磁力研磨调质45钢的工艺参数和表面形貌研究  

Study on Processing Parameters and Surface Morphology of Quenched and Tempered 45 Steel in Magnetic Abrasive Finishing

作　　者：叶恒宇[1] 覃寿同[1] 王栋[1] 张焕可 

机构地区：[1]郑州大学机械工程学院,郑州450000

出　　处：《机械科学与技术》2017年第8期1292-1297,共6页Mechanical Science and Technology for Aerospace Engineering

基　　金：2014年国家工业和信息化部工业转型升级强基工程项目资助

摘　　要：开展磁力研磨加工方法对调质45钢的加工能力以及最优工艺参数的研究。实验采用SiC磨料和铸钢粉的混合物作为磁性磨料,钕铁硼永磁铁做磁极,利用正交试验方法从研磨液类型、磨料粒度、磨料比重、加工间隙和磁场强度5个因素分别4个水平进行实验设计,通过比较加工前后工件被加工区域表面粗糙度改善率(%ΔRa)进行磁力研磨工艺参数的优化。实验结果表明,磁力研磨加工调质45钢的优化后工艺参数为:油酸研磨液、360# SiC磨料、磨料比重30%、加工间隙1 mm、0.359~0.133T(?30 mm×20 mm永磁铁);经磁力研磨光整加工后,工件表面粗糙度由初始的1.941μm降至1.053μm;磁力研磨加工后工件表面的加工纹理得到有效降低。In this paper, the processing ability and optimal processing parameters of quenched and tempered 45 steel in magnetic abrasive finishing （MAF） are studied. In this experiment, magnetic abrasive is mixed by using SiC abrasive and cast steel particles, magnetic pole was made by using Nb2Fe14B permanent magnet, and orthogonal experiment method was used to design four levels of each five factors, the type of the grinding fluid, abrasive mesh size, percentage weight of abrasive, working gap and magnetic field strength in the MAF process were optimized by comparing the change ratio in surface roughness before and after magnetic abrasive finishing. The results show that, the optimal processing parameters in theMAF process of quenched and tempered 45 steel were of：oleic acid as grinding fluid, 360# SiC abrasive, 30% abrasive weight percentage, 1 mm working gag and 0.359-0.133 T Magnetic field intensity （permanent magnet of Ф30 mm×20 mm）; the surface roughness of the workpiece decreased from 1.941 μm before MAF to 1.053 μm after MAF; the surface texture of workpiece after MAF was eliminated.

关 键 词：磁力研磨 正交试验 工艺参数 表面形貌 加工纹理 

分 类 号：TG14[一般工业技术—材料科学与工程]