Title:
MANUFACTURING METHOD OF SINTERED Nd-Fe-B MAGNETIC SUBSTRATE CONTAINING NO HEAVY RARE EARTH ELEMENT
Document Type and Number:
Japanese Patent JP2017128793
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of a sintered Nd-Fe-B magnetic substrate containing no heavy rear earth element.SOLUTION: A magnetic substrate high in magnetic property is obtained by pulverizing quick cold coagulant thin section containing no heavy rare earth element after a hydrogen treatment to D=2.0 to 3.0 μm by using a fluid bed type opposing type jet mill, adding a certain content of a lubricant and the mixing them, press molding under a condition of a certain magnetic field orientation and finally conducting a heat treatment under a certain temperature. The used magnetic powder is a normal magnetic powder containing certain contents of Pr-Nd, B, Al, Cu, Ga, Co and the balance Fe.SELECTED DRAWING: Figure 1
Inventors:
DING KAIHONG
PENG ZHONGJIE
WANG GUOHAI
CHEN XIULEI
PENG ZHONGJIE
WANG GUOHAI
CHEN XIULEI
Application Number:
JP2016214850A
Publication Date:
July 27, 2017
Filing Date:
November 02, 2016
Export Citation:
Assignee:
YANTAI SHOUGANG MAGNETIC MAT INC
International Classes:
B22F3/00; B22F1/10; B22F9/04; C22C33/02; C22C38/00; H01F1/057; H01F41/02
Domestic Patent References:
| JP2007134353A | 2007-05-31 |
Foreign References:
| WO2015147053A1 | 2015-10-01 | |||
| WO2013054842A1 | 2013-04-18 | |||
| CN104143403A | 2014-11-12 |
Attorney, Agent or Firm:
Kenji Hidaka