METHOD OF PRODUCING RARE-EARTH MAGNET Russian patent published in 2016 - IPC B22F3/14 B22F3/20 C22C28/00 H01F1/57 H01F1/08 

FIELD: metallurgy.

SUBSTANCE: invention relates to production of a rare-earth magnet. At the first stage a compacted powder part is produced from a powder including the main phase RE-Fe-B, where RE is at least one of either Nd or Pr, and the phase of inter-grain boundary around the main phase in the form of alloy RE-X, where X is a metal. Second stage involves hot deformation treatment of the compacted powder part to obtain magnetic anisotropy with production of a rare-earth magnet. Herewith the hot deformation treatment at the second stage comprises two steps, which represent an extrusion to produce a semi-finished product and settling of the semi-finished product. During the extrusion the compacted powder part is placed in a molding head to apply pressure to the compacted powder part with the help of an extrusion die with provision of reduced thickness of the compacted powder part to produce a semi-finished product shaped as a sheet, and during the setting pressure is applied to the semi-finished product shaped as a sheet in the direction of its thickness to reduce the thickness in order to produce the rare-earth magnet.

EFFECT: provided is production of a rare-earth magnet with high degree of orientation over its entire area and high residual magnetization.

6 cl, 18 dwg, 4 tbl