低温微量润滑高速加工300 M钢刀具磨损研究  

Tool Wear of High-speed Machining 300 M Steel Under CMQL Condition

作　　者：张慧萍[1] 王尊晶 刘国梁[1] ZHANG Hui-ping;WANG Zun-jing;LIU Guo-liang(School of Mechanical and Dynamic Engineering, Harbin University of Science and Technology, Harbin 150080, China)

机构地区：[1]哈尔滨理工大学机械动力工程学院,哈尔滨150080

出　　处：《哈尔滨理工大学学报》2020年第3期75-82,共8页Journal of Harbin University of Science and Technology

基　　金：国家自然科学基金(51575145)。

摘　　要：针对难加工材料300 M钢的加工性能差、刀具磨损严重等问题,进行了干式与低温微量润滑两种加工条件下的高速铣削300 M钢刀具磨损试验。采用超景深显微镜观察了刀具的磨损形貌,通过电子扫描显微镜(SEM)分析了刀具的磨损机理。结果表明:PVD涂层保护刀具的效果好于无涂层刀具和CVD涂层刀具;冷风温度为-45℃、空气压力为0.7 MPa、油量为40 mL/h时,低温微量润滑技术的作用效果最佳;兼顾加工质量与加工效率时,铣削速度定为400 m/min为宜;相比于干式切削,低温微量润滑技术能够有效降低刀片磨粒磨损、刀片表面的粘结磨损、后刀面边界处的氧化磨损,以及轻度的扩散磨损。For the problem of poor processing performance and severe tool wear of hard-to-manufactured material 300 M steel,high-speed milling 300 M steel tool wear test of dry and CMQL was carried out.The wear morphology of the tool was observed with an ultra-deep-depth microscope,and the wear mechanism of the tool was analyzed with a scanning electron microscope(SEM).The results show that PVD coatings protect the tool better than uncoated and CVD coated tools;When the cold air temperature is-45℃,the air pressure is 0.7 MPa,and the oil volume is 40 mL/h,the effect of CMQL technology is the best;When considering the processing quality and processing efficiency,the milling speed is set to 400 m/min;Compared to dry cutting,CMQL technology can effectively reduce abrasive wear of the blade,bond wear on the blade surface,oxidative wear at the flank boundary,and mild diffusion wear.

关 键 词：300 M钢 低温微量润滑 高速铣削 刀具磨损 

分 类 号：TG501[金属学及工艺—金属切削加工及机床]