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%Y_(2)O_(3)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、M_(23)C_(6)和Ni_(3)B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。
A 5 kW CO_(2)laser was used for the preparation of pure Ni45 alloy coating and Ni45+0.4wt%Y_(2)O_(3)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 withγ⁃Ni,M_(23)C_(6),and Ni_(3)B 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.
作者
李云峰
王嘉圣
石岩
姜广君
唐术锋
何晓东
Li Yunfeng;Wang Jiasheng;Shi Yan;Jiang Guangjun;Tang Shufeng;He Xiaodong(College of Mechanical Engineering,Inner Mongolia University of Technology,Hohhot Inner Mongolia 010051,China;School of Mechanical and Electric Engineering,Changchun University of Science and Technology,Changchun Jilin 130022,China;National Base of International Science and Technology Cooperation for Optics,Changchun Jilin 130022,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2024年第2期281-290,共10页
Heat Treatment of Metals
基金
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)。
