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AssigneeHitachi Metals, Ltd.
InventorsHiroshi SHIBASAKI, Takayuki MOTEGI, Hajime ITAGAKI, Jun SUNAKAWA, Yoshio BIZEN
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The invention provides a method of producing an amorphous alloy ribbon, the method including a step of producing an amorphous alloy ribbon by discharging a molten alloy through a rectangular opening of a molten metal nozzle having a molten metal flow channel along which the molten alloy flows, the opening being an end of the molten metal flow channel, onto a surface of a rotating chill roll, in which, among wall surfaces of the molten metal flow channel, a maximum height Rz(t) of a surface t, which is a wall surface parallel to a flow direction of the molten alloy and to a short side direction of the opening, is 10.5 μm or less.
An amorphous alloy ribbon, in which a number of feathers having a length of 1 mm or longer measured along a longitudinal direction of the ribbon at width-direction ends of the ribbon is 1 or less per 1 m of length of the ribbon in a longitudinal direction.
Dependencies are inferred from the claim text.