聚晶金刚石刀具低温冷却铣削SiC/SiC复合材料磨损试验研究OACSTPCD
Wear Experimentand Reserch of Poly crystalline Diamond Tools on SiC/SiC Composite Milling under Cryogenic Cooling Condition
采用超硬聚晶金刚石(PCD)刀具对SiC/SiC陶瓷基复合材料进行干式和低温液氮冷却铣削试验研究,获得PCD刀具在干式和低温液氮冷却铣削条件下的前刀面和后刀面磨损形貌;分析PCD刀具在干式和低温液氮冷却铣削条件下的主要磨损形式,测得PCD刀具在干式和低温液氮冷却铣削条件下的刀具使用寿命.研究表明:在干式铣削条件下,PCD刀具前刀面的主要磨损形式为刀尖磨钝和崩刃;而在低温液氮冷却铣削条件下,PCD刀具前刀面的主要磨损形式为刀尖磨钝和微剥落;与干式铣削条件相比,PCD刀具在低温液氮冷却铣削条件下寿命提高约71.4％.
Polycrystalline diamond(PCD)tools were used to mill SiC/SiC composite under dry and cryogenic cooling conditions,obtaining wear morphology of the rake and flank surfaces on the PCD tool.The wear modes of the PCD tools were analyzed,and the tool service life was measured.The reserch results show that the major wear modes of the PCD tools are tool nose fracture and edge tripping under the dry milling condition,while the major wear modes are tool nose fracture and spalling under the cryogenic cooling condition.To compare with the PCD tool under the dry cutting condition,the usage life of the PCD tools under the cryogenic cooling condition increases up to 71.4％.
王凯;李军平;赵国龙;年智文;徐亮;王新永;裴天河;魏金花;钟扬;闫卫东;王松;金恩泽
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南京航空航天大学机电学院,江苏南京 210016
金属材料
SiC/SiC复合材料干式铣削低温液氮冷却铣削PCD刀具磨损形貌磨损形式
SiC/SiC compositesdry millingcryogenic cooling millingPCD toolwear morphologywear mode
《机械制造与自动化》 2024 (003)
32-36 / 5
先进功能复合材料技术重点实验室开放基金项目(6142906210610)
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