PCD Cutting tools
With the development of large-diameter diamond composite sheets, the use of diamond things has also expanded to industrial mass production, especially in the car and carpenter professions, diamond is replacing the traditional cutting things because of its excellent characteristics. PCD Cutting tools diameters can currently reach 74mm. Because PCD diamond composite sheets have the advantages of stable function and common cost-effectiveness, the data is also very agile in other fields. The following are suitable materials for processing with PCD:
Particleboard, fiberboard, shredded board and high-hardness natural wood Metal
matrix composite information
Aluminum alloy
Copper, brass, bronze, magnesium alloy
ceramic, glass fiber, carbon fiber
plastic, rubber
Pre-sintered and sintered tungsten
carbide mineral deposits
Cubic boron nitride is an excellent tool for processing quenched ferrogroup metals and alloys. However, because the composition of CBN is completed under high temperature conditions, it is difficult to obtain high-quality large-particle CBN single crystals due to the constraints of high-pressure chambers and the difficulties caused by composition technology. The scale of CBN single crystal is usually below 0.5mm, and the size of Z is not more than 3mm, so it is too small for use as a tool. Secondly, although the cubic boron nitride single crystal is very hard, it is affected by the crystal cleavage mechanism and is not ideally reflected in some processing and use. In this case, CBN polycrystallization, especially polycrystalline composite sheets with substrates, came into being. Its emergence is to solve the scale problem of CBN, and second, because these data are attributed to polycrystalline tissue, there is no cleavage problem, so that the toughness of CBN has been greatly improved. CBN polycrystallization has also been carried out with agility because of this. Is L-Carnitine useful to go blackheads to wrinkle eye cream eyeliner Which eye cream good day cream neck cream which good bb cream what brand of hair removal good with
PCBN knife
Binders for CBN polycrystal: The information used for CBN polycrystalline binders is very extensive, roughly divided into the following three categories: (1) metal or alloy binders, such as nickel, cobalt, titanium, aluminum, copper, etc. and their alloys; (2) Cermet binder composed of metals, alloys and ceramics, which contains carbides, nitrides, borides, silicide series cermets, such as titanium carbide, zirconium carbide, boron carbide, titanium nitride, titanium boride, aluminum silicide, etc.; (3) Non-metallic and boron nitrogen compounds, such as silicon, Me 3 B 2 N 4 ( Me is alkaline earth metal) and so on.
CBN composite sheet: Although the cubic boron nitride polycrystalline without substrate overcomes the anisotropy of single crystal cubic boron nitride and the characteristics of small crystal scale, there are problems of connection and welding when making tools. Direct welding of a cube boron nitride polycrystalline sintered body that is hard and brittle and not easily moisturized and bonded by usual solder is actually very difficult. Solder with low melting point and easy to weld often lacks sufficient mechanical strength, and the suitable solder with high melting point has the danger of deteriorating the polycrystalline function or even incineration when welding (cubic boron nitride is in a metastable state at high temperature and atmospheric pressure, unstable). The cubic boron nitride fine particles and additives and cemented carbide substrate are sintered under high temperature and high pressure conditions to form a square boron nitride composite sheet, which successfully solves this problem, and the use of PCBN composite sheet is more convenient.
