How are the small holes on the surface of the cross roller bearing ring formed?

How are the small holes on the surface of the cross roller bearing ring formed?
时间：2024-09-30 人气：

On the surface of the crossed roller bearing rings, single or multiple quasi-circular or oblong black dot-like holes are often found. Single point defects may be mistaken for material defects, but they are not. , Helvetica, Arial, sans-serif; font-size: 14px; text-wrap: wrap; background-color: rgb(255, 255, 255);">


　　1. The formation principle of small holes on the surface of crossed roller bearing rings

　　2. The formation principle of small holes on the surface of crossed roller bearing rings

　　3. The formation principle of small holes on the surface of crossed roller bearing rings


　　After the passivation film on the surface of the bearing metal is damaged, its surface is in an active dissolution state. This is an irreversible reaction. The concentration of h in the pore increases, and the electrochromic change of the ion, if the anion is Cl-, is the same as continuously adding HCl solution to the pore as the corrosion of the pore intensifies.


　　The reason for the damage of the passivation film is that the metal surface of the cross roller bearing has large composition changes, non-metallic inclusions, foreign matter adhesion, mechanical damage, cracks in the oxide film and other chemical or physical properties. Inhomogeneity, the surface passivation film may be damaged.

  alt="rPthXJV0Smy-x303OnysLw.jpg"/>

　　2. Characteristics of small holes on the surface of crossed roller bearing rings


　　The characteristic of small hole corrosion on the surface of the cross roller bearing ring is that the point defects are longitudinally dissected and observed under a microscope. It is found that the cross-sectional morphology of the corrosion hole is perpendicular to the surface.


　　3. The influence of small holes on the surface of crossed roller bearing rings


The corrosion of small holes not only affects the precision and surface roughness of the crossed roller bearings, but also reduces the service life and leads to scrapping, which should be given enough attention. At the same time, the speed of the production process should be accelerated to prevent damage caused by various collisions.


　　4. Treatment technology of small holes on the surface of cross roller bearing shaft ring



　　If the piston rod bearing ring has surface corrosion with small holes, it can be handled according to the following steps.


　　1. When small holes are formed on the surface of parts, appropriate grinding amount should be adopted to grind the corrosion holes as much as possible without leaving any residue;


　　2. Prevent corrosion from happening again through chemical or electrochemical methods such as spraying anti-rust liquid.


　　3. Attention must also be paid during production.


　　4. Improve the metal potential, restore the passivation film on the metal surface, and soak the cross roller bearing parts after rust removal in anti-rust liquid for a period of time.


　　5. Measures to prevent small holes on the surface of crossed roller bearing rings


　　1、保持零件表面清洁


　　根据以上的形成机理，形成小孔进行腐蚀的条件之一是钝化皮膜的表面不清洁后受到损伤。 因此，保持表面清洁，预防小孔腐蚀须重视表面防护。


　　2、避免物理和化学损伤


　　其次，为了避免物理和化学损伤，为交叉滚子轴承提供良好的保存环境，避免凹痕。


　　以上介绍的就是交叉滚子轴承套圈表面小孔怎么形成的，如需了解更多可随时联系我们!


How are the small holes on the surface of the cross roller bearing ring formed?
页面版权所有 ©2024 洛阳汇工轴承科技有限公司 网站建设：河南品讯网络科技有限公司