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首页> 外文会议>Sixth International Conference on Progress of Machining Technology: With Some Topics in Advanced Manufacturing Technology (ICPMT'2002); Sep 10-14, 2002; Xi'an, China >ORTHOGONAL CUTTING IN SEM AT ELEVATED TEMPERATURE OF ALUMINUM MATRIX COMPOSITES
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ORTHOGONAL CUTTING IN SEM AT ELEVATED TEMPERATURE OF ALUMINUM MATRIX COMPOSITES

机译：铝基复合材料升高温度下SEM的正交切割

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摘要

Aluminum matrix composites are used for precision parts of aircrafts and automobiles, because they have high strength at about 573K and wear resistance. On the other hand, it is known that severe tool wear is observed and it is difficult to get fine surface in cutting. However, there are few reports for cutting behaviors at elevated temperature. So, the orthogonal cutting in SEM was carried out at elevated temperature up to 573K to observe the cutting phenomena and the behavior of the secondary phases contained in their workpieces in detail. The main results obtained are as follows: (1) In cutting SiC fiber reinforced 6061 aluminum alloy and aluminum alloy containing 20wt% silicon, the cut surface became rough as the rise of the workpiece temperature. The in-situ observations showed that SiC fibers and silicon particles were broken very hard in front of the cutting edge at 473K and 573K, and the forward and downward damage from the cutting edge was widely. (2) In cutting rapidly-solidified aluminum alloy, the surface roughness was small up to 473K. Shear type chips were formed and the cutting was smooth up to 573K.
机译：铝基复合材料可用于飞机和汽车的精密零件，因为它们在573K左右具有很高的强度，并且具有耐磨性。另一方面，已知观察到严重的工具磨损，并且在切削中难以获得精细的表面。但是，很少有关于高温下切削行为的报道。因此，在高达573K的高温下，在SEM中进​​行正交切割，以详细观察其工件中包含的切割现象和第二相的行为。获得的主要结果如下：（1）在切割SiC纤维增强的6061铝合金和含20wt％硅的铝合金时，随着工件温度的升高，切割表面变得粗糙。现场观察表明，SiC纤维和硅颗粒在473K和573K处的切削刃前部非常坚硬地断裂，并且切削刃的正向和向下损伤范围很大。 （2）在切削快速凝固的铝合金时，表面粗糙度小至473K。形成了剪切型切屑，切削平滑至573K。

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