High temperature forging is an important metal processing method, which has many advantages, such as improving the strength and plasticity of materials, improving the microstructure properties and improving the heat resistance of materials. In terms of process, high temperature forging needs to master some important points, such as reasonable control of forging temperature, ensure forging speed and strength, and properly adjust the number of hammer strokes. In addition, the selection of materials is also crucial, and it is necessary to select alloy materials with good heat resistance, high temperature deformation resistance and corrosion resistance. These advantages and technical requirements provide a solid foundation for the development and production of high temperature forging parts.
The advantages of high temperature forging parts are obvious. First, high temperature forging can significantly improve the strength and plasticity of the material. Under normal circumstances, the forging temperature will be slightly higher than the grain boundary melting point of the raw material, which can effectively promote the recrystallization and discontinuous merging of the material, thereby increasing the compressive plasticity, tensile plasticity and fatigue limits of the material. Secondly, high temperature forging can also improve the organizational properties. After the material is forged at high temperature, the grain size is obviously reduced, the grain boundary becomes clear and dense, and it is conducive to the improvement of solid solubility and phase homogenization, thus significantly optimizing the material structure and properties. It is worth mentioning that high temperature forging can also improve the heat resistance of the material. Because after forging at high temperature, the oxide film of the material is destroyed, and the surface of the material is greatly repaired, thereby increasing its heat resistance and corrosion resistance.
However, to achieve these advantages, high temperature forging also needs to master some important technical requirements. Firstly, it is very important to control the forging temperature reasonably. Because the forging temperature is too high or too low, it will have an adverse effect on the performance of the material. Under normal circumstances, the forging temperature should be controlled between 0.6 and 0.8 times the melting point of the material and below. Secondly, ensuring the forging speed and strength is an important link to ensure high quality high temperature forging. This requires the equipment to be able to have higher energy storage and higher catalytic rates, and to be equipped with suitable forging presses and forging dies. In addition, it is necessary to properly adjust the number of hammer strokes. In general, in high temperature forging, more punching times can make the material more fully compressed, but excessive punching times will also lead to the deterioration of the mechanical properties of the material, so experimental adjustment and scientific control should be carried out according to the specific situation.
Finally, in order to ensure that high temperature forging obtains good results, it is also necessary to be extremely careful in the selection of materials. For this reason, alloy materials that can withstand high temperature and high pressure should be selected, such as high temperature alloy steel, high temperature alloy aluminum, high temperature alloy steel and their combinations. At the same time, among these materials, varieties with good heat resistance, high temperature deformation resistance and corrosion resistance should also be selected to ensure that the advantages of high temperature forging can be fully reflected.
