Method for improving coercive force of sintered rare earth-iron-boron permanent magnetic material

Method for improving coercive force of sintered rare earth-iron-boron permanent magnetic material

  • CN 102,747,318 A
  • Filed: 05/29/2012
  • Published: 10/24/2012
  • Est. Priority Date: 05/29/2012
  • Status: Active Application
First Claim
Patent Images

1. one kind is improved the coercitive method of sintering rare-earth-iron-B permanent magnetic material;

  • It is characterized in that;

    sintering rare-earth-iron-B permanent magnetic material is embedded in the hydrogenate powder of pure rare earth or mishmetal and carries out vacuum heat treatment;

    Naturally cool to room temperature 700~

    1000 ℃

    of thermal treatments after 1~

    20 hour;

    Then take out this sintering rare-earth-iron-B permanent magnetic material, be placed in the heat treatment furnace, 450~

    600 ℃

    of vacuum heat treatment 1~

    5 hour.

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