| Title |
Microstructures and Magnetic Properties of Fe - Cr - Co Permanent Magnetic Alloys by Deformation Aging |
| Authors |
송기창(Ki Chang Song); 박종완(Jong Wan Park) |
| Abstract |
Improvements of magnetic properties of Fe-Cr-Co permanent magnets by Ti and Cu addition and deformation aging were investigated. Sheet magnets of the Fe-CrCo base alloys were produced through the deformation aging processes consisting of primany aging for spinodal decomposition, intermediate cold rolling, and final aging. The microstrucures of the alloys were studied by TEM and the magnetic properties were measured by VSM. The addition of Ti increased B, and (BH)_(max) by suppressing the precipitation of a nonmagnetic second phase during the final aging. iHc was also increased by Cu addition. The addition of both Ti and Cu resulted in the highest enhancement of the magnetic properties after continuous cooling at 40℃/h rate and isothermal holding at 610℃ for 2 hours. |