METHOD OF CONSTANT MAGNET RECEIVING FROM ALLOYS ON BASIS OF SYSTEM NEODYMIUM-IRON-BORON OR PRASEODYMIUM- IRON-BORON

摘要

FIELD: metallurgy. ^ SUBSTANCE: invention concerns area of constant magnets receiving with fine-grain structure from alloys on the basis of system neodymium -iron-boron or praseodymium - iron-boron, holding increased magnetic characteristic. Method includes blank casting and further its deformation by method of equal-channel angular pressing (ECAP) in intersected vertical and horizontal channels with intersection angle equal to 90-135° in range of temperatures 500-800°C with achieving accumulated logarithmic degree of deformation not less then 0.5. Method can include further processes of hot deformation by method of settling or rolling or extrusion of blank. Method can include also additional one-phase or multistep annealing 500-1000°C at different stages of treatment. ^ EFFECT: increasing of magnets magnetic properties, increase in productivity of process magnets receiving. ^ 4 cl, 4 ex, 1 tbl