| 摘要 |
PURPOSE:To provide an amorphous magnetic material suitable in an application such as a flexible type rolled core or the like which has the decreased deterioration in the square hysteresis characteristic when strained and is to be subjected to molding strain for the purpose of rolling by performing baking in a specific temp. range. CONSTITUTION:An Fe or Fe-Ni amorphous ribbon having a prescribed thickness and width is manufactured by a quick cooling method for a molten metal using a single roll and such ribbon is molded to a troidal-rolled core. The core is baked in a temp. range of 260-390 deg.C and is then unrolled and thereafter the core is rolled again to form a troidal-rolled core. In other words, the core is rolled again after the rolling strain is applied thereon. The rerolled troidal-rolled core shows an increase in magnetic flux density as shown by B1, B10 and in squareness ratio as shown by Br/B1. The coercive force Hc which is the characteristic of an amorphous magnetic material is small in this range.
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