The impact of forging process on the radiation resistance of Nuclear project forgings

1. Improvement of material properties by forging process
The forging process causes plastic deformation of metal materials through high temperature heating and mechanical pressure, thereby improving their microstructure. Compared with casting, forging can significantly improve the density of materials, eliminate defects such as pores and cracks inside the materials, and enhance the uniformity of materials.

In Nuclear project forgings, the microstructure of the material has a direct impact on its radiation resistance. In a high radiation environment, the neutrons and gamma rays released by the nuclear reactor will continuously act on the lattice structure of the metal, causing lattice deformation, dislocation movement and atomic defects, which in turn affect the strength and ductility of the material.

2. Enhancement of radiation resistance by high temperature forging
High temperature forging is a commonly used method in forging technology. It heats the metal to a certain temperature and then forges it to cause plastic deformation of the metal, thereby achieving the purpose of improving material properties. In nuclear power projects, many key equipment components need to withstand the dual test of high temperature, high pressure and radiation, and high temperature forging can significantly improve the performance of metals in these environments.

Forging at high temperature helps to form a more uniform and fine grain structure. This structure can reduce the generation of lattice defects under the action of radiation and improve the metal's ability to resist radiation hardening. Especially for alloy steel materials such as A182 F91 and F92, the high temperature forging process can optimize their high temperature performance, so that they can still maintain mechanical properties and radiation resistance in a long-term high temperature and radiation environment.

3. Optimization of material radiation resistance by precision forging process
Precision forging is a forging technology that achieves high-precision forming by precisely controlling process parameters such as temperature, pressure and deformation rate. This technology can significantly improve the surface quality and dimensional accuracy of the material and reduce the generation of defects.

In nuclear power projects, precision forging can optimize the grain structure of materials such as F91 and F92, so that the metal can distribute stress more evenly in a radiation environment and reduce material degradation caused by local stress concentration. At the same time, precision forging can also improve the density of the material, reduce the generation of cracks and pores, and enhance the radiation resistance of the material.

4. Specific application of forging process to radiation resistance of forgings
In nuclear power projects, the application of forging process is not limited to improving the basic mechanical properties of materials, but is also the key to improving the radiation resistance of forgings. For example, in key equipment such as nuclear reactor pressure vessels and steam generators, forgings need to withstand strong radiation from nuclear reactors. Through high temperature and precision forging processes, alloy steel materials such as A182 F91 and F92 can maintain good radiation resistance in long-term high radiation environments, ensuring the safety and reliability of equipment.

In addition, the radiation resistance of forgings is also reflected in the cooling system and piping system of nuclear power plants. These systems are exposed to high temperature and radiation environments for a long time. The radiation resistance of forging materials can effectively prevent material embrittlement or strength loss caused by radiation, ensuring the stable operation of the system.