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后处理工艺对一种激光增材制造镍基高温合金组织与性能的影响
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1.沈阳工业大学;2.中国科学院金属研究所

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基金项目:

国防基础科研计(JCKY2020130C024)、国家科技重大专项(Y2019-VII-0011-0151)、Science Center for Gas Turbine Project(HT-P2022-C-Ⅳ-002-001)


The influence of post-treatment process on the microstructure and properties of a laser additively manufactured nickel-based superalloy
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Shenyang University of Technology

Fund Project:

National Key R&D Program of China under Grant (No.2021YFB3700401)、 National Science and Technology Major Project (Y2019-VII-0011-0151)、Science Center for Gas Turbine Project (HT-P2022-C-Ⅳ-002-001)

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    摘要:

    在激光增材制造过程中镍基高温合金存在裂纹和微孔等缺陷,阻碍其在各领域中应用。本文将热等静压与传统热处理相结合,以获得缺陷少且性能理想的LPBF镍基高温合金零件。热等静压工艺提高致密度,传统热处理改变显微缺陷提高力学性能。经HIP处理后,LPBF试样缺陷体积分数降至0.0132%,经HT处理后,HIP+HT缺陷含量反弹至0.0252%。经后处理后,硬度呈下降趋势,室温下,HIP+HT试样抗拉强度和断后伸长率分别提高32.2%和474.7%。

    Abstract:

    Defects such as cracks and micropores existed in nickel-based superalloy during laser powder bed fusion (LPBF), hindering their application in various fields. In this paper, hot isostatic pressing was combined with conventional heat treatment to obtain LPBF nickel-based superalloy parts with fewer defects and ideal properties. The hot isostatic pressing process improved the densification, and the conventional heat treatment changed the micro-defects to improve the mechanical properties. After HIP treatment, the defect volume fraction of LPBF specimens decreased to 0.0132%, after HT treatment, the HIP+HT specimens defect content rebounded to 0.0252%. After post-treatment, the hardness showed a decreasing trend, and the tensile strength and elongation at break of HIP+HT specimens increased by 32.2% and 474.7%, respectively, at room temperature.

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陈 爽,杨彦红,梁静静,李金国,周亦胄.后处理工艺对一种激光增材制造镍基高温合金组织与性能的影响[J].稀有金属材料与工程,,().[Chen Shuang, Yang Yanhong, Liang Jingjing, Li Jinguo, Zhou Yizhou. The influence of post-treatment process on the microstructure and properties of a laser additively manufactured nickel-based superalloy[J]. Rare Metal Materials and Engineering,,().]
DOI:10.12442/j. issn.1002-185X.20230813

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历史
  • 收稿日期:2023-12-15
  • 最后修改日期:2024-01-15
  • 录用日期:2024-02-01
  • 在线发布日期: 2024-03-25
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