Title:
METHOD FOR PRODUCING FE-SI-B-BASED THICK RAPIDLY SOLIDIFIED ALLOY THIN STRIP
Document Type and Number:
WIPO Patent Application WO/2022/196672
Kind Code:
A1
Abstract:
A method for producing an alloy thin strip, wherein an Fe-Si-B-based alloy melt, which essentially contains iron (Fe), boron (B) and silicon (Si), is spouted from a tapping nozzle onto the surface of a cooling roll and the cooling roll is rotated such that the surface speed thereof is 15 to 50 m/sec, thereby rapidly cooling the alloy melt on the surface of the cooling roll so as to produce an alloy thin strip. With respect to this method for producing a rapidly solidified alloy thin strip, the tapping nozzle is provided with slits that are arranged in two to four rows in the formation direction of the alloy thin strip, while having a width of not less than 0.2 mm but less than 1.2 mm; the cooling roll has a curvature of not less than 8 × 10-4 but less than 2 × 10-3; and a rapidly solidified alloy thin strip, which has an average thickness of not less than 30 μm but less than 70 μm and an average width of not less than 50 mm but less than 200 mm, while containing 90% by volume or more of an amorphous alloy structure, is produced by flowing a cooling water that is not less than 5°C but less than 60°C through the cooling roll at a cooling water flow rate of not less than 0.3 m3/min but less than 20 m3/min.
Inventors:
KANEKIYO HIROKAZU (JP)
Application Number:
PCT/JP2022/011505
Publication Date:
September 22, 2022
Filing Date:
March 15, 2022
Export Citation:
Assignee:
HILLTOP CORP (JP)
International Classes:
C22C45/02; B22D11/06; C22C38/00; H01F1/153; H01F27/25
Domestic Patent References:
| WO2020235097A1 | 2020-11-26 | |||
| WO2012102379A1 | 2012-08-02 |
Foreign References:
| JP2001269753A | 2001-10-02 | |||
| JPS6368250A | 1988-03-28 | |||
| JP2001001113A | 2001-01-09 | |||
| JPH07100599A | 1995-04-18 |
Attorney, Agent or Firm:
ARAWORE INTERNATIONAL IP LAW FIRM (JP)
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