HEAT TREATMENT OF MAGNETIC CORE

摘要

PURPOSE:To obtain a magnetic core stationarily being stable in product property even if dispersion occurs by noticing that there is dispersion in the property of magnetic ribbons being offered by lots. CONSTITUTION:When heat-treating a magnetic ribbon after winding it, the optimum heat treatment temperature is decided by measuring the differential crystalization temperature of the magnetic ribbon being sampled optionally from among the material lot, and comparing this measured temperature value with the differential crystallization temperature corresponding to the heat treatment temperature at the target permeability being made in advance.