Polycrystalline Diamond Compact

The thin layer of polycrystalline diamond bonded to the cemented carbide substrate attached to the composite material called PDC, codenamed PDC. Polycrystalline

Diamond PDC both extremely high wear resistance and high impact carbide and diamond layer can always maintain a sharp cutting edge, and thus in the petroleum and

geological drilling in soft to medium hard formations, the effect very good. The diamond content of the composite sheet up to 99%, the diamond layer of high hardness,

excellent wear resistance, the Knoop hardness (6 5 ~ 7) × 104 MPa or even higher. Its thickness is thin, the general control 05 to 1 mm. Vertical inserts welded to

the drill bit, and its sharp edge and is always self-sharpening, also known as micro-cutting with the drill bit. Composite sheet in his own superiority, development

and production of competing at home and abroad, but also a lot of varieties and specifications. PDC current direction of development are: 1, polycrystalline diamond

layer constantly thicker, less than 1mm from the initial development to the present 2-4mm, product life increases. 2, diamond grain is getting smaller, wear resistance

and impact resistance overall performance improved. 3, by optimizing the process or off Co, increase the heat-resistant layer and other processes, to improve thermal

stability. 4, the interface structure optimization, to improve the interfacial stress. 5, the product continued to increase in diameter, to improve the efficiency of

synthesis. 6, to improve the sintering effects, reduce the performance difference. synthetic diamond composite film is superhard material class, the super-word is not

specific, a wide range. Superhard materials is Rockwell hardness (HR), Brinell hardness (HB), Vickers hardness (HV) high material. Just general HR 45 # 30-60, the

hardest natural diamonds. This concept covers a wide range, high hardness steel, high hardness ceramics, artificial diamonds, etc. can be considered.