PRODUCTION OF ALNICO MAGNETIC ALLOY POWDER FOR RESIN MAGNET

摘要

PURPOSE:To simply and inexpensively produce an Alnico magnetic alloy powder for resin magnet by kneading a specific metallic powder under specific conditions and aging by heating it under specific conditions. CONSTITUTION:At least two kinds of metallic powder and/or alloy powder having 100-600mum average particle diameter is kneaded in a ball mill in a non- oxidizing atmosphere for >=5 hours to be made 30-200mum average particle diameter. The kneaded material is heated to and held at 900-1300 deg.C in a non-oxidizing atmosphere and next, is cooled to or kept at 1000-800 deg.C in a magnetic field and furthermore is aged at 650-800 deg.C. As a result, dissolving process and pulverizing process become unnecessary.