Fire grate, as a key part of the waste incinerator, is one of the most important factors to restrict the waste incinerator’s working efficiency. The fire grate material SN24T-1 which is manufactured by Shanghai Power Equipment Research Institute, is using in power plants. To meet the high-performance of fire grate, SY steel, a typical hard-machine material, is choosed. The low cutting parameters and serious tool wear are key factors constraining the high-efficiency, low-cost while milling the SY steel. Obje...