Method for preparing nano composite permanent magnet material by adding zirconium into magnetic steel waste
A permanent magnetic material and nanocomposite technology, which is applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problem of the difficulty in controlling the scale and composition of two phases, the difficulty in increasing the maximum magnetic energy product of isotropic nanomaterials, and the difficulty in Precisely control the grain size and distribution of hard magnetic phase and soft magnetic phase to achieve the effect of changing grain microstructure and magnetic properties, low rare earth content, and saving time
Inactive Publication Date: 2016-01-20
SUZHOU SABO IND DESIGN
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Abstract
The invention relates to a method for preparing a nano composite permanent magnet material by adding zirconium into magnetic steel waste. Collected waste magnetic steel is presorted according to the classification standard that the waste magnetic steel which is in the same batch and model and is provided with same rare earth elements is classified as one class, and a pre-processed magnet material is obtained; the obtained pre-processed magnet material is directly subjected to hydrogen decrepition pulverizing, and rare earth hydrogen decrepition magnetic powder is obtained; sampling analysis is carried out on the rare earth hydrogen decrepition magnetic powder, and the zirconium is added into the rare earth hydrogen decrepition magnetic powder according to needs to obtain mixed powder; and finally through static pressing, sintering and annealing, the needed nano composite permanent magnet material is prepared. The problem of segregation, caused by factors such as different smelting pints of all compositions and the like, generated by an alloy ingot obtained after smelting can be effectively solved; and through presorting, the time for recovering the waste magnetic steel can be saved, and the process step of extraction is omitted. The zirconium is added into the rare earth hydrogen decrepition magnetic powder, the grain microstructure and the magnetic performance of the nano composite permanent magnet material can be changed, and grain refinement is promoted; and the nano composite permanent magnet material obtained through a precipitation separation method is high in performance and low in rare earth content.
Application Domain
Magnetic materials
Technology Topic
Rare-earth elementScrap +10
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- Experimental program(5)
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