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首页> 外文会议>Researches in Powder Metallurgy >Evaluation of Surface Integrity during Machining With Different Tool Grades of SiCp/Al-Si Composites Produced By Powder Metallurgy
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Evaluation of Surface Integrity during Machining With Different Tool Grades of SiCp/Al-Si Composites Produced By Powder Metallurgy

机译：用粉末冶金法生产的不同工具等级的SiCp / Al-Si复合材料加工时的表面完整性评估

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摘要

MMCs components are mostly produced using near net shape manufacturing methods and are subsequently machined to the final dimensions and surface finishes. The MMCs consist of extremely hard reinforcing particles and pose considerable challenges due to the poor machinability and severe wear of the cutting tool. In this study, cutting performance of WC, CBN and PCD cutting tools were investigated with respect to surface roughness during machining of 10 wt % SiCp reinforced Al-Si alloy matrix composites produced by powder metallurgy (PM) method. Average surface roughness (Ra) corresponding to each machining condition was measured. After the machining process the worn insert tips were examined under the scanning electron microscope (SEM). Chip geometry and machined surface photographs have been taken by optical microscopy. The experimental results showed that surface roughness decreased with increasing cutting speed for all of cutting tool materials. The best surface integrity was occurred after the machining with PCD insert at the highest cutting speed employed.
机译：MMC组件大部分使用近净形状的制造方法生产，然后加工成最终尺寸和表面光洁度。 MMC由极硬的增强颗粒组成，由于切削性差且切削工具磨损严重，因此带来了相当大的挑战。在这项研究中，研究了WC，CBN和PCD切削刀具的切削性能，这些切削刀具是通过粉末冶金（PM）方法生产的10 wt％SiCp增强的Al-Si合金基复合材料加工过程中相对于表面粗糙度的。测量对应于每种加工条件的平均表面粗糙度（Ra）。加工后，在扫描电子显微镜（SEM）下检查磨损的刀片尖端。芯片的几何形状和加工的表面照片已通过光学显微镜拍摄。实验结果表明，所有切削刀具材料的表面粗糙度均随着切削速度的增加而降低。用PCD刀片以最高切削速度加工后，可获得最佳的表面完整性。

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