Y_(2)O_(3)增强TC4合金焊激光熔覆仿真及微观组织性能研究  

Simulation and microstructure of Y_(2)O_(3) enhanced TC4 alloy welding laser cladding

作　　者：魏家帅 石明全 WEI Jiashuai;SHI Mingquan(Research Institute of Applied Technology,Zhejiang Chinese Academy of Sciences,Jiaxing 314022,CHN;School of Civil Engineering,Hunan University,Changsha 410082,CHN;Chongqing Institute of Green and Intelligent Technology,Chinese Academy of Sciences,Chongqing 401122,CHN)

机构地区：[1]浙江中科应用技术研究院,浙江嘉兴314022 [2]湖南大学土木工程学院,湖南长沙410082 [3]中国科学院重庆绿色智能技术研究院,重庆401122

出　　处：《制造技术与机床》2025年第2期90-98,共9页Manufacturing Technology & Machine Tool

基　　金：浙江省技术创新引导专项项目“MCP功能层材料沉积设备及智能焊接技术研发”(ZJKJT-2023-02)。

摘　　要：TC4(Ti-6Al-4V)钛合金因其低密度、高比强度和良好的加工性能,在航空航天、航海石油和国防等领域得到了广泛应用。然而,其硬度低、耐磨性差,限制了其在摩擦工况下的使用。基于涂层与TC4基材的相容性及基体对生成相的润湿性原理,在TC4表面制备了Ti基稀土激光熔覆层,研究了Y_(2)O_(3)对涂层显微硬度和耐磨性能的影响。通过COMSOL软件模拟单道和多道TC4粉末熔覆动态过程,结合试验研究温度变化与熔覆层厚度,阐明了熔覆机理并验证了模型的正确性。对熔覆层的组织结构和物相组成进行了详细分析,利用显微维氏硬度计测量熔覆层硬度,结果表明,Y_(2)O_(3)增加显著减少了气泡和裂纹数量,促进了组织细化。为TC4表面激光熔覆涂层的微观组织调控、成形质量提供了试验和理论依据。TC4(Ti-6Al-4V)titanium alloy has been widely used in aerospace,marine petroleum and national defense because of its low density,high specific strength and good processability.However,its low hardness and poor wear resistance limit its use under friction conditions.Based on the compatibility between the coating and TC4 substrate and the wettability of the substrate to the generated phase,Ti-based rare earth laser cladding layer was prepared on TC4 surface and the influence of rare earth oxides on the microhardness and wear resistance of the coating.The dynamic process of single-pass and multi-pass TC4 powder cladding is simulated by COMSOL software,and the temperature change and cladding layer thickness are studied by experiments,to clarify the cladding mechanism and verify the correctness of the model.The microstructure and phase composition of the cladding layer were analyzed,and a Vickers microhardness tester was used to measure the hardness of the cladding layer.The addition of Y_(2)O_(3) significantly reduced the occurrence of pores and cracks,further promoting microstructure refinement.This study provides experimental and theoretical basis for microstructure control and forming quality of laser cladding coating on TC4 surface.

关 键 词：TC4钛合金 Y_(2)O_(3)增强 激光熔覆 微观组织 耐磨性能 显微硬度 COMSOL仿真 组织细化 

分 类 号：TG442[金属学及工艺—焊接]