Effects of Alternating Magnetic Parameters on Hardness of W6Mo5Cr4V2 High-Speed Steel

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.