Supersonic spray tungsten carbide coating

       Supersonic spraying tungsten carbide coating is a surface strengthening technology, and it has always been a new technology project that my country has focused on promoting. It can be used in equipment maintenance to repair old and waste, make scrapped and processed out-of-tolerance mechanical parts "resurrected", and can also be strengthened and pre-protected in the manufacture of new products to "extend life". After being processed by thermal spraying process, the service life of mechanical parts can be increased several times or dozens of times.

Beijing Nimo Company introduced the relevant process parameters of JP8000 supersonic spraying tungsten carbide coating as follows:

When supersonic spraying tungsten carbide coating, the flame flow (1100 m/s) speed, the impact energy of sprayed particles is large, the powder oxidation burning loss is small, and the coating with high density, high bonding strength and excellent comprehensive performance can be obtained. Bonding strength: ≥70MPa; porosity: ≤5%; coating thickness: 0.1-0.3mm; roughness of unprocessed surface of tungsten carbide coating: Ra3.2-6.3

name	Performance and application	Microhardness	Operating temperature
WC-12Co	Excellent wear and corrosion resistance	950-1350	500℃
WC-10Co-4Cr	Very good corrosion resistance and wear resistance	1000-1400	500℃
WC-10Ni	Excellent corrosion resistance and impact toughness	900-12	500℃
WC-17Co	Excellent bonding strength and impact toughness	900-12	500℃
Cr3C2-NiCr	Excellent resistance to high temperature and abrasion	850-1100	870°C