Experimental analysis on cutting parameter and wear mechanism of tool in turning of pearlitic gray cast iron with Al additives

WU Gao-yang1, LIU Guang-jun1, YU Zi-yi2
(1.School of Mechatronics Engineering, Tongji University, Shanghai 201804, China;
2.SAIC Volkswagen Co., Ltd., Shanghai 201805, China)

Abstract: Aiming at the problem of cutting parameter selection and tool wear mechanism of cutting pearlitic gray cast iron with Al additives using coated carbide tool, through three factors and three levels orthogonal test, the evolution law of roughness and wear of tool flank under different cutting parameters was firstly studied. Then according to the regression model of the mean and fluctuation of the roughness and the ANOVA of tool wear, the cutting parameter optimization model that took into account machining efficiency, roughness and tool life were put forward. The best cutting parameters were gotten. Finally, the wear mechanism of the cutting tool flank was studied by using SEM and EDS. The results show that under the same cutting efficiency, the fluctuation of the optimized workpiece roughness decreases by 60% and the tool wear rate decreases by 35%. The adhesive layer forms wearresistant oxides during cutting.

Key words: coated carbide tool; pearlitic gray cast gray iron with Al additives; optimization model of cutting parameters; adhension of the flank