Polycrystalline cubic boron nitride is the material second only to diamond in hardness among known materials, but its thermal stability is extremely high, and it can maintain a high stability at 1400℃ under normal conditions. Its synthesis process is mainly completed by high temperature and high pressure in two stages:
The first stage, under very high pressure and temperature conditions, the hexagon boron nitride to cubic boron nitride.
In the second stage, polycrystalline cubic boron nitride (PCBN) was synthesized from cubic boron nitride powder and binder (such as TiN,TiC, etc.). The synthesized polycrystalline cubic boron nitride has superior properties, it does not react with non-ferrous metals, and can be used to process steel and cast iron with hardness of 45-70HRC, as well as wear-resistant and difficult-to-process materials with lower hardness. PCBN material has superior wear resistance and red hardness, its wear resistance is 50 times of ordinary hard alloy, coating hard alloy 5 to 10 times, ceramic 2 to 5 times, more importantly, PCBN has a high red hardness, even to 1500℃, PCBN can still maintain close to the temperature of 40% hardness, is a rare tool material. PCBN material has excellent thermal conductivity, which can quickly carry the heat generated by cutting through the tool body, maintain the original performance of the tool and ensure the machining accuracy.
PCBN cutting tools main application areas are: hardened steel, pearlitic gray cast iron and chilled cast iron, sintered iron, super alloy, manganese steel, powder metal, iron, etc., specific to the actual application such as automobile engine cylinder block and the brake pads on the gray cast iron used in the processing, the air shaft or 718 steel used in the combustion chamber, bearing and the bearing ring (hardness between 58 and 60 hardened steel), manufacturing tool steel or hardened steel used in the gear shaft, surface hardening material such as Co - Cr - or nickel base alloy, oil equipment, pipeline and valve products and so on.
PCBN materials as a kind of excellent cutting tool material and its market potential is tremendous, at the current PCBN cutting tool market share estimates that each year in the future market growth will remain above 2 digits, PCBN cutting tools in addition to partly replace existing coating and ceramic cutting tool will also expand their territory, such as high hardness material processing, ceramic cutting tools and coating tool can't processing, PCBN cutting tools can play alone. The bright future of PCBN tools is worth looking forward to.