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SLM实时预熔/重熔的新型成型工艺研究

刘志远 钱波 李培 张剑睿 池敏 李腾飞

刘志远, 钱波, 李培, 张剑睿, 池敏, 李腾飞. SLM实时预熔/重熔的新型成型工艺研究[J]. 机械科学与技术, 2019, 38(4): 566-570. doi: 10.13433/j.cnki.1003-8728.20180197
引用本文: 刘志远, 钱波, 李培, 张剑睿, 池敏, 李腾飞. SLM实时预熔/重熔的新型成型工艺研究[J]. 机械科学与技术, 2019, 38(4): 566-570. doi: 10.13433/j.cnki.1003-8728.20180197
Liu Zhiyuan, Qian Bo, Li Pei, Zhang Jianrui, Chi Min, Li Tengfei. Research on a New SLM Process of Pre-melting and Re-melting[J]. Mechanical Science and Technology for Aerospace Engineering, 2019, 38(4): 566-570. doi: 10.13433/j.cnki.1003-8728.20180197
Citation: Liu Zhiyuan, Qian Bo, Li Pei, Zhang Jianrui, Chi Min, Li Tengfei. Research on a New SLM Process of Pre-melting and Re-melting[J]. Mechanical Science and Technology for Aerospace Engineering, 2019, 38(4): 566-570. doi: 10.13433/j.cnki.1003-8728.20180197

SLM实时预熔/重熔的新型成型工艺研究

doi: 10.13433/j.cnki.1003-8728.20180197
基金项目: 

国家自然科学基金项目 21206152

详细信息
    作者简介:

    刘志远(1994-), 硕士, 研究方向为金属3D打印(SLM)的成型工艺以及成型件性能强化, 1275578590@qq.com

    通讯作者:

    钱波, 副教授, 博士, qianbo@ecust.edu.cn

  • 中图分类号: TH825;O329

Research on a New SLM Process of Pre-melting and Re-melting

  • 摘要: SLM(Selective laser melting)工艺是增材制造领域发展较为迅猛的一种工艺,其在复杂金属结构零件的制造领域具有极大的优势。为了降低SLM工艺的孔隙率,获得更高的致密度,以及更好的机械性能(硬度),提出了一种新型工艺,先对粉末层进行低激光功率的预熔处理,然后使用高功率的激光再次熔化,实现逐层重熔。8组对比试验结果表明:与只经过单熔处理的零件相比,经过预熔与重熔两次熔化后的零件,孔隙率从0.186%减少到0.039%,硬度从237.5 HV提高到264.3 HV,组织均匀性提高,组织呈马氏体结构。由此说明,SLM实时预熔重熔成型工艺在复杂金属结构零件的制造领域,具有较好的应用前景。
  • 图  1  YIBO RP SLM80设备

    图  2  分区扫描策略

    图  3  预熔及重熔扫描策略分区

    图  4  样件孔隙分布的光学显微图像(抛光处理)

    图  5  样件上表面微观光学显微图像

    图  6  样件的垂直截面图

    图  7  微观组织图

    图  8  样件1~8的平均硬度值

    图  9  孔隙率与硬度的关系

    表  1  对比试验参数

    样件编号 1 2 3 4 5 6 7 8
    预熔功率/W 120 150 180 210 210 210 210
    重熔功率/W 210 210 210 210 210 240 270 300
    下载: 导出CSV
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出版历程
  • 收稿日期:  2017-12-21
  • 刊出日期:  2019-04-05

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