MANUFACTURING METHOD FOR RARE EARTH PERMANENT MAGNET MATERIAL

• Main Authors: DONG YI, YI HAIBO, WU SHUJIE, YUAN WENJIE, YUAN YI, FAN YUELIN, CHEN YA, MIAO JUCHANG, DIAO SHULIN
• Format: Patent
• Language: English; Japanese
• Published: 07.07.2016
• Subjects: BASIC ELECTRIC ELEMENTS; CASTING; ELECTRICITY; INDUCTANCES; MAGNETS; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; PERFORMING OPERATIONS; POWDER METALLURGY; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS; TRANSPORTING; WORKING METALLIC POWDER

PROBLEM TO BE SOLVED: To provide a manufacturing method for a rare earth permanent magnet material.SOLUTION: A manufacturing method according to the present invention includes an atomization spraying coating process and a permeation process, and a sintered rare earth magnet having been subjected to an atomization spraying coating process in advance before permeation is placed in a closed container. A grain boundary phase of the sintered rare earth magnet is impregnated with an atomized and applied heavy rare earth element by atomizing, spraying, and applying a solution having the heavy rare earth element on a surface of a sintered R1-Fe(Co)-B-A-X-M rare earth magnet, and then performing heat treatment after burning. When the manufacturing method according to the present invention is employed, the amount of the heavy rare earth element in use is reduced and the manufacturing cost is low as compared with traditional processes. Further, the manufacturing method according to the present invention reduces a decrease in residual magnetic flux density, and thereby greatly improve coercive force of the magnet and also remarkably lower the temperature coefficient of residual magnetic flux density and the temperature coefficient of the coercive force of the magnet, thereby remarkably improving demagnetization resistance performance of the magnet at high temperature.SELECTED DRAWING: Figure 1 【課題】本発明は希土類永久磁石材料の製造方法を提供する。【解決手段】本発明に係る製造方法は霧化噴霧塗着プロセスと浸透プロセスを含み、浸透させる前に予め霧化噴霧塗着された焼結希土類磁石を密閉容器の中に置く。焼結R1-Fe(Co)-B-A-X-M希土類磁石の表面に重希土類元素を含有する溶液を霧化噴霧塗着させ、焼き付けてから熱処理することにより、噴霧塗着された重希土類元素を焼結希土類磁石の粒界相に浸透させる。本発明の製造方法を採用する場合に、伝統的なプロセスに比べると重希土類元素の使用量を節約し、生産コストを低減できる。さらに、本発明の製造方法は残留磁束密度の低下が少なくて、磁石の保磁力を大幅に向上させるとともに、磁石の残留磁束密度の温度係数と保磁力の温度係数を顕著に低下させ、磁石の高温での消磁抵抗性能を顕著に改善させることができる。【選択図】図1