直接时效处理对锤击复合激光沉积GH4169高温合金组织及性能的影响

doi:10.13251/j.issn.0254-6051.2024.10.013

金属热处理 ›› 2024, Vol. 49 ›› Issue (10): 85-91.DOI: 10.13251/j.issn.0254-6051.2024.10.013

直接时效处理对锤击复合激光沉积GH4169高温合金组织及性能的影响

魏文逸

辽宁开放大学辽宁装备制造职业技术学院, 辽宁沈阳 110034

收稿日期:2024-07-01 修回日期:2024-09-04 出版日期:2024-11-28 发布日期:2024-11-28
作者简介:魏文逸(1990—),女,讲师,硕士,主要研究方向为增材制造及焊接,E-mail:2220607548@qq.com
基金资助:
2021年度辽宁省教育厅高等学校基本科研项目(青年项目)(LJKQZ2021160)

Effect of direct aging treatment on microstructure and properties of hammering composite laser deposited GH4169 superalloy

Wei Wenyi

Liaoning Equipment Manufacturing Vocational and Technical College, Liaoning Open University, Shenyang Liaoning 110034, China

Received:2024-07-01 Revised:2024-09-04 Online:2024-11-28 Published:2024-11-28

摘要/Abstract

摘要： 对层间锤击复合激光定向能量沉积(HDED)工艺获得的GH4169高温合金试件进行了直接时效处理。结果表明,经过HDED工艺后试件的组织呈等轴晶和柱状晶交替分布的晶粒形貌,且Laves相含量减少。Laves相的回溶促进了直接时效处理过程中γ″相和δ相的析出,同时细小的等轴晶和试件内部的加工硬化效应在直接时效处理后得以保留。等轴晶的生成对试件产生了细晶强化效应,γ″相的析出为试件提供了沉淀强化作用,因此直接时效处理后试件的力学性能得到了明显提升,其硬度提高到了457.1 HV0.2,横向和纵向抗拉强度分别提高到了1205和1140 MPa。

关键词: 层间锤击复合激光定向能量沉积, GH4169合金, 直接时效处理, 力学性能, 显微组织

Abstract: Direct aging treatment of GH4169 superalloy obtained through hammering directed energy deposition (HDED) process was carried out. The results show that the microstructure of the specimen after HDED process is characterized by alternating distribution of equiaxed and columnar grains, and the content of Laves phase is reduced. The redissolution of the Laves phase promotes the precipitation of the γ″ phase and δ phase during direct aging process, while the small equiaxed grains and the work hardening effect of the specimen are retained after direct aging treatment. The small equiaxed grains produce fine grain strengthening effect, and the precipitation of the γ″ phase provides precipitation strengthening effect, by which the mechanical properties of the specimens are significantly improved after direct aging treatment, where the hardness is increased to 457.1 HV0.2, and the transverse and longitudinal tensile strengths are increased to 1205 and 1140 MPa, respectively.

Key words: HDED, GH4169 alloy, direct aging treatment, mechanical properties, microstructure

中图分类号:

TG166.7

魏文逸. 直接时效处理对锤击复合激光沉积GH4169高温合金组织及性能的影响[J]. 金属热处理, 2024, 49(10): 85-91.

Wei Wenyi. Effect of direct aging treatment on microstructure and properties of hammering composite laser deposited GH4169 superalloy[J]. Heat Treatment of Metals, 2024, 49(10): 85-91.

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直接时效处理对锤击复合激光沉积GH4169高温合金组织及性能的影响

Effect of direct aging treatment on microstructure and properties of hammering composite laser deposited GH4169 superalloy

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