Vermicular graphite cast iron (CGI) is the latest in the automobile parts used in manufacturing a new type of cast iron materials. Vermicular graphite cast iron in a coral reef or worm-shaped, metallographic structure would not be as grey cast iron, will reside in the processing and production increased stress fracture lines, but not as ductile iron, causing the loss of thermal conductivity. This feature enables the compacted graphite cast iron engine manufacturers as a high intensity component materials. Between the processing of ductile iron and gray iron brittle ductile between the chip for some of fracture. CGI for the thermal conductivity of gray cast iron 78%, which would increase the thermal tool wear effect; CGI scalability, and the tensile strength and fatigue strength is about twice the gray iron, it would have to make it easier to Burr. Germany Walter cast iron processing company for research and development of the so-called "tiger blade" Tiger "Tec technology, and this technology will be extended later to steel, stainless steel, hard materials processing, and other fields. Tiger blade signs of bicolor Tu layer, for the different processing flank before and after the use of different characteristics of coatings to improve on the compacted graphite cast iron processing. Sandvik Coromant the GC1020 have a titanium aluminum nitride coating physical, in a hard Basal and respond to different blade processing performance required toughness necessary to achieve the balance between, thereby improving vermicular graphite cast iron processing. Kennametal in cast iron processing, in addition to launch such as KC9315 carbide blade coating, but also promote the use of nitrogen silicon such as pure silicon nitride ceramic blade KY3500 to adapt to the higher processing speed.