南京航空航天大学学报（英文版）2007，Vol.24Issue(2)：106-111,6.
新型AlTiN涂层钻头高效干式钻削40Cr的开发与试验
DEVELOPMENT AND EXPERIMENT OF NEW AlTiN COATED DRILLS FOR HIGH EFFICIENCY DRY DRILLING OF 40Cr
摘要
Abstract
Two new AlTiN coated cemented carbide drills with Al content of 40% and 55% in weight are developed for high efficiency dry drilling of 40Cr. By studying tool durability, machined hole quality, tool wear mechanism, chip deformation, and lubrication, the dry drilling performance of the two kinds of coated drills is analyzed. Experimental results show that the AlTiN coated drills are suitable for high efficiency dry drilling and can obtain higher quality of machined holes. The tool durability of the drill with 55% Al content is 1. 3 times of that of the drill with 40% Al content at the cutting speed of 90 m/min. The wear mechanism of two AlTiN coatings are studied in experiments. During dry drilling process, oxidative wear appears in both two kinds of drills. The oxide film is formed on the top of the coated drill containing Al content of 55%. And the oxide film helps to increase its high temperature resistance and decrease the coating flaking, thus the drill is failed because of coating subsidence. The drill with less Al content is failed due to peeling and breakage. The lubricated condition in dry drilling is improved by the high Al content coating. It helps to reduce the cutting deformation and benefits to improve the quality of machined holes. The AlTiN coating with higher Al content shows longer tool life and higher quality of machined holes in high efficiency dry drilling. Its tool life increases by 30% compared with that of the coating with less Al content.关键词
高效加工/涂层/AlTiN/干式钻削/40CrKey words
high efficiency machining/coating/AlTiN/dry drilling/40Cr分类
矿业与冶金引用本文复制引用
沈中,刘钢,陈明..新型AlTiN涂层钻头高效干式钻削40Cr的开发与试验[J].南京航空航天大学学报（英文版）,2007,24(2):106-111,6.基金项目
国家自然科学基金(50675134)资助项目 （50675134）
航空基础科学基金(04H57001)资助项目 （04H57001）
国家科技型中小企业技术创新基金(04C26213101122)资助项目 （04C26213101122）
教育部新世纪优秀人才支持计划(NCET-04-0384)资助项目.Supported by the National Natural Science Foundation of China (50675134) （NCET-04-0384）
the Aviation Fundamental Science Foundation of China (04H57001) （04H57001）
the National Innovation Foundation for Small Technology-Based Firms of China (04C26213101122) （04C26213101122）
the New Century Excel Talent Projiect(NCET-04-0384). （NCET-04-0384）
