What are the causes of dents and cracks in the complete set of coating equipment? Below, the manufacturer of the complete set of coating equipment will provide you with a detailed introduction.
When the complete set of coating equipment is subjected to high alternating stress on the two contact surfaces of the friction pair, and due to improper material selection (such as low material plasticity) or poor lubrication, dents and initial cracks may occur during the running in stage. As the number of times the equipment is subjected to pulsating loads increases, the cracks at the dents continue to expand, becoming pockmarked pits. In severe cases, the equipment can cause failure of the components.
During the friction process, a chemical or electrochemical reaction occurs between the friction surface and the surrounding medium, and under the mechanical action between the surfaces of the coating equipment, material loss occurs, which is called corrosion wear. The equipment includes two processes of corrosion phase wear, which can be sequential and can be exacerbated in high temperature and humid environments.
When the surface pressure of the coating equipment is greater than 0.55 times the shear strength of the material, cracks appear inside the parts. The coating equipment gradually occurs, with deeper peeling, mostly occurring on rolling bearings. According to whether it has expandability, it can be divided into non expandable surface fatigue wear and expandable surface fatigue wear. Non expandable surface fatigue wear occurs on the friction surface of new equipment. Due to the unevenness of the surface, the actual contact area is only a small part. The complete set of coating equipment bears a larger ER force per unit area, combined with the pulse cyclic stress it bears, resulting in surface contact fatigue, fracture, and delamination, forming dents.
The above is a summary of the reasons for dents and cracks in coating equipment. We hope it is helpful to you. If you have any questions, please feel free to contact us. Follow our official website to learn more about coating equipment.
