Petrochemical forgings play a key role in petrochemical production, often need to withstand high temperature, high pressure, corrosion and other harsh conditions, so its surface strength and corrosion resistance is particularly important. In order to improve the surface properties of forgings, extend their service life and ensure safe production, surface strengthening technology came into being. In this paper, the surface strengthening technology of petrochemical forgings and its application will be discussed in depth.
The working environment of petrochemical forgings is often very harsh, such as high pressure, high temperature, strong corrosion, etc. These conditions are easy to lead to surface damage and failure of forgings. The application of surface strengthening technology can enhance the hardness, wear resistance and corrosion resistance of the forging surface, so as to improve its service life and safety. Specifically, the main implications of surface strengthening technology include:
Improve hardness: Through surface strengthening treatment, the hardness of the forging surface can be significantly improved, enhancing its ability to resist deformation and damage.
Enhanced wear resistance: petrochemical forgings are often subjected to friction and wear during use. Surface strengthening technology can reduce this wear to a certain extent and improve the service life of forgings.
Improve corrosion resistance: there are a lot of corrosive media in the petrochemical environment, which puts forward higher requirements for the corrosion performance of forgings. The surface strengthening technology can improve the corrosion resistance of forgings and reduce corrosion damage.
Common surface strengthening techniques
Carburizing and quenching: By penetrating carbon into the forging surface and quenching treatment, the hardness and wear resistance of the surface can be significantly improved. This method is suitable for forgings that need to withstand heavy loads and shocks.
Nitriding treatment: The infiltration of nitrogen into the forging surface can form a hard and corrosion resistant nitriding layer. This method can improve the corrosion resistance and hardness of forgings, while maintaining good toughness.
Shot peening: By spraying small particles at high speed to impact the surface of the forging, the plastic deformation of the surface and the introduction of compressive stress, so as to improve the hardness and fatigue strength of the surface. This method is suitable for forgings subjected to cyclic loads.
Chemical coating: A layer of metal or non-metal coating is deposited on the surface of the forging by chemical methods to improve its corrosion resistance, electrical conductivity and lubricity. This method can select the appropriate coating material according to the specific needs.
Taking the valve used by a petrochemical company as an example, the company adopted nitriding treatment to strengthen the valve surface. After treatment, the corrosion resistance of the valve has been significantly improved, reducing leakage accidents caused by corrosion. At the same time, the hardness and wear resistance of the valve have also been enhanced, extending its service life. The application of this technology saves a lot of maintenance and replacement costs for enterprises and improves production efficiency.
The surface strengthening technology of petrochemical forgings is of great significance for improving the surface properties, prolonging the service life and ensuring the safety of production. In practical applications, the appropriate surface strengthening technology should be selected according to the specific needs of the forging and the working environment. With the continuous development of science and technology, we expect that more efficient and environmentally friendly surface strengthening technologies and methods will be developed to provide a strong guarantee for the sustainable development of the petrochemical industry.
