Al_2O_3/Ti(C,N)-Ni-Ti陶瓷刀具的切削性能  

Cutting Performance of Al_2O_3/Ti(C,N)-Ni-Ti Ceramic Cutting Tool

作　　者：李乾[1] 曹秀娟[2] 修稚萌[1] 孙旭东[1] 

机构地区：[1]东北大学材料各向异性与织构教育部重点实验室,辽宁沈阳110819 [2]东北大学机械工程与自动化学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2013年第2期214-217,226,共5页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金资助项目(51072030);中央高校基本科研业务费专项资金资助项目(N100702001)

摘　　要：研究了Al2O3/Ti(C,N)-Ni-Ti陶瓷复合刀具对淬硬35CrMo合金钢进行连续干切削时各切削参数对切削力的影响.结果表明:切削深度对切削力的影响最显著,切削速度的影响最小.对比研究了Al2O3/Ti(C,N)和Al2O3/Ti(C,N)-Ni-Ti陶瓷刀具的耐磨性能和磨损形态:后者的耐磨性能明显优于前者,其中Al2O3/Ti(C,N)-5%(Ni,Ti)的耐磨性能最高.Al2O3/Ti(C,N)-Ni-Ti刀具的磨损形态主要表现为后刀面的磨粒磨损和疲劳磨损,由于这种材料具有较高的弯曲强度和断裂韧性,能有效防止前刀面出现崩刃破损现象,因此具有较高的可靠性,适用于高速切削.在高速切削条件(ap=0.06 mm,vc=254.9 m/min,vf=0.09 mm/r)下,Al2O3/Ti(C,N)-5%(Ni,Ti)刀具的切削耐用度为150 min.The influence of cutting parameters on cutting force was investigated during continuous dry-cutting of the quench hardened 35CrMo alloy steel using the Al2O3/Ti（C,N）-Ni-Ti composite cutting tool.The results indicate that the cutting depth has the most significant influence,while the cutting speed has the smallest.The abrasion performance and cutting lifetime of the Al2O3/Ti（C,N） and the Al2O3/Ti（C,N）-Ni-Ti cutting tools were studied.The cutting lifetime of the latter one is significantly longer,and that of the Al2O3/Ti（C,N）-5vol%（Ni,Ti） composite is the longest.The Al2O3/Ti（C,N）-Ni-Ti cutting tools are mainly characterized with abrasive abrasion and fatigue wear.Due to their higher bending strength and fracture toughness,they are less susceptible to chipping and breakage,which enable them more suitable for high-speed cutting.Under the high-speed cutting conditions（ap=0.06 mm,vc=254.9 m/min and vf=0.09 mm/r）,the cutting lifetime of the Al2O3-Ti（C,N）-5vol%（Ni,Ti） composite cutting tool is 150 min.

关 键 词：陶瓷复合材料 刀具 AL2O3 TI(C N) Ni Ti 可靠性 耐用度 

分 类 号：TQ174.75[化学工程—陶瓷工业]