中国机械工程2025，Vol.36Issue(5)：963-973,11.DOI:10.3969/j.issn.1004-132X.2025.05.008
金刚石切削单晶镍纳米表面生成机理研究
Research on Mechanism of Nano-surface Generation in Diamond Cutting Single-crystal Nickels
摘要
Abstract
To study the surface generation mechanism of single-crystal nickel ultra-precision ma-chining,a molecular dynamics simulation model of diamond cutting single-crystal nickel was estab-lished,and the influences of different parameters on single-crystal nickel nano machining were ob-tained through the analysis of the results.Then,the diamond cutting experiments were carried out on single-crystal nickels,and white light interferometer and scanning electron microscope were used to characterize the cutting surfaces and chip morphologies.The cutting parameters of single crystal nick-els were optimized from both of theoretical and experimental.The results show that the cutting depth is positively related to the surface quality of single-crystal nickels in a certain range.The negative rake of the tool is conducive to the improvement of the surface quality,but it may bring burrs.Single-crystal nickels are not amorphous during diamond cutting processes.The type of dislocations is dominated by Shockley dislocations,and a small amount of Hirth,Stair-rod and Frank dislocations coexist.The[(1-)1 0]crystal direction of the(1 1 0)crystal plane has the smallest subsurface damage,which is the best crystal direction.The study may provide certain references for optimizing the ultra-precision machining technology and improving the machining accuracy of single-crystal nickels.关键词
金刚石切削/单晶镍/分子动力学仿真/表面生成机理Key words
diamond cutting/single crystal nickel/molecular dynamics simulation/surface gener-ation mechanism分类
机械工程引用本文复制引用
郑江锋,张国庆,韩俊鸿,赖志慧..金刚石切削单晶镍纳米表面生成机理研究[J].中国机械工程,2025,36(5):963-973,11.基金项目
国家自然科学基金(52275454,U2013603) （52275454,U2013603）
深圳市自然科学基金(JCYJ20220531103614032,JCYJ20220818102409021) （JCYJ20220531103614032,JCYJ20220818102409021）
