A preparation method for sintered neodymium-iron-boron magnet

A preparation method for sintered neodymium-iron-boron magnet

The invention provides a preparation method for sintered neodymium-iron-boron magnet. The method comprises the steps of after sintered neodymium-iron-boron magnet blanks naturally cool to be 400 DEG C-700 DEG C, feeding a protective gas to perform quench cooling. A crack acceptance rate is increased...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: TANG MIJUN
Format: Patent
Sprache:chi ; eng
Schlagworte:
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
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Beschreibung
Zusammenfassung:The invention provides a preparation method for sintered neodymium-iron-boron magnet. The method comprises the steps of after sintered neodymium-iron-boron magnet blanks naturally cool to be 400 DEG C-700 DEG C, feeding a protective gas to perform quench cooling. A crack acceptance rate is increased from 83% to 100%; costs are obviously reduced while other performances are not influenced. 本发明提供种烧结钕铁硼磁体的制备方法，其包括以下步骤：将烧结后的钕铁硼磁体毛坯自然冷却至400℃-700℃后，通入保护气体进行淬火冷却。裂纹合格率从83％提高到100％，成本明显减低，同时不会影响其他性能。