Laser Cladding Repair Processing Technology for Inner and Outer Walls of Steel Cylinders

Steel cylinders are widely used in industrial production, and the integrity of their inner and outer walls directly affects the normal operation of equipment. Laser cladding repair technology, as an advanced surface restoration method, demonstrates excellent performance in repairing the inner and outer walls of steel cylinders. Next, we will delve into this technology from multiple dimensions.

Detailed Steps of the Technical Process

The process of laser cladding repair for the inner and outer walls of steel cylinders is not just a few simple steps; each stage requires meticulous operational requirements. During the preprocessing stage, in addition to routine cleaning, a comprehensive inspection of the damage to the steel cylinder is necessary. Techniques such as ultrasonic flaw detection and penetration testing are used to determine the depth, scope, and type of damage, providing accurate data for formulating subsequent repair plans. For areas with cracks, crack-arresting treatment is required to prevent further expansion of the cracks during the repair process.

The preparation of cladding materials is also extremely critical. Based on the working environment and performance requirements of the steel cylinder, suitable alloy powders or ceramic powders must be selected. The powders undergo processes such as drying and sieving to remove moisture and impurities, ensuring fluidity and purity. The calibration of the powder feeding device is equally important, as it ensures that the powder is delivered uniformly and stably to the laser action area, avoiding inconsistencies in cladding layer thickness due to uneven powder feeding.

During the cladding process, the planning of the laser head's movement trajectory is a crucial factor in ensuring repair quality. For inner wall repairs, the rotational and axial movement speeds of the laser head must be reasonably planned based on the inner diameter and length of the steel cylinder to ensure uniform distribution of the cladding layer in both circumferential and axial directions. For outer wall repairs, in addition to considering the laser head's movement trajectory, attention must also be paid to avoiding the impact of the laser beam on the surrounding environment.

Basis for Selecting Cladding Materials

The materials selected for laser cladding repair of the inner and outer walls of steel cylinders must be comprehensively considered based on multiple factors. If the steel cylinder is used to transport fluids containing corrosive media, such as acid-base solutions or seawater, materials with excellent corrosion resistance, such as nickel-based alloy powders, should be chosen. Elements like chromium and molybdenum in nickel-based alloys can form a dense oxide film on the material surface, effectively preventing the intrusion of corrosive media.

For steel cylinders subjected to significant wear, such as those used to transport granular materials like ores or coal powder, materials with high hardness and wear resistance, such as tungsten carbide-based composite powders, should be selected. Tungsten carbide has extremely high hardness and wear resistance. Combining it with a metal matrix allows the cladding layer to exhibit both excellent wear resistance and toughness.

When steel cylinders operate in high-temperature environments, such as in boilers or steam turbines, materials with high-temperature resistance, such as cobalt-based alloy powders, must be chosen. Cobalt-based alloys possess high strength and oxidation resistance at high temperatures, ensuring the stable operation of steel cylinders under high-temperature conditions.

Summary

Currently, laser cladding repair technology for the inner and outer walls of steel cylinders has been widely applied in various fields. In the petrochemical industry, it is used to repair steel cylinders transporting media such as crude oil and natural gas, improving their corrosion resistance and service life. In the power industry, it is used to repair steel cylindrical components in steam turbines and generators, enhancing their wear resistance and high-temperature resistance. In the machinery manufacturing sector, it is used to repair various hydraulic cylinders, pneumatic cylinders, and other steel cylinders, restoring their precision and performance.

With the continuous development of industrial technology, the requirements for laser cladding repair technology for the inner and outer walls of steel cylinders are also increasing. In the future, this technology will continue to make breakthroughs in improving repair efficiency, optimizing cladding layer performance, and achieving intelligent repairs, providing more reliable and efficient steel cylinder repair solutions for industrial production.