Locomotive track seat forging plays an important role in railway transportation system, but because of its long-term exposure to various complex environments, it is easy to be corroded. Corrosion will not only affect the service life of track block forging, but also pose a threat to the safety of the entire railway transportation system. Therefore, improving corrosion resistance is an important development direction of locomotive track seat forging. This paper will discuss the surface treatment and protection technology application of anti-corrosion locomotive track block forging.
Surface treatment technology
Coating protection: By coating anti-corrosion coating on the surface of the track seat forging, such as paint, plating, etc., it can effectively isolate the material from the corrosion environment and reduce the corrosion rate. Commonly used coating materials include organic coating, inorganic coating and composite coating.
Electroplating: Electroplating is a method of increasing corrosion resistance by depositing a metal or alloy coating on a metal surface. Common electroplating processes include zinc plating, chromium plating, nickel plating and so on. The electroplating process has the advantages of simple operation and low cost, and is widely used in the anti-corrosion treatment of rail block forgings.
Thermal spraying: Thermal spraying is a surface treatment technology that forms a corrosion resistant coating by spraying the molten spray material to the surface of the substrate at high speed. The thermal spraying process has the advantages of large coating thickness, good corrosion resistance, etc., and is suitable for the anti-corrosion treatment of large rail base forgings.
Chemical conversion film: A dense oxide film or chemical conversion film is formed on the surface of the metal by chemical methods to improve the corrosion resistance of the metal. The commonly used chemical conversion films include oxidation film, phosphating film and passivation film.
Application of protection technology
Selection of corrosion-resistant materials: In the manufacturing process of rail seat forgings, priority is given to materials with good corrosion resistance, such as stainless steel, alloy steel, etc. These materials themselves have good corrosion resistance, which can fundamentally improve the corrosion resistance of rail seat forgings.
Structural design optimization: Reasonable structural design can reduce the retention and accumulation of corrosive media inside the track block forging, thereby reducing the corrosion rate. For example, measures such as optimizing drainage design and reducing dead corners and gaps can improve the corrosion resistance of rail seat forgings.
Environmental control: Control the use environment of locomotive track seat forgings to avoid contact with corrosive media and harmful gases. For example, in strongly corrosive environments, seal protection measures can be used to prevent corrosive media from invading the interior of the rail seat forging.
Regular maintenance: Regular maintenance of the track block forgings, such as cleaning, oiling and other measures, can effectively delay the corrosion process. At the same time, the damaged coating and protective structure are repaired in time to ensure the continuity of its corrosion resistance.
Quality monitoring and testing: Establish a sound quality monitoring and testing system to comprehensively monitor the production and use process of rail block forgings. Through regular inspection and evaluation, corrosion problems are found and dealt with in time to ensure the safety and durability of rail seat forgings.
Taking a railway transportation system as an example, in order to improve the corrosion resistance of locomotive track block forging, the following measures are taken: First, the surface treatment of track block forging is carried out, and a layer of corrosion resistance coating is formed on the surface by thermal spraying process; Secondly, the stainless steel material with good corrosion resistance is selected to manufacture the track seat forging; At the same time, the structural design is optimized to reduce the retention and accumulation of corrosive media. In addition, strengthen environmental control to avoid contact with harmful gases and corrosive media; Regular maintenance and quality inspection of the track base forgings are also carried out. The implementation of these measures significantly improves the corrosion resistance of the locomotive track seat forging, prolonges its service life and ensures the safety and stability of the system.
Corrosion resistance is one of the important performance indexes of locomotive track base forging. Through the application of surface treatment technology and protection technology, the corrosion resistance of track block forging can be effectively improved to extend its service life. The comprehensive application of corrosion resistant materials, optimization of structural design, environmental control, regular maintenance and quality monitoring and testing can comprehensively improve the corrosion resistance of locomotive track block forgings and provide guarantee for the safe and stable operation of railway transportation system.
