In the field of metal processing, warm forging is an important forming process, which is widely used in the manufacture of various mechanical parts and structural parts. However, there are often non-metallic inclusions in the warm forging, which will have a bad effect on the performance of the forging. This paper discusses the influence of non-metallic inclusions on the performance of warm forging and the preventive measures.
Non-metallic inclusion refers to some non-metallic substances mixed in the metal, such as oxides, sulfides, silicates and so on. These inclusions may be introduced due to impure raw materials, improper operation during smelting, or environmental factors. In the process of warm forging, the existence of non-metallic inclusions will have adverse effects on the plasticity, strength and toughness of metal materials, thus affecting the quality and performance of forging.
Influence of non-metallic inclusions on the performance of warm forging
Reduce plasticity: The presence of non-metallic inclusions will destroy the continuity of metal materials, so that the metal is prone to cracks and fractures during plastic deformation. This will reduce the plasticity of the metal, making the forging prone to problems such as cracking and deformation during the forming process.
Reduced strength: The presence of non-metallic inclusions can lead to a reduction in the strength of metal materials. This is because inclusions weaken the crystal structure of the metal, making the metal prone to deformation and fracture when stressed. This will affect the bearing capacity and service life of the forgings.
Reduce toughness: The presence of non-metallic inclusions will reduce the toughness of the metal, making the metal prone to fracture during impact or vibration. This will affect the impact resistance and fatigue resistance of the forging, so that the forging is prone to fracture, damage and other problems during use.
Affect the surface quality: The presence of non-metallic inclusions will have an adverse effect on the surface quality of the forging. This is because the inclusion will form uneven and rough unequal defects on the metal surface, affecting the appearance and performance of the forging.
Measures to prevent non-metallic inclusions
Control the quality of raw materials: Selecting high-quality raw materials is the key to preventing non-metallic inclusions. Raw materials should be strictly inspected and analyzed to ensure that their composition is pure and free of impurities. At the same time, raw materials should also be pre-treated, such as removing pollutants such as oxides and sulfides, in order to reduce the content of inclusions.
Optimization of melting process: Improper operation during melting can also lead to the introduction of non-metallic inclusions. Therefore, the melting process should be optimized, such as controlling the melting temperature, melting time, stirring speed and other parameters to ensure that the metal liquid is fully mixed and uniform, and reduce the generation of inclusions.
Strengthen equipment maintenance: Poor equipment condition may also lead to the introduction of non-metallic inclusions. Therefore, the equipment should be checked and maintained regularly to ensure that the equipment is in good working condition. At the same time, residues and pollutants in the equipment should also be cleaned regularly to reduce the content of inclusions.
The use of filtration technology: The use of filtration technology can effectively remove non-metallic inclusions in liquid metal. For example, equipment such as filters and filters can be used to filter liquid metals to remove pollutants such as oxides and sulfides. This will help to improve the purity of the metal liquid and reduce the introduction of inclusions.
Strengthening quality detection: Strengthening quality detection is one of the important measures to prevent non-metallic inclusions. Quality inspection and analysis of forgings should be carried out regularly to ensure that their quality meets the requirements. At the same time, a quality traceability system should be established to trace and deal with quality problems to prevent similar problems from happening again.
In summary, the influence of non-metallic inclusions on the performance of warm forging forging can not be ignored. In order to ensure that the quality and performance of forgings meet the requirements, effective preventive measures should be taken to reduce the content of non-metallic inclusions. By controlling raw material quality, optimizing smelting process, strengthening equipment maintenance, adopting filtration technology and strengthening quality inspection, the introduction of non-metallic inclusions can be effectively prevented and the quality and performance stability of warm forging parts can be improved.
