Thermal power forging is an important component in the thermal power generation industry, and its surface quality directly affects the operating efficiency and safety of equipment. In order to improve the surface quality and performance of thermal power forgings, surface treatment technology has become an important means. This paper will analyze and discuss the surface treatment technology and application of thermal power forging.
Surface treatment technology refers to changing the organizational structure, chemical composition and shape of the material surface through a certain process method to improve the performance and quality of the material surface. In the manufacture of thermal power forgings, the commonly used surface treatment technologies mainly include the following:
Spray treatment
Spraying treatment means that the coating is evenly smeared on the surface of the material by spraying to form a coating with a certain thickness and performance. The spraying treatment has the advantages of simple operation, good coating uniformity and strong adaptability, which can meet different requirements. In the manufacture of thermal power forgings, spraying treatment is mainly used to improve the corrosion resistance and wear resistance of forgings.
Heat treatment
Heat treatment refers to changing the internal structure and properties of materials by means of heating and cooling. In the manufacture of thermal power forgings, heat treatment is mainly used to improve the mechanical properties and wear resistance of forgings. For example, the hardness and wear resistance of forgings can be improved by quenching treatment, and the internal stress generated by quenching can be eliminated by tempering treatment, and the toughness and fatigue strength of forgings can be improved.
Chemical treatment
Chemical treatment refers to the means of chemical reaction to change the structure and chemical composition of the surface of the material. In the manufacture of thermal power forgings, chemical treatment is mainly used to improve the corrosion resistance and oxidation resistance of forgings. For example, a dense oxide film can be formed on the surface of the forgings through bluing treatment, improving the corrosion resistance and oxidation resistance of the forgings.
In the manufacture of thermal power forgings, the process of surface treatment mainly includes the following steps:
Surface pretreatment: The surface of the forging is cleaned, polished, rust removal and other treatment to remove surface impurities and defects, improve the surface roughness and adhesion.
Spraying treatment: The coating is evenly spread on the surface of the forging by spraying to form a layer of coating with a certain thickness and performance. The type of coating and spraying process need to be selected and optimized according to the specific requirements of use.
Heat treatment: the forging is heated to a certain temperature, held for a certain time, and then cooled. The process parameters of heat treatment need to be selected and optimized according to the specific material and use requirements.
Chemical treatment: the forging is put into a certain chemical solution, and a film layer with specific properties is formed on the surface through a chemical reaction. The type of chemical treatment solution and treatment time need to be selected and optimized according to the specific use requirements.
Post-treatment: cleaning, drying, inspection and other treatment of the surface treated forgings to ensure the treatment effect and quality.
In the manufacture of thermal power forgings, the main methods for assessing the quality of surface treatment include:
Appearance inspection: Observe the appearance quality of the coating or film layer on the surface of the forging, and check whether there are defects such as foaming, cracking, falling off.
Conductivity test: Electrical conductivity test is performed on the forgings after spray treatment to evaluate the electrical conductivity of the coating.
Corrosion resistance testing: The surface treated forgings are placed in a corrosive medium for corrosion resistance testing to assess the corrosion resistance of the coating or film.
Hardness testing: Hardness testing of forgings after heat treatment to evaluate the effect and quality of heat treatment.
Other performance tests: According to the specific requirements of use, other performance tests can also be carried out, such as wear resistance test, oxidation resistance test, etc.
In a thermal power plant, spraying treatment technology is used to treat the surface of thermal power forgings. The corrosion resistance and wear resistance of forgings are improved effectively by selecting suitable coating and spraying process. In practical application, thermal power forgings treated by spraying have shown good performance and service life, and have been widely used and popularized.
Surface treatment technology is an important means to improve the surface quality and performance of thermal power forging. In the manufacture of thermal power forgings, commonly used surface treatment technologies include spray treatment, heat treatment and chemical treatment. Through the strict control and quality evaluation of the surface treatment process, the treatment effect and quality can be effectively guaranteed. In practical application, thermal power forgings with surface treatment show good performance and service life, which is of great significance to improve the operating efficiency and safety of thermal power generation equipment. In the future, with the continuous development of science and technology and the adjustment of energy structure, the surface treatment technology of thermal power forging manufacturing will continue to improve and improve.
