally, and a secondary alloy containing Pr, B, Ga, Ti or Zr, and Fe as essential elements, are mixed and pulverized to produce a mixed alloy pulverization powder. For 100 mass% of the mixed alloy pulverization powder, 0.1-0.3 mass% of Ti or 0.19-0.57 of Zr are mixed and then molded, sintered, and heat-treated.SELECTED DRAWING: Figure 1
Inventors:
Fukagawa Tomoki
Application Number:
JP2015130835A
Publication Date:
May 08, 2019
Filing Date:
June 30, 2015
Export Citation:
Assignee:
Hitachi Metals Co., Ltd.
International Classes:
H01F41/02; B22F1/00; B22F3/00; C22C33/02; C22C38/00; H01F1/057; H01F1/08
Domestic Patent References:
| JP2012079796A | ||||
| JP2005197301A | ||||
| JP5175026A |
Foreign References:
| WO2015002280A1 |