SOFT MAGNETIC SINTERED ALLOY HAVING EXCELLENT SURFACE DENSENESS AND DIMENSIONAL ACCURACY AND PRODUCTION METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a soft magnetic sintered alloy which has excellent surface denseness and dimensional accuracy, and to provide a production method therefor.;SOLUTION: The soft magnetic sintered alloy is composed of a soft magnetic sintered alloy surface layer part having a thickness within the range of 1 μm to 2 mm from the surface and a soft magnetic sintered alloy inner part. The soft magnetic sintered alloy surface layer part contains K and/or Na in 0.01 to 1 mass% in the average concentration. The soft magnetic sintered alloy has excellent surface denseness and dimensional accuracy.;COPYRIGHT: (C)2005,JPO&NCIPI