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研究了Fe-25Cr-12Co合金在不同拉速下对定向凝固组织以及磁场施加对合金热处理组织及磁性能的影响。用金相显微镜和TEM对合金的显微组织和结构进行分析,用型振动样品磁强计对合金进行磁性能测试。结果表明,提高拉速有利于减少合金中σ析出相但不利于合金的取向生长。磁场热处理有利于促进α1粒子由颗粒转变为长形状,并且改变合金磁性能,合金在平行于磁场方向的磁性能好于无磁场条件,而合金垂直于磁场方向的磁性能低于无磁场条件。
The effect of directional solidification structure and magnetic field on the microstructure and magnetic properties of Fe-25Cr-12Co alloy under different drawing speeds was investigated. The microstructure and structure of the alloy were analyzed by metallographic microscope and TEM, and the magnetic properties of the alloy were tested by using vibrating sample magnetometer. The results show that increasing the pulling speed is beneficial to the reduction of σ precipitates in the alloy but not conducive to the growth of the alloy. Magnetic field heat treatment is beneficial to promote the transformation of α1 particles from particles to long shape and change the magnetic properties of the alloy. The magnetic properties of the alloy in the direction parallel to the magnetic field are better than those without magnetic field. The magnetic properties of the alloy perpendicular to the magnetic field are lower than those without magnetic field.