The effect of pulsed magnetic field on friction and wear properties of high speed steel tool materials

The effect of pulsed magnetic field on the friction and wear mechanisms of high speed steel (HSS) cutting tool material W9Mo3Cr4V is investigated. The wear rate, friction coefficient and surface morphology of HSS material are detected under the different conditions of magnetic field strength, frequency and magnetization time in the pulse magnetization friction experiments. The experimental results show that the pulse magnetization treatment results in the improved wear resistance of HSS, the reduced friction coefficient, and the flat friction surface topography. Especially in certain parameters of pulsed magnetic field, the effect of HSS magnetization treatment is better with a lower coefficient of friction and better wear resistance. The comparative analysis of microstructures before and after magnetization treatment shows that a large number of dispersed carbides in the material are separated out after magnetization treatment. Dispersion strengthening is the main mechanism of pulsed magnetization treatment to enhance the wear resistance of the material.