Open AccessMagnetic properties of the Fe-24%Cr-15%Co-3%Mo-1.5%Ti hard magnetic alloy in anisotropic and isotropic states
Author(s) -
T. A. Vompe,
I. M. Milyaev
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/848/1/012096
Subject(s) - alloy , thermomagnetic convection , materials science , isotropy , isothermal process , anisotropy , annealing (glass) , metallurgy , magnetic anisotropy , thermodynamics , analytical chemistry (journal) , composite material , magnetic field , magnetization , chemistry , physics , chromatography , quantum mechanics
The magnetic properties of the Fe-24%Cr-15%Co-3%Mo-1.5%Ti (in wt. %) hard magnetic alloy in anisotropic and isotropic states after various heat treatments were studied. The alloy was prepared by the methods of powder metallurgy. The relative density was 98 %. The coefficient of thermal expansion of the alloy during heating and cooling was 17, 4*10 6 K −1 and 19, 0 *10 − 6 K 1 in the temperature range of 100 ° C - 1300 °C. The kinetics of o-phase formation caused by an isothermal annealing at T = 750 ºC was investigated by means of the hardness measurements. The best magnetic properties of the alloy in anisotropic state were obtained after thermomagnetic treatment with cooling rate 200 ºC/h as B r = 1.22 T, H c = 42.2 kAm- 1 and (BH) max = 31.2 kJm- 3 and on the alloy in isotropic state with cooling rate 40 ºC/h.