Heat Treatment of Metals ›› 2023, Vol. 48 ›› Issue (12): 250-254.DOI: 10.13251/j.issn.0254-6051.2023.12.041

• MATERIALS RESEARCH • Previous Articles     Next Articles

Effect of bionic hexagonal texture on tribological properties of 40Cr steel

Yang Yang1,2, Long Weimin1,3, Cheng Zhan1, Wu Lifeng1,2, Shi Lubing3, Wu Yuanke4   

  1. 1. China Academy of Machinery Science and Technology Group, Beijing 100044, China;
    2. Ningbo Intelligent Machine Tool Research Institute Co., Ltd., of China National Machinery Institute Group, Ningbo Zhejiang 315700, China;
    3. Zhengzhou Research Institute of Mechanical Engineering Co., Ltd., Zhengzhou Henan 450001, China;
    4. China Railway Engineering Equipment Group Co., Ltd., Zhengzhou Henan 450016, China
  • Received:2023-07-09 Revised:2023-10-09 Online:2023-12-25 Published:2024-01-29

Abstract: Bionic hexagonal textures with different area densities were processed on the surface of 40Cr steel by laser processing technology. Friction and wear tests were carried out on high temperature tribometer under oil lubrication conditions. The influence in variation of rotational speed and load on the tribological properties of bionic hexagonal texture with different area density was studied. The wear morphology of the specimen surface was analyzed by means of metallurgical microscope. The results show that the friction coefficient of surface textured specimens is lower than that of un-textured specimens, decreases first and then increases with the increase of texture density. The friction coefficient of the specimen with texture density of 10% is 9.8% lower than that of the untextured surface. Wear resistance is improved. The friction coefficient of low density textured specimens increases first and then decreases with the increase of load, and the friction coefficient of high density decreases with the increase of load. The friction coefficient of the specimen decreases with the increase of speed. Under the condition of oil lubrication, the bionic hexagonal texture can effectively improve the friction and wear properties of the friction pair surface, and the reasonable texture area density can maximize the friction reduction effect of the bionic texture.

Key words: 40Cr steel, laser processing, bionic hexagonal texture, friction coefficient, oil lubrication

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