Al_2O_3/TiCN涂层刀具的滑动磨损性能及切削性能研究  

Sliding Wear Performance and Cutting Performance of the Al_2O_3/TiCN Coated Tool

作　　者：郑光明[1] 程祥[1] 杨先海[1] 徐汝锋[1] 赵军[2] ZHENG Guangming;CHENG Xiang;YANG Xianhai;XU Rufeng;ZHAO Jun(School of Mechanical Engineering, Shandong University of Technology, Shandong Zibo 255000, China;School of Mechanical Engineering, Shandong University, Shandong Ji＇nan 250061, China)

机构地区：[1]山东理工大学机械工程学院,山东淄博255000 [2]山东大学机械工程学院,山东济南250061

出　　处：《摩擦学学报》2018年第3期356-363,共8页Tribology

基　　金：国家自然科学基金项目(51505264);山东省优秀中青年科学家科研奖励基金项目(BS2014ZZ005);淄博市校城融合发展计划(2017ZBXC032);山东理工大学青年教师发展支持计划项目资助~~

摘　　要：进行了滑动摩擦磨损和高速干切削试验,研究了Al_2O_3/TiCN涂层硬质合金刀具材料的磨损机理.结果表明:摩擦系数随着滑动速度的增加而减小,在FN=10 N时,摩擦系数最大.随着载荷和滑动速度的增加,磨损率有减小的趋势.受摩擦力和摩擦热的作用,在涂层刀具材料表面形成鱼鳞状的粘结层,随着速度和载荷增加,粘结的金属材料增多.在刀具前刀面靠近刀尖处形成了耐磨氧化物,提高刀具抗磨损性能,但在后刀面易形成少量的铁氧化物,加剧刀具磨损.其中,在刀具材料磨损表面形成的次生粘结层或氧化薄膜(如TiO_2、SiO_2),起到了润滑、减摩的作用,有利于刀具材料耐磨性能的提高.本文中的研究成果可望在指导高强度钢类材料的高效、高质量加工中发挥积极地作用.The wear mechanisms of the Al2O3/TiCN coating carbide cutting tool were investigated by sliding friction and high-speed turning experiments. The experimental environment was in air with dry conditions. The results indicate that the friction coefficient decreased with the increase of sliding speed, and the highest friction coefficient was obtained at FN=10 N. As the load and sliding speed increased, the wear rate tended to decrease. During the dry sliding wear process, a scale-like adhesion layer was presented on the coated tool surface, which was contributed by the high friction force and friction heat. Moreover, the amount of the adhesion metal material increased with the sliding speed and load.During the high-speed dry turning process, the wear-resistant oxides formed near the tool nose on the rake face, which improved the tool wear resistance. However, on the flank face, it was easy to form a small amount of iron oxide which deteriorated the tool wear. On the tool surface, the secondary adhesion layer or oxide film（e.g. TiO2, SiO2） was lubricious, which was in favor of improving the wear resistance of the coated tool. The results were expected to play an active role in guiding the high-efficiency and high quality machining of high-strength steel materials.

关 键 词：滑动磨损 切削性能 涂层刀具 磨损率 磨损机理 

分 类 号：TG506.1[金属学及工艺—金属切削加工及机床]