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首页> 外文期刊>Wear: an International Journal on the Science and Technology of Friction, Lubrication and Wear >Effect of extrusion ratio on wear behaviour of hot extruded Al6061-SiC_p (Ni-P coated) composites
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Effect of extrusion ratio on wear behaviour of hot extruded Al6061-SiC_p (Ni-P coated) composites

机译：挤压比对热挤压Al6061-SiC_p（Ni-P涂层）复合材料磨损性能的影响

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摘要

Metallic coated reinforcements are currently gaining popularity as regards processing of high quality metal matrix composites (MMCs) by liquid metallurgy route. The major reasons being improvement of wettability between reinforcement and molten alloy and to eliminate interfacial reactions. Both these factors lead to inferior mechanical and tribological properties of developed MMCs with non uniform distribution of reinforcement. In the light of the above, the present work focuses on development of Al6061-SiCp (Ni-P coated) composites by stir casting followed by hot extrusion using 200 T hydraulic press at a temperature of 550℃ under different extrusion ratios. Extrusion ratios of 1:4, 1:5, 1:10 and 1:15.5 were adopted. Microstructure studies microhardness, tensile strength tests were conducted on hot extruded composites. Pin-on-disk wear tests were carried out at different loads and sliding velocities for the extruded composites at different extrusion ratios. SEM of worn surfaces was also carried out. As the extrusion ratio increases, microhardness and tensile strength of the composites increased. Further, under all the wear tests conditions studied, the wear resistance of the hot extruded MMCs was superior for the highest extrusion ratio studied.
机译：关于通过液体冶金路线加工高质量金属基复合材料（MMC），金属涂层增强材料目前正在普及。主要原因是提高了增强材料和熔融合金之间的润湿性并消除了界面反应。这两个因素都会导致发达的MMC的力学和摩擦学性能较差，且钢筋分布不均匀。有鉴于此，本工作着重于通过搅拌铸造，然后在550℃的温度下以200 T液压机在不同的挤压比下热挤压Al6061-SiCp（Ni-P涂层）复合材料的开发。挤出比例为1：4、1：5、1：10和1：15.5。在热挤压复合材料上进行了显微组织研究，显微硬度，拉伸强度测试。在不同的挤压比下，对挤压复合材料在不同的载荷和滑动速度下进行销盘磨损试验。还进行了磨损表面的SEM。随着挤出率的增加，复合材料的显微硬度和拉伸强度增加。此外，在所研究的所有磨损测试条件下，热挤压MMC的耐磨性均优于所研究的最高挤压比。

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