Composites of cemented carbide and superabrasives are versatile and important because of their unique properties. These composites combine the high hardness of cemented carbide with the high strength of cemented carbide, resulting in excellent machinability. The synthesis of large-size composites is made possible by large-bore six-sided presses operating at ultra-high pressures and high temperatures. The main polycrystalline composites of BN(china) Technology in this field are polycrystalline cubic boron nitride composites with a diameter of φ60 and polycrystalline diamond composites with a diameter of φ55.

Polycrystalline cubic boron nitride (PCBN) composites

By combining polycrystalline Cubic Boron Nitride (CBN) micropowder and cemented carbide substrate as the core raw materials, the sintering process is carried out under extreme ultra-high pressure and high temperature, which realizes the solid growth of the CBN layer on the cemented carbide substrate. This innovation not only skillfully combines the excellent hardness, outstanding wear resistance and high chemical stability of cubic boron nitride, but also makes full use of the easy welding and machining characteristics of cemented carbide. The hardness of the Cubic Boron Nitride layer reaches HV3500~HV6000, which shows a wide and far-reaching application potential in the processing of cast iron, hardened steel and cemented carbide.

Product advantages of BN(china) Technology PCBN composites

▶ The formula and process accumulated over the years, the material wear resistance, uniformity and densification advantages are obvious;.

▶Excellent ultra-high-pressure technology ensures unsurpassed yield and synthesis efficiency in the industry; and

▶ Stable supply of large quantities and a wide range of products, blanks, semi-finished products and fine grinding sheets are available.

Polycrystalline Diamond Composites

Polycrystalline diamond composites are made from diamond micropowders and cemented carbide matrix through a sintering process under extreme conditions of ultra-high pressure and high temperature. During this process, the diamond layer will grow firmly on top of the cemented carbide matrix. This composite material not only inherits the ultra-high hardness, excellent wear resistance and excellent thermal conductivity of diamond itself, but also combines the high strength, excellent impact toughness and good weldability of cemented carbide. In particular, the hardness of the diamond layer ranges from HV8500 to HV10000, a level of hardness second only to that of natural diamond. In addition, compared with monocrystalline diamond, polycrystalline diamond composites effectively overcome the anisotropic easy to disintegrate the defects, so as to have a higher fracture toughness.

BN(china) Technology developed φ55mm polycrystalline diamond composites synthesized through a unique high temperature and high pressure process, the diamond particles are firmly bonded with each other, which has the advantages of high hardness, high wear resistance, high thermal conductivity, low friction coefficient, low thermal expansion coefficient, and small affinity with non-ferrous and non-metallic materials, and so on, and is widely used in the processing of non-ferrous and non-metallic materials.

As the leader of superhard material industry, BN(china) Technology, with more than twenty years of profound accumulation and extraordinary strength, not only makes superhard material shine in many fields, but also shows its persistent pursuit of technological innovation. Looking to the future, BN(china) Technology will continue to rely on its strong R & D capabilities, sparing no effort to promote the innovation of superhard materials technology and the expansion of application boundaries, to strength cast brilliant, leading the industry to a new height.