| 激光熔覆中熵合金铁钴镍涂层的工艺及组织性能 |
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| 引用本文： | 邓景泉.激光熔覆中熵合金铁钴镍涂层的工艺及组织性能[J].安阳工学院学报,2022,21(2):26-31. |
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| 作者姓名： | 邓景泉 |
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| 作者单位： | 滁州学院 机械工程系,安徽 滁州 239000 |
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| 基金项目： | 硅材料国家重点实验室2019年开放课题。 |
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| 摘 要： | 用高能球磨制备等原子比铁(Fe)钴(Co)镍(Ni)铁镍钴复合粉体,用激光熔覆方法制备复合粉铁镍钴体合金涂层。用OM、HV、XRD、SEM、EDS、SVET等对复合粉体及熔覆合金层进行了组织表征及性能测试。结果表明,复合粉体经3 h高能球磨后均匀细化,平均尺寸从35μm到15μm左右,镍晶格有一定畸变,有新相Co3Fe7产生;用优化后的激光熔覆工艺激光功率2000 W,激光扫描速度10 mm/s,保护Ar气流速度12 L/min制备中熵熔覆合金FeCoNi涂层;XRD、SEM、EDS表明熔覆层合金是单一的面心立方(FCC)相,Fe,Co,Ni成分均匀分布,没有金属间化合物产生;熔覆层的HV约是243,在0.5 mol/L氯化钠溶液中熔覆层的SVET表明耐腐蚀性能好。
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| 关 键 词： | 中熵合金 铁钴镍 激光熔覆 涂层 |
Preparation Technology,Structure and Properties of Medium-entropy FeCoNi Alloy Coating Prepared by Laser Cladding |
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| DENG Jingquan.Preparation Technology,Structure and Properties of Medium-entropy FeCoNi Alloy Coating Prepared by Laser Cladding[J].Journal of Anyang Institute of Technology,2022,21(2):26-31. |
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| Authors: | DENG Jingquan |
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| Institution: | (Mechanical Engineering Department,Chuzhou University,Chuzhou 239000,China) |
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| Abstract: | The FeCoNi composite powders in equal atomic ratio were made by way of high-energy mechanical milling process.The composite powders were deposited on low carbon steel substrate by laser cladding forming FeCoNi medium-entropy alloy coating.The microstructures of the composite powders and laser-cladding coating were characterized using OM,SEM,EDS,XRD.The HV,SVET of the coating were measured.The experimental results show that the composite powders mix uniformly,average size of the powder from 35μm to 15μm or so,with new phase Co3Fe7.When preparation technology is laser power 1500W,scanning rate 10mm/s,air delivery 12L/min,the composite powders form FeCoNi alloy coating with good appearance and structure.The coating exhibits a microstructure of single face center cubic(FCC)phase with Fe,Co,Ni contents uniformly distributed.Its HV is about 243.The SVET of the coating shows the coating has better corrosion resistance than Stain Steel 304 in 0.5mol/LNaCl(aq). |
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| Keywords: | medium-entropy laser cladding FeCoNi coating |
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