Cooling roll and manufacturing apparatus of amorphous alloy strip

Abstract

A cooling roll includes flow channels piercing a side surface of the cooling roll in a rotation-axis direction. The flow channels are arranged at uniform spacing on two or more concentric circles having a rotation axis of the roll as a center. A manufacturing apparatus of an amorphous alloy strip includes the cooling roll. Thereby, the amorphous alloy strip having a large thickness can be manufactured in industrial scale.

What is claimed is: 
     
         1 . A cooling roll for amorphous alloy strip manufacturing, the cooling roll comprising flow channels piercing a side surface of the cooling roll in a rotation-axis direction, the flow channels being arranged at uniform spacing on two or more concentric circles having a rotation axis of the roll as a center. 
     
     
         2 . The cooling roll according to  claim 1 , wherein each of the flow channels has a diameter of 20 to 50 mm. 
     
     
         3 . A manufacturing apparatus of an amorphous alloy strip, comprising the cooling roll according to  claim 2 . 
     
     
         4 . A manufacturing apparatus of an amorphous alloy strip, comprising the cooling roll according to  claim 1 . 
     
     
         5 . A method for manufacturing an amorphous alloy strip, comprising contacting a melt to an outer circumferential surface of a cooling roll rotating, the cooling roll including flow channels piercing the cooling roll in a rotation-axis direction of the cooling roll, the flow channels being arranged at uniform spacing on two or more concentric circles, controlling water amounts flowing through the flow channels independently for each of the concentric circles. 
     
     
         6 . The method according to  claim 5 , wherein each of the flow channels has a diameter of 20 to 50 mm.