基于前期采用Ansoft有限元分析软件对自制磁能强化装置进行建模仿真的基础上，通过正交试验的方法系统研究了磁场频率、励磁电压、磁化时间和磁场方向对W6Mo5Cr4V2高速钢硬度的影响规律，得到了最佳的交变磁处理参数，并对最佳参数下处理的高速钢组织进行了观察。结果表明：交变磁处理可使高速钢的硬度提高4.6 HRC;最佳的交变磁处理参数为磁场频率5 Hz，励磁电压30 V，磁化时间60 s，试样被测表面和磁力线在同一个平面上;磁场频率和励磁电压对硬度的影响最大，磁场方向和磁化时间的影响较弱;经最佳参数交变磁处理后，碳化物的分布更加均匀,且尺寸更小，从而使得高速钢的硬度提高。

Based on modeling and simulating results of self-made magnetization unit using the finite element analysis software Ansoft, the effects of magnetic field frequency, excitation voltage, magnetization time and magnetic orientation on hardness of W6Mo5Cr4V2 high-speed steel were studied by orthogonal experiment method. The best alternating magnetic parameters were achieved and microstrucute under the best magnetic parameters were observed. The results show that alternating magnetic treatment could enhance the hardness of high-speed steel by 4.6 HRC. The optimal alternating magnetic parameters as followed: magnetic field frequency was 5 Hz, excitation voltage was 30 V, magnetization time was 60 s, measured surface of the sample was on the same plane with the magnetic field line. Magnetic field frequency and excitation voltage had the largest influence on hardness, and magnetic orientation and magnetization time had relative weak influnce. After alternating magnetic treatment with the best parameters, the hardness of high-speed steel increased due to more homogeneous and smaller carbides.