高锰钢具有高的韧性、塑性以及表面硬化层。在其上攻丝是较困难的。加工高锰钢的新型丝锥如图所示。其特点是,仅在切削部分开有切屑槽。切削部分长度L_2=L_1+(1.1～1.5)P。切屑槽深度由端面向校准部分减少,并同轴线成18°～20°的倾角,切削部前端的直径d_3=(0.4～0.45)d。切削 High manganese steel with high toughness, plasticity and surface hardening layer. Tapping on it is more difficult. New high-manganese steel processing taps as shown. Its characteristic is that only the cutting part of the open chip flute. Cutting part length L_2 = L_1 + (1.1 ~ 1.5) P. Chip flute depth from the end to the calibration part of the reduction, and the coaxial line at an angle of 18 ° ~ 20 °, the diameter of the front cutting d_3 = (0.4 ~ 0.45) d. Cutting