Experiments, analysis and parametric optimization of roll grinding for high-speed steel W6Mo5Cr4V2

Due to the rapid development of the modern industry, people have higher and higher requirements on the rolling speed and quality of steel. The performance of conventional cast-iron roll cannot supply production demands because it contains higher chrome-nickel elements. The high-speed steel W6Mo5Cr4V2 with high service life, red hardness and wear resistance becomes a promising material of roll. However, the above characteristics bring great difficulties to roller repairing. Within this study, the high-speed steel W6Mo5Cr4V2 was processed with roll grinding at various grinding conditions (grain size, workpiece speed and depth of grinding) by using Taguchi design method, and the grinding process parameters are analysed and optimized according to the values of surface roughness and the depths of microhardness alterations. To obtain the optimized parameters, the values of surface roughness and microhardness alterations were analysed with grading methods of synthesizing multiple guidelines. Also, a confirmatory test was done to confirm the optimized parameters obtained from the above methods. The results of this work may provide the knowledge/database of the roll grinding process of high-speed steel W6Mo5Cr4V2 at given grinding parameters.