US 12,291,763 B2
High-strength and tough multi-component soft magnetic alloy and preparation method thereof
Zhiming Li, Changsha (CN); Penghua Ge, Changsha (CN); Dingshun Yan, Changsha (CN); Kefu Gan, Changsha (CN); and Yong Zhang, Changsha (CN)
Assigned to Central South University, Changsha (CN)
Appl. No. 18/704,911
Filed by Central South University, Changsha (CN)
PCT Filed Jul. 10, 2023, PCT No. PCT/CN2023/106580
§ 371(c)(1), (2) Date Apr. 25, 2024,
PCT Pub. No. WO2024/082723, PCT Pub. Date Apr. 25, 2024.
Claims priority of application No. 202211294689.4 (CN), filed on Oct. 21, 2022.
Prior Publication US 2024/0327959 A1, Oct. 3, 2024
Int. Cl. C22C 30/00 (2006.01); C22C 1/02 (2006.01); C22F 1/16 (2006.01); H01F 1/147 (2006.01)
CPC C22C 30/00 (2013.01) [C22C 1/02 (2013.01); C22F 1/16 (2013.01); H01F 1/14708 (2013.01); C22C 2202/02 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A multi-component soft magnetic alloy, comprising the following components in atomic percentage: Fe 32-45%, Co 24-29%, Ni 24-29%, Al 2.5-8%, Ti 1.5-3.5%, Ta 1.0-5%, Nb 0.5%, and Mo 0-2%;
wherein a sum of the atomic percentages of Al, Ti, Ta, Nb, and Mo is ≤16% and ≥5%;
a sum of the atomic percentages of Fe, Co, and Ni is ≥84% and ≤95%;
wherein the soft magnetic alloy is a face-centered cubic (FCC) solid solution structure;
(i) tensile yield strength of 350 to 1350 MPa;
(ii) tensile strength of 600 to 1850 MPa;
(iii) fracture elongation of 15 to 70%;
(iv) saturation magnetization of the alloy from 90 to 140 A·m2/kg;
(v) coercivity of 40 to 650 A/m.