With the continuous development of industry, the pinch roller is one of the important production equipment, and its performance and life have an important impact on production efficiency and quality. However, due to long-term use or improper operation, the pressure wheel is prone to wear, corrosion and other problems, which need to be repaired. Traditional repair methods such as surfacing welding and spraying have some limitations and shortcomings, and laser cladding repair technology has become a new and effective repair method.
1. Laser cladding repair technology
Laser cladding repair technology is to use high-energy laser beam to quickly melt alloy powder or ceramic powder and substrate surface to form a coating with good performance to achieve the purpose of repair technology. This technology has the advantages of simple operation, high repair quality and low cost, so it has been widely used in the field of pinch roll repair in steel mills.
2. Laser cladding repair process
(1). Before laser cladding repair, it is necessary to pretreat the surface of the pinch roll. First of all, clean the surface, remove oil, rust and other impurities; Then coarsening is carried out to form a certain number of micro-pits on the surface to improve the adhesion of the cladding layer.
(2). Alloy powder or ceramic powder preparation according to the repair requirements to choose the appropriate alloy powder or ceramic powder. A suitable cladding material can be prepared by mixing the powder with an appropriate amount of binder.
(3). The laser cladding operation uniformly coats the prepared cladding material on the surface of the pinch roll, and then uses a high-energy laser beam to quickly melt the coating. Under the action of laser, the coating and the substrate surface are fused quickly to form a cladding layer with excellent performance.
(4). Post-treatment After laser cladding is completed, the cladding layer needs to be post-treated. First, the cladding layer is cooled. Then polishing, trimming and other treatment, remove surface burrs, flash and other defects. Finally, progressive tests and assessments are required.
3. The application effect of laser cladding repair technology
After repairing the pinch roll by laser cladding repair technology, its service life and performance can be significantly improved. Specifically, the laser cladding layer has excellent properties such as high hardness, high wear resistance and high corrosion resistance, which can effectively protect the substrate surface from wear and corrosion. At the same time, the laser cladding repair technology is easy to operate and low cost, which can quickly complete the repair work and reduce the production downtime. In addition, the laser cladding layer and the matrix surface bonding force is strong, not easy to fall off, crack, which has good reliability and stability.
Laser cladding repair technology, as a new type of pinch roll repair method, has the advantages of simple operation, high repair quality and low cost. After the pinch roller is repaired by this technology, its service life and performance can be significantly improved, production downtime can be reduced, and maintenance costs can be reduced. Therefore, laser cladding repair technology has broad application prospects in the field of pinch roll repair in steel mills.
Xi'an Guosheng Laser Technology Co., Ltd. is a high-tech enterprise specializing in R&D, manufacturing and sales of automatic laser cladding machine, high-speed laser cladding machine, laser quenching machine, laser welding machine and laser 3D printing equipment. Our products are cost-effective and sold domestically and abroad. If you're interested in our products, please contact us at bob@gshenglaser.com.