Amorphous alloy ribbon and method of producing the same

Patent metadata

Field	Value
Publication number	US-10661334-B2
Application number	US-201615334803-A
Country	US
Kind code	B2
Filing date	Oct 26, 2016
Priority date	Mar 15, 2012
Publication date	May 26, 2020
Grant date	May 26, 2020

Abstract

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.

First claim

What is claimed is:

1. An amorphous alloy ribbon, in which a number of feathers protruding generally along a longitudinal direction of the ribbon and having a length of 1 mm or longer measured along the longitudinal direction at width-direction ends of the ribbon is 1 or less per 1 m of length of the ribbon in the longitudinal direction,
wherein the ribbon has a thickness of from 10 μm to 40 μm and a width of from 100 mm to 300 mm.

2. The amorphous alloy ribbon according to claim 1 , which is produced by a single-roll method.

Assignees

• Hitachi Metals Ltd

Inventors

• Shibasaki Hiroshi
• Motegi Takayuki
• Itagaki Hajime
• Sunakawa Jun
• Bizen Yoshio

Classifications

• B22D11/0611

  formed by a single casting wheel, e.g. for casting amorphous metal strips or wires · CPC title

• B22D11/103

  Distributing the molten metal, e.g. using runners, floats, distributors · CPC title

• B22D11/10

  Supplying or treating molten metal (B22D41/00 takes precedence) · CPC title

• B22D11/124

  for cooling · CPC title

• C22C45/006

  with Cr as the major constituent · CPC title