Amorphous metal thin strip, laminated core, and amorphous metal thin ribbon punching method
AssigneeProterial, Ltd.
InventorMotoki Ohta
Life of this patent
Estimating the term…
Abstract
A punching method with a favorable punchability with respect to amorphous metal thin ribbons, an amorphous metal thin strip produced by the method, and a laminated core, are provided. The amorphous metal thin strip has a thickness of from more than 30 μm to 50 μm, and a side configured by a punched surface on which at least a shear droop, a shearing surface, and a fractured surface are observed, the width of the shear droop relative to the thickness of the metal thin strip being 30% or less at the side.
Claims9
An amorphous metal thin strip, having an alloy composition represented by the following formula:
- Fe100-a-b-c-dBaSibCcMd
- wherein, in the formula, M is at least one of Al, Sn, Cr, Mn, Ni or Cu, and a, b, c, and d satisfy 7≤a≤20, 1≤b≤19, 0≤c≤4, and 0≤d≤2 in atomic %,
- comprising:
- a side configured by a punched surface on which at least a shear droop, a shearing surface, and a fractured surface are observed, wherein:
- the metal thin strip has a thickness of 30.3 μm or larger and 50 μm or smaller, and
- at the side, a width of the shear droop relative to the thickness of the metal thin strip is 30% or less.
An amorphous metal thin ribbon punching method, comprising:
- preparing an amorphous metal thin ribbon with a thickness of 30.3 μm or larger and 50 μm or smaller;
- punching the amorphous metal thin ribbon;
- and
- forming a side of the amorphous metal thin ribbon configured by a punched surface on which at least a shear droop, a shearing surface, and a fractured surface are observed,
- wherein, at the side, a width of the shear droop relative to the thickness of the metal thin strip is 30% or less,
- wherein the amorphous metal thin ribbon has an alloy composition represented by the following formula:
- Fe100-a-b-c-dBaSibCcMd
- wherein, in the formula, M is at least one of Al, Sn, Cr, Mn, Ni or Cu, and a, b, c, and d satisfy 7≤a≤20, 1≤b≤19, 0≤c≤4, and 0≤d≤2 in atomic %.
Dependencies are inferred from the claim text.