Patent ID: 6838014
Filing Date: 2005-01-04
Classification: B22D,B22F,B82Y,H01F,Y10T

Abstract:
1. A ribbon-shaped magnetic material which is manufactured by colliding a molten alloy to a circumferential surface of a cooling roll so as to cool and then solidify it, comprising: a plurality of ridges and grooves formed on a roll contact surface of the ribbon-shaped magnetic material, said grooves having a width in the range of 1-50 μm: wherein the plurality of ridges and grooves are transferred to the roll contact surface of the ribbon-shaped magnetic material from the circumferential surface of the cooling roll by dimple correcting means formed on the circumferential surface of the cooling roll for dividing dimples that are produced on the roll contact surface of the ribbon-shaped magnetic material which is in contact with the circumferential surface of the cooling roll, the dimple correcting means defined by a plurality of ridges provided by forming a plurality of grooves with an average width of 1-50 μm, the width of the grooves enabling the expelling of a gas that is entered between the molten alloy and the circumferential surface of the cooling roll.