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以还原铁粉为原料,在不同温度下进行热处理,然后在500 MPa下压制获得铁粉基软磁环状样品,分析了样品的静态磁性能和交变磁场下的磁性能和损耗。结果表明:还原铁粉在700℃下保温30 min,软磁样品的静态磁性能明显提高,初始磁导率和最大磁导率均增加1倍以上,粉末的显微硬度从61下降到51,粉末压缩性能得到改善,样品的密度提高了0.3 g/cm3;在此温度下对粉末热处理,还能降低软磁样品的矫顽力,提高样品的振幅磁导率,减小磁滞损耗,从而改善交变磁场下材料的软磁性能。
The reduced iron powder was used as raw material and heat-treated at different temperatures. Then the iron-based soft magnetic ring sample was obtained by pressing at 500 MPa. The static magnetic properties and the magnetic properties and losses under the alternating magnetic field were analyzed. The results show that the static magnetic properties of the soft magnetic samples increase obviously when the reduced iron powder is incubated at 700 ℃ for 30 min, the initial magnetic permeability and maximum magnetic permeability both increase more than 1 time, the hardness of the powder decreases from 61 to 51, The compressibility of the powder is improved, the density of the sample is increased by 0.3 g / cm3; the heat treatment of the powder at this temperature can also reduce the coercive force of the soft magnetic sample, increase the amplitude permeability of the sample and reduce the hysteresis loss, Improve the Soft Magnetic Properties of Materials under Alternating Magnetic Field.