Application of Laser Cladding Technology in Steel Mill Roll Repair
In the steel industry, rolls serve as key equipment components, undertaking important functions such as rolling, conveying, and supporting. However, during operation, due to long-term exposure to harsh working conditions like high temperature, high pressure, and friction, the surfaces of rolls are prone to damages including wear, spalling, and cracks. These damages not only shorten the service life of rolls but also severely affect the quality of steel products and production efficiency. Therefore, timely and effective repair of rolls is particularly crucial. In recent years, as an advanced surface treatment technology, laser cladding has been widely applied in the repair of wear-resistant rolls in steel mills, achieving remarkable results.
Why Laser Cladding Outperforms Traditional Methods in Roll Repair
Laser cladding repair is a restoration method that uses a high-energy laser beam to rapidly melt cladding materials and form a metallurgical bond with the substrate surface. Compared with traditional repair methods such as overlay welding, electroplating, and thermal spraying, laser cladding offers higher repair precision, stronger metallurgical bonding strength, superior surface performance, and lower costs. Therefore, laser cladding technology boasts unique advantages and broad application prospects in the repair of wear-resistant rolls in steel mills.
Laser Cladding Repair Process: Surface Pretreatment and Its Requirements
The laser cladding repair process mainly includes the following steps: Firstly, surface pretreatment of the wear-resistant rolls is required to remove impurities such as oil stains, rust, and old coatings from the surface, ensuring a good bond between the cladding layer and the substrate. This step is crucial, as the presence of surface impurities will affect the quality and performance of the cladding layer. During pretreatment, methods such as sandblasting, grinding, and cleaning can be used to clean the roll surface.