PCD is commonly known as the “artificial diamond”, PCD is a top-quality material for wire drawing dies. Its working life is 15-25 times the working life of tungsten carbide dies so that improving efficiency and saving cost for users.
Polycrystalline Diamond (PCD) Wire Drawing Dies that can be used for a wide range of drawing applications. PCD Dies offer a high resistance to wear and an excellent wire surface finish. The dies can be used in ferrous and non-ferrous wire drawing applications.
What kinds of drawing die core materials?
The drawing core is the core component of the diamond wire drawing die, which can be divided into a PCD (polycrystalline diamond) Core, CVD Diamond Core, and Single-crystal Diamond Die Core three categories.
The common brushed core models in the market include SD, CXD, and CXT series. The success of PCD has brought great changes to the wire draw industry, which makes the entire processing process more efficient and stable. The PCD is sintered by the micrometer diamond particles and the binding agent to be sintered under high temperature and high-pressure conditions, the hardness is high, the wear resistance, the impact resistance is strong, and the advantages of uniform wear and long life during the mold use are applicable. High-speed draws. Since the PCD presents isotropic in macro, it does not occur like a single crystal diamond and a phenomenon of unevenness and the phenomenon of the mold hole. In addition, since the price of PCD is much lower than that of single-crystal diamonds, it has been widely used in the brushed industry. Most diamond drawings are used using a PCD brushed mold. The PCD core can be divided into cobalt-based and silicon groups. The cobalt-based PCD core contains a metal-binding agent, which has good processability, can be processed using a process of an electric spark, laser, ultrasonic wave, but the presence of cobalt makes diamonds easy to occur in high temperatures, so the core Suitable for processing and use under conditions below 650 degrees Celsius. The silicon-based PCD core processability is relatively poor, but there is no metal-binding agent in the material, and thus the material can still maintain good thermal stability under 1000 degrees Celsius.
CVD Diamond Core
CVD diamonds are also known as chemical vapor deposition diamonds, which are carbon-containing gas under high temperature and low-pressure conditions, depositing pure diamonds grown on the surface of the solid substrate. The CVD diamond has high hardness, good wear resistance, low friction coefficient, high surface finish, can be made of 0.02-1.0mm aperture drawing, for drawing stainless steel wire, tungsten wire, molybdenum wire, copper wire, aluminum wire, etc. Since the CVD diamond does not contain any binding agent, the CVD diamond brushed mold exhibits higher abrasion resistance, corrosion resistance, thermal conductivity, and thermal stability compared to the PCD. The disadvantage of this product is that its toughness is not as good as PCD, weak impact resistance, cracking, and brushed mold preparation is also strict than PCD.
Single Crystal Diamond Core
The single-crystal diamond has a high hardness and excellent wear resistance. The surface of the wire is tapered is high, but since the structure has an anisotropy, the hardness is also anisotropy, so that the wear of the mold hole is not Uniform, the product is not round, and the resources are rare, the price is expensive, and the fine line drawing die or finished drawing die is generally used as a high surface quality requirement. The single-crystal diamond brushed core is divided into two types: natural diamond brushed mold and artificial single-crystal diamond brushed mold core.