由于剧烈加工硬化和界面非冶金结合，冷喷涂增材制造技术制备的金属构件往往呈现低塑性的力学特征，限制了进一步推广应用。申请人前期冷喷涂纯铜研究中，通过沉积过程中动态再结晶与加工硬化过程的协同调控成功获得了兼具高强度（270MPa）、高塑性（30%）和高电导率（90%IACS）的优异综合性能。因此，本项目拟选用力学及导电性能优异的CuCrZr合金为研究对象，采用单个粒子至沉积体的系统性数值模拟和实验研究，揭示冷喷涂沉积过程中冶金结合形成机理，探明剧烈塑性变形、界面绝热升温、动态再结晶等特征的协同调控对于颗粒界面结合和沉积体微观结构特征（晶粒细化、位错增殖、第二相原位析出）的影响机制，为调控其强塑性和导电性能提供理论依据；进而厘清冷喷涂CuCrZr合金高强韧性调控机制和沉积机理的关键科学问题，最终建立“沉积条件-微观组织-综合性能”之间的关系模型，为高强韧高导电铜合金的增材制造提供理论依据。

Due to the combination of strict work hardening and non-metallurgical interfaces, metal parts prepared by cold spray additive manufacturing technology generally exhibit low plastic mechanical properties, which limits their further applications. In the previous work on pure copper, the applicant successfully obtained excellent comprehensive performance of high strength (270 MPa), high plasticity (30%) and high electrical conductivity (90% IACS) through the control over dynamic-recrystallization and work-hardening. Therefore, this project intends to select CuCrZr alloy with excellent mechanical and electrical properties as the research object, and use systematic numerical simulation and experimental research of single particle deposits to reveal the metallurgical bond formation mechanism during cold spray deposition and conduct research. It will clarify the severe plastic deformation, adiabatic heating of the interface, dynamic recrystallization and other characteristics affecting the particle interface bonding and deposition microstructure characteristics (grain refinement, dislocation diffusion, second phase in situ precipitation), which can provide the theoretical basis for adjustment of its strong plasticity and electrical properties. It will further clarify the key scientific issues of the high strength and toughness control mechanism and deposition mechanism of cold-sprayed CuCrZr alloy, and finally establishes a relationship model between "deposition conditions-microstructure-comprehensive properties" for additive manufacturing of high-strength alloys and provides theoretical basis.