METHOD OF MANUFACTURING SINTERED FE-SI TYPE SOFT MAGNETS

摘要

PURPOSE: Disclosed is a method for making sintered Fe-Si based soft magnetic alloy which has a good friability, a high sintered density and excellent soft magnetic characteristics and is capable of being used in a high-frequency section. CONSTITUTION: In the method for making sintered Fe-Si based soft magnetic alloy, molten Fe-(3.0-6.5w%) Si alloy is cooled at a cooling rate of 8-35m/sec and thereafter powder is produced. This powder is crushed and a bonding agent is added to the powder at 0.5-3% of the total weight of Fe-Si based soft magnetic alloy. After mixing the bonding agent with the powder, this mixture is pressed at a pressure of 1-10ton/cm2 and is sintered at a temperature of 1100-1350 deg.C. The sintered Fe-Si based soft magnetic alloy represents a high density and an excellent soft magnetic characteristics at a low temperature. This sintered Fe-Si based soft magnetic alloy is used as magnetic materials in a transformer, a motor, a core of generator, etc.