Research on Preparation of Magnesium Alloy/Binder Composite Wires and FDM Printing Process
-
摘要: 镁合金具有质轻、比强度高、减震性好、生物相容性高等特点,在航空、航天、生物医疗等领域应用潜力巨大。然而传统的加工技术无法实现一体化复杂结构件的制备,严重制约了镁合金零件的应用推广。增材制造技术是一种基于"离散+堆积"原理的先进技术,有望成为解决镁合金复杂、薄壁结构件难加工的重要技术途径。本研究通过密炼机将高分子黏结剂与镁合金金属粉末混合,利用挤出机制备了适用于熔融沉积(FDM)技术的丝材原料,并研究了FDM工艺对生坯表面形貌的影响规律,采用正交实验和数据统计分析了工艺水平因素对尺寸精度的影响,并提出了后续烧结工序的改进方向。Abstract: Magnesium alloys have the characteristics of lightweight, high specific strength, excellent shock absorption and high biocompatibility, which have great potential for the application in the fields such as aviation, aerospace, and biomedical engineering. However, the traditional processing techniques can hardly achieve the preparation of the integrated complex structural components, having seriously restricted the application and popularization of the magnesium alloy parts. Additive manufacturing technology is an advanced technology based on the principle of "discretization+stacking", which is expected to become an important technological approach to solve the problem of complex and difficult machining of thin-walled structural components of the magnesium alloys. In this study, an internal mixer is adopted to mix polymer binder with magnesium alloy powders, and an extrusion machine is employed to prepare wire materials suitable for the fused deposition modeling (FDM) process. The influence of FDM process on the surface morphologies of the green billets is investigated. The orthogonal experiments and data statistics are used to analyze the influence of process level factors on the dimensional accuracy, and the improvement directions for the subsequent sintering processes are proposed.
-
Keywords:
- magnesium alloy /
- binder /
- composite wires /
- FDM /
- process prarameters
-
-
[1] HAN D, ZHANG J, HUANG J F, et al. A review on ignition mechanisms and characteristics of magnesium alloys[J]. Journal of Magnesium and Alloys, 2020, 8(2): 329-344.
[2] BAZHENOV V, KOLTYGIN A, KOMISSAROV A, et al. Gallium-containing magnesium alloy for potential use as temporary implants in osteosynthesis[J]. Journal of Magnesium and Alloys, 2020, 8(2): 352-363.
[3] 钟智. 镁合金点阵结构激光选区熔化成型及力学性能研究[D]. 贵阳: 贵州大学, 2021. [4] LIU Z Y, ZHAO D D, WANG P, et al. Additive manufacturing of metals: Microstructure evolution and multistage control[J]. Journal of Materials Science & Technology, 2022, 100: 224-236.
[5] QIAN G A, LI Y F, PAOLINO D S, et al. Very high cycle fatigue behavior of Ti-6Al-4V manufactured by selective laser melting: effect of build orientation[J]. International Journal of Fatigue, 2020, 136: 105628.
[6] JAMSHIDI P, ARISTIZABAL M, KONG W H, et al. Selective laser melting of Ti-6Al-4V: the impact of post-processing on the tensile, fatigue and biological properties for medical implant applications[J]. Materials, 2020, 13(12): 2813.
[7] ATTAR H, EHTEMAM-HAGHIGHI S, KENT D, et al. Recent developments and opportunities in additive manufacturing of titanium-based matrix composites: a review[J]. International Journal of Machine Tools and Manufacture, 2018, 133: 85-102.
[8] YANG H H, MENG L, LUO S C, et al. Microstru-ctural evolution and mechanical performances of selective laser melting Inconel 718 from low to high laser power[J]. Journal of Alloys and Compounds, 2020, 828: 154473.
[9] TUCHO W M, CUVILLIER P, SJOLYST-KVERNELAND A, et al. Microstructure and hardness studies of Inconel 718 manufactured by selective laser melting before and after solution heat treatment[J]. Materials Science and Engineering: A, 2017, 689: 220-232.
[10] LUO S C, HUANG W P, YANG H H, et al. Micros-tructural evolution and corrosion behaviors of Inconel 718 alloy produced by selective laser melting following different heat treatments[J]. Additive Manufacturing, 2019, 30: 100875.
[11] BIFFI C A, FIOCCHI J, TUISSI A. Selective laser melting of AlSi10Mg: influence of process parameters on Mg2Si precipitation and Si spheroidization[J]. Journal of Alloys and Compounds, 2018, 755: 100-107.
[12] ZHAO N, NASH P. The journal of materials science in China[J]. Journal of Materials Science, 2019, 54: 5989-5991.
[13] GUAN J R, JIANG Y H, ZHANG X W, et al. Microstructural evolution and EBSD analysis of AlSi10Mg alloy fabricated by selective laser remelting[J]. Materials Characterization, 2020, 161: 110079.
[14] 唐伟能, 莫宁, 侯娟. 增材制造镁合金技术现状与研究进展[J]. 金属学报, 2023, 59(2): 205-225. [15] WANG J, ZHAO Z Y, BAI P K, et al. Microstructu-re and mechanical properties of AZ31 magnesium alloy prepared using wire arc additive manufacturing[J]. Journal of Alloys and Compounds, 2023, 939: 168665.
[16] WANG Z H, WANG J F, LIN X, et al. Solidification microstructure evolution and its correlations with mechanical properties and damping capacities of Mg-Al-based alloy fabricated using wire and arc additive manufacturing[J]. Journal of Materials Science & Technology, 2023, 144: 28-44.
[17] 晏小康. 金属浆料喷射3D打印成形微小复杂三维结构关键技术及机理[D]. 武汉: 中国地质大学, 2019. [18] 林梓威. 高分子金属复合材料3D打印成型机理及工艺研究[D]. 广州: 华南理工大学, 2019. [19] 阚鑫锋. 316L脱粘烧结型熔丝增材制造及加铜改性研究[D]. 北京:北京科技大学, 2022. [20] 骆书虎. 基于FDM铜粉复合丝材打印及脱脂烧结工艺研究[D]. 镇江: 江苏科技大学, 2022.
计量
- 文章访问数: 132
- HTML全文浏览量: 24
- PDF下载量: 20
下载:
