原位TiC颗粒增强铁基复合材料的磨粒磨损性能研究

Research on Abrasive Wear Performance of in-situ TiC Particle Reinforced Ferrous Matrix Composites

采用在普通碳钢的熔炼过程中加入钛的方法制备了不同成分的原位自生TiCp/Fe复合材料,在观察显微组织,测定性能的基础上进行了磨粒磨损特性研究。结果表明,简单的熔铸法可以制备不同体积分数的TiCp/Fe复合材料,材料中TiC以细小的规则多边形状存在。高硬度TiC的形成使得复合材料抗磨粒磨损特性得到提高。复合材料的抗磨粒磨损性能,总体上随TiC颗粒体积分数的增加而提高,在5~35N载荷范围内,载荷越大、TiC含量越高,越表现出优异的耐磨性能。当制备复合材料时添加过量的Ti使基体中Fe3C消失时,材料宏观硬度降低,但复合材料耐磨性仍然得到提高。复合材料的磨损机制以形成犁削和磨沟为主,形成一次磨屑。

In-situ TiC particle reinforced ferrous matrix composites with different Ti contents were fabricated by added Ti metal during melting process of plain carbon steels. Characteristics of abrasive wear were studied on the basis of analysis of microstructure and performance measurements. The result showed that different volume fraction of TiC particle reinforced ferrous matrix composites can be fabricated by using simple melting casting method and the shape of the TiC in the composites shows fine, regular and m...