In the production process of precision forgings, surface treatment and coating technology are the most important links. These technologies can not only improve the appearance quality of forgings, but also increase their corrosion resistance, wear resistance and other functional characteristics. This paper will focus on the application and importance of surface treatment and coating technology of precision forgings.
First, surface treatment
Cleaning and deburring
During the forging process, the surface of the forging may be left with grease, oxide, burr, etc. Therefore, it is first necessary to thoroughly clean the forgings to remove surface impurities. Deburring can be done by mechanical, chemical or electrochemical methods to ensure that the forging surface is flat.
Surface roughness treatment
Depending on the purpose of the forging, it may be necessary to treat its surface roughness. By grinding, polishing and other methods, the surface roughness of forging can be improved, its appearance quality and friction performance can be improved.
Surface strengthening treatment
In order to enhance the wear resistance and corrosion resistance of forgings, surface strengthening treatment technology can be used, such as shot peening, carburizing quenching, nitriding and so on. These treatments can change the structure of the forging surface, thereby improving its surface hardness and durability.
Second, coating technology
electroplate
Electroplating is a method by which a layer of metal or alloy is deposited on the surface of a forging to improve its corrosion resistance and aesthetics. Common electrocoatings include zinc, chromium, nickel and so on. The forgings after electroplating have good oxidation resistance and corrosion resistance, and are widely used in automotive, aerospace and other fields.
spray
Spraying is to spray the paint evenly on the surface of the forging through the spray gun to form a protective film. This coating technology can give forging different colors and appearance effects, and increase its weather resistance, wear resistance and so on. The choice of spray coating should be reasonably matched according to the use environment and requirements of the forging.
Chemical conversion membrane treatment
Chemical conversion film treatment is the use of chemical reaction on the forging surface to produce a layer of dense oxide film, phosphating film, etc. This treatment method can improve the corrosion resistance and coating adhesion of the forging, and provide a good foundation for the subsequent coating process.
With the continuous progress of science and technology, the surface treatment and coating technology of precision forgings will continue to develop. In the future, we can expect innovation in the following directions:
Environmentally friendly treatment technology: traditional treatment methods may bring environmental pollution, the future will pay more attention to the development and application of environmentally friendly surface treatment and coating technology.
Composite coating technology: Combining the advantages of multiple coating technologies, the development of composite coatings with comprehensive properties to meet the needs of more complex applications.
Intelligent processing technology: The introduction of artificial intelligence, big data and other technologies to achieve intelligent monitoring and optimization of surface treatment and coating processes.
In summary, the surface treatment and coating technology of precision forgings plays an important role in improving product quality and increasing functional characteristics. Through continuous innovation and technological upgrading, we believe that these technologies will bring broader prospects for the development of the precision forging industry.
