Thermal power forging material performance improvement technology refers to a series of technical means to improve the mechanical properties of thermal power forging materials, corrosion resistance, oxidation resistance, etc., in order to meet higher requirements. With the continuous development of the thermal power generation industry, the requirements for the performance of thermal power forging materials are also increasing. Therefore, the technology of improving the performance of thermal power forging materials is of great significance for improving the operating efficiency and safety of thermal power generation equipment.
Choosing the right material is the first step to improve the performance of thermal power forging materials. When selecting materials, it is necessary to consider the chemical composition, physical properties and processing technology of materials.
Chemical composition: The chemical composition of the material directly affects the mechanical properties and corrosion resistance of the material. Therefore, when selecting materials, it is necessary to choose the appropriate chemical composition according to the requirements of use. For example, in the high-temperature environment of thermal power generation equipment, materials with excellent oxidation resistance need to be selected.
Physical properties: The physical properties of the material include density, thermal expansion coefficient, thermal conductivity, etc., which have an important impact on the processing and use of the material. When selecting materials, it is necessary to consider whether the physical properties of the material meet the requirements of use.
Processing technology: The processing technology of the material will also affect the performance of the material. When selecting materials, factors such as the machinability and processing cost of materials need to be considered. For example, although some high-strength alloy steels have excellent mechanical properties, their processing costs are high, so they need to be considered comprehensively when selecting.
Heat treatment is one of the key steps to improve the performance of thermal power forging materials. Through the heat treatment process, the internal structure and mechanical properties of the material can be changed to achieve the purpose of improving the performance of the material. Commonly used heat treatment processes include quenching, tempering, aging and so on.
Quenching: Quenching is a heat treatment process in which the material is heated to the austenitic state and quickly cooled to obtain martensitic structure. Quenching can improve the hardness and wear resistance of the material, but it also reduces the toughness of the material.
Tempering: Tempering is the heat treatment process of heating the quenched material to a certain temperature, holding it for a period of time and then slowly cooling it. Tempering can eliminate quenching stress and improve the toughness and fatigue strength of materials.
Aging: Aging is the heat treatment process of heating the material to a certain temperature, holding it for a period of time and then air cooling. Aging can improve the hardness and strength of the material, but it will also reduce the toughness of the material.
When selecting the heat treatment process, it is necessary to comprehensively consider the chemical composition and physical properties of the material. For example, for some high-strength alloy steels, the heat treatment process of quenching + tempering can be used to improve their mechanical properties and wear resistance.
Surface treatment is also one of the important means to improve the performance of thermal power forging materials. Through surface treatment, the surface structure and chemical properties of the material can be changed to improve the corrosion resistance and oxidation resistance of the material. Common surface treatment methods include spraying, galvanizing, carburizing and so on.
Spraying: Spraying is the treatment method of spraying paint with excellent corrosion resistance and oxidation resistance on the surface of the material. Spraying can improve the corrosion resistance and oxidation resistance of the material, and also improve the wear resistance of the material.
Galvanizing: Galvanizing is the treatment method of coating a zinc layer on the surface of a material. Galvanizing can improve the corrosion resistance and wear resistance of the material, and also improve the electrical conductivity of the material.
Carburizing: Carburizing is the process of penetrating carbon into the surface layer of a material. Carburizing can improve the surface hardness and wear resistance of the material, but also improve the oxidation resistance of the material.
When selecting the surface treatment method, it is necessary to consider comprehensively according to the use requirements and material properties. For example, for some thermal forgings that need to work in a high temperature environment, surface treatment methods such as spraying or carburizing can be used to improve their oxidation resistance and wear resistance.
The follow-up treatment is the last step in improving the performance of thermal power forging materials. Through follow-up treatment, the properties and stability of the material can be further improved. Common follow-up treatment methods include stress relief annealing and residual stress elimination.
Stress relief annealing: Stress relief annealing is a heat treatment process in which the material is heated to a certain temperature, held for a period of time and then slowly cooled. Stress relief annealing can eliminate the residual stress in the material and improve the stability and service life of the material.
Removal of residual stress: Removal of residual stress is the use of mechanical methods or heat treatment methods to remove residual stress in the material. The removal of residual stress can improve the stability and service life of the material, and also improve the mechanical properties and corrosion resistance of the material.
When selecting the subsequent treatment method, it is necessary to consider the use requirements and material properties. For example, for some thermal power forgings that need to work in a high temperature environment, follow-up treatment methods such as stress relief annealing can be used to improve their stability and service life.
Thermal power forging material performance enhancement technology is one of the important means to improve the operation efficiency and safety of thermal power generation equipment. The mechanical properties, corrosion resistance and oxidation resistance of thermal power forgings can be effectively improved by selecting suitable materials, formulating reasonable heat treatment process and surface treatment method and carrying out necessary follow-up treatment. In the future, with the continuous development of the thermal power generation industry, the requirements for the performance of thermal power forging materials will continue to increase. Therefore, thermal power forgings material performance improvement technology will continue to play an important role in creating greater economic and social benefits for enterprises.
