Complex CuCrZr alloy parts with well-matched conductivity and strength can be prepared by adjusting the process parameters of selective laser melting (SLM). Thus, in this study, SLM was used to prepare CuCrZr alloys, and their structure, electrical conductivity, and mechanical properties were analyzed. Moreover, effect of aging treatment on the alloy structure was investigated. With the laser power of 400 W, scanning speed of 300 mm/s, and scanning distance of 80 μm, an CuCrZr alloy sample with a maximum relative density of 99.15% and elongation of 71.7% was obtained by SLM. After direct age hardening (DAH) at 480 °C for 2 h, the conductivity and strength of the alloy increased significantly. In particular, the conductivity increased from 22.16%IACS to 72.8%IACS, indicating an overall increase of 228.5%. Meanwhile, the strength increased from 265.5 to 612.0 MPa. From the backscatter diffraction analysis, the small-angle grain boundaries increased after aging, and the crystal orientation changed from <101> to <111>. During direct aging, a large amount of nanoscale Cr phase was precipitated from the supersaturated solid solution, which increased the strength of the alloy. Further, precipitation strengthening was determined to be the main alloy strengthening mechanism. Moreover, the reduction in the solid solution content reduced the electron scattering effect and increased the overall conductivity of the alloy.

通过调整选择性激光熔化（SLM）的工艺参数，可以制备出导电率和强度匹配良好的复杂CuCrZr合金零件。因此，本研究采用 SLM 制备 CuCrZr 合金，并对其结构、电导率和力学性能进行了分析。此外，研究了时效处理对合金组织的影响。在激光功率为400 W、扫描速度为300 mm/s、扫描距离为80 μm的条件下，通过SLM获得了最大相对密度为99.15%、延伸率为71.7%的CuCrZr合金样品。在 480°C 直接时效硬化 (DAH) 2 h 后，合金的电导率和强度显着提高。特别是电导率从 22.16%IACS 增加到 72.8%IACS，表明总体增加了 228.5%。同时，强度从265增加。5 至 612.0 兆帕。背散射衍射分析表明，时效后小角晶界增加，晶体取向由<101>变为<111>。在直接时效过程中，过饱和固溶体中析出大量纳米级Cr相，提高了合金的强度。此外，沉淀强化被确定为主要的合金强化机制。此外，固溶体含量的降低降低了电子散射效应，提高了合金的整体导电率。过饱和固溶体析出大量纳米级Cr相，提高了合金的强度。此外，沉淀强化被确定为主要的合金强化机制。此外，固溶体含量的降低降低了电子散射效应，提高了合金的整体导电率。过饱和固溶体析出大量纳米级Cr相，提高了合金的强度。此外，沉淀强化被确定为主要的合金强化机制。此外，固溶体含量的降低降低了电子散射效应，提高了合金的整体导电率。