The application of laser cladding wear-resistant materials on the "shield cutter ring" is an advanced manufacturing process, which uses laser cladding technology to cladding nickel-based tungsten carbide composite powder on the hob cutter ring of the shield machine to create a cladding layer with superior wear resistance, high hardness and good toughness.
In the working process of the disc cutter of the shield machine, especially when the upper soft, lower hard or composite formation, the rock breaking mode of the disc cutter changes, which is not only friction and extrusion to break the rock, but also needs to collide with the rock formation. This force makes the cutter ring surface of the hob cutter have high hardness and wear resistance, and at the same time have strong internal toughness.
In order to solve this problem, the characteristics of laser cladding technology can be used to clad a layer of hard material on the softer and harder cutter ring, so as to improve the wear resistance of the cutter ring without changing the toughness of the cutter ring itself. The cladding wear-resistant layer makes the cutter ring have the characteristics of high hardness and high wear resistance at the same time.
In the face of complex geological conditions, the laser cladding shield disc cutter ring can effectively reduce the wear of the cutter ring and prolong the service life of the disc cutter. The research and development of this technology is of great significance for increasing the tunneling speed of the shield machine and reducing the construction cost.