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用熔铸法制备原位自生TiC/Ti6Al4V复合材料,研究Zr元素的添加对TiC/Ti6Al4V复合材料显微组织、压缩性能和耐磨性能的影响。结果表明:当Zr添加量在1%～4%(质量分数,下同)范围内变化时,初生TiC呈枝晶状,在初生TiC周围伴有花瓣状、片状或须状共晶TiC生成;且随着Zr含量的增加,初生TiC的尺寸减小,共晶TiC的数量增加,复合材料的耐磨性能和压缩性能增强。当Zr添加量在6%～10%内时,枝晶状TiC又变得发达,但在此范围内随着Zr含量的增加,复合材料的耐磨性和压缩性能呈下降趋势。当Zr量为4.0%时,复合材料的抗压强度达到峰值。
In-situ TiC / Ti6Al4V composites were prepared by melt casting. The effects of Zr addition on the microstructure, compressive properties and wear resistance of TiC / Ti6Al4V composites were studied. The results show that the primary TiC dendrites when the addition of Zr is in the range of 1% ~ 4% (mass fraction, the same below), accompanied by the formation of petaloid, flaky or whisker eutectic TiC around the primary TiC ; And with the increase of Zr content, the size of primary TiC decreases and the amount of eutectic TiC increases, and the wear resistance and compressibility of the composites increase. Dendritic TiC is well developed when the content of Zr is 6% -10%. However, with the increase of Zr content, the wear resistance and compressive properties of the composites decrease. When the amount of Zr is 4.0%, the compressive strength of the composites reaches the peak value.