PCBN刀具高速切削淬硬轴承钢的磨损机理研究  

Wear mechanism of the PCBN cutting tools in high speed cutting of hardened bearing steel

作　　者：邓福铭[1,2,3] 邓雯丽[1,2] 杨雪峰[1] 张盼[1] 刘瑞平[1,2,3] 马向东[1,2] 

机构地区：[1]中国矿业大学(北京)超硬刀具材料研究所,北京100083 [2]中国矿业大学(北京)高压新材料研发中心,北京100083 [3]北京潭龙叶蜡石传压密封技术研究中心,北京102300

出　　处：《金刚石与磨料磨具工程》2016年第5期50-54,共5页Diamond & Abrasives Engineering

基　　金：高等学校博士学科点专项科研基金(No.20120023110016);北京市自然科学基金与北京市科学技术研究院联合基金(No.L150012)资助

摘　　要：采用美国D.I.公司生产的BZN9000作为刀具材料制成PCBN刀具,在沈阳机床厂生产的CA6140A车床上对GCr15淬硬轴承钢进行高速切削试验。对切削试验后刀具的前、后刀面进行SEM形貌观察和EDS能谱分析,结果表明:PCBN刀具在高速切削过程中,机械磨损、黏着扩散磨损和化学磨损是刀具磨损的主要形式;前刀面磨损主要为月牙洼磨损,切削刃处、月牙洼后、前刀面处的黏着元素扩散比月牙洼底部还要严重;对后刀面的WDS线能谱分析证实,切削刃处的黏着元素扩散比后刀面要严重。The BZN9000 compacts from D.I.Company in the USA is selected and its high speed cutting experiments are carried out on the GCr15 hardened bearing steel ring by using the CA6140 Alathe.The morphologies and the element contents of rake and flank face of the PCBN tool are observed and analyzed by means of SEM,EDS and WDS respectively.It is found that the main wear forms of the PCBN tool are mechanical wear,adhesive diffusion wear and chemical wear in the high speed cutting process.The main wear form of the rake face is crater wear,where the adhesion diffuse in the cutting edge and the edges of the crater are more serious than that in the bottom of the crater.WDS inspection on the flank face shows that the adhesion diffuse in the points near the cutting edge are more serious than that in other points in the flank face.

关 键 词：PCBN刀具 磨损机理 高速切削 GCR15钢 

分 类 号：TG74[金属学及工艺—刀具与模具]