Effects of Nitrogen Ion Implantation Parameters on Adhesion of WC–DLC Coatings to 9310 Steel
LUO Yang1 , RAN Biao1 , TANG Menglan2 , YANG Zhao3 , XIE Huanjun2 , LIU Hui4 , LI Liuhe1
( 1 .School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China; 2. AECC Zhongchuan Transmission Machinery Co., Ltd., Changsha 410200, China; 3. Aviation Military Representative Office of the Army Armament Department Aviation Military Representative Bureau in Zhuzhou, Zhuzhou 412000, China; 4. AECC Hunan Aviation Powerplant Research Institute, Zhuzhou 412002, China )
Abstract：When the WC–DLC films were applied to the surface of 9310 steel by physical vapor deposition (PVD) technology, the film was prone to split off due to the internal stress of the DLC coatings and the mechanical property differences between the steel matrix and the film. Ion implantation pretreatment on the gear steel surface is one of the methods to enhance coating adhesion to the substrate. In this paper, the effects of different nitrogen ion implantation time and implantation voltage on the substrate surface hardness, coating adhesion and tribological properties were investigated. It was found that the implantation voltage increased from 10kV to 20kV, the hardness of the 9310 steel surface increased from 7.34GPa to 8.36GPa, the adhesion of the coatings to substrate increased from 39.9N to 49.3N, the surface friction coefficient of the film decreased from 0.161 to 0.119, and the wear depth of the tribology test decreased from 2.39 to 2.03, respectively. When the implantation time increased from 1h to 3h, the hardness of the 9310 steel surface increased from 7.06GPa to 8.84GPa, the adhesion increased from 34.1N to 49.9N, the surface friction coefficient of the film decreased from 0.161 to 0.118, and the friction depth of the film tribology test decreased from 2.48 to 1.99, respectively
2020, 
