The cast aluminum–silicon alloys are used to make various automobile components like pistons, cylinder blocks, piston insert rings, connecting rod, brake disc, etc. but low strength, hardness, and wear resistance restricted their use in several applications. Silicon carbide reinforced aluminum matrix composites exhibit better properties than base metal alloys. As an alloying element, the chromium improves the hardness, strength, and elastic limit of the steel. In this study, the characterization of Al–Si alloy-based metal matrix composites that are reinforced with silicon carbide and chromium is performed with the help of scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction analysis (XRD), microhardness test, tensile test, sliding wear test, scratch test, and porosity analysis. The aluminum matrix composites with a varying weight percent of chromium (0–3 wt.% in steps of 1.5) and a fixed percentage of silicon carbide (10%) were formulated through the vortex casting process. The SEM and EDS images illustrate the occurrence and somewhat uniform dispersion of the reinforcement particulates. In hybrid composites, the Cr₃C₂ compound formation is observed with the least intensity. The reinforcement content contributes significantly to improve the hardness, strength, abrasion resistance, and wear résistance along with a modest reduction in the ductility and gain in friction coefficient. The porosity level obtained in the composites revealed that composites are free from casting defects.

铸造铝硅合金用于制造各种汽车零部件，例如活塞，汽缸体，活塞插入环，连杆，制动盘等，但强度低，硬度高和耐磨性限制了它们在多种应用中的使用。碳化硅增强的铝基复合材料表现出比贱金属合金更好的性能。铬作为合金元素可以改善钢的硬度，强度和弹性极限。在这项研究中，借助扫描电子显微镜（SEM），能量色散谱（EDS），X射线衍射分析（ XRD），显微硬度测试，拉伸测试，滑动磨损测试，划痕测试和孔隙率分析。通过涡流铸造工艺配制了具有不同重量百分比的铬（1.5步为0-3重量％）和固定百分比的碳化硅（10％）的铝基复合材料。SEM和EDS图像说明了增强颗粒的出现和某种程度的均匀分散。在混合复合材料中，Cr观察到最低强度的₃ C ₂化合物形成。增强材料含量显着有助于改善硬度，强度，耐磨性和耐磨性，同时适度降低延展性并增加摩擦系数。在复合物中获得的孔隙率水平表明复合物没有铸造缺陷。