Soft magnetic alloy, soft magnetic alloy ribbon, method of manufacturing soft magnetic alloy ribbon, magnetic core, and component
AssigneeHitachi Metals, Ltd.
InventorsYuichi OGAWA, Naoki ITOH, Takahiro SHIRATAKE, Motoki OHTA
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Abstract
The soft magnetic alloy of the present disclosure is represented by a composition formula of FeaSibBcCudMe where M is at least one type of element selected from a group consisting of Nb, Mo, V, Zr, Hf, and W, and the formula satisfies 82.5≤a≤86, 0.3≤b≤3, 12.5≤c≤15.0, 0.05≤d≤0.9, and 0≤e<0.4 in at %. The soft magnetic alloy includes a structure that has a crystal grain with a grain diameter of 60 nm or less in an amorphous phase.
Claims19
A soft magnetic alloy represented by a composition formula of FeaSibBcCudMe, M being at least one type of element selected from a group consisting of Nb, Mo, V, Zr, Hf, and W, and the formula satisfying 82.5≤a≤86, 0.3≤b≤3, 12.5≤c≤15.0, 0.05≤d≤0.9, and 0≤e<0.4 in at %, the soft magnetic alloy comprising:
- a structure that has a crystal grain with a grain diameter of 60 nm or less in an amorphous phase.
A soft magnetic alloy ribbon including an alloy represented by a composition formula of FeaSibBcCudMe, M being at least one type of element selected from a group consisting of Nb, Mo, V, Zr, Hf, and W, and the formula satisfying 82.5≤a≤86, 0.3≤b≤3, 12.5≤c≤15.0, 0.05≤d≤0.9, and 0≤e≤0.4 in at %, the soft magnetic alloy ribbon comprising:
- a structure that has a crystal grain with a grain diameter of 60 nm or less in an amorphous phase,
- wherein a saturation magnetic flux density of the soft magnetic alloy ribbon is 1.75 T or more, and
- wherein an iron loss of the soft magnetic alloy ribbon at 1 kHz and at 1 T is 25 W/kg or less.
A method of manufacturing a soft magnetic alloy ribbon having a structure that has a crystal grain with a grain diameter of 60 nm or less in an amorphous phase, the method comprising:
- an annealing process of an alloy ribbon,
- wherein, in the annealing process, a temperature 10 to 140° C. less than a bccFe-crystallization starting temperature is a temperature T1, and a temperature 30 to 120° C. less than an Fe—B compound deposition starting temperature is a temperature T2,
- wherein the annealing process comprising:
- heating the alloy ribbon from a room temperature to the temperature T1 at a heating rate of 50° C./sec or more,
- heating the alloy ribbon from the temperature T1 to the temperature T2 at a rate slower than the heating rate from the room temperature to the temperature T1 and at a heating rate of 400° C./sec or less,
- cooling the alloy ribbon after reaching the temperature T2, or
- retaining the alloy ribbon at a temperature between the temperature T2 and the temperature T2 minus 50° C. for 0.5 to 60 seconds after reaching the temperature T2 and subsequently cooling the alloy ribbon.
Dependencies are inferred from the claim text.