中文简体
English1. Indirect mechanism of coating and treatment on friction performance
The friction coefficient is a physical quantity that measures the relative sliding difficulty of two contact surfaces. It directly affects the tightening effect and long-term stability of the nut. However, simple coating or surface treatment cannot directly change the basic friction coefficient of the material, but it can indirectly improve the friction performance by increasing the hardness and wear resistance of the surface and reducing the wear caused by friction, thereby extending the service life of the nut.
Hardness improvement: A high-hardness surface can more effectively resist the effects of external pressure and friction, reduce the plastic deformation or wear of the material caused by long-term stress, and maintain the stability of the shape and size of the nut.
Wear resistance enhancement: Wear-resistant coating can effectively reduce the loss of material during friction, prevent loosening or failure caused by wear, and ensure the reliability of the connection.
2. Hot dip treatment: An effective means to improve wear resistance and oxidation resistance
Hot dip plating is a process in which a workpiece is immersed in molten metal liquid to form a metal coating on its surface through a chemical reaction. For hub axle nuts, hot-dip plating can not only significantly improve the hardness and wear resistance of the surface, but also enhance its oxidation resistance and effectively resist corrosion in harsh environments.
Zinc plating: It is one of the most common hot-dip plating materials and is widely used due to its good anti-corrosion performance and cost-effectiveness. Zinc plating can effectively isolate the nut from direct contact with the environment and slow down the corrosion rate.
Aluminum plating: Compared with zinc plating, aluminum plating has higher high temperature resistance and lighter weight, which is suitable for nut protection in high temperature working environments.
3. Special coating: Innovative application of materials such as epoxy resin
In addition to traditional metal plating, some special materials such as epoxy resin are also used for the surface coating of hub axle nuts to further improve their friction performance and durability.
Epoxy resin coating: It has excellent adhesion and chemical corrosion resistance, and can effectively protect the nut from environmental erosion. At the same time, by adjusting the formula, epoxy resin coating can also provide a certain lubrication effect, reduce friction resistance, and improve assembly efficiency.
Ceramic coating: Such as aluminum oxide, silicon nitride, etc., have extremely high hardness and wear resistance, suitable for nut protection under extreme conditions. Ceramic coating can not only effectively extend the service life of the nut, but also improve the friction characteristics to a certain extent, reducing friction heat and wear.
