热处理对CMT电弧增材沉积Inconel 625合金组织与性能的影响

doi:10.13251/j.issn.0254-6051.2024.10.004

金属热处理 ›› 2024, Vol. 49 ›› Issue (10): 25-30.DOI: 10.13251/j.issn.0254-6051.2024.10.004

热处理对CMT电弧增材沉积Inconel 625合金组织与性能的影响

蒋瑞鑫^1,2, 韩国峰³, 牛宗伟², 王文宇³, 黄湘远⁴, 赵阳³

1.山东科技职业学院, 山东潍坊 261053;
2.山东理工大学机械工程学院, 山东淄博 255000;
3.陆军装甲兵学院再制造技术国家重点实验室, 北京 100072;
4.陆军指挥学院作战实验室, 江苏南京 210031

收稿日期:2024-04-22 修回日期:2024-07-29 出版日期:2024-11-28 发布日期:2024-11-28
通讯作者: 韩国峰,副研究员,博士,E-mail: faf428@sina.com
作者简介:蒋瑞鑫(1997—),男,硕士研究生,主要研究方向为镍基高温合金的增材修复,E-mail: jrx_08mail@qq.com。
基金资助:
国家重点研发项目(2018YFB1105800)

Effect of heat treatment on microstructure and properties of CMT arc additive deposited Inconel 625 alloy

Jiang Ruixin^1,2, Han Guofeng³, Niu Zongwei², Wang Wenyu³, Huang Xiangyuan⁴, Zhao Yang³

1. Shandong Vocational College of Science and Technology,Weifang Shandong 261053, China;
2. College of Mechanical Engineering, Shandong University of Technology, Zibo Shandong 255000, China;
3. State Key Laboratory of Remanufacturing Technology, Army Armored Forces Academy, Beijing 100072, China;
4. Combat Laboratory, Army Command College, Nanjing Jiangsu 210031, China

Received:2024-04-22 Revised:2024-07-29 Online:2024-11-28 Published:2024-11-28

摘要/Abstract

摘要： 对CMT电弧增材沉积Inconel 625合金进行直接时效处理(720 ℃×8 h＋620 ℃×8 h,空冷)和固溶处理(950、1000、1100、1200、1250 ℃×1 h,水冷),通过力学性能测试、电化学动电位极化测试、光学显微镜和场发射扫描电镜(SEM)及其自带的能谱分析仪(EDS)分析了不同热处理工艺对沉积态Inconel 625合金组织与性能的影响。结果表明,时效处理对沉积态合金组织中Laves相影响不明显;随固溶温度升高,组织由沉积态树枝晶转变为等轴晶,有害相Laves相溶解消失。时效处理可显著提升合金的硬度和抗拉强度,相较于沉积态硬度和抗拉强度分别提升35.1 HV0.5和176.4 MPa,但塑性降低;1200 ℃固溶处理能够明显提升合金的塑性,较沉积态断裂总延伸率提升49.6%。时效处理对合金的耐蚀性影响不明显;1200 ℃固溶处理可显著提高合金的耐蚀性,较沉积态自腐蚀电位提高22.8%,自腐蚀电流密度降低46.9%。

关键词: Inconel 625合金, 热处理, 组织, 力学性能, 耐蚀性能

Abstract: Direct aging treatment (720 ℃×8 h＋620 ℃×8 h, air cooling) and solution treatment (950, 1000, 1100, 1200, 1250 ℃×1 h, water cooling) were conducted on the Inconel 625 alloy arc additive deposited by CMT (cold metal transfer). The effects of different heat treatment processes on the microstructure and properties of the deposited Inconel 625 alloy were analyzed by mechanical properties test, electrochemical potentiodynamic polarization test, optical microscope, field emission scanning electron microscope (SEM) and EDS. The results show that the effect of aging treatment on the Laves phase in the deposited alloy is not obvious. As the solution treatment temperature increases, the microstructure changes from deposited dendrites to equiaxed grains, and the harmful Laves phase dissolves and disappears. Aging treatment can significantly improve the hardness and tensile strength of the alloy, compared with that of the deposited state, the hardness and tensile strength are increased by 35.1 HV0.5 and 176.4 MPa, respectively, but the plasticity is reduced. Solution treatment at 1200 ℃ can significantly improve the plasticity of the alloy, compared with that of the deposited state, the percentage total extension at fracture is increased by 49.6%. Aging treatment has no obvious effect on the corrosion resistance of the alloy, but solution treatment at 1200 ℃ can significantly improve the corrosion resistance of the alloy as the self-corrosion potential increased by 22.8% and the self-corrosion current density reduced by 46.9% compared with that of the deposited state.

Key words: Inconel 625 alloy, heat treatment, microstructure, mechanical properties, corrosion resistance

中图分类号:

TG156

蒋瑞鑫, 韩国峰, 牛宗伟, 王文宇, 黄湘远, 赵阳. 热处理对CMT电弧增材沉积Inconel 625合金组织与性能的影响[J]. 金属热处理, 2024, 49(10): 25-30.

Jiang Ruixin, Han Guofeng, Niu Zongwei, Wang Wenyu, Huang Xiangyuan, Zhao Yang. Effect of heat treatment on microstructure and properties of CMT arc additive deposited Inconel 625 alloy[J]. Heat Treatment of Metals, 2024, 49(10): 25-30.

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热处理对CMT电弧增材沉积Inconel 625合金组织与性能的影响

Effect of heat treatment on microstructure and properties of CMT arc additive deposited Inconel 625 alloy

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