The selective laser melting (SLM) process of the Cu-10Sn alloy and effects of heat treatment were examined in this study. The Taguchi test and Box–Behnken design were performed to determine the laser power (LP), scanning speed (SS), and hatch space (HS). The best process parameters were selected using the highest density: the optimum HS was 160 μm; SS was 278 mm s⁻¹; LP was 192 W; and density reached 98.76%. The tensile strength, elongation, Vickers hardness, and impact toughness of the Cu-10Sn alloy formed by SLM are 435 MPa, 13%, 122HV1, and 10 J·cm⁻², respectively. Heat treatment can significantly increase the ductility and impact toughness of the Cu-10Sn alloy, but at the same time, it can reduce its strength. The strength of parts obtained by all five heat treatment methods is much greater than that of castings. Parts that are annealed at 600°C for 4 h have the best mechanical properties, its tensile strength and elongation were 378 MPa and 15%, respectively.

中文翻译：

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选区激光熔化结合热处理形成Cu-10Sn的工艺及性能

本研究考察了 Cu-10Sn 合金的选择性激光熔化 (SLM) 工艺和热处理效果。执行田口测试和 Box-Behnken 设计以确定激光功率 (LP)、扫描速度 (SS) 和孵化空间 (HS)。使用最高密度选择最佳工艺参数：最佳 HS 为 160 μm；SS 为 278 mm s ^-1；LP 为 192 W；密度达到98.76%。SLM形成的Cu-10Sn合金的抗拉强度、延伸率、维氏硬度和冲击韧性分别为435 MPa、13%、122HV1和10 J·cm ^-2， 分别。热处理可以显着提高Cu-10Sn合金的塑性和冲击韧性，但同时会降低其强度。这五种热处理方法得到的零件的强度都远大于铸件。600℃退火4h的零件力学性能最好，其抗拉强度和伸长率分别为378 MPa和15%。