冷喷涂中粉末处理及复合技术研究进展

冷喷涂是近年来发展起来的一种固态材料沉积技术，具有沉积温度低、沉积速度大、沉积效率高等特点，在金属材料尤其是温度敏感的金属材料固态喷涂成型方面具有明显优势。冷喷涂中，喷涂粉末的状态（包括形状、尺寸和含氧量等）对整个涂层的影响较大，对冷喷涂粉末进行改性和合理设计显得十分重要。阅读和整理近年来冷喷涂研究领域中喷涂粉末的前处理技术，主要包括粉末预热和热处理以及粉末复合技术，粉末复合技术的主要方法有机械混合法、球磨法、造粒法和包覆法等。总结整理了各种技术的优缺点，可为冷喷涂过程中粉末处理技术的选择提供参考。

Research Progress of Powder Processing and Compositing Technology in Cold Spraying

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.