Effect of Magnetic Field Strength on Carbide Precipitation Behavior in W<sub>6</sub>Mo<sub>5</sub>Cr<sub>4</sub>V<sub>3 </sub>High Speed Steel during Medium Temperature Tempering

Effect of magnetic field strength on carbide precipitation behavior in W6Mo5Cr4V3 highspeed steel during medium temperature tempering was investigated. The applied magnetic field promoted the precipitation and refinement of M6C and MC carbides at boundaries and in the grain interior, but maximum spheroidization occurred for those M6C carbides precipitated at boundaries, the stronger the magnetic field strength, the stronger the spheroidization effect. The high magnetic field hinders the precipitation of M2C type carbides, and the M2C type carbides basically disappear when applying the magnetic field.