Application Potential of Ultrafine Cobalt Carbide is in geological engineering

       WC-based cemented carbide, due to its high hardness, high abrasion resistance and 

relatively high fracture toughness, has been used since its invention in 1923, that is, in 

the field of geotechnical engineering, for the preparation of rock drill bits and drilling 

Wear parts.

In order to improve the drilling of the broken rock efficiency and wear life of various 

hard alloy wear parts, with the development of science and technology, many new types of 

cemented carbide have emerged.

By studying the failure mechanism of the typical WC-Co cemented carbide drill bit in the 

process of using and the development status of the superfine WC-Ni cemented carbide and the 

metal-free bonded phase cemented carbide, the ultra- Application potential of quality alloy 

in geological engineering.

The use of Ni instead of Co as a metal binder, the prepared carbide has a higher corrosion 

resistance and oxidation properties, making the drill in the corrosive environment, the 

service life has been greatly improved.

With the application of ultrafine powder preparation technology and electric field assisted 

sintering technology, it can be prepared by using ceramic phase as binder, even without 

binder sintering to prepare ultrafine metal-free bonded phase cemented carbide.These new 

materials not only greatly improve the hardness and wear resistance of the alloy, but also 

improve the corrosion resistance of the alloy oxidation.

Compared to the typical WC-Co cemented carbide, the fracture toughness of the metal-free 

bonded phase cemented carbide has been reduced; however, studies have shown that by 

refining the grain, improving the microstructure and adding the second phase to 

strengthening can be significantly reduced Alloy hardness wear resistance of the case, a 

good increase in the metal-free bond phase carbide toughness.