Cold forging technology is an efficient and energy-saving forging manufacturing method, which is widely used in various fields. However, the surface quality of cold forging forgings has an important impact on their overall performance and appearance. Therefore, surface treatment technology has become an indispensable part of the cold forging forging manufacturing process. This article will introduce the surface treatment technology of cold forging in detail to help readers better understand and apply the technology.
During cold forging, the surface of the forgings may become contaminated with oil, oxides and other impurities. These contaminants not only affect the appearance of forgings, but may also reduce their performance. Therefore, cleaning and oil removal is the first step of surface treatment. Common cleaning methods include solvent cleaning, alkaline cleaning and acid cleaning. Select the right cleaning agent and process parameters to ensure complete removal of contaminants while avoiding damage to the forging surface.
Mechanical polishing is a method of smoothing the forging surface by mechanical force. Common mechanical polishing methods include grinding wheel polishing, abrasive belt polishing and grinding polishing. This method can quickly remove the surface roughness and uneven area, improve the appearance quality of the forging. However, it should be noted that excessive polishing can cause surface deformation or damage, so it is necessary to control the polishing parameters and time.
Chemical treatment is a method of changing the composition and structure of the forging surface by chemical reaction to improve its performance. Common chemical treatment methods include zinc plating, chromium plating, shot blasting and so on. These methods can form a protective layer on the surface of the forging, improving corrosion resistance, wear resistance and aesthetics. However, the chemical treatment process needs to strictly control the composition of the treatment liquid, temperature and treatment time to ensure the treatment effect and forging quality.
Coating treatment is the method of coating a special material on the surface of the forging to improve its performance and appearance. Commonly used coating treatment methods include spraying, electrophoretic coating, vacuum coating and so on. These coatings can provide additional protection, lubrication, decoration and other functions to improve the corrosion resistance, wear resistance and beauty of the forgings. When selecting coating materials and processes, factors such as the material, use environment and requirements of the forgings need to be considered.
Heat treatment is a method of changing the structure and properties of the forging surface through a heating and cooling process. Common heat treatment methods include quenching, tempering, normalizing and so on. These methods can eliminate internal stress, improve mechanical properties and corrosion resistance. However, parameters such as heating temperature, holding time and cooling rate need to be precisely controlled during heat treatment to avoid damage to forgings such as deformation or cracking.
In the process of surface treatment, quality inspection and control is the key link to ensure the quality of forging. Common detection methods include visual inspection, roughness measurement, thickness measurement, etc. Through the establishment of a sound quality management system and traceability mechanism, the quality of each batch of products can be tracked and traced to ensure that product quality meets the design requirements. At the same time, non-destructive testing technology can also be used for online testing of forgings to find and deal with potential quality problems in time.
Surface treatment technology of cold forging forging is an important link to improve product quality and performance. Through cleaning and degreasing, mechanical polishing, chemical treatment, coating treatment, heat treatment and quality inspection and control, the appearance quality, corrosion resistance and mechanical properties of the forgings can be improved. In practical applications, the appropriate surface treatment technology and process parameters need to be selected according to the specific material, use environment and requirements to ensure the best quality and performance of cold forging forgings.
