摘要
冷喷涂技术因其低温沉积特性,在修复与强化高价值金属零部件的再制造领域应用广泛。然而,冷喷涂所制备的再制造涂层易产生孔隙、微裂纹、结合强度低和较大残余应力等缺陷,进而影响其力学性能及服役可靠性。热处理作为有效的后处理手段,可通过促进原子扩散、位错重组和再结晶过程,显著改善涂层微观结构和综合性能。通过系统综述再制造冷喷涂层后热处理技术的国内外研究进展,重点分析传统热处理(如退火、固溶老化)和新型热处理(如激光重熔、感应重熔、热等静压及微波热处理等)的工艺特点与机理,探讨不同后热处理工艺对涂层组织演变、缺陷愈合和力学性能的影响规律,并总结其在再制造领域中的实际应用现状。研究表明:热处理工艺可有效提升冷喷涂层的致密性、强韧性和抗疲劳性能,为再制造部件的延长使用寿命与性能恢复提供关键技术支撑。
Cold spray technology is widely used in remanufacturing field such as repairing and strengthening highvalue metal parts due to its low-temperature deposition characteristics.However,the remanufacturing coating prepared by cold spray is prone to defects such as pores,microcracks,low bonding strength and high residual stress,which in turn affects its mechanical properties and service reliability.As an effective post-treatment method,heat treatment can significantly improve the microstructure and comprehensive properties of the coating by promoting atomic diffusion,dislocation recombination and recrystallization.In this paper,the research progress of heat treatment technology on remanufacturing cold sprayed coating at home and abroad is systematically reviewed.The process characteristics and mechanism of traditional heat treatment(such as annealing,solid solution aging)and new heat treatment(such as laser remelting,induction remelting,hot isostatic pressing and microwave heat treatment)are emphatically analyzed.The effects of different post-heat treatment processes on microstructure evolution,defect healing,and mechanical properties of coatings are discussed,and their current status of practical application into the remanufacturing field is summarized.The research shows that the heat treatment process can effectively improve the compactness,strength and toughness,and fatigue resistance of the cold sprayed coating,which provides key technical supports for the life extension and performance recovery of the remanufactured parts.
作者
钱正春
纵瑞辰
陈实
张忠源
张恒瑞
王威
徐鸿蒙
成焕波
QIAN Zhengchun;ZONG Ruichen;CHEN Shi;ZHANG Zhongyuan;ZHANG Hengrui;WANG Wei;XU Hongmeng;CHENG Huanbo(School of Mechanical Engineering,Nanjing Institute of Technology,Nanjing 211167,Jiangsu,China;Anhui Key Laboratory of Low Carbon Recycling Technology and Equipment for Mechanical and Electrical Products,Hefei University of Technology,Hefei 230009,Anhui,China;Professional Education and Field Training Base,Army Engineering University of PLA,Xuzhou 221000,Jiangsu,China;Department of Aviation Material Support and Si Zhan Support,Air Force Logistics College,Xuzhou 221005,Jiangsu,China)
基金
江苏省自然科学基金(BK20241964)
中央高校基本科研业务费专项资金(PA2024GDSK0069)
江苏省高校自然科学研究重大项目(25KJA46006)
中国高教学会高等教育科学研究规划课题(23CJRH0303)
江苏省高校“青蓝工程”。
关键词
再制造
冷喷涂
涂层
热处理技术
工程应用
remanufacturing
cold spray
coating
heat treatment technology
engineering application
