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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中文摘要：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1326MPa和21.3％.

外文标题：Influence of Post-Treatment Process on Microstructure and Properties of Laser Additively Manufactured Nickel-Based Superalloy

外文摘要：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.

外文关键词：

nickel-based superalloylaser powder bed fusionpost-treatmentmicrostructureproperties

作者：

陈爽、杨彦红、郭志强、梁静静、李金国、周亦胄

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作者单位：

沈阳工业大学材料科学与工程学院,辽宁沈阳 110870

中国科学院金属研究所,辽宁沈阳 110016

关键词：

镍基高温合金激光粉末床熔融后处理组织性能

基金：

National Key R&D Program of ChinaNational Science and Technology Major ProjectScience Center for Gas Turbine Project

项目编号：

2021YFB3700401Y2019-Ⅶ-0011-0151HT-P2022-C-IV-002-001

出版年：

2024

DOI：

10.12442/j.issn.1002-185X.20230813

稀有金属材料与工程

中国有色金属学会,中国材料研究学会,西北有色金属研究院

稀有金属材料与工程

CSTPCD北大核心

影响因子：0.634

ISSN：1002-185X

年,卷(期)：2024.53(9)