What surface treatment methods are there for Railway And Train Parts?

In the manufacturing and maintenance of Railway And Train Parts, surface treatment methods play a vital role. These treatment methods enhance the corrosion resistance and wear resistance of the parts, and also improve their overall performance and service life. The following are some common surface treatment methods for railway and train parts.

1. Sandblasting and shot blasting
Sandblasting and shot blasting are commonly used surface cleaning and pretreatment technologies in the railway industry. They spray abrasives (such as steel shots, corundum, etc.) to the surface of the parts at high speed to remove rust, old coatings, oil stains and other impurities, so that the surface reaches a certain degree of cleanliness and roughness. This treatment method not only improves the adhesion of the coating, but also lays the foundation for subsequent surface treatment (such as painting, electroplating, etc.). Sandblasting and shot blasting are widely used in the cleaning and strengthening of parts such as tracks, bogies, and car bodies.

2. Zinc treatment
Zinc technology is an advanced metal surface thermal diffusion coating anti-corrosion process. It greatly improves the corrosion resistance of the parts by forming a dense zinc alloy film on the metal surface. In the railway field, sherardizing is widely used for anti-corrosion treatment of rails, fasteners and other components. The zinc alloy film can not only effectively prevent the occurrence of corrosion, but also improve the wear and impact resistance of the components, thereby extending the service life.

3. Passivation treatment
Passivation treatment is usually used as a supplement to sherardizing or other surface treatments to further enhance the corrosion resistance of components. By forming a protective oxide film on the surface of the components after sherardizing or other treatments, the passivation treatment effectively isolates moisture and oxygen in the external environment, thereby slowing down the corrosion process. This treatment method not only improves the corrosion resistance of the components, but also improves its appearance, making it smoother and more uniform.

4. Coating treatment
Coating is one of the most commonly used surface treatment methods for railway and train components. By applying one or more layers of protective coating on the surface of the components, the coating treatment isolates the metal substrate from the external environment, thereby preventing the occurrence of corrosion. The choice of coating process and the quality of the coating directly affect the anti-corrosion effect and service life of the components. During the coating process, the thickness, uniformity and adhesion of the coating need to be strictly controlled to ensure its protective performance.

5. Laser rust removal
Laser rust removal is an emerging rust removal method that uses high-energy pulsed lasers to irradiate the surface of components, causing the surface rust layer to absorb laser energy and rapidly heat up to produce gasification, thermal expansion and other phenomena, thereby achieving the peeling of the rust layer. Laser rust removal has the advantages of high precision and good effect, and is particularly suitable for small-area rust removal of precision components. However, for rust removal operations on large vehicle bodies and large components, the efficiency of laser rust removal is relatively low and it is difficult to meet production needs.

There are many ways to treat the surface of railway and train components, each of which has its unique advantages and scope of application. In practical applications, it is necessary to select a suitable treatment method based on the specific conditions of the components and production requirements to ensure the performance and service life of the components.