Radial multi-pole orientation neodymium iron boron magnet ring and preparation method thereof

• Main Authors: HUANG DONGYA, LIN BAICHUN, PENG HUI, WANG YUE, XIE SHUFENG, LI ZHONGLI, YANG JUN
• Format: Patent
• Language: Chinese; English
• Published: 03.10.2023
• Subjects: BASIC ELECTRIC ELEMENTS; CASTING; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; DYNAMO-ELECTRIC MACHINES; ELECTRICITY; GENERATION; 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

The invention provides a radial multi-pole orientation neodymium iron boron magnetic ring and a preparation method thereof. The preparation method comprises the following steps: S1, preparing anisotropic magnetic powder from an alloy A, and preparing grain boundary diffusion source powder from an alloy B; s2, the anisotropic magnetic powder and alloy B powder are mixed according to a certain proportion, and the mixed powder is subjected to orientation pressing sintering forming in a magnetic field to obtain a multi-pole magnetic ring primary blank; s3, performing high-temperature sintering and grain boundary diffusion on the multi-pole magnet ring primary blank in a heat treatment furnace to obtain a multi-pole sintered magnet ring; and S4, carrying out surface treatment on the multi-pole sintered magnetic ring, and magnetizing to obtain the radial multi-pole orientation neodymium iron boron magnetic ring. The radial multi-pole orientation neodymium-iron-boron magnetic ring is prepared on the basis of the HDD