利用激光增材制造技术制备了MC碳化物增强Inconel625复合材料,研究了TiC添加量对复合材料显微组织、显微硬度和摩擦磨损性能的影响。结果表明,添加TiC的复合材料的显微组织由枝晶状γ基体与枝晶间呈弥散分布的增强体组成。随着TiC添加量的增大,复合材料中一次枝晶间距逐渐减小,而枝晶间碳化物含量和显微硬度逐渐增大,抗磨损性能比Inconel625合金提高80%以上。当TiC的质量分数为1%时,复合材料的屈服强度和抗拉强度比Inconel625合金分别提高了21.9%和27.5%,但延伸率减小。

The MC carbide reinforced Inconel625 composites are prepared by the laser additive manufacturing technology, and the effects of TiC addition mass on the microstructures, micro-hardness and wear properties of the composites are investigated. The results show that the microstructure of composite with the addition of TiC is composed of dendritic γ matrix and interdendritic reinforcements with a dispersive distribution. With the increase of TiC addition, the primary dendritic spacing of the composites decreases, while the content of MC carbide as well as the micro-hardness increases gradually. The wear resistance properties of all the composites are improved by over 80%. When the TiC has a mass fraction of 1%, the yield strength and tensile strength of the composites are increased by 21.9% and 27.5%, respectively, but their elongation is reduced.