METHOD FOR PRODUCING Fe-Si-Al POWDER FOR DUST CORE

摘要

PROBLEM TO BE SOLVED: To provide a method for production Fe-Al-Si powder for dust core excellent in core characteristics and also excellent in productivity by obtaining spherical powder in a certain optimum range. SOLUTION: As to this method for producing Fe-Si-Al powder for dust core, in the method for producing a dust core using Fe-Si-Al alloy powder, the spherical powder of an Fe-Si-Al alloy is produced by gas atomizing, and thereafter, the powder is pulverized to obtain the powder in which the one having a particle size of 200μm or less and an aspect ratio of 1.1 or less is contained by 30 to 70 wt.%.