Rare earth-ferrum-boron-contained mixed cementation magnetic powder and preparation method for same

The invention relates to the technical field of permanent magnetic material and concretely relates to a rare earth-ferrum-boron-contained mixed cementation magnetic powder and a preparation method for the same. the magnetic powder is formed by the following metal elements by percentage: 23% to 24% o...

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Bibliographic Details
Main Authors ZHANG CAIZHENG, ZHANG XUEZHONG, YI GUOXIANG, ZHANG WEIHUA
Format Patent
LanguageChinese
English
Published 22.12.2017
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
INDUCTANCES
MAGNETS
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
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Summary:The invention relates to the technical field of permanent magnetic material and concretely relates to a rare earth-ferrum-boron-contained mixed cementation magnetic powder and a preparation method for the same. the magnetic powder is formed by the following metal elements by percentage: 23% to 24% of MM, 0.98% to 1.1% of B, 1.5% to 2.0% of Nb, 1.0% to 1.5% of A1, 4.5% to 5.0% of Co and rest Fe. Neodymium content of the MM is mixed rare earth element being no less than 16.9%. Metal neodymium is replaced by mixed rare earth containing neodymium element and Alpha-Fe phase precipitation can be prevented with the control of the use amount of the mixed rare earth and the content of the neodymium in the mixed rare earth and the addition of aluminum, niobium and cobalt; irreversible loss of magnetic flux can be reduced and coercive force can be improved and temperature tolerance can be improved; with combinations of fast-cooling technology in the preparation method and controls of production equipment and parameters,
Bibliography:Application Number: CN20171506268