AMORPHOUS ALLOY RIBBON AND METHOD FOR MANUFACTURING SAME
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United States of America Patent
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Jul 9, 2020
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Jul 3, 2018
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Jul 4, 2017
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Abstract
A method of producing an amorphous alloy having a composition of Fe100-a-bBaSibCc (13.0 atom %≤a≤16.0 atom %, 2.5 atom %≤b≤5.0 atom %, 0.20 atom %≤c≤0.35 atom %, and 79.0 atom %≤(100−a−b)≤83.0 atom %) includes: preparing an alloy ribbon; and, in a state in which the alloy ribbon is tensioned with a tensile stress of from 20 MPa to 80 MPa, increasing a temperature of the alloy ribbon to from 410° C. to 480° C., at an average temperature increase rate of from 50° C./sec to less than 800° C./sec, and decreasing a temperature of the thus heated alloy ribbon to a temperature of a heat transfer medium for temperature-decreasing, at an average temperature decrease rate of from 120° C./sec to less than 600° C./sec.
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