碳化硅增强颗粒含量和尺寸对铝基复合材料超精密车削表面的影响  

Influence of Fraction and Size of SiC Reinforcement Particles on Ultra-precision Turning Surfaces of Aluminum Matrix Composites

作　　者：葛英飞[1] 徐九华[1] 杨辉[2] 罗松保[2] 傅玉灿[1] 

机构地区：[1]南京航空航天大学机电工程学院,江苏南京210016 [2]北京航空精密机械研究所,北京100076

出　　处：《机械工程材料》2007年第6期12-14,18,共4页Materials For Mechanical Engineering

基　　金：国防科技重点实验室基金(51464010604HK1301)

摘　　要：用聚晶金刚石刀具(PCD)研究了增强颗粒的含量、尺寸等对SiC颗粒增强铝基复合材料超精密车削表面的影响。结果表明:SiC增强颗粒的去除方式主要有拔出、破碎和切断等,SiC颗粒的含量和平均尺寸越大,其拔出和破碎现象就越多,复合材料获得的加工表面粗糙度值也越大;当SiC颗粒主要以切断方式被去除时,可望获得含有较少坑洞和裂纹等加工缺陷的超精密切削表面。A polycrystalline diamond tool was selected to investigate the influence of fraction and size of reinforcements on the machined surface of SiC-particle-reinforced aluminum matrix composites. There are three removing mechanisms, i.e. pulling out, crushing and cutting off during turning this kind of material When the composite have a higher volume/weight fraction and bigger mean size of SiC particulate reinforcement, the number of particles that were pulled out or crushed is bigger too. This resultes in a high value of the machined surface roughness. A better ultra-precision turning surface that have fewer pits and cracks could be expected when SiCp was removed mainly in the mode of cutting off mechanism.

关 键 词：SICP/AL复合材料 超精密车削 表面粗糙度 

分 类 号：TG506.7[金属学及工艺—金属切削加工及机床]