Green manufacturing technologies of CrTiAlN composite coatings as an alternative to chromium electroplating for piston rings
As an alternative to chromium electroplating for piston rings, one green manufacturing technology of CrTiAlN composite coatings has been introduced in this paper. In addition the mechanical and tribological properties of CrTiAlN composite coatings have been compared with chromium electroplating and CrN films. During the deposition of CrTiAlN composite coatings, the three processing steps in deposition involved were plasma ion cleaning, buffer layer deposition, and multi-component layer deposition. During the final deposition step, nitrogen concentration was controlled at 0～50 ％. The metallic ratio of Cr,Ti,and Al was varied by adjusting the target currents. The nano-indenter, ehergy dispersive X-ray(EDX), scanning electron microscopy and X-ray diffraction instrument were used to investigate the mechanical property and microstructure of the coatings. The experimental results showed that the optimized quaternary Cr-Ti-Al-N coating performs better than binary CrN as well as the conventional hard chromium plating in teams of hardness and wear resistance，which was suited to use under the high temperature condition of piston rings，and they can be proposed as an alternative to hard chromium platings.
Green manufacturing piston rings CrAlTiN composite coatings chrome electroplating alternatives
Cai Zhihai Zhang Ping Zhao Junjun Du Jun
National Key Laboratory for Remanufacturing, Academy of Armored Force Engineering, Beijing100072，P.R. China
国际会议
宁波
英文
370-374
2010-01-11（万方平台首次上网日期，不代表论文的发表时间）