PURPOSE: To obtain a soft magnetic alloy excellent in magnetic property by the production method suitable for mass-production with using a deoxidiser and slag making agent having low Ti and S content.
CONSTITUTION: When the soft magnetic alloy containing, by weight, 35-50% Ni, ≤15% Cr, and ≤1.2% Al is produced, the deoxidizer and slaging agent with being reduced to ≤0.05% Ti and ≤0.05% S, are used so as to reduce to ≤0.003% S. ≤0.005% O, ≤0.005% B and ≤0.005% Ti under the condition of ≤0.008(S+O+B). Cab, CaF, Al2O3, SiO2, etc., as the slaging agent are used with properly being combined. By this method, because there is scarcely a fine Ti inclusion, the growth of crystal line grain is not obstructed at magnetic annealing, the soft magnetic alloy with large magnetic permeability is obtained.
IWAMOTO HISAO
TAKEMOTO TOSHIHIKO
HASEGAWA MORIHIRO
