【摘要】 C19400合金凭借优异的力学性能、导电性能及低成本优势，成为当前用量最大的引线框架材料，广泛应用于电子信息、电气控制、电力传输及轨道交通等领域。结合C19400合金的成分、微观组织结构与强化机制，综述了其在半连续铸造、均匀化热处理、热轧、固溶、冷轧、时效及去应力退火等工艺处理下，微观组织演变与宏观性能的构效关系。上述每一项工艺均会对合金的微观组织结构与性能产生显著影响，因此，在生产过程中需对工艺参数进行严格把控。总结了C19400合金的研究现状，旨在为新型合金设计及工艺优化提供理论指导，进而推动高性能新型合金的研发进程，并实现传统合金材料综合性能的显著提升。更多还原

【Abstract】 C19400 alloy has become the most widely used lead frame material due to its excellent mechanical properties, high electrical conductivity, and low-cost advantage, which is extensively applied in electronic information, electrical control, power transmission, and rail transit fields. Based on the chemical composition, microstructure, and strengthening mechanisms of C19400 alloy, this study systematically reviews the structure-property relationship between microstructural evolution and macroscopic properties under various processing technologies, including semi-continuous casting,homogenization heat treatment, hot rolling, solution treatment, cold rolling, aging, and stress relief annealing. Each of these processing steps exerts a significant impact on the alloy’s microstructure and properties, thus requiring strict control of process parameters during production. The current research status of C19400 alloy is summarized, aiming to provide theoretical guidance for the design of new alloys and process optimization, thereby promoting the research and development of high-performance new alloys and significantly improving the comprehensive properties of traditional alloy materials.更多还原