What effect does surface treatment have on the performance of deep groove ball bearings

As an indispensable key component in modern mechanical equipment, the optimization of deep groove ball bearings has significantly improved their performance, especially in terms of wear resistance, fatigue strength, corrosion resistance and lubrication performance. By adopting advanced surface treatment technology, the service life of bearings can be effectively extended and their reliability under various working conditions can be improved.

First, the wear resistance of deep groove ball bearings has been significantly improved through refined surface treatment technology. In high-speed operation or heavy-load working environments, the bearing surface is subjected to huge friction. The use of surface treatment processes such as grinding and polishing can significantly improve the smoothness of the material surface, thereby reducing the friction coefficient. For example, the surface of the bearing that has been precisely ground can achieve extremely low roughness. Such treatment makes the contact between the rolling element and the ring smoother, reducing the heat and wear generated by friction. In addition, the application of advanced coating technologies such as physical vapor deposition (PVD) to form a diamond coating on the bearing raceway can effectively resist the erosion of external wear media and further extend the service life of the bearing.

Secondly, surface treatment also has an important influence on the fatigue strength of deep groove ball bearings. During long-term operation, the alternating stress on the bearings can easily lead to fatigue cracks. Through reasonable surface treatment processes, the residual stress distribution on the surface of the rolling element can be optimized to form beneficial compressive stress. For example, the bainite quenching heat treatment process and isothermal quenching treatment can significantly improve the impact toughness and surface compressive stress of the bearing, thereby reducing the risk of inner sleeve cracking during assembly and outer sleeve edge falling off and inner sleeve fragmentation during use. The existence of this compressive stress can effectively inhibit the initiation and expansion of fatigue cracks, thereby significantly improving the fatigue life of the bearing.

In terms of corrosion resistance, surface treatment technology provides a solid protective barrier for deep groove ball bearings. In harsh environments such as humid and corrosive media, bearings are prone to corrosion, resulting in performance degradation or even failure. Through electrogalvanizing, chrome plating or oxidation treatment, a dense protective film can be formed on the bearing surface to effectively block the erosion of external harmful substances. For example, the corrosion resistance of surface-treated stainless steel materials has been significantly enhanced, and they can operate stably for a long time in corrosive environments such as strong acids and alkalis, ensuring the safety and reliability of the bearings.

In addition, surface treatment improves the lubrication performance of deep groove ball bearings. Smooth surfaces help form lubricating oil films, effectively reducing the risk of dry friction and energy loss. Surface treatment technologies for certain porous materials, such as the pore structure of sintered bronze, can act as micro-oil reservoirs to ensure that the necessary lubrication supply can still be provided under intermittent operation or heavy load conditions, thereby greatly reducing wear and improving work efficiency. At the same time, reasonable surface roughness also plays a key role in the effectiveness of lubricating oil films. By controlling the surface roughness and matching the oil film thickness with the morphology of the rolling element and raceway contact surface, the lubrication effect can be further improved and friction and wear can be reduced.