丝粉同步激光沉积制备WC_p/Al复合材料构件工艺

The well-formed monolayer and laminated WC_p/Al composites were fabricated by coincident wire-powder laser deposition. The ideal macroscopic shape of single layer deposition was obtained through parameters optimized. The results show that the uniformity of the WC particles distribution can be improved by changing the size of the beam gas, and reducing the laser power can reduce the detrimental effects of the heat accumulation on the multilayer deposition. However, there is a critical value in the reduction of laser power. The metallurgical quality of the deposit is good and the regional microstructure is uniform. The existence of WC and Ti will inhibit the growth of columnar crystals, and the grain size can be refined. With the increase of the number of sedimentary layers, the heat accumulation effect is gradually strengthened. The size of the dendritic will gradually increase.