Grade: GE1 Tensile strength: 2000 Hardness: 91.0 Usage: suitable for low-speed roughing and non-metallic materials resistant to wear watches gear parts. In the iron-base heat-resistant alloy turning GH132 (f62 ~ f400mm) end face, the same cutting n1 = 45r/min, ap1 = 1.0mm, f = 0.15mm / r condition, the tool wear away after each knife is: YM051 is 0.1mm, YS2 is 0.21mm, YG8 to 0.35mm; when n2 = 60r/min, ap and f values ??constant, respectively 0.1mm, 0.25mm and 0.27mm. When the turning its cylindrical, with the same cutting n = 20r/min, ap = 0.8, f = 0.07mm / r, and the conditions of use of the cutting fluid, the original use of high-speed steel tool sharpening can only every processing one, but can not guarantee taper; YG8 turning prone to collapse with knives, sharpening can only process one time; while the use YS2 or YM052 turning, grinding time can be processed after 2 to 3, and can better ensure the taper and the surface roughness of the workpiece.