碳化硅晶须增强铝基复合材料精密加工表面微观形貌  

Microstructure of the Precision Surface in Machining SiC Whisker Reinforced Aluminum Composite

作　　者：游玲[1] 王大镇[1] 李波[1] 

机构地区：[1]集美大学机械工程学院,厦门361021

出　　处：《组合机床与自动化加工技术》2011年第11期9-13,共5页Modular Machine Tool & Automatic Manufacturing Technique

基　　金：国家863高新技术项目(2006AA050203);福建省自然科学基金计划资助项目(2011J01321)

摘　　要：通过采用聚晶金刚石PCD刀具对SiCw增强铝基复合材料在精密数控车床上进行加工试验,使用扫描电子显微镜SEM、原子力显微镜AFM和Talysurf-6型粗糙度轮廓仪对已加工表面进行微观形貌检测和分析,并采用EDAX能谱仪对已加工表面进行化学成分分析。结果表明:第三切削变形区中SiCw所处的不同位向与不同种类的已加工表面微观形貌形成高度的关联度,SiCw的位向是直接影响已加工表面质量的重要因素之一。在A～E五大类SiCw的位向中,A类(α=0°)位向最易使SiCw以直接切断型变形,产生最好的表面质量。E类(α=±90°,且β=0°或β=180°)位向最易使SiCw以拔出或压碎嵌入型变形,形成最差的表面质量。The tests of SiC whisker reinforced aluminum composite with polycrystalloid diamond PCD tool were conducted in precision CNC lathe,the measurement and analysis of the machined surface with scanning electron microscope（SEM）,atom force microscope（AFM） and Talysurf-6-type roughometer were carried out,and the measurement and analysis of the machined surface chemical composition with EDAX were done.The results show that the different orientation of SiCw in the third cutting deformation region is associated with different types of machined surface microstructure highly,the orientation of SiCw is one of the important factors that affect the machined surface quality directly.In the SiCw orientation of five categories from A to E,the orientation of A（α=0°） easily makes SiCw deform by cutting off directly to produce the best surface quality,the orientation of E（α=±90°,β=0°or β=180°）easily makes SiCw deform by pulling out or pressing in to produce the worst surface quality.

关 键 词：碳化硅晶须 铝基复合材料 精密加工 微观形貌 

分 类 号：TH161.1[机械工程—机械制造及自动化] TB331[一般工业技术—材料科学与工程]