Fe-based amorphous alloy ribbon manufacturing method, Fe-based amorphous alloy ribbon manufacturing device, and wound body of Fe-based amorphous alloy ribbon

A method of manufacturing an Fe-based amorphous alloy ribbon, via an Fe-based amorphous alloy ribbon manufacturing device comprising:

• a chill roll, wherein a coated film of a molten alloy is formed on a peripheral surface of the chill roll and is cooled on the peripheral surface to form an Fe-based amorphous alloy ribbon, wherein the molten alloy is a source material for the Fe-based amorphous alloy ribbon,
• a molten metal nozzle configured to discharge the molten alloy toward the peripheral surface of the chill roll,
• a peeling means configured to peel off the Fe-based amorphous alloy ribbon from the peripheral surface of the chill roll,
• a wind-up roll configured to wind the Fe-based amorphous alloy ribbon that has been peeled off, and
• a polishing brush roll, comprising a roll axis member and a polishing brush, the polishing brush comprising a plurality of brush bristles having tips, wherein the polishing brush roll (i) is placed around the roll axis member;
• (ii) is provided between the peeling means and the molten metal nozzle at a periphery of the chill roll;
• and, (iii) is configured to polish by bringing the polishing brush into contact with the peripheral surface of the chill roll while rotating axially in a reverse direction to the chill roll;
• wherein a free length of the brush bristles is more than 30 mm but no more than 50 mm, and a density of the brush bristles at the brush bristle tips is more than 0.30 bristles/mm2 but no more than 0.60 bristles/mm2;
• the method comprising (a) forming a coated film of the molten alloy on the peripheral surface of the chill roll that has been subjected to polishing using the polishing brush roll;
• (b) cooling the coated film on the peripheral surface;
• (c) peeling off the Fe-based amorphous ribbon from the peripheral surface of the chill roll;
• (d) polishing the peripheral surface of the chill roll by using the polishing brush of the polishing brush roll;
• and, (e) winding the Fe-based amorphous alloy ribbon on the wind-up roll to obtain a wound body of the Fe-based amorphous alloy ribbon.