摘要
Electrolytic In-process Dressing(ELID)砂轮氧化膜具有辅助抛光性能,对改善磨削表面质量具有极其重要意义。分析了ELID砂轮表面氧化膜界面反应及复合磨粒的形成机理,利用X-射线衍射(μ-XRD)微区分析及电子能谱仪(XPS)对复合磨粒的组成成分、复合区域进行了测试,用扫描电镜(SEM)和透射电镜(TEM)对其形状、粒度、微观结构进行了研究。研究表明,氧化膜中复合磨粒是以磨粒为中心,从中心到边缘的成分依次为α-Fe_(2)O_(3),γ-Fe_(2)O_(3),FeO(OH),Fe(OH)3等氧化物的复合结构。复合磨粒表面形成的氧化膜,呈层层堆积的圆葱状结构,磨削脱水后呈龟背状裂纹。复合磨粒形状为近似长圆形,粒度可达11.5μm到50μm。若干个复合磨粒在氧化膜内连续成网状结构,该网状结构对氧化膜辅助抛光有利,复合磨粒有效去除宽度为磨粒粒度及α-Fe_(2)O_(3)层宽度。
An oxide film with assistive polishing properties is of great importance for improving the quality of grinding in an ELID grinding wheel.The interface reaction of oxide film on the surface of an ELID grinding wheel and the formation mechanism of the composite abrasive particles were analyzed.The com-position regions of the composite abrasive particles were examined using X-ray diffraction micro-zone anal-ysis(μ-XRD)and electron energy spectroscopy(XPS).The shapes,particle sizes,and microstructures were studied using scanning electron microscopy and transmission electron microscopy.The oxide film is centered on the composite abrasive particles,withα-Fe_(2)O_(3),γ-Fe_(2)O_(3),FeO(OH),Fe(OH)3,and other ox-ides extending from the center to the edges.The oxide film that formed on the surface of the composite abrasive grains has a layered onion-like structure and,upon grinding and dehydration,a tortoise-black-like crack.The composite abrasive grains have an elongated-circular shape,with particle sizes ranging from 11.5 to 50μm.Several composite abrasive grains continuously formed a mesh structure in the oxide film.The mesh structure favors auxiliary polishing of the oxide film,and the effective removal width of the com-posite abrasive grains is the size of an abrasive grain plus the width of theα-iron oxide layer.
作者
郐吉才
段云乾
ARDASHEV D V
KUAI Jicai;DUAN Yunqian;ARDASHEV D V(School of Mechanical and Power Engineering,Henan polytechnic University.,Jiaozuo 454000,China;Department of Mechanical Engineering,South Ural state University,Chelyabinsk 454080,Russian Federation)
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2023年第20期2975-2985,共11页
Optics and Precision Engineering
基金
国家自然科学基金资助项目(No.51475147)
河南省攻关项目资助(No.222102520003)
俄罗斯联邦科学与高教部项目资助(No.FENU-2020-0020)。
关键词
ELID磨削
氧化膜
界面反应
复合磨粒
α-Fe_(2)O_(3)
electrolytic in-process dressing grinding
oxide film
interfacial reactions
composite abrasive grain
α-Fe_(2)O_(3)
