中文简体
EnglishBasic principles of knurling design
Knurling, also known as embossing or rolling, is a process that creates a specific pattern or texture by applying pressure to a metal surface. During the bolt manufacturing process, a series of tiny and uniform uneven textures can be formed by rolling the bolt head or shaft with a special knurling wheel. These textures not only beautify the appearance of the bolt, but more importantly, they have a profound impact on the performance of the bolt.
Increased surface area and microstructural changes
First, the knurled design significantly increases the surface area of the bolt. Compared with the smooth bolt surface, the knurled surface has more unevenness. These tiny uneven structures provide a larger surface area, allowing the coating or anti-rust treatment material to better adhere to the bolt surface, enhancing the Improve the firmness and uniformity of the anti-corrosion layer. In addition, the increased surface area also means that more surface area is involved in chemical reactions, such as passivation processes, which helps to form a denser protective film and further improves corrosion resistance.
More importantly, the knurled design optimizes the physical and chemical properties of the surface by changing the microstructure of the bolt surface. These tiny concave-convex structures can break the continuous liquid film of corrosive media (such as water, oxygen, corrosive chemicals) on the surface of the bolt, reduce the direct contact area between the corrosive media and the bolt base material, thereby slowing down the corrosion rate. At the same time, these structures can also play a "drainage" role, effectively removing moisture and reducing the possibility of corrosion even in humid environments.
The actual effect of improving corrosion resistance
Knurled bolts provide excellent corrosion resistance in wet, dusty or corrosive environments. For example, in the fields of marine engineering, chemical installations, outdoor facilities, etc., bolts are often exposed to harsh conditions such as salt spray, moisture, acid and alkali, etc. Traditional smooth bolts are often difficult to resist corrosion for a long time, leading to problems such as loosening and breakage. Frequent. Bolts with knurled design effectively block the intrusion of corrosive media due to the protective layer formed on their surface, greatly extending the service life of the bolts, reducing maintenance costs and replacement frequency, and improving the reliability and safety of the overall system.
Application prospects and future prospects
As materials science and manufacturing processes continue to advance, knurling designs continue to evolve. For example, combined with advanced surface treatment technologies (such as electroplating, thermal spraying, chemical conversion coating, etc.), the corrosion resistance of knurled bolts can be further improved. At the same time, customized knurling patterns and texture designs for specific application scenarios can not only meet the aesthetic needs, but also optimize the anti-corrosion effect.
