Surface integrity analysis when milling ultrafine-grained steels

Surface integrity analysis when milling ultrafine-grained steels
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铣削超细晶粒钢时的表面完整性分析

DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
Otavio Villar da Silva Neto
Otavio Villar da Silva Neto
中科院分区：
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文献类型：
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作者：
A. Rodrigues;O. Balancin;J. Gallego;C. Assis;Hidekasu Matsumoto;Fernando Brandão de Oliveira;Suzana Regina da Silva Moreira;Otavio Villar da Silva Neto

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本文量化了铣削条件对超细晶粒钢表面完整性的影响。切削速度、进给量和切削深度与被加工表面下工件的显微硬度和显微组织有关。在CNC加工中心中，使用向下铣削和干燥条件对具有10.8 μm（原样）和1.7 μm（超细）晶粒尺寸的低碳合金钢进行端铣。结果表明，超细晶工件保持其表面完整性对切削参数比原材料。切削速度提高了显微硬度，而切削深度加深了原始材料的硬化层。此外，在工件亚表面观察到随进给速度方向的组织变形。
This paper quantifies the effects of milling conditions on surface integrity of ultrafine-grained steels. Cutting speed, feed rate and depth of cut were related to microhardness and microstructure of the workpiece beneath machined surface. Low-carbon alloyed steel with 10.8 µm (as-received) and 1.7 µm (ultrafine) grain sizes were end milled using the down-milling and dry condition in a CNC machining center. The results show ultrafine-grained workpiece preserves its surface integrity against cutting parameters more than the as-received material. Cutting speed increases the microhardness while depth of cut deepens the hardened layer of the as-received material. Also, deformations of microstructure following feed rate direction were observed in workpiece subsurface.