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METHOD FOR PRODUCING A RARE EARTH SINTERED MAGNET AND ITS RAW MATERIAL AND GRANULES 发明授权

2023-08-31 3890 1264K 0

专利信息

申请日期 2025-06-24 申请号 EP05755236
公开(公告)号 EP1762316B1 公开(公告)日 2014-07-16
公开国别 EP 申请人省市代码 全国
申请人 TDK Corporation
简介 Provided is a method for producing a rare earth sintered magnet using granules having excellent fluidity, which cannot only improve dimensional accuracy of a compact, but also improves productivity, without causing properties to dramatically drop. The method comprises the steps of charging a rare earth sintered magnet raw material powder and a granulation aid into a chamber, the raw material powder being agglomerated through contact with the granulation aid by rotating a main blade provided in the chamber relative to the chamber, and the resulting agglomerate being loosened by an auxiliary blade provided in the chamber for producing the granules; charging the granules into a die cavity; obtaining a compacted body by applying a magnetic field to the granules and compressing the granules; and sintering the compacted body.


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