Comprising inner and outer bearing sleeves, TC bearings have the inner sleeve tightly connected to the drive shaft, while the outer sleeve is linked to the drill. They are responsible for transmitting power from the motor to the drill bit. In their long-term operation, these bearings not only endure considerable axial and radial forces but also continuously withstand the erosion and wear from various liquids and sediments. This requires them to possess excellent wear and corrosion resistance. To address this, we use plasma hardfacing to deposit wear-resistant material on the surface of the bearing sleeves, along with plasma surface hardening techniques.