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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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作者单位:

1.沈阳工业大学 材料科学与工程学院,辽宁 沈阳 110870;2.中国科学院 金属研究所,辽宁 沈阳 110016

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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)


Influence of Post-Treatment Process on Microstructure and Properties of Laser Additively Manufactured Nickel-Based Superalloy
Author:
Affiliation:

1.School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China;2.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China

Fund Project:

National Key R&D Program of China (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,阻碍其在各领域应用。将热等静压(HIP)与传统热处理(HT)相结合,以获得缺陷少且性能理想的激光粉末床熔融(LPBF)镍基高温合金零件。结果表明,HIP工艺提高致密度,传统HT改善显微缺陷并提高力学性能。经HIP处理后,LPBF试样缺陷体积分数下降,经HT处理后,HIP+HT缺陷含量略有上升。经后处理后,硬度呈下降趋势,室温下,HIP+HT试样的抗拉伸强度和断后伸长率分别提高到1326 MPa和21.3%。

    Abstract:

    Defects such as cracks and micropores exist in nickel-based superalloy during laser powder bed fusion (LPBF), hindering their application in various fields. Hot isostatic pressing (HIP) was combined with conventional heat treatment (HT) to obtain LPBF nickel-based superalloy parts with ideal properties and fewer defects. The results show that HIP process can improve the densification, while the conventional HT can eliminate the micro-defects to improve the mechanical properties. After HIP treatment, the defect volume fraction of LPBF specimens decreases. After HT, the defect content of HIP+HT specimens increases slightly. After post-treatment, the hardness shows a decreasing trend, and the tensile strength and post-break elongation of HIP+HT specimens increase to 1326 MPa and 21.3%, respectively, at room temperature.

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陈爽,杨彦红,郭志强,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,2024,53(9):2478~2484.[Chen Shuang, Yang Yanhong, Guo Zhiqiang, Liang Jingjing, Li Jinguo, Zhou Yizhou. Influence of Post-Treatment Process on Microstructure and Properties of Laser Additively Manufactured Nickel-Based Superalloy[J]. Rare Metal Materials and Engineering,2024,53(9):2478~2484.]
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:2024-07-30
  • 录用日期:2024-02-01
  • 在线发布日期: 2024-09-12
  • 出版日期: 2024-09-04