| Cutting tool materials is decided to tool cutting performance, especially the foundation of the cutting efficiency and reliability. "Suit the remedy to the case", according to the characteristics of the workpiece (material, machining allowance, batch, performance requirements, etc.) development to match the specific cutting tool material is one of today's development trend. Cobalt high speed steel, powder metallurgy high speed steel, cemented carbide (including ultra-fine grain cemented carbide, ceramic and metal ceramic materials on the nc cutter to get the rapid popularization and wide application. Especially nc knives, indexable not heavy knife slices with cemented carbide grades has developed rapidly in recent years, the main fraction. Cemented carbide materials significantly improved the tool cutting mechanical properties (strength, hardness). For complex molding CNC gear cutting tools, cobalt high speed steel and high speed steel powder to replace the traditional the trend of high speed steel. As non-ferrous metal materials, organic materials even wood machining such as an increase in demand, especially the car (cylinder block, cylinder head, piston, etc.), aerospace, military industry, the development of the furniture manufacturing industry, silicon aluminum alloy, aluminum and magnesium alloys, composite honeycomb material parts and machining of hardened, promoted the polycrystalline diamond (PCD), cubic boron nitride (CBN) superhard cutting tool materials such as the progress of manufacture technology. Dry cutting technology to the promotion of the environmental protection requirement, and trace the cold liquid and low temperature air cooling technology arises at the historic moment, the cutting tool material and coating) forward new demands for high temperature resistance, good red hardness of high temperature, high temperature resistance to adhesive, high temperature friction properties for dry cutting, such as the use of nc tool performance is very important. |