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基板预热、重熔、预烧结对激光选区熔化Ti-47Al-2Cr-2Nb裂纹形成的影响
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1.浙江海洋大学 海洋工程装备学院,浙江 舟山 316022;2.北京理工大学 机械与车辆学院,北京 100081

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Effect of Substrate Preheating, Remelting, In-situ Presintering on Crack Formation of Ti-47Al-2Cr-2Nb Fabricated by Selective Laser Melting
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Affiliation:

1.School of Marine Engineering Equipment, Zhejiang Ocean University, Zhoushan 316022, China;2.School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China

Fund Project:

Zhoushan Science and Technology Project (2019C21014); National Natural Science Foundation of China (51875042)

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    摘要:

    为了抑制激光选区熔化(SLM)制备Ti-47Al-2Cr-2Nb合金时裂纹的形成,研究了基板预热、重熔和预烧结等方法对裂纹形成和表面质量的影响。结果表明,基板预热、重熔和预烧结可以在一定程度上减少裂纹的形成,致密度提高了1.71%~4.34%;重熔有助于改善表面质量,但会明显降低生产效率;另外,基板预热与预烧结相结合,能更有效地防止裂纹的产生,致密度超过99%。

    Abstract:

    The methods of substrate preheating, remelting and in-situ presintering were proposed to fabricate Ti-47Al-2Cr-2Nb by selective laser melting (SLM). The effects of these approaches on the formation of cracks and surface quality were investigated. The results indicate that substrate preheating, remelting and in-situ presintering powder can reduce the formation of cracks to a certain extent, and the density is increased by 1.71%~4.34%. Remelting contributes to improvement of the surface quality but greatly reduces the productivity. In addition, the combination of substrate preheating and in-situ presintering can effectively prevent the occurrence of cracks, and the density is over 99%.

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石学智,黄赟锋,李振华,冯武卫,马树元.基板预热、重熔、预烧结对激光选区熔化Ti-47Al-2Cr-2Nb裂纹形成的影响[J].稀有金属材料与工程,2022,51(8):2739~2744.[Shi Xuezhi, Huang Yunfeng, Li Zhenhua, Feng Wuwei, Ma Shuyuan. Effect of Substrate Preheating, Remelting, In-situ Presintering on Crack Formation of Ti-47Al-2Cr-2Nb Fabricated by Selective Laser Melting[J]. Rare Metal Materials and Engineering,2022,51(8):2739~2744.]
DOI:10.12442/j. issn.1002-185X.20210600

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历史
  • 收稿日期:2021-07-10
  • 最后修改日期:2022-07-15
  • 录用日期:2021-08-25
  • 在线发布日期: 2022-08-31
  • 出版日期: 2022-08-29