激光粉末床熔融GH3536合金的显微组织和力学性能

梁升翔; 李瑞迪; 袁铁锤; 张毅; 马鑫; 黄敏

doi:10.19976/j.cnki.43-1448/TF.2025032

粉末冶金材料科学与工程 >

2025 , Vol. 30 >Issue 5: 414 - 423

DOI: https://doi.org/10.19976/j.cnki.43-1448/TF.2025032

工艺技术

激光粉末床熔融GH3536合金的显微组织和力学性能

梁升翔 ,
李瑞迪 ,
袁铁锤 ,
张毅 ,
马鑫 ,
黄敏

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1.中南大学粉末冶金全国重点实验室,长沙 410083;
2.中国航发南方工业有限公司,株洲 412002

收稿日期: 2025-03-27

修回日期: 2025-08-12

网络出版日期: 2025-11-27

基金资助

国家重点研发计划资助项目(2024YFB4609702); AECC产学研合作项目(HFZL2023CXY024)

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Microstructure and mechanical properties of GH3536 alloy by laser powder bed fusion

LIANG Shengxiang ,
LI Ruidi ,
YUAN Tiechui ,
ZHANG Yi ,
MA Xin ,
HUANG Min

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1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
2. AECC South Industry Company Limited, Zhuzhou 412002, China

Received date: 2025-03-27

Revised date: 2025-08-12

Online published: 2025-11-27

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摘要

GH3536合金在高温下能保持稳定的性能,被广泛应用于涡流器、发动机叶片等耐高温零部件。本文采用激光粉末床熔融工艺,以分区块旋转扫描方式制备GH3536合金块体,通过扫描电镜和电子背散射衍射表征合金表面的显微组织,并测试打印态合金室温下的力学性能和显微硬度。结果表明：GH3536合金内部存在少量孔隙和裂纹,水平面(XOY面)和建造面(XOZ面)组织差别较大,前者存在相互平行的扫描轨迹,后者存在熔池,在熔池边界晶粒细小,位错密度较高。合金平行于XOY面和平行于XOZ面的室温抗拉强度分别为878 MPa和762 MPa,伸长率分别为32%和42%。合金拉伸断口处存在大量细小的韧窝,XOY方向和XOZ方向的显微硬度(HV_0.2)分别为308和299。

关键词： 激光粉末床熔融; 镍基高温合金; 各向异性; 显微组织; 力学性能

本文引用格式

梁升翔 , 李瑞迪 , 袁铁锤 , 张毅 , 马鑫 , 黄敏 . 激光粉末床熔融GH3536合金的显微组织和力学性能[J]. 粉末冶金材料科学与工程, 2025 , 30(5) : 414 -423 . DOI: 10.19976/j.cnki.43-1448/TF.2025032

Abstract

GH3536 alloy exhibits stable performance at elevated temperatures and is extensively utilized in high-temperature resistant components, including eddy current devices and engine blades. In this research, GH3536 alloy blocks were fabricated using laser powder bed fusion with partitioned block rotating scanning. The surface microstructure of the alloy was analyzed through scanning electron microscope and electron backscatter diffraction. Additionally, the mechanical properties and microhardness of the printed alloy were evaluated at room temperature. The results indicate that GH3536 alloy exhibits a limited number of pores and microcracks. Furthermore, a distinct microstructural difference is observed between the horizontal surface (XOY plane) and the constructed surface (XOZ plane). The XOY plane displays parallel scanning tracks, whereas the XOZ plane reveals melt pools, and the grains are fine and the dislocation density is relatively high at the melt pool boundaries. The room temperature tensile strengths of the alloy parallel to the XOY direction and the XOZ direction are 878 MPa and 762 MPa, respectively, and the elongation rates are 32% and 42%, respectively. There are a large number of small dimples at the tensile fracture. The microhardness (HV_0.2) for the XOY and XOZ planes are 308 and 299, respectively.

Key words： laser powder bed fusion; nickel-base superalloy; anisotropy; microstructure; mechanical property

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