光学精密工程2025，Vol.33Issue(1)：84-95,12.DOI:10.37188/OPE.20253301.0084
镍渣改质及其在磁性复合流体抛光中的应用
Modification of nickel slag and application in magnetic compound fluid polishing
摘要
Abstract
To enhance the reusability of nickel slag,a novel approach is proposed to modify nickel slag and utilize it in the precision polishing of magnetic compound fluids(MCF),leveraging the magnetic ele-ments inherent in nickel slag.This study investigates the relationship between the modified slag content and the polishing performance of MCF.The methodology involves several steps:first,nickel slag is pro-cessed through melting,oxidation,crushing,and magnetic separation to produce modified slag,whose composition and magnetic properties are subsequently analyzed.Next,the influence of MCF containing varying mass fractions of modified slag on surface roughness(Ra)and material removal rate is evaluated by examining the surface morphology of polymethyl methacrylate after polishing.The effect of modified slag on MCF formation is further explored by observing the morphology of MCF magnetic clusters before and after polishing under an external magnetic field.The intrinsic relationship between MCF morphology and polishing forces is analyzed by measuring the polishing forces of different slurries.Finally,the polishing mechanism of MCF containing modified slag is constructed by integrating observations of MCF polishing cluster microstructures,morphology,and polishing force characteristics.The experimental results indi-cate that the saturation magnetization of the modified slag is 5.64 times higher than that of unmodified nick-el slag.As the mass fraction of modified slag increases,the polishing performance of MCF decreases.When the modified slag content reaches 10%,the surface roughness of the workpiece is significantly re-duced from 0.502 μm to 0.010 μm within 10 minutes,corresponding to a surface roughness reduction rate of 97.966%.This reduction rate is only 0.482%lower than that achieved with MCF without modified slag but is 3.603%higher than the rate obtained with 15%modified slag content.In addition,the material removal rate reaches 1.237×10⁸ μm3/min.As the modified slag content increases,the curvature of the chain-like structures formed by magnetic particles during polishing increases,leading to a decrease in pol-ishing force and,consequently,polishing performance.The proposed polishing mechanism reveals that modified slag occupies the middle and rear segments of the magnetic cluster and exhibits strong shear resis-tance.These findings demonstrate that modified nickel slag is suitable for MCF polishing applications,with optimal polishing performance achieved when the modified slag content in the MCF remains below 10%.关键词
磁性复合流体/镍渣/抛光/表面粗糙度Key words
magnetic compound fluids/nickel slag/polishing/surface roughness分类
金属材料引用本文复制引用
王有良,于璞垚,尹新城,张文娟..镍渣改质及其在磁性复合流体抛光中的应用[J].光学精密工程,2025,33(1):84-95,12.基金项目
国家自然科学基金资助项目(No.52265056) （No.52265056）
兰州市青年人才项目(No.2023-QN-38) （No.2023-QN-38）
甘肃省自然科学基金资助项目(No.23JRRA776) （No.23JRRA776）
