rare earths; hot deformation

作者:陈秀云









,姜忠良









,高天明









,吴严









,杨昌平









,朱静
关键词:rare earths; hot deformation; neodymium prices
http://www.999magnet.com/products/142-neodymium-prices anisotropy; sintering
摘要:The relationship between the microstructures and magnetic properties of rare earth cast permanent  Pr  Fe  B  Cu alloys by hot deformation was studied. Fine and well  aligned column grains can be obtained by using a proper solidification mould with a high cooling rate. The soft magnetic phase α  Fe  can be removed during proper annealing treatment. Hot pressing can produce the anisotropy and refine the grain size, so that the magnetic properties are greatly improved. The technique has the advantages of simple processing, low cost and high benefit, compared with the common sintering processing. Under the condition of the deformation temperature of 1073 K, 90% strain and strain rate of 40×10    -3   s    -1  , the magnetic properties obtained are:   B    r=1.05 T,   i  H    c=955 kA·m    -1  , (  BH  )    max  =207 kJ·m    -3  .