Ultrasonic vibration assisted laser cladding processing was employed to fabricate ceramic particles reinforced Fe-based composite coatings. The influence of the ultrasonic vibration on the dilution, profile appearance, microstructure characteristics, and high temperature oxidation resistance of the composite coatings were investigated. Experimental results revealed that the profile roughness of the coatings was reduced by ultrasonic vibration during laser cladding processing, but the dilution of the coating was slightly increased. The heat and mass transfer in laser molten pool was improved by the ultrasonic vibration, resulting in the refining of the microstructure and increasing the amount of ceramics, as well as homogenizing the distribution of ceramics. The composite coating produced by 300 W ultrasonic vibration assisted laser cladding processing not only possessed good wear resistance, but also had high oxidation resistance. However, excessive ultrasonic vibration power increased the tendency of cracks in the coating.

超声振动辅助激光熔覆工艺用于制造陶瓷颗粒增强的铁基复合涂层。研究了超声振动对复合涂层的稀释度，外形，结构特征和高温抗氧化性能的影响。实验结果表明，在激光熔覆过程中，超声振动降低了涂层的轮廓粗糙度，但涂层的稀释度却有所增加。超声波振动改善了激光熔池中的传热和传质，从而改善了微结构，增加了陶瓷的数量，并使陶瓷的分布均匀。通过300W超声振动辅助激光熔覆工艺制备的复合涂层不仅具有良好的耐磨性，而且具有较高的抗氧化性。但是，过量的超声振动功率增加了涂层破裂的趋势。