载气流量对激光熔覆添加Y2O3的镍基涂层组织和耐腐蚀性的影响

doi:10.13251/j.issn.0254-6051.2024.02.044

金属热处理 ›› 2024, Vol. 49 ›› Issue (2): 281-290.DOI: 10.13251/j.issn.0254-6051.2024.02.044

载气流量对激光熔覆添加Y₂O₃的镍基涂层组织和耐腐蚀性的影响

李云峰¹, 王嘉圣¹, 石岩^2,3, 姜广君¹, 唐术锋¹, 何晓东¹

1.内蒙古工业大学机械工程学院, 内蒙古呼和浩特 010051;
2.长春理工大学机电工程学院, 吉林长春 130022;
3.国家国际光学科技合作基地, 吉林长春 130022

收稿日期:2023-09-03 修回日期:2023-12-25 出版日期:2024-03-27 发布日期:2024-03-27
作者简介:李云峰(1989—),男,讲师,博士,主要研究方向为激光加工技术,E-mail:liyunfeng@imut.edu.cn
基金资助:
内蒙古自治区自然科学基金青年基金(2023QN05013);内蒙古自治区直属高校基本科研业务费项目(JY20220262,JY2022016);内蒙古工业大学科研启动金项目(DC2200000878);内蒙古自治区高等学校创新团队发展计划(NMGIRT2213)

Influence of carrier gas flow rate on microstructure and corrosion resistance of laser clad Ni-based coatings with Y₂O₃

Li Yunfeng¹, Wang Jiasheng¹, Shi Yan^2,3, Jiang Guangjun¹, Tang Shufeng¹, He Xiaodong¹

1. College of Mechanical Engineering, Inner Mongolia University of Technology, Hohhot Inner Mongolia 010051, China;
2. School of Mechanical and Electric Engineering, Changchun University of Science and Technology, Changchun Jilin 130022, China;
3. National Base of International Science and Technology Cooperation for Optics, Changchun Jilin 130022, China

Received:2023-09-03 Revised:2023-12-25 Online:2024-03-27 Published:2024-03-27

摘要/Abstract

摘要： 采用5 kW二氧化碳激光,在42CrMoA钢基体上制备纯Ni45合金涂层和Ni45+0.4wt%Y₂O₃涂层。用FLUENT软件对载气流量进行了数值模拟。采用光学显微镜、扫描电镜和XRD测试仪对两种涂层的宏观形态和微观结构进行了表征。结果表明,当载气流量从500 L/h提高到700 L/h时,粉末收敛点的浓度先增大后降低;两种涂层凝固类型由平面晶、胞状晶、柱状枝晶和等轴晶组成;两种涂层由γ-Ni、M₂₃C₆和Ni₃B组成;采用600 L/h载气流量涂层的微观结构细化程度最好。耐腐蚀性随载气流量的增加而增加,随后又降低,采用600 L/h载气流量的涂层耐腐蚀性最好。

关键词: 镍基激光熔覆涂层, Y₂O₃, 数值模拟, 微观结构, 耐腐蚀性

Abstract: A 5 kW CO₂ laser was used for the preparation of pure Ni45 alloy coating and Ni45+0.4wt%Y₂O₃ coating on 42CrMoA steel substrate. Numerical simulation of the carrier gas flow rate was conducted using FLUENT software. The macroscopic morphologies and microstructure of the two coatings with different carrier gas flow rates were characterized using optical microscopy, scanning electron microscopy and XRD tester. The results show that as the carrier gas flow rate is increased from 500 L/h to 700 L/h, the powder deposition efficiency initially increases and then decreases. The solidification types of the two coatings consist of planar grains, cellular grains, columnar dendritic grains, and equiaxed grains, and with γ-Ni, M₂₃C₆, and Ni₃B phases. The microstructure refinement is most prominent when using a carrier gas flow rate of 600 L/h. The corrosion resistance increases initially, then decreases with the increase of carrier gas flow rate, and the coating produced with 600 L/h carrier gas flow rate has the best corrosion resistance.

Key words: Ni-based laser clad coating, Y₂O₃, numerical simulation, microstructure, corrosion resistance

中图分类号:

TG174.4

李云峰, 王嘉圣, 石岩, 姜广君, 唐术锋, 何晓东. 载气流量对激光熔覆添加Y₂O₃的镍基涂层组织和耐腐蚀性的影响[J]. 金属热处理, 2024, 49(2): 281-290.

Li Yunfeng, Wang Jiasheng, Shi Yan, Jiang Guangjun, Tang Shufeng, He Xiaodong. Influence of carrier gas flow rate on microstructure and corrosion resistance of laser clad Ni-based coatings with Y₂O₃[J]. Heat Treatment of Metals, 2024, 49(2): 281-290.

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载气流量对激光熔覆添加Y₂O₃的镍基涂层组织和耐腐蚀性的影响

Influence of carrier gas flow rate on microstructure and corrosion resistance of laser clad Ni-based coatings with Y₂O₃

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