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Enhancing cutting performance of uncoated cemented carbide tools by joint-use of magnetic nanofluids and micro-texture under magnetic field
Journal of Materials Processing Technology ( IF 6.3 ) Pub Date : 2020-10-01 , DOI: 10.1016/j.jmatprotec.2020.116764
Liang Zhang , Xuhong Guo , Kedong Zhang , Yongqiang Wu , Qiang Huang

Abstract In this study, the coupling effect of magnetic nanofluids and micro-textures under magnetic field on the tribological properties of uncoated tool is revealed for the first time. The micro-scale grooves parallel to the main cutting edge were fabricated on the tool rake face by laser processing (named TP), and for comparison the tools without surface texturing (named NT) were also prepared. Magnetic nanofluids with a solid content of 30% (named MN) were prepared as coolant for machining the workpiece, and the conventional cutting fluids (named CC) were also prepared for a comparison. At the same time, the magnetic nanofluids were applied to the cutting area by a novel machining setup, then the turning tests were accomplished to study the coupling effect of micro-texture and magnetic nanofluids (TP + MN) under different magnetic field strengths. The analysis of obtained results (cutting forces, surface roughness of workpiece after turning and tool wear) proves the advantages of the magnetic nanofluids and micro-texture under the magnetic field. In these experiments, under the highest magnetic field strength (40 kA/m), TP + MN has 48.6% lower cutting force and 49.1% lower surface roughness of machined workpiece compared to that of NT + CC. Additionally, the mechanism for the coupling effect of micro-textured tool and magnetic nanofluids under magnetic field wasalso revealed.

中文翻译:

磁场下磁性纳米流体与微织构联合使用提高无涂层硬质合金刀具的切削性能

摘要 本研究首次揭示了磁场作用下磁性纳米流体与微观纹理对无涂层刀具摩擦学性能的耦合作用。通过激光加工在刀具前刀面上制造平行于主切削刃的微尺度凹槽(命名为 TP),为了比较,还准备了没有表面纹理的刀具(命名为 NT)。制备了固含量为 30% 的磁性纳米流体(命名为 MN)作为加工工件的冷却剂,同时还制备了常规切削液(命名为 CC)以进行比较。同时,磁性纳米流体通过一种新颖的加工装置应用于切割区域,然后进行车削试验,研究了不同磁场强度下微观纹理与磁性纳米流体(TP + MN)的耦合效应。对所得结果(切削力、车削后工件表面粗糙度和刀具磨损)的分析证明了磁性纳米流体和磁场下微纹理的优势。在这些实验中,在最高磁场强度 (40 kA/m) 下,与 NT + CC 相比,TP + MN 的切削力降低了 48.6%,加工工件的表面粗糙度降低了 49.1%。此外,还揭示了微纹理工具与磁性纳米流体在磁场下的耦合作用机制。车削和刀具磨损后工件的表面粗糙度)证明了磁性纳米流体和磁场下微纹理的优势。在这些实验中,在最高磁场强度 (40 kA/m) 下,与 NT + CC 相比,TP + MN 的切削力降低了 48.6%,加工工件的表面粗糙度降低了 49.1%。此外,还揭示了微纹理工具与磁性纳米流体在磁场下的耦合作用机制。车削和刀具磨损后工件的表面粗糙度)证明了磁性纳米流体和磁场下微纹理的优势。在这些实验中,在最高磁场强度 (40 kA/m) 下,与 NT + CC 相比,TP + MN 的切削力降低了 48.6%,加工工件的表面粗糙度降低了 49.1%。此外,还揭示了微纹理工具与磁性纳米流体在磁场下的耦合作用机制。
更新日期:2020-10-01
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