Вплив режимів шліфування на основні параметри якості поверхневих шарів газових підшипників та їх експлуатаційні властивості

Abstract

The article examines the impact of grinding modes on the quality of gas bearing surface layers and their performance properties. It emphasizes the importance of surface integrity in gas bearings, highlighting how grinding parameters affect key attributes such as microhardness, wear resistance, fatigue strength, and contact strength. Special attention is given to nitriding and nitrohardening technologies, which significantly improve steel hardness and wear resistance. The article also discusses electrical erosion diamond grinding, a precise technique for finishing hard-tomachine materials. This method, with its thermodynamic characteristics, provides a solution for controlling surface layer modifications and fine-tuning material properties to ensure the desired quality of bearing surfaces. A particular focus is placed on the formation of white layers during grinding, which consist of austenitic-martensitic structures. These layers are known for their high microhardness and distinct properties compared to the base material. The article explores how grinding parameters, such as wheel speed, feed rate, and depth of cut, influence the formation of these layers. It also addresses how temperature and mechanical stresses during grinding contribute to the development of surface layers that enhance wear resistance but may also cause residual stresses that affect fatigue life. The article proposes a structural diagram to illustrate the stages of phase transformations during grinding, highlighting the interplay between thermal, mechanical, and material factors. This model helps predict and control structural changes in gas bearing surface layers, optimizing their performance properties. In conclusion, the article stresses the importance of optimizing grinding modes to improve the quality of surface layers, enhancing the performance of gas bearings. It calls for further research into the thermodynamic and mechanical aspects of grinding, particularly regarding phase transformations and the formation of surface structures that contribute to the durability and reliability of gas bearings. Optimizing grinding parameters and incorporating advanced hardening technologies will improve bearing performance and longevity, ensuring their effectiveness in demanding applications.