中国激光, 2018, 45 (10): 1002009, 网络出版: 2018-10-12   

激光选区熔化水雾化Cu-10Sn合金粉末成形件的微观组织结构及力学性能研究 下载: 763次

Microstructure and Mechanical Properties of Water Atomized Cu-10Sn Alloy Powder Formed Parts by Selective Laser Melting
作者单位
1 北京工业大学激光工程研究院, 北京 100124
2 全球能源互联网研究院有限公司, 北京 102200
3 北京工业大学材料科学与工程学院, 北京 100124
摘要
为降低3D打印铜合金的生产成本, 采用水雾化法制备的Cu-10Sn合金粉末作为原材料,进行激光选区熔化(SLM)试验。通过优化打印工艺参数获得几乎全致密的Cu-10Sn合金块体, 其相对密度达99.7%。制备的Cu-10Sn合金主要由金属间化合物Cu41Sn11及α-Cu固溶体两相组成, 其晶粒形态主要为沿凝固方向形成的柱状树枝晶和枝晶间相, 并且在晶内分布有高密度位错。在准静态拉伸条件下, 其屈服强度为(392±6) MPa, 抗拉强度为(749±5) MPa, 塑性变形量为29%±2.3%, 综合力学性能远高于铸态 Cu-10Sn合金。
Abstract
In order to reduce the production cost of copper alloy 3D printing, we use the Cu-10Sn alloy powder prepared by water atomization as raw material for laser selective melting (SLM) experiment, in order to obtain an almost completely dense Cu-10Sn alloy bulk sample by optimizing the SLM processing parameters. The relative density of the sample could be reached to 99.7%. The sample consists of two phases of intermetallic compound Cu41Sn11 and α-Cu solid solution. The grain morphology is mainly the columnar dendrite and interdendritic phases formed along the solidification direction, and high density dislocations are distributed within the crystals. Under the quasi-static tensile condition, the yield strength of the specimen is (392±6) MPa, the tensile strength is (749±5) MPa, and the plastic deformation is 29%±2.3%. The comprehensive mechanical properties are much higher than those of Cu-10Sn alloys prepared by casting methods.

张晓雅, 李现兵, 谈震, 曾勇, 田丽纷, 周正, 周振鲁, 贺定勇. 激光选区熔化水雾化Cu-10Sn合金粉末成形件的微观组织结构及力学性能研究[J]. 中国激光, 2018, 45(10): 1002009. Zhang Xiaoya, Li Xianbing, Tan Zhen, Zeng Yong, Tian Lifen, Zhou Zheng, Zhou Zhenlu, He Dingyong. Microstructure and Mechanical Properties of Water Atomized Cu-10Sn Alloy Powder Formed Parts by Selective Laser Melting[J]. Chinese Journal of Lasers, 2018, 45(10): 1002009.

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