Sandwich-type PCD cutting tool blanks, also known as sandwich-structure composites, feature a polycrystalline diamond working layer bonded between two cemented carbide substrates. These substrates absorb and buffer stress when the tool is subjected to sudden impact or interrupted cutting loads, effectively protecting the PCD working layer. As a result, sandwich-type PCD composites are particularly suitable for heavy-duty machining and interrupted cutting under demanding conditions.
In addition, the axis-symmetric sandwich structure minimizes residual deformation stress during synthesis in a cubic press. During brazing and operation, thermal and mechanical deformation are more evenly distributed, ensuring superior structural stability. This makes them especially suitable for double-sided use or precision machining applications requiring high overall thermal stability.
Our sandwich-type PCD blanks cover a grain size range from 1 μm to 35 μm, including the F-series for general-purpose applications and the H-series for enhanced wear resistance. The blanks are available with diameters exceeding 55 mm, featuring a uniform, defect-free PCD layer. Standard inventory is readily available, and both the PCD layer thickness and overall blank thickness can be customized. According to customer requirements, the blanks can be cut into any insert geometry for delivery.
