Tool wear curve cermet cutting tools and carbide tools yg8 chilled cast iron contrast when shown in Figure 2. The figure shows, cermet cutting tools and carbide tools yg8 vary greatly, the initial metal-ceramic tool wear very quickly, in less than three minutes time vb amount of wear is reached 0.4mm, after the wear rate despite the decline but still faster, and there is almost no wear stable period last tool chipping failure.

Cutting test under conditions other cutting parameters found cermet cutting tool life (t) were low (up to several minutes), failure mode is generally chipping or micro chipping. Thus, the cermet cutting tool is not suitable for chilled cast iron, mainly because of lower metal ceramic flexural strength and fatigue strength, chilled cast iron cutting force and cutting force fluctuations are large, so the metal ceramic tool pole Easy chipping failure. And yg8 carbide cutting tools high strength, good toughness, good resistance to mechanical fatigue performance, longer tool life when cutting chilled cast iron. In addition, cutting chilled cast iron, tool geometry is also an important factor affecting tool life. To reduce the chip deformation and cutting force, which normally takes a smaller rake angle and clearance angle, in order not to reduce the strength of the blade, the blade needs to be rounded or milled negative chamfer and edge by grinding eliminate defects.