1. High hardness: M4 high-speed steel has excellent hardness and can maintain high cutting performance under high-speed cutting conditions.
2. Good wear resistance: M4 high-speed steel has good wear resistance and can maintain a long service life during the cutting process.
3. Excellent thermal stability: M4 high-speed steel can still maintain high hardness and cutting performance under high temperature conditions, and is suitable for high-speed cutting.

Laser cladding refers to the process method of placing the selected coating material on the surface of the coated substrate in different feeding methods to melt a thin layer on the surface of the substrate at the same time, and forming a surface coating with very low dilution after rapid solidification, and forming a metallurgical combination with the substrate to significantly improve the wear resistance, corrosion resistance, heat resistance, oxidation resistance and electrical characteristics of the base surface. Thus, the purpose of surface modification or repair is achieved, which not only meets the requirements of specific properties of the material surface, but also saves a lot of valuable elements.

Compared with surfacing welding, spraying, electroplating and gas deposition, laser cladding has the characteristics of small dilution, dense structure, good combination of coating and matrix, many suitable cladding materials, and large changes in particle size and content, so the application prospect of laser cladding technology is very broad.