均一化处理对增材制造镍基合金组织与性能的影响

doi:10.13251/j.issn.0254-6051.2025.09.018

金属热处理 ›› 2025, Vol. 50 ›› Issue (9): 118-124.DOI: 10.13251/j.issn.0254-6051.2025.09.018

均一化处理对增材制造镍基合金组织与性能的影响

胡雁阵¹, 李婷¹, Carlos Gracia², Caraballo Isaac Toda², Carallero Francisca Garcia², 于皓¹

1.东北大学轧制技术及连轧自动化国家重点实验室, 辽宁沈阳 110819;
2.西班牙国家冶金研究中心物理冶金系, 西班牙马德里 28040

收稿日期:2025-02-18 修回日期:2025-05-20 出版日期:2025-09-25 发布日期:2025-10-13
通讯作者: 于皓,副教授,博士,E-mail: yuhao@ral.neu.edu.cn
作者简介:胡雁阵(1998—),男,硕士研究生,主要研究方向为增材制造镍基合金计算设计与优化,E-mail: 2270424@stu.edu.cn。
基金资助:
科技部重点研发计划(2021YFB3702502)

Effect of homogenization treatment on microstructure and properties of nickel-based alloy prepared by additive manufacturing

Hu Yanzhen¹, Li Ting¹, Carlos Gracia², Caraballo Isaac Toda², Carallero Francisca Garcia², Yu Hao¹

1. The Key Laboratory of Rolling and Automation, Northeastern University, Shenyang Liaoning 110819, China;
2. Department of Physical Metallurgy, National Centre for Metallurgical Research (CENIM-CSIC), Madrid 28040, Spain

Received:2025-02-18 Revised:2025-05-20 Online:2025-09-25 Published:2025-10-13

摘要/Abstract

摘要： 采用激光定向沉积技术制备了自主设计的镍基合金AMS-nDB,通过热动力学模拟及组织与性能表征试验,系统探究了不同均一化工艺处理后,AMS-nDB合金的显微组织及力学性能的演化。结果表明,制备态AMS-nDB合金组织中存在沿打印方向的柱状晶,枝晶间区域有条状碳化物及显微孔洞弥散分布,硬度为406.5 HV0.5。经均一化工艺处理后,合金的硬度下降。1150 ℃及1300 ℃均一化温度下,保温1 h以上,可实现AMS-nDB合金成分的均一化分布,消除制备态组织中的元素偏析现象。1150 ℃保温1 h均一化工艺处理后,合金晶粒尺寸保持在200 μm以下,显微孔洞的尺寸及分布保持在较低水平(平均尺寸小于1.8 μm,面积分数低于0.3%),显微硬度达352.2 HV0.5,综合服役性能较好。

关键词: 增材制造, 镍基合金, 均一化处理, 组织, 性能

Abstract: A self-designed nickel-based alloy AMS-nDB was fabricated by using laser directed deposition (LDD) technology. Through thermodynamics simulation and microstructure and performance characterization tests, the evolution of microstructure and mechanical properties of the AMS-nDB alloy after different homogenization treatments was systematically investigated. The results show that the microstructure of the as-fabricated AMS-nDB alloy contains columnar grains along the printing direction, with strip-like carbides and micro-pores dispersedly distributed in the interdendritic regions, and the hardness is 406.5 HV0.5. After homogenization treatment, the hardness of the alloy decreases. After homogenization treatment at 1150 ℃ and 1300 ℃ holding for more than 1 h, the composition of the AMS-nDB alloy is uniformly distributed, and element segregation in the as-fabricated microstructure is eliminated. After homogenization treatment at 1150 ℃ for 1 h, the grain size of the alloy remains below 200 μm, the size and distribution of micro-pores are maintained at a low level (with an average size less than 1.8 μm and an area fraction lower than 0.3%), the microhardness reaches 352.2 HV0.5, and the comprehensive service performance is good.

Key words: additive manufacturing, nickel-based alloy, homogenization treatment, microstructure, properties

中图分类号:

TG142.71

胡雁阵, 李婷, Carlos Gracia, Caraballo Isaac Toda, Carallero Francisca Garcia, 于皓. 均一化处理对增材制造镍基合金组织与性能的影响[J]. 金属热处理, 2025, 50(9): 118-124.

Hu Yanzhen, Li Ting, Carlos Gracia, Caraballo Isaac Toda, Carallero Francisca Garcia, Yu Hao. Effect of homogenization treatment on microstructure and properties of nickel-based alloy prepared by additive manufacturing[J]. Heat Treatment of Metals, 2025, 50(9): 118-124.

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均一化处理对增材制造镍基合金组织与性能的影响

Effect of homogenization treatment on microstructure and properties of nickel-based alloy prepared by additive manufacturing

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