铸造技术2026，Vol.47Issue(2)：141-152,12.DOI:10.16410/j.issn1000-8365.2026.5260
选区激光熔化成形Cu-Ag-Zr合金致密化行为及其组织性能研究
Research on the Densification Behavior and Microstructural Properties of Cu-Ag-Zr Alloy Fabricated by Selective Laser Melting
摘要
Abstract
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).关键词
Cu-Ag-Zr合金/选区激光熔化/近红外激光/孔隙/微观组织/显微硬度Key words
Cu-Ag-Zr alloy/selective laser melting/near-infrared laser/pores/microstructure/microhardness分类
矿业与冶金引用本文复制引用
杨成淑瑜,梁力文,方世民,汤超越,刘树义,徐佳程,郭岳,姚磊,张浩,郑永健,黄波,邱子翔,王海轩,杨阳,黄其忠..选区激光熔化成形Cu-Ag-Zr合金致密化行为及其组织性能研究[J].铸造技术,2026,47(2):141-152,12.基金项目
重点新材料研发及应用国家科技重大专项(2025ZD0609200) （2025ZD0609200）
中国科学院国际伙伴计划(181GJHZ2023132MI) （181GJHZ2023132MI）
国家重点研发计划(2023YFB4605604) （2023YFB4605604）
浙江省"领雁"项目(2024C01121) （2024C01121）
甬江人才工程科技创新领域青年项目(2021A-112-G,2022A-202-G) （2021A-112-G,2022A-202-G）
"3315计划"C类创新团队(2020A-27-C) （2020A-27-C）
