Production of sintered magnet alloy

Abstract

Abstract PURPOSE:To efficiently produce a sintered magnet alloy by using wax having a low softening point as a binder and executing injection molding under specific conditions at the time of kneading magnetic alloy powder contg. Y or rare earth elements with the binder and subjecting the mixture to injection molding. CONSTITUTION:The paraffin base wax having <=120 deg.C softening temp. is used as the binder and the binder is added to the powder of the magnetic alloy contg. Y or rare earth elements such as Sm and Nd, the mixture is heated and kneaded. The kneaded matter is packed into a metallic mold for injection molding kept at <=35 deg.C and is injection-molded to an irregular shape in a magnetic field. The molding is in succession heated at 2-10 deg.C/min heating up temp. up to, for example, 250 deg.C in an Ar atmosphere or vacuum of <=20Torr pressure to remove the binder incorporated therein; thereafter, the molding is sintered at about 1190 deg.C. The irregular shaped sintered magnet alloy having excellent magnetic characteristics is thus efficiently produced.

Inventors

• 👤 Junichi Ishii
• 👤 Kenji Sato
• 👤 Koichiro Maki

Bibliographic Details