PCBN刀具加工TC4钛合金的切削加工性  

Machinability analysis of Ti-6Al-4V alloy with PCBN tools in turning operations

作　　者：刘战强[1] 艾兴[1] 李甜甜[1] 万熠[1] 

机构地区：[1]山东大学机械工程学院,山东济南250061

出　　处：《山东大学学报（工学版）》2009年第1期77-83,共7页Journal of Shandong University（Engineering Science）

基　　金：国家科技支撑计划重点资助项目(2008BAF32B01);国家自然基金科学海外及港澳学者合作研究基金资助项目(50828501);山东省自然科学基金重点资助项目(Z2007F03)

摘　　要：针对聚晶立方氮化硼(polycrystalline cubic boron nitride,PCBN)刀具材料和钛合金Ti-6Al-4V(TC4)工件材料的特点,采用单因素试验法对切削力和已加工表面粗糙度进行研究;通过扫描电子显微镜(scanning electron micro-scope,SEM)观察和能量分散光谱(energy dispersive analysis system,EDS)扫描分析,对PCBN高速切削钛合金TC4时的刀具损坏形态和损坏机理进行研究;采用对角正交回归试验法,求得PCBN刀具切削钛合金时的刀具寿命经验公式,并分析切削用量对刀具寿命的影响.研究表明:PCBN高速切削钛合金时,粘结磨损、扩散磨损和脆性磨损是其主要损坏机理,在高切削速度、低进给量、低切削深度下PCBN刀具加工钛合金时的切削加工性最好,因此PCBN适用于钛合金的精加工.PCBN tools were used for the turning of TC4. The cutting forces and roughness for turned surfaces were measured and analyzed by using single-factor turning experiments. Tool wear was measured under a microscope,SEM and EDS analyses were carried out on the worn tools to determine the tool wear mechanisms. Major tool failure patterns were crater wear,flank wear and notch wear due to adhesive wear,chemical wear and brittle fracture. The diagonal orthogonal regression experimental method was used to investigate...

关 键 词：切削加工性 钛合金 立方氮化硼刀具 

分 类 号：TG501[金属学及工艺—金属切削加工及机床]