Thermal power forging is an important component in thermal power generation equipment, its quality and performance directly affect the efficiency and safety of thermal power generation equipment. Heat treatment technology plays an important role in the manufacture of thermal power forgings. This paper will analyze and discuss the heat treatment technology in the manufacture of thermal power forgings.
The manufacturing of thermal power forgings mainly includes raw material procurement, forging, heat treatment, machining, inspection and packaging. Among them, heat treatment technology refers to a technology that changes the performance of the material by changing its organizational structure under certain conditions. In the manufacture of thermal power forgings, the main purpose of heat treatment technology is to improve the mechanical properties, corrosion resistance and oxidation resistance of materials.
Heat treatment technology in manufacturing thermal power forgings
Heat treatment technology is mainly divided into the following types: annealing, normalizing, quenching, tempering, surface heat treatment and so on. In the manufacture of thermal power forgings, the common heat treatment techniques are quenching and tempering.
Quenching is a heat treatment process in which steel heated to austenitic state is rapidly cooled to obtain martensitic structure. In the manufacture of thermal power forgings, the main purpose of quenching is to improve the hardness and wear resistance of the material. The commonly used quenching methods are water quenching, oil quenching and gas quenching. Among them, water quenching cooling speed is the fastest, but it is easy to cause workpiece deformation and cracking; The oil quenching cooling speed is slow, and the risk of workpiece deformation and cracking is small; The gas quenching cooling speed is fast, and the workpiece surface quality is good, but the cost is high.
Tempering is a heat treatment process in which the workpiece after quenching is heated to a certain temperature and cooled after holding for a certain time. In the manufacture of thermal power forgings, the main purpose of tempering is to eliminate quenching stress and improve the toughness and plasticity of materials. The commonly used tempering methods are low temperature tempering, medium temperature tempering and high temperature tempering. Among them, low temperature tempering is mainly used to improve the hardness and wear resistance of materials; Medium temperature tempering is mainly used to improve the toughness and plasticity of materials; High temperature tempering is mainly used to eliminate quenching stress and improve the structure and properties of materials.
Application of heat treatment technology in manufacturing thermal power forgings
In the manufacture of thermal power forgings, the application of heat treatment technology is mainly reflected in the following aspects:
Improve the mechanical properties of materials. Through heat treatment processes such as quenching and tempering, the organizational structure of the material can be changed to improve its mechanical properties, such as hardness, strength, toughness and so on.
Improve corrosion resistance and oxidation resistance of the material. Through surface heat treatment and other processes, a hardened layer with excellent corrosion resistance and oxidation resistance can be formed on the surface of the workpiece, thereby improving the corrosion resistance and oxidation resistance of the material.
Improve the processing properties of materials. The hardness of the material can be reduced and its machining performance can be improved by annealing and other processes. Through normalizing and other processes, the grain of the material can be refined, its toughness can be improved, and the deformation and cracking problems in the process of processing can be reduced.
Heat treatment technology plays a vital role in the manufacture of thermal power forgings. Through the reasonable application of heat treatment technology, the mechanical properties, corrosion resistance and oxidation resistance of materials can be improved, and the processing properties of materials can be improved, so as to improve the quality and performance of thermal power forgings. Therefore, in the thermal power forging manufacturing process, we should pay full attention to the application and research of heat treatment technology, and constantly optimize and improve the heat treatment process to provide protection for the normal operation and safety of thermal power generation equipment.
