王涛,王长宏,朱磊,王浩,张莹.不同基面角度对激光熔覆Ni25/WC涂层耐磨性的影响[J].表面技术,2022,51(12):371-379.
WANG Tao,WANG Chang-hong,ZHU Lei,WANG Hao,ZHANG Ying.Effect of Different Substrate Angles on Wear Resistance of Laser Cladding Ni25/WC Coating[J].Surface Technology,2022,51(12):371-379 |
| 不同基面角度对激光熔覆Ni25/WC涂层耐磨性的影响 |
| Effect of Different Substrate Angles on Wear Resistance of Laser Cladding Ni25/WC Coating |
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| DOI：10.16490/j.cnki.issn.1001-3660.2022.12.038 |
| 中文关键词: 激光熔覆 镍基合金 复合涂层 基面角度 摩擦磨损 |
| 英文关键词:laser cladding nickel base alloy composite coating substrate angles friction and wear |
| 基金项目:国家自然科学基金(52172360);中国民航大学研究生科研创新项目(2021YJS034) |
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| Author | Institution |
| WANG Tao | Civil Aviation Laser Manufacturing Technology Institute, Tianjin 300300, china ;College of Aeronautical Engineering, Tianjin 300300, china |
| WANG Chang-hong | Civil Aviation Laser Manufacturing Technology Institute, Tianjin 300300, china ;College of Aeronautical Engineering, Tianjin 300300, china |
| ZHU Lei | Civil Aviation Laser Manufacturing Technology Institute, Tianjin 300300, china ;College of Aeronautical Engineering, Tianjin 300300, china |
| WANG Hao | Civil Aviation Laser Manufacturing Technology Institute, Tianjin 300300, china ;Engineering Technology Training Center, Civil Aviation University of China, Tianjin 300300, china |
| ZHANG Ying | Civil Aviation Laser Manufacturing Technology Institute, Tianjin 300300, china ;College of Aeronautical Engineering, Tianjin 300300, china |
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| 中文摘要: |
| 目的 为实现模具曲面或斜面区域修复，研究不同基面角度对激光熔覆Ni25/WC涂层形貌和耐磨性的影响。方法 采用激光熔覆技术在不同角度的基体表面制备了Ni25/WC修复涂层，利用X射线衍射仪(XRD)、维氏硬度计、扫描电镜(SEM)和摩擦磨损试验机，分析和研究了不同角度对涂层截面形貌、物相组成、微观组织、显微硬度和摩擦磨损性能的影响及机理。结果 熔覆过程中，基体表面为90°时，在重力作用下，粉末流向下偏移，部分粉末无法进入熔池，使得单道涂层厚度降低，熔池内的金属熔液受重力影响向下滑落，激光熔覆快速凝固的特点使得熔液在滑落前凝固，导致涂层形心向下侧偏移。在重力、运载气体及空气阻力的作用下，混合粉末中密度更大的WC颗粒向下偏移量更大，未进入熔池的大尺寸的WC颗粒更多，使得涂层中WC颗粒含量降低。WC颗粒含量影响涂层的磨损形式，0°涂层主要磨损形式为犁削作用和黏着磨损，90°涂层主要发生了磨粒磨损。结论 不同角度单道涂层的截面形状和厚度不同，0°涂层呈现两侧较为对称的半圆或半椭圆，涂层厚度更大，90°涂层的形心随重力向下侧偏移，涂层厚度明显减小;涂层的物相种类相同，均由FeNi3、Ni2B及WC等相组成;0°涂层显微硬度平均值为446.67HV0.2，90°涂层显微硬度平均值为456.13HV0.2。0°涂层磨损率为0.002 6 mg/m，90°涂层磨损率为0.008 mg/m，0°涂层耐磨性优于90°涂层，磨损机制不同是耐磨性产生差异的主要原因。 |
| 英文摘要: |
| It is an excellent surface repair technology by laser cladding, which has the advantages of small heat input, high bonding strength with substrate and high repair efficiency. To realize the repair of the inclined mold surface area and obtain stable quality repair coating, the influence of different substrate surface angles on the morphology and wear resistance of the laser cladding coating was studied. |
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