Experimental Study on Tribological Properties of Laser Textured 45 Steel Surface

• Main Authors: Li, Zhi Peng, Wu, Jin He, Wu, Na, Li, Dong Xu
• Format: Conference Proceeding
• Language: English
• Subjects: Coefficient of friction; Design of experiments; Diameters; Friction; Friction reduction; Laser beam texturing; Laser machining; Lubrication; Mechanical properties; Medium carbon steels; Micromachining; Morphology; Neodymium lasers; Orthogonal experimental design; Parameters; Pits; Semiconductor lasers; Surface layers; Surface micro-texture; Texture; Tribological properties; Tribology; Wear; YAG lasers
• ISSN: 2261-236X; 2274-7214; 2261-236X
• DOI: 10.1051/matecconf/20166302022

In order to study the influence of pits’ size parameters on the tribological properties of textured friction pairs, using the Nd:YAG laser micro machining system and the “single pulse at the same point, interval more times” processing technics to process the pits on the surface of 45 steel. The dimension parameters of pits texture were obtained by orthogonal experimental design. The tribological experiment of GCr15 pin/45 steel disc was carried out by UMT-2 test machine. The surface morphology of the specimens was analyzed by using scanning electron microscopy. The experimental results show that the pits texture on the surface of 45 steel can effectively reduce the friction coefficient and the wear on the condition of oil-rich lubrication. The textured specimen with diameter 60μm, depth 6μm and surface density 10% has the lowest friction coefficient, and the friction coefficient is reduced by 21% compared with the smooth specimen. By analyzing the wear morphology on the surface of 45 steel, it is found that the surface of pits texture can obviously reduce the wear.