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利用Cr3 C2 和TiC生成自由能和稳定性的差异 ,通过激光熔化法在Ti6Al4V表面制备TiC颗粒增强钛基复合材料涂层。结果表明 :选择合适的激光处理工艺 ,可使Cr3 C2 和Ti合金粉末通过原位结晶置换反应生成TiC/Ti复合材料熔覆层 ;亚微米级的TiC颗粒均匀地分布于复合材料的基体中 ,复合材料的基体组织随合金粉末的成分不同而改变。
Based on the difference of free energy and stability of Cr3 C2 and TiC, the TiC particles reinforced Ti matrix composite coating was prepared on the surface of Ti6Al4V by laser melting method. The results show that TiC / Ti composite cladding layer can be formed by the in-situ crystal substitution reaction of Cr3 C2 and Ti alloy powders by choosing appropriate laser treatment process. Submicron TiC particles are uniformly distributed in the matrix of the composite material, The matrix of the composite changes with the composition of the alloy powder.