PRODUCTION METHOD OF Fe-Ni ALLOY MATERIAL, METHOD OF MANUFACTURING SOFT MAGNETIC COMPONENT, Fe-Ni ALLOY AND SOFT MAGNETIC COMPONENT MATERIAL

摘要

PROBLEM TO BE SOLVED: To maintain good magnetic properties of a soft magnetic component composed of an Fe-Ni alloy and furthermore to prevent sticking of workpiece and other members to each other during annealing.SOLUTION: A production method of an Fe-Ni alloy material is provided in which: hot forging, hot rolling and cold rolling under prescribed processing conditions are performed on a steel ingot having a prescribed component composition containing Ni:40 to 51 mass%; a cold rolled rolling target material is heated to 800 to 1200°C and is magnetically annealed for 0.15 to 120 min. to obtain a magnetically annealed rolling target material having an average particle diameter of crystal particles of a 25 μm or more; and the magnetically annealed rolling target material is subjected to final cold rolling with a rolling ratio of 0 to 20%.