| Popis: |
Investigation into the behavior characteristics of particle phases in laser cladding WC-TiC-TaC/Co based ceramic-metal composite coating suggested that TiC particles had exhibited a continuous increase in amount from the bottom to the top of clad layer, and partial TiC particles gathered and became large. Partial WC and TaC particles exhibited smashing phenomenon (heat damage), and the degree of heat damage of both WC and TaC particles was much more serious than that of TiC particles. Experimental results also showed that there existed obviously a surrounding structure (Ti, W, Ta) C at edge of carbonitride phase TiC in clad coating. In addition, ledeburite with shape of fish-bone was generated in the toppest region of clad coating, coarser eutectic microstructures was generated in boding zone of clad coating in the liquid state solidifying process, and both of these microstructures contained W, Ti, Ta etc. elements. |
