TiAlN涂层硬质合金刀具铣削4J32低膨胀合金的磨损机理分析  

Wear Mechanism Analysis of TiAlN Coated Carbide Cutter in Milling of 4J32 Low Expansion Alloy

作　　者：刘胤 王金星 张德玉 杨齐慧 何大伟 王砾晟 Liu Yin;Wang Jinxing;Zhang Deyu;Yang Qihui;He Dawei;Wang Licheng

机构地区：[1]北京自动化控制设备研究所 [2]株洲钻石切削刀具股份有限公司

出　　处：《工具技术》2019年第9期47-50,共4页Tool Engineering

基　　金：国家科技重大专项(2016ZX04002008)

摘　　要：采用国产TiAlN涂层硬质合金刀具,分别以切削速度50.868m/min和99.852m/min对4J32低膨胀合金进行单向顺铣侧铣切削。当材料表面粗糙度接近或达到1.6μm时停止切削,利用扫描电子显微镜和X射线能谱仪观察硬质合金刀具的典型微观形貌,并分析其磨损机理。研究结果表明:TiAlN涂层硬质合金前刀面积屑瘤粘结严重,且伴有局部崩刃现象;当切削速度增大时,积屑瘤表面轮廓粗糙度加剧,局部会出现“花瓣状”和“云层状”切屑粘结物;刀具前刀面的磨损机理主要为扩散磨损、粘结磨损和氧化磨损,并伴有崩刃的破损机理;后刀面发生微量氧化磨损。The domestic TiAlN coated carbide cutter is used to cut the 4J32 low-expansion alloy in one-way milling and side milling process at a cutting speed of 50.868m/min and 99.852m/min.When the surface roughness of the material is close to or reaches 1.6μm,the cutting is stopped.Electron microscope (SEM) and X-ray energy spectrometer (XEDS) scanning are used to observe the typical microstructure of cemented carbide cutter and its wear mechanism is analyzed.The research results show that:TiAlN coated cemented carbide front blade area of the built-up edge is serious adhesion,and accompanied by local chipping edge phenomenon;when the cutting speed increases,the surface roughness of the built-up edge nodules increases;local area will appear “petal” and “cloud” chip bonding material;the wear mechanism of the tool front surface is mainly diffusion wear,bonding wear and oxidation wear and the damage mechanism of the broken edge;micro oxidation wear occurs on the back blade surface.

关 键 词：TIALN涂层 4J32 硬质合金 低膨胀合金 磨损机理 

分 类 号：TG501[金属学及工艺—金属切削加工及机床] TH161[机械工程—机械制造及自动化]