磨料、磁极结构对TC4钛合金杆件磁力研磨精度及效率的影响  

Abrasive and Magnetic Pole Structure on Magnetic Finishing Accuracy and Efficiency of TC4 Titanium Alloy Rods

作　　者：王玉 李文生[1] 成波[1] 张辛健 何琪功 乔健 Wang Yu;Li Wensheng;Cheng Bo;Zhang Xinjian;He Qigong;Qiao Jian(College of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Lanzhou Lanshi Energy Equipment Engineering Research Institute Limited Company,Lanzhou 730050,China)

机构地区：[1]兰州理工大学材料科学与工程学院,甘肃兰州730050 [2]兰州兰石能源装备工程研究院有限公司,甘肃兰州730050

出　　处：《稀有金属》2025年第1期29-40,共12页Chinese Journal of Rare Metals

基　　金：国家重点研发计划项目(2022YFE0121900);甘肃省科技重大项目(21ZD4WA017);甘肃省教育厅产业转化项目(17JR7WA017);国家国合基地基金项目(2017D01003);“111”计划项目(D21032);甘肃省青年科技基金计划项目(20JR10RA196)资助。

摘　　要：为解决轴杆件磁力研磨过程中由磁感应强度与磁场梯度不匹配导致表面研磨不均匀与表面粗糙度改善率低的问题,本文通过ANSYS Maxwell 16.0软件模拟优化双圆盘磁极的结构排布、数量、尺寸、转向对磁感应强度及磁场梯度等关键因素的影响,实现磁感应强度增强及磁场梯度变化的目标,采用冷压烧结成功制备80,150和250μm不同粒度等级铁基SiC磨料,使用优化设计后双圆盘磁极装置对TC4钛合金杆件表面进行研磨试验,并讨论分析了磁极不同转向及转速、磨料粒径及添加量对TC4钛合金杆件表面质量的影响。结果表明,16磁极、内径126 mm-外径156 mm、 NS-SN排布方式的双圆盘磁极同向旋转时,磁感应强度可达0.63~1.18 T,磁感积分增量为24.515 T·mm,具有最佳的磁感应强度与磁场分布;磁极同向旋转、转速为800 r·min^(-1),磁性磨料粒径为150μm,磨料添加量为96 g时,加工4道次后TC4钛合金杆件表面粗糙度由0.965μm降低至0.354μm,150μm级磨料可实现最佳研磨精度与效率,加工表面粗糙度改善率达63.32%。双圆盘磁极的高磁感应强度和磁场梯度有利于磨料流动更新,表面粗糙度改善率高,表面纹理致密、无缺陷。TC4 titanium alloy is known for its good corrosion resistance,high hardness,excellent biocompatibility and high specific strength,which has been widely used in aerospace,shipping and medical fields.High quality surfaces of key components are always closely related to its service safety and stability.Magnetic abrasive finishing(MAF) is a new type of high-precision processing technology.A flexible "magnetic brush" formed by magnetic abrasives driven by magnetic field,and contact and move relatively to the surface of workpiece.Surface defects can be removed and the surface quality(roughness) is then effectively improved.Compared with the traditional grinding,honing and abrasive belt polishing methods,MAF has advantages of good adaptability,flexibility,high efficiency and high precision,and can be applied for plane,inner and outer surfaces of component,and other complex curved surface.In the process of magnetic finishing,a magnetic field generated by magnetic poles to provide finishing pressure,which is beneficial for finishing precision and efficiency.The results show that the finishing pressure is the key factor affecting the quality and efficiency.The magnetic induction intensity and magnetic field distribution have a direct effect on finishing pressure.The arrangement,quantity and size of magnetic poles are the key factors that affect the magnitude of magnetic field force,the distribution of magnetic field lines,then affect the magnitude and direction of finishing pressure in MAF system as well as the final surface quality and efficiency.The design of magnetic poles must also give consideration to the gradient of magnetic induction intensity.The arrangement of magnetic poles is the key factor that determines the finishing pressure during magnetic finishing.In this paper,the problem of uneven finishing surface and low improvement rate of surface roughness caused by mismatch of magnetic field gradient and magnetic induction intensity in magnetic finishing of slender sharp rodswas verified.A double-disc multi-pole m

关 键 词：磁力研磨 双圆盘磁极 磁感应强度 研磨效率 粗糙度 

分 类 号：TG176[金属学及工艺—金属表面处理]