Study of Microstructure, Mechanical Properties, and Creep Properties of GH4169 Alloy After Homogenization Heat Treatment Using Arc Additive Manufacturing

SI Fugui; SUN Dezhi; XU Yakun; XU Yingcui; CHENG Haojie; LIU Zhiyong; XIA Changgeng; WANG Mengzhi; LIU Anhui

doi:10.7512/j.issn.1001-2303.2024.02.05

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Study of Microstructure, Mechanical Properties, and Creep Properties of GH4169 Alloy After Homogenization Heat Treatment Using Arc Additive Manufacturing
Vol. 54, Issue 2, Pages: 30-36(2024)
DOI： 10.7512/j.issn.1001-2303.2024.02.05

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司福贵，孙德志，徐亚坤，等.电弧增材制造GH4169合金均匀化热处理组织特征、力学性能和蠕变性能研究［J］.电焊机，2024，54（2）：30-36.

SI Fugui, SUN Dezhi, XU Yakun, et al.Study of Microstructure, Mechanical Properties, and Creep Properties of GH4169 Alloy After Homogenization Heat Treatment Using Arc Additive Manufacturing[J].Electric Welding Machine, 2024, 54(2): 30-36.
司福贵，孙德志，徐亚坤，等.电弧增材制造GH4169合金均匀化热处理组织特征、力学性能和蠕变性能研究［J］.电焊机，2024，54（2）：30-36. DOI： 10.7512/j.issn.1001-2303.2024.02.05.

SI Fugui, SUN Dezhi, XU Yakun, et al.Study of Microstructure, Mechanical Properties, and Creep Properties of GH4169 Alloy After Homogenization Heat Treatment Using Arc Additive Manufacturing[J].Electric Welding Machine, 2024, 54(2): 30-36. DOI： 10.7512/j.issn.1001-2303.2024.02.05.

摘要

为深入探究电弧增材制造GH4169合金热处理组织特征，针对不同热处理工艺对GH4169合金组织及相的影响开展研究，以确定最佳的均匀化热处理工艺。采用电弧熔丝增材制造技术成形GH4169合金试块，研究不同均匀化热处理温度下试样微观组织和力学性能的变化。结果显示，随着均匀化温度的提升，Laves 相逐渐溶解至完全溶解，试样组织逐渐变得均匀。当均匀化温度升至 1 100 ℃时，Laves相完全溶解，试样水平方向和垂直方向均为等轴晶，组织各向异性消除。经过 1 100 ℃均匀化处理再进行固溶+双时效处理，材料强度明显提升，相比沉积态增加50%，且材料的蠕变性能远高于锻件标准。研究表明，通过控制均匀化热处理温度和后续的热处理工艺，能有效提升电弧增材制造GH4169合金的力学性能和蠕变性能。对于优化电弧增材制造GH4169合金的工艺参数，提高其综合性能具有重要意义。

Abstract

In order to investigate the microstructure characteristics of arc additive manufacturing GH4169 alloy during heat treatment

the study was conducted on the effects of different heat treatment processes on the microstructure and phases of GH4169 alloy

in order to determine the optimal homogenization heat treatment process. The effect of different homogenization heat treatment temperature on the microstructure and mechanical properties of the specimen was studied by using arc fuse additive manufacturing technology. The results show that with the increase of homogenization temperature

the Laves phase gradually dissolves to complete dissolution and the sample structure gradually became uniform. When the homogenization temperature is 1 100 ℃

the Laves phase is completely dissolved

the sample organization of the horizontal and vertical directions are equiaxed crystals

and eliminating organizational anisotropy. After homogenization treated at 1 100 ℃ and solid solution +double aging heat treatment

the strength of the material was significantly improved

increased by 50% compared to the deposited state

and creep performance of the material is much higher than the forging standard. Studies have shown that the mechanical properties and creep properties of GH4169 alloy can be effectively improved by controlling the homogenization heat treatment temperature and subsequent heat treatment process. It is of great significance to optimize the process parameters of arc additive manufacturing GH4169 alloy and improve its comprehensive performance.

关键词

电弧熔丝增材制造GH4169高温合金均匀化热处理微观组织力学性能

Keywords

arc wire additive manufacturingGH4169 superalloyhomogenization heat treatmentmicrostructuremechanical properties

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