A brief discussion on the manufacturers of hydraulic rod laser cladding. What are the process characteristics of laser cladding?

Laser cladding of hydraulic rods is a complex physicochemical metallurgical process. The equipment, materials, and parameters in the laser cladding process have a significant impact on the quality of the cladded parts. Laser cladding of hydraulic rods The manufacturer indicates that before laser melting, the material surface needs to be pre-treated to remove oil, water, dust, rust, and scale from the material surface to prevent them from entering the cladding layer and forming inclusions and defects, affecting quality and performance. If the dirt on the workpiece surface is firmly attached, mechanical sandblasting can be used for cleaning. Sandblasting also helps to improve the surface roughness and laser absorption rate of the substrate. Oil stains can be cleaned by heating the cleaning agent to a certain temperature. Before use, the powder should also be baked at a certain temperature to remove the adsorbed water on its surface and improve its fluidity.

　　According to Laser cladding of hydraulic rods the manufacturer, laser cladding has various forms, such as single pass, multi-pass overlapping, single layer, and multi-layer stacking. The form used depends on the specific size requirements of the coating. Multi-pass overlapping and multi-layer stacking can prepare large-area and thick cladding layers.

　　The formation of the laser cladding layer is closely related to the process. Selecting reasonable process parameters can ensure good metallurgical bonding between the cladding layer and the substrate, while the cladding layer is smooth, dense, and defect-free. During the process, argon gas protects the molten pool to prevent oxidation. At a certain scanning speed, as the powder feeding speed increases, the cladding layer thickness increases, but the width does not change much. At a certain feed rate, as the scanning speed increases, the thickness and width decrease.

　　The main characteristics of laser cladding of hydraulic rods are high precision and low heat effect. Therefore, the impact on the geometric characteristics of nearby parts is minimal or nonexistent. Compared with other welding technologies, the amount of secondary finishing work is less. The target properties of the coating can usually be achieved with only one layer, while higher dilution of other processes requires two or more layers. Hot laser cladding introduces preheated wire in this process. Therefore, more laser energy can be used to melt the substrate at an increased feed rate. High-speed laser cladding (EHLA) completely melts the additive powder in the laser beam before the laser beam reaches the substrate, and "large spot" laser cladding is a process that increases the size of the laser spot on the workpiece to allow the use of more laser power without excessively melting the substrate and increasing dilution.

        Laser cladding of hydraulic rods The manufacturer points out that laser cladding technology is a high-tech surface modification technology and equipment maintenance technology. It integrates material preparation and surface configuration and is one of the key supporting technologies of green remanufacturing technology. It is a high-tech industry that conforms to the national sustainable development strategy, and its research and development have key practical significance and economic value.