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原位自生TiB_2/Al复合材料具有密度小,比强度高,比模量大等特点,在航空航天领域具有广泛的应用前景。为探索原位自生TiB_2/Al复合材料的磨削加工性能,选用单晶刚玉SA砂轮、白刚玉WA砂轮和CBN砂轮在不同磨削参数下对TiB_2/Al复合材料进行磨削试验。首先研究了砂轮材质、转速、工件速度、磨削深度对工件表面粗糙度的影响规律;其次通过对工件表面形貌、磨屑形态、砂轮磨损的观测分析,探索了原位自生TiB_2/Al复合材料磨削表面成形机制;最后基于试验数据,给出了TiB_2/Al复合材料磨削工艺参数优选域。本研究可为颗粒增强金属基复合材料磨削加工提供基础理论支撑。
In-situ TiB 2 / Al composites have many advantages, such as low density, high specific strength and large specific modulus, which have a wide range of applications in the field of aerospace. In order to explore the grinding performance of in-situ TiB 2 / Al composites, the grinding tests of TiB 2 / Al composites were carried out under different grinding parameters by using single-corundum SA grinding wheel, white corundum WA grinding wheel and CBN grinding wheel. Firstly, the influence of grinding wheel material, rotating speed, workpiece speed and grinding depth on the surface roughness of the workpiece is studied. Secondly, by observing and analyzing the surface morphology, wear debris morphology and abrasive wear of the workpiece, the in-situ TiB 2 / Al composite Finally, based on the experimental data, the optimal grinding parameters of TiB_2 / Al composites are given. This study can provide basic theoretical support for the grinding process of particle reinforced metal matrix composites.