Laser Quenching equipment
Perform phase transformation hardening treatment on the metal surface to improve the hardness, wear ...
Perform phase transformation hardening treatment on the metal surface to improve the hardness, wear ...
Used for surface strengthening, repair, and remanufacturing of components, the coating has high adhe...
Flexible processing of complex curved sheet metal parts, with high cutting accuracy, fast speed, and...
Specially designed for seamless welding of precision plastic components, with a small heat affected ...
When operating in high-temperature formations such as geothermal wells and ultra deep wells, the matrix material of conventional drill bits may soften, leading to premature failure of the wear-resistant zone. Ensuring the hardness and chemical stability of laser cladding coatings at high temperatures is key to expanding their application range.
This study selected cobalt coated tungsten carbide (Co WC) composite powder as the cladding material. The cobalt based bonding phase itself has excellent high-temperature red hardness, and the coating structure can effectively slow down the oxidation and decomposition of WC at high temperatures. By optimizing laser parameters, a dense and uniformly distributed WC cladding layer is obtained.
Perform hardness testing and high-temperature wear testing on the samples at different temperatures (room temperature to 600 ℃). The results show that the hardness of the Co WC cladding layer can still be maintained above HRC 55 at a high temperature of 500 ℃, and the wear amount is much lower than that of the conventional iron-based cladding layer. This proves that laser cladding cobalt coated tungsten carbide coating can meet the demanding requirements of high-temperature drilling conditions and provide reliable tool support for deep resource exploration.
