| Summary: | Samples of 1Cr12Ni3Mo2V-based composites with different TiC contents (The volume fraction of TiC were 0%, 10%, 20%, 30%, 40%) were prepared based on laser solid forming. Thermodynamic analysis was performed to estimate the possible chemical reactions. Phase analysis and microscopic topography analysis were characterized by optical microscopy (OM), scan electron microscopy (SEM), X-ray diffraction (XRD) and energy dispersive X-ray analysis (EDS). Finally, the formation mechanism of microscopic appearance was analyzed. The results indicate that the TiC particles were successfully dispersed in the matrix. TiC particles mainly exist in two ways in the matrix. The large particles were not completely melted and the small particles were decomposed and then precipitated. Their shape was mainly cross, plum-shaped or dendritic distribution with different TiC contents.
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