Three-dimensional direct writing technology of low melting point molten metal

被引：0
|
作者：
Yang L. [1 ]
Shan Z. [1 ]
Rong W. [1 ]
Liu F. [1 ]
Wang Y. [1 ]
机构：
[1] State Key Laboratory of Advanced Forming Technology & Equipment, China Academy of Machinery Science & Technology, Beijing
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2018年 / 49卷 / 10期
关键词：
Additive manufacturing; Nozzle; Temperature field; Thin-wall part; Three-dimensional direct writing;
D O I：
10.11817/j.issn.1672-7207.2018.10.006
中图分类号：
学科分类号：
摘要：
For the additive manufacturing technologies of metal part have some problems, such as high cost and low efficiency, three-dimensional direct writing of low melting point molten metal, a new type of high-efficiency and directly metal parts additive forming technology was proposed. This technology is suitable for the trial manufacture of small batch and complex metal mould and parts in automobile, machine tool and other industries. Firstly, the principle of three-dimensional direct writing technology was introduced. Then, the structure of direct writing nozzle and its temperature distribution during use were analyzed. At last, by using the method of combining finite element simulation with process test, the three-dimensional direct writing process of thin-walled metal part was studied. The results show that the temperature of the direct writing nozzle is distributed in parabola along the height, and the nozzle can realize the functions of continuous guide wire and high efficiency fuse. In the process of three-dimensional direct writing, the temperature distribution is extremely uneven, and with the increase of forming height, the high temperature heat affected zone continues to expand, and the heat dissipation path becomes longer. The cyclic temperature variation at the node of the formed part causes interlayer remelting between the adjacent two layers. The thin-wall metal part can be realized by using the three-dimensional direct writing technology of molten metal, and the metallurgical integration between the interlayer of the formed parts is achieved. © 2018, Central South University Press. All right reserved.
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页码：2405 / 2412
页数：7
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共 20 条
  • [1] Buchbinder D., Schleifenbaum H., Heidrich S., Et al., High power selective laser melting (HP SLM) of aluminum parts, Physics Procedia, 12, 1, pp. 271-278, (2011)
  • [2] Li H., Gong S., Sun F., Et al., Development and application of laser additive manufacturing for metal component, Aeronautical Manufacturing Technology, 55, 20, pp. 26-31, (2012)
  • [3] Sun H., Zhao F., Lin S., Et al., Research progress and development trend on laser cladding, Laser Journal, 29, 1, pp. 4-6, (2008)
  • [4] Nikolas H., Timothy Q., Effects of processing on microstructure and mechanical properties of a titanium alloy (Ti-6Al-4V) fabricated using electron beam melting (EBM), Materials Science & Engineering, 573, 3, pp. 264-277, (2013)
  • [5] Yan Y., Qi H., Lin F., Et al., Produced three-dimensional metal parts by electron beam selective melting, Chinese Journal of Mechanical Engineering, 43, 6, pp. 87-92, (2007)
  • [6] Yang G., Gong S., Suo H., Et al., Microstructure characterization of multi-deposited TC18 alloy by electron beam rapid manufacture, Aeronautical Manufacturing Technology, 56, 8, pp. 71-74, (2013)
  • [7] Sun S.H., Koizumi Y., Kurosu S., Et al., Build direction dependence of microstructure and high-temperature tensile property of Co-Cr-Mo alloy fabricated by electron beam melting, Acta Materialia, 64, 2, pp. 154-168, (2014)
  • [8] Dai X., Chen H., Lei J., Et al., Study on microstructure characteristics and properties of 304 stainless steel by laser additive manufacturing, Hot Working Technology, 46, 16, pp. 83-86, (2017)
  • [9] Yang Y., Wang J., Research progress of laser direct rapid forming metallic components, Heat Treatment Technology and Equipment, 27, 3, pp. 13-17, (2006)
  • [10] Yang L., Basic study on 3D direct writing technology and equipment of low melting point molten metal, pp. 19-25, (2016)
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