冷喷涂中粉末处理及复合技术研究进展

As a solid material deposition technology, cold spraying has developed rapidly. Because of its low deposition temperature, high deposition velocity and deposition efficiency, it has obvious advantages in solid forming of metal materials, especially temperature-sensitive metal materials. In cold spraying, the nature of the sprayed powder including size, morphology and oxygen content has significant impact on the coating. Therefore, it is very important to modify and design the cold spray powder. The pretreatment and composite technology of sprayed powder in research of cold spraying are summarized, mainly including powder preheating, heat treatment, and powder composite technology, which includes mechanical mixing, ball milling, granulation and coating method, etc., advantages and disadvantages of various technologies are illustrated. The paper provides a reference for the choice of powder processing technology in cold spraying.