Effects Of The Micro/nano Textured Tool Surface Wettability On The Antifriction Performance

At present,the tribology research indicates that the surface texture can effectively reduce the friction force of the friction pair interface,then the antifriction performance can be achieved.Meanwhile,the antifriction performance can be further improved by introducing the wettability technology to the surface texture,which provides a novel feasible approach to improve the antifriction performance.In view of the problem of rapid tool wear in cutting 15-5PH stainless steel with solution treatment,the influence of the micro/nano textured tool surface wettability on the tribological properties and cutting performance was investigated.The major works are included as follows:(1)The influence of the scanning velocity,energy density and processing times on the dimension and morphology of the YT15 tool surface texture was studied.The hierarchical micro/nano texture was successfully fabricated on the tool surface by optimizing processing parameters.Fluorinated treatment was carried out on the micro/nano textured tool surface.Then a nano-scaled hydrophobic and oleophobic layer was self-assembled on this surface,which reduced the surface wettability.(2)The friction and wear tests were conducted between the YT15 cemented carbide tool and the 15-5PH stainless steel with solution treatment by a reciprocating friction and wear tester.The influence of the micro/nano textured tool surface wettability on the friction coefficient was studied.The results showed that the friction coefficient on the friction interface was influenced by contact pressure and crank speed.Compared with the untextured tool,the oleophilic and oleophobic micro/nano textured tool both possessed a certain antifriction effect and the oleophobic micro/nano textured tool worked best.(3)The cutting experiments were carried out to study the influence of the micro/nano textured tool surface wettability on the cutting force,average friction coefficient on the rake face,cutting temperature in the condition of minimum quantity lubrication.The antifriction and antiwear performance were compared and analyzed simultaneously.The acting mechanism of the oleophilic and oleophobic micro/nano texture on the tool surface was also explained.