随着工业快速发展，选区激光熔化(selective laser melting, SLM)成为航空、航天、军工等领域高强高导铜合金复杂零部件成形的重要技术手段。 针对高导热/高光反射性 Cu-Ag-Zr 合金难以实现 SLM 高致密成形的加工难题，本文通过正交实验优化工艺参数，结合重熔工艺实现了合金高致密成形。 系统分析了激光功率、扫描速度及扫描间距对Cu-Ag-Zr 粉末 SLM 成形致密化行为、微观组织、硬度和热导率的影响。 在特定粉末粒径(20~53 μm)、重熔工艺以及激光功率为 420~500 W，体积能量密度约为 300 J/mm3 的 SLM 参数组合下，充足的激光能量输入显著改善了微观熔池分布，有效减少了未熔合孔隙，同时 SLM 过程特有的快速凝固使合金元素均匀分布，可制备出相对密度达 99.87%的合金块体，其打印面存在 <001>//BD 织构。 优化制备的 Cu-Ag-Zr 合金显微硬度达 122.6 HV0.5，热导率达 252 W/(m·K)。

With rapid industrial development, selective laser melting (SLM) has emerged as a critical manufacturing technique for forming complex components made of high-strength, high-thermal-conductivity copper alloys in the aerospace, aviation, and defense sectors. To address the processing challenge of achieving high-density SLM for highly thermally conductive/highly light-reflective Cu-Ag-Zr alloys, orthogonal experiments were employed to optimize the process parameters and combine remelting techniques to realize high-density alloy formation. The effects of the laser power, scanning speed, and hatch spacing on the densification behavior, microstructure, hardness, and thermal conductivity of the SLM-processed Cu-Ag-Zr powder were systematically investigated. Under a specific powder size range (20~53 μm), with remelting applied, and within a laser power range of 420~500 W and a volumetric energy density of approximately 300 J/mm3,sufficient laser energy input significantly improves the distribution of melt pools and effectively reduces the lack of fusion pores. Moreover, the characteristic rapid solidification of SLM promotes a uniform distribution of alloying elements, resulting in a relatively dense bulk alloy with a relative density of 99.87%. A pronounced <001>//BD texture is observed on the printed surface. The optimized Cu-Ag-Zr alloy has a microhardness of 122.6 HV0.5 and a thermal conductivity of 252 W/(m·K).