In the fields of industry, energy, military, machinery-related manufacturing plants, and remanufacturing, the harsh production environment and heavy use load have led to corrosion and wear of some important metal parts. In order to extend the service life of expensive production equipment, the appearance of the metal parts of these equipment must be processed or repaired in advance. At the same time, my country is also the world’s largest producer of hydraulic supports. The pillars and jacks, the core components of hydraulic supports, also require surface anti-corrosion and wear-resistant treatment.
At present, laser pointer cladding technology has been widely used in the repair and modification of metal surfaces. Although traditional laser cladding has the advantages and characteristics of flexible processing, special-shaped repair, and custom additive materials, its work efficiency is low. The demand for large-scale and rapid production and processing cannot be met. In order to meet the needs of high-volume and high-speed production and improve the efficiency of cladding, high-speed laser cladding technology has emerged.
Through the change of the interaction process between the laser and the powder on the surface of the base layer, the powder is jetted into the molten pool at high speed to form a very thin metallurgical layer, thereby achieving the improvement of cladding efficiency and surface quality. At the same time, by adjusting the process and the thickness of the surface cladding layer, the line speed of cladding can reach 50-200m/min, which greatly improves the efficiency of cladding.
High-speed laser cladding-a green remanufacturing process that can replace traditional electroplating technology. Comparison of advantages and disadvantages of traditional methods.
Advantages of high-speed laser cladding
1. Under the same power condition, the cladding area per unit time of high-speed blue laser pointer cladding is nearly 10 times that of traditional laser cladding;
2. The high-speed cladding surface is fine and smooth, and the smooth surface after fine grinding is Ra≤0.8μm, which is very suitable for thin-layer cladding, and the cladding thickness is adjustable about 0.1-0.6mm;
3. The cladding layer and the substrate are metallurgically bonded, and the bonding force is far superior to traditional processes such as spraying and electroplating. High-speed laser cladding is the preferred process for green alternatives to chrome plating;
4. The high-speed cladding bonding layer is more wear-resistant and corrosion-resistant than thermal sprayed coatings and electroplated coatings, and is an ultra-thin protective layer prepared in a metallurgical bond with the substrate;
5. The high-speed laser cladding process has a very low dilution rate on the surface of the substrate (dilution rate <1%), which minimizes the thermal impact of the laser on the substrate, thus realizing the coating preparation of heat-sensitive material parts and avoiding traditional cladding surface defects .
Application of high-speed laser cladding
The high-speed laser cladding technology can realize a dense and defect-free cladding layer. The surface of the cladding layer is dense, metallurgically bonded with the base material, without opening defects, and the surface is smooth and flat. It can be processed not only on the rotating body, but also on flat and complex curved surfaces. Through continuous technological optimization, this technology can be widely used in coal, metallurgy, offshore platforms, papermaking, civil household appliances, automobiles, ships, petroleum, aerospace industries, and become a green remanufacturing process that can replace traditional electroplating technology.
The cladding layer completed by high-speed laser engraver cladding technology has high metallurgical quality, low dilution rate, small deformation, and high surface finish, which can greatly reduce the subsequent machining costs of enterprises in the field of industrial remanufacturing. WISCO Huagong Laser has always been committed to providing customers with laser surface treatment and remanufacturing application solutions. At present, it has successfully developed high-speed laser cladding technology and equipment, supporting ordinary cladding, broadband cladding, inner hole cladding and other technologies. Leading industries such as coal mining machinery, metallurgy, automotive, aerospace, etc. seek in-depth cooperation to conduct a comprehensive demonstration of industrial technologies in the entire processing chain such as powder materials, cladding efficiency, front-end and back-end processes, and provide workpiece processing, process development, and equipment according to corporate needs Customized and other complete technical services.