聚晶金刚石刀具低温冷却铣削C/SiC磨损机理  

Wear Mechanism of Polycrystalline Diamond Tool in Cryogenic Cooling Milling of Cf/SiC Composite

作　　者：王凯 徐亮[1] 王新永[1] 严伟容 王松 房金铭 焦星剑 李军平[1] 赵国龙[2] 张健强 WANG Kai;XU Liang;WANG Xin-yong;YAN Wei-rong;WANG Song;FANG Jin-ming;JIAO Xing-jian;LI Jun-ping;ZHAO Guo-long;ZHANG Jian-qiang(Science and Technology on Advanced Functional Composites Laboratory, Aerospace Research Institute of Materials & Processing Technology, Beijing 100076,China;College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)

机构地区：[1]航天材料及工艺研究所先进功能复合材料技术重点实验室,北京100076 [2]南京航空航天大学机电学院,南京210016

出　　处：《科学技术与工程》2021年第26期11125-11129,共5页Science Technology and Engineering

基　　金：先进功能复合材料技术重点实验室稳定支持项目(790006020603030215121905)。

摘　　要：采用聚晶金刚石(PCD)刀具对C_(f)/SiC陶瓷基复合材料进行干式和低温冷却铣削试验,获得了PCD刀具在干式和低温冷却铣削条件下的前刀面和后刀面磨损形貌,测得了不同铣削长度所对应的主切削力和后刀面磨损量,分析了PCD刀具在不同铣削条件下的磨损机理及寿命可靠性。研究表明:在低温冷却条件下,PCD刀具以磨粒磨损为主要磨损机理,失效表面存在明显沟槽磨损和大量长条状划痕;而在干式铣削条件下,PCD刀具以磨粒磨损和局部氧化磨损为主要磨损机理,失效表面呈现均匀的磨损带;低温冷却使PCD刀具有效使用寿命提高约100%。C_(f)/SiC composite was machined by polycrystalline diamond(PCD)tools under both the dry and cryogenic cooling conditions,obtaining wear morphology of the rake and flank surfaces.The relationship curves of the major cutting force and wear width of the flank surface versus cutting length were conducted,and wear mechanisms and life stability of PCD tools were also studied.The results show that the major wear mechanism of PCD tools is abrasive wear under the cryogenic cooling condition,while the major wear mechanisms of PCD tools are abrasive wear and oxidation wear at the dry condition.The tool usage life under the cryogenic cooling condition is approximately added up to 100%than that of at the dry condition.

关 键 词：CF/SIC陶瓷基复合材料 低温冷却铣削 聚晶金刚石刀具 磨损形貌 失效机理 

分 类 号：TG506[金属学及工艺—金属切削加工及机床]