Laser cladding technology is a new technology with high economic benefits, which can prepare high-performance alloy surfaces on cheap metal substrates without affecting the nature of the substrate, reduce costs and save precious and rare metal materials, therefore, the world's industrially advanced countries attach great importance to the research and application of laser cladding technology. The application of laser cladding is mainly in two aspects, i.e. corrosion resistance (including high-temperature corrosion resistance) and wear resistance, with a wide range of applications, such as the sealing surfaces of valves and valve seats of internal combustion engines, and laser cladding of water, gas or steam separators.

The laser cladding head mainly consists of: a linking component, an optical component and a powder feeding component. Through the laser cladding head, the laser equipment is linked with the powder feeder, and through the high-energy laser beam, the coating is quickly scanned and processed by the pre-positioned powder, which is instantly melted and solidified, and the base metal is then melted into a thin layer, and the interface between the two rapidly produces molecular or atomic level interactive diffusion in a very narrow area, and at the same time, a strong metallurgical bonding layer is formed, which significantly improves the properties of the substrate, such as hardness, resistance to flagging, and corrosion resistance. etc.

The laser cladding head mainly provides laser path transformation and focusing for laser cladding, generates sufficient energy density to melt metal powder, and is divided into straight and twisted types according to different optical paths. A protective mirror module is set above the collimation module to protect the fiber plug from contamination of the collimation lens during insertion and removal; a protective mirror module is set below the focusing module to protect the focusing lens from sputtering during the melting process.

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