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采用搅拌摩擦工艺合成Cu/B4C表面复合材料,并分析搅拌速度对该复合材料显微组织和滑动磨损行为的影响。搅拌速度以200 r/min从800变化至1200 r/min,横向速度、轴向力、沟槽宽度及搅拌头外形保持不变。采用光学和扫描电子显微镜对所制备表面复合材料的显微组织进行观察。采用销盘滑动磨损试验装置研究该表面复合材料的滑动磨损性能。结果表明:搅拌速度对表面材料的面积和B4C颗粒的分布具有显著影响。在较高的搅拌速度下此复合材料中B4C颗粒分布均匀;而在低搅拌速度下B4C颗粒分布均匀性较差。此外,本文报道搅拌速度对复合材料的颗粒尺寸、硬度、磨损率、磨损表面和磨屑的影响。
The friction stir process was used to synthesize Cu / B4C surface composites, and the effect of stirring speed on the microstructure and sliding wear behavior of the composites was analyzed. The stirring speed was changed from 800 to 1200 r / min at 200 r / min. The lateral speed, axial force, groove width and stir head shape were kept unchanged. The microstructure of the prepared surface composites was observed by optical and scanning electron microscopy. The wear behavior of the surface composites was studied by using the pin sliding wear tester. The results show that the stirring speed has a significant effect on the surface area and the distribution of B4C particles. The B4C particles distribute uniformly in the composite at higher stirring speed, while the B4C particles distribute poorly at low stirring speed. In addition, the paper reports the effect of stirring speed on the particle size, hardness, wear rate, wear surface and wear debris of the composites.