The Effect Of Temperature On Magnetic Hysteresis Properties Of Hard Magnetic Material Steel

Abstract

Steel is one of the representative ferromagnetic materials with hard magnetic type. The aim of this study was modeling the effect of temperature on magnetic hysteresis loop parameters of steel, because of exceptional characteristics steel based composition have been the focus of considerable investigation among ferromagnetic material. The parameters curie temperature, critical exponent, saturation magnetization at room temperature were used in the modeling to obtain the magnetic hysteresis loop in this study, which was done using MATLAB program. The steps followed in the modeling temperature dependence of magnetization, temperature dependence of coercive field and the dependence area of steel were appropriate modeling function for each plot were described. Next, MATLAB coding was used for function by setting all of the necessary in puts and finally the output result was displayed. On the parameters of magnetic hysteresis loop of steel, temperature dependence of magnetization, coercive field, flux density and the hysteresis loop of magnetizing force and flux density of steel were investigated. So, as the electric field increases coercive field, saturation magnetization, flux density and area of the magnetic hysteresis loop of steel all increases. On the other hand the coercive field, saturation magnetization, flux density and area of the magnetic hysteresis loop of steel all decreases when temperature rises. Generally, The value of saturation flux density(Bs =1.1T), Coercive field (Hc = 50kA/m) , Remanent flux density (Br= 0.35T ) and the result shows that, Steel is a hard magnetic material with high residual flux, large coercive force and large hysteresis losses. It is suitable for making permanent magnets and the shape of the B-H curve indicates how relative permeability of the material changes along with the magnetic flux density and magnetizing force.