Laser cladding acts on the disc cutter ring of the shield machine.
Disc disc cutters for a wide range of applications.
The disc disc cutter is an excavation tool for crushing hard rock, which is installed at the head of large trenchless construction equipment such as shields, TBMs, pipe jacking, etc., and its function is to cut the rock of the tunnel face and peel the rock off the tunnel face. It is widely used in the construction of subway tunnels, railway tunnels, water diversion tunnels and urban underground pipe networks.
Disc cutters are susceptible to wear.
The disc cutter is a type of cutter ring that can be replaced, usually divided into single-edged, double-edged and multi-edged, and is often installed on the cutterhead of the shield machine in a radial or spiral shape. The cutter head of the shield machine excavates forward under the pressure of the jack, and the cutterhead of the shield machine rotates at the same time, and the cutter installed on the cutterhead of the shield machine rotates with the cutterhead at the same time, and rotates under friction and pressure, so as to produce a rolling cutting effect on the rock surface by using the cutter ring cutting edge.
The hardness and wear resistance of the disc disc cutter are insufficient, and it is very susceptible to wear, and the disc disc cutter operates under very harsh working conditions, which makes the disc disc cutter fail and cannot be used, resulting in the short service life of the disc disc cutter.
Laser cladding improves performance.
We use the process of laser cladding to strengthen the surface alloy of the disc disc cutter at room temperature, increase the wear resistance and corrosion resistance characteristics of the disc disc cutter, improve the hardness of the disc disc cutter, and increase the service life of the disc disc cutter.
In order to improve the wear resistance of the disc cutter, the laser cladding test was carried out, and finally the high wear-resistant alloy cladding layer was prepared on the surface of the disc disc cutter substrate.
The laser cladding coating and the substrate are a firm metallurgical bonding layer, and the laser cladding coating optimized by the process has a dense structure, no cracks and porosity, and the cladding layer is thick, strong and tough, which is a green and environmentally friendly process technology.
The wear resistance of the disc disc cutter strengthened by laser cladding technology is 5 times that of ordinary materials, which greatly improves the service life of the disc disc cutter and has extremely high economic benefits.