Title:
AMORPHOUS METAL THIN STRIP, LAMINATED CORE, AND AMORPHOUS METAL THIN RIBBON PUNCHING METHOD
Document Type and Number:
WIPO Patent Application WO/2020/179399
Kind Code:
A1
Abstract:
Provided are a punching method demonstrating excellent amorphous metal thin ribbon punching performance, and an amorphous metal thin strip and a laminated core produced by same. The amorphous metal thin strip has a metal thin strip thickness that is thicker than 30 μm but 50 μm or thinner. The metal thin strip has a side surface comprising a punched surface wherein at least a droop, a shear cross-section, and a fracture cross-section are observed. Within the side surface, the droop width relative to the metal thin strip thickness is no more than 30%.
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Inventors:
OHTA MOTOKI (JP)
Application Number:
PCT/JP2020/005649
Publication Date:
September 10, 2020
Filing Date:
February 13, 2020
Export Citation:
Assignee:
HITACHI METALS LTD (JP)
International Classes:
B21D28/00; C22C45/02; H01F1/153; H01F27/245; H01F41/02
Domestic Patent References:
| WO2018155206A1 | 2018-08-30 |
Foreign References:
| JPS629898A | 1987-01-17 | |||
| JPH04147725A | 1992-05-21 | |||
| JPS6158450A | 1986-03-25 | |||
| JP2009263775A | 2009-11-12 | |||
| JP2013185162A | 2013-09-19 | |||
| US20020158540A1 | 2002-10-31 | |||
| JP2008213410A | 2008-09-18 |
Other References:
See also references of EP 3932582A4
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