Free forging refers to the metal blank heating to a certain temperature, under the action of pressure and impact force, through the form of hammering or extrusion forming process. Compared with other forming methods, it has the following characteristics: Material uniformity: Free forging can eliminate the holes, inclusions and other defects inside the metal blank, making the organization of the material more dense and uniform. This uniformity can improve the strength, toughness and fatigue resistance of the product. Grain refinement: Through free forging, the grain of the metal can be refined, and the number and length of the grain interface can be increased, which can improve the strength and hardness of the material. Stress distribution: Free forging can change the original stress state of the material, eliminate or reduce the internal stress, so that the product is not easy to produce deformation, cracking and fracture during use. Directional properties: Free forgings produce a certain directivity to the deformation and flow of metal materials, making the material have better properties in certain directions, such as tensile strength, ductility, etc. Reduce the processing amount: compared with other forming methods, free forging does not need to use the mold, so it saves the time and cost of making the mold, and reduces the processing cost of the product. Dimensional accuracy: Free forgings can obtain high dimensional accuracy, and can be trimmed during the forming process, so there is no need to carry out a lot of mechanical processing, reducing the error introduced by processing. In summary, free forging has a positive impact on the quality and performance of the product, which can improve the uniformity, strength, toughness, fatigue resistance of the material, improve the grain structure and stress distribution of the material, reduce the processing amount while ensuring dimensional accuracy and other requirements.
