Soft magnetic alloy and method for producing soft magnetic alloy
AssigneeVacuumschmelze GmbH & Co. KG
InventorsWitold Pieper, Niklas Volbers, Joachim Gerster
Life of this patent
Estimating the term…
Abstract
A soft magnetic alloy is provided that consists essentially of 47 weight percent≤Co≤50 weight percent, 1 weight percent≤V≤3 weight percent, 0 weight percent≤Ni≤0.2 weight percent, 0.08 weight percent≤Nb≤0.12 weight percent, 0 weight percent≤C≤0.005 weight percent, 0 weight percent≤Mn≤0.1 weight percent, 0 weight percent≤Si≤0.1 weight percent, remainder Fe.
Claims30
A soft magnetic alloy consisting of 47 weight percent≤Co≤50 weight percent, 1 weight percent≤V≤3 weight percent, 0 weight percent≤Ni≤0.2 weight percent, 0.08 weight percent≤Nb≤0.12 weight percent, 0 weight percent≤C≤0.007 weight percent, 0 weight percent≤Mn≤0.1 weight percent, 0 weight percent≤Si≤0.1 weight percent, up to 0.5 weight percent impurities selected from the group consisting of one or more of Cr, Cu, Mo, Al, S, Ti, Ce, B, N, Mg, Ca, P and mixtures thereof, remainder Fe,
- wherein the soft magnetic alloy has a yield strength (0.2% strain) of between 200 MPa and 450 MPa in an annealed state,
- wherein the soft magnetic alloy has a resistivity of at least 0.4 μΩm, or an induction B(8 A/cm) of at least 2.12 T, or both, and
- wherein in an annealed state, the soft magnetic alloy comprises a yield strength (0.2% strain) that lies within ±10% of a linear function of yield strength (0.2% strain) against annealing temperature at a given annealing time over an annealing temperature range of 730° C. to 900° C.
A method for manufacturing a soft magnetic alloy, comprising providing a melt consisting of 47 weight percent≤Co≤50 weight percent, 1 weight percent≤V≤3 weight percent, 0 weight percent≤Ni≤0.2 weight percent, 0.08 weight percent≤Nb≤0.12 weight percent, 0 weight percent≤C≤0.007 weight percent, 0 weight percent≤Mn≤0.1 weight percent, 0 weight percent≤Si≤0.1 weight percent, up to 0.5 weight percent impurities selected from the group consisting of one or more of Cr, Cu, Mo, Al, S, Ti, Ce, B, N, Mg, Ca, P and mixtures thereof, remainder Fe;
- cooling and solidifying the melt and forming a blank;
- hot rolling the blank followed by
- cold rolling the blank, and subsequently
- annealing at least a portion of the blank at a temperature in the range of 730° C. to 880° C. for a time sufficient to obtain a soft magnetic alloy having a yield strength (0.2% strain) of between 200 MPa and 450 MPa in an annealed state, either a resistivity of at least 0.4 μΩm, or an induction B(8 A/cm) of at least 2.12 T, or both, and wherein in an annealed state, the soft magnetic alloy comprises a yield strength (0.2% strain) that lies within ±10% of a linear function of yield strength (0.2% strain) against annealing temperature at a given annealing time over an annealing temperature range of 730° C. to 900° C.
Dependencies are inferred from the claim text.