International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

A two-layer, diamond-hard alloy plate (D-HAP) is the cutting element of a drill bit and consists of a layer of polycrystalline diamond compact (PDC) sintered on a superhard alloy (WC-Co) substrate. The entire D-HAP is manufactured using high pressure and high temperature technology. In the FSBI TISNUM the GY850 multi-punch press with a working reaction volume of ≈135 cm3 is used to create high pressure. In one working cycle, sintering takes place from 2 to 12 (depending on the dimension-type) of the D-HAP, consisting of a PDC with grains of 20-10 microns, impregnated with a binder metal and bonded to a hard alloy substrate, forming the working element of
the drill bit.
The report describes the manufacturing process of various amounts of D-HAP in one working cycle and the results of the study of the profiled contact layer (interface) of the diamond layer with the substrate and the presence of defects in this layer.

Two-layer diamond-hard alloy plate is the cutting element of the drill bit and consists of a layer of polycrystalline diamond compact (PDC) binded with the superhard alloy substrate (WC-Co). PDC tools are now actively used in the drilling of mineral resources for the search and production of hydrocarbons.
Full-scale tests of PDC cutters in PDC bits have shown that their strength, wearability, and especially heat resistance, are determined by the quality of the contact layer (interface) between the PDC and the substrate. In the work, the interface of the diamond layer and the substrate of two-layer diamond plates made on the installation based on a multi-punch press GY850 was investigated by laser-ultrasonic flaw detection.