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PTA Welding Overlay TC Bearing TC bearing is one of the important parts in screw power drilling tools for oil exploration, which mainly bears the radial load generated by the drive shaft during the working process of power drilling tools, and its bearing capacity has a vital influence on the service life of drilling tools. Due to the long-term erosion by the sand fluid, it requires good wear resistance and corrosion resistance, so TC bearing processing needs to take some effective measures to prevent wear. PTA can realize precise deposition of hard alloy (such as WC-Co, Ni-based alloy, Fe-based alloy, etc.) powder. The hardness is usually in HRC 55~65 or even higher, which significantly improves the anti-wear performance of the bearings. Expensive TC bearings can be repaired and used by surfacing, improving material utilization and saving costs. The service life after cladding is usually several times that of untreated bearings, reducing maintenance and replacement frequency.

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