Preparation of Hydrophobic Surface on Titanium by Micro-Rolling and Laser Diffusion Carbonitriding  

作　　者：唐普洪 FENG Chongyou XU Laitao ZHANG Jiabo 

机构地区：[1]Institute of Mechanical Design,Jiaxing Vocational Technical College,Jiaxing 314036,China [2]Department of Material Science Engineering,Northwestern University,2145 Sheridan Road,Evanston,IL,60208,USA

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2016年第3期533-537,共5页武汉理工大学学报（材料科学英文版）

基　　金：Funded by Zhejiang Provincial Natural Science Foundation(No.LQ12E05010);the Jiaxing Science Planning Project(No.2013AY11025)

摘　　要：The application of rolling for fabricating grate on titanium stripe has been explored in this paper. Then the mechanically robust Ti（C,N） diffusion layer was synthetized directly on the grates by laser carbonitriding in the mixture gas of nitrogen and methane. The results shows that the carbonitriding process is accelerated by temperature enhancement with decreasing scanning speed, The Ti（C,N） diffusion layer is kept at 2 ~nn in thickness, when the scanning speed is smaller than 4 mm/s. The contact angle increases from 20~ to 143.6~ by designing an appropriate grate size and surface roughness. Meanwhile, the relationship between hydrophobicity, hardness performance and scanning speed is also discussed. The hardness of diffusion layer increases with decreasing laser scanning speed, and is up to 11.2 GPa. The surface structure and hydrophobic state are maintained after three cycles of sandpaper abrasion, which has improved the robustness of surface grate.The application of rolling for fabricating grate on titanium stripe has been explored in this paper. Then the mechanically robust Ti（C,N） diffusion layer was synthetized directly on the grates by laser carbonitriding in the mixture gas of nitrogen and methane. The results shows that the carbonitriding process is accelerated by temperature enhancement with decreasing scanning speed, The Ti（C,N） diffusion layer is kept at 2 ~nn in thickness, when the scanning speed is smaller than 4 mm/s. The contact angle increases from 20~ to 143.6~ by designing an appropriate grate size and surface roughness. Meanwhile, the relationship between hydrophobicity, hardness performance and scanning speed is also discussed. The hardness of diffusion layer increases with decreasing laser scanning speed, and is up to 11.2 GPa. The surface structure and hydrophobic state are maintained after three cycles of sandpaper abrasion, which has improved the robustness of surface grate.

关 键 词：TITANIUM hydrophobic surface micro-rolling laser diffusion carbonitriding （LDC） 

分 类 号：TG178[金属学及工艺—金属表面处理] TG339[金属学及工艺—金属学]