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.
出处
《机械工程材料》
CAS
CSCD
北大核心
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)
