摘要
钛合金在超深井钻探领域具有广阔的应用前景。为提高钛合金钻杆表面耐磨性,采用激光熔覆技术制备了WC梯度耐磨涂层。使用OM、SEM、EMPA、XRD、硬度机、摩擦磨损试验机及白光干涉扫描仪研究了梯度耐磨涂层的显微组织、相组成、元素分布、力学性能及摩擦磨损性能。结果表明,梯度耐磨涂层物相主要由α-Ti、WC、TiC、Ti_(x)W_((1-x))固溶体及少量Y_(2)O_(3)构成。梯度涂层层间及底层与基材存在数10μm的互扩散层,并在层间形成了冶金结合,提高了涂层的结合性能。梯度耐磨涂层顶层的耐磨性相较于TC4基材提高了1.45倍,TC4及梯度耐磨涂层的磨损机制为黏着磨损与磨粒磨损。梯度涂层耐磨性相较于基材有提高。
Titanium alloys exhibit promising application prospects in ultra-deep well drilling.To enhance the surface wear resistance of titanium alloy drill pipes,WC gradient wear-resistant coatings were fabricated using laser cladding technology.The microstructure,phase composition,elemental distribution,mechanical properties,and tribological performance of the gradient coatings were systematically investigated through OM,SEM,EMPA,XRD,hardness tester,friction and wear tester and white light interferometry.Results demonstrated that the gradient coat-ings primarily consisted ofα-Ti,WC,TiC,Ti_(x)W_((1-x))solid solutions,and minor Y_(2)O_(3).There were interdiffusion layers with a thickness of sev-41 eral tens of micrometers between the gradient coating layers and the bottom layer and substrate,and the metallurgical bonding was formed be-tween the layers,which improved the bonding property of the coating.Meanwhile,the top layer of the gradient coating exhibited 1.45 times higher wear resistance compared to TC4 substrate.Both TC4 substrate and gradient coatings displayed wear mechanisms dominated by adhesive wear and abrasive wear,while the wear resistance of gradient coatings was higher than that of the substrate.
作者
傅硕
许爱军
徐雅欣
朱丽娟
娄丽艳
李文亚
FU Shuo;XU Aijun;XU Yaxin;ZHU Lijuan;LOU Liyan;LI Wenya(Shaanxi Key Laboratory of Friction Welding Technologies,State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an 710072,China;Changsha 5712 Aircraft Industry Co.,Ltd.,Changsha 410114,China;State Key Laboratory for Service Behavior and Structural Safety of Petroleum Pipes and Equipment Materials,China Petroleum Engineering Materials Research Institute Co.,Ltd.,Xi’an 710065,China;State Key Laboratory of Metal Material Strength,School of Materials Science and Engineering,Xi’an Jiaotong University,Xi’an 710049,China)
出处
《材料保护》
2025年第4期40-47,共8页
Materials Protection
基金
国家重点研发计划(2021YFB3200500)
西北工业大学凝固国家重点实验室项目(2021-TZ-01)
西北工业大学分析测试中心项目(No.2021T013)。
