摘要
为改善深部钻具关键易损构件的耐磨性能,采用超音速火焰喷涂(HVOF)技术在35CrMo钢基体上制备了WC10Co4Cr涂层,利用扫描电子显微镜(SEM)、X射线能谱仪(EDS)、X射线衍射仪(XRD)、显微硬度仪、维氏硬度计和摩擦磨损试验机测试分析了涂层的微观结构、力学性能和摩擦磨损行为。结果表明:利用HVOF技术制备的WC10Co4Cr涂层具有致密的微观结构和优异的力学性能,其孔隙率为1.3±0.1%,显微硬度为1392±45 HV0.3,断裂韧性为7.11±0.10 MPa·m^1/2;与35CrMo钢基体相比,涂层具有更加优异的耐磨损性能,并且随着滑动速度的增加,WC10Co4Cr涂层的摩擦系数下降、磨损率增大;WC10Co4Cr涂层的磨损失效机制主要包括磨粒磨损、粘着磨损和疲劳磨损。
In order to improve wear resistance of the key wearable parts of deep drilling tools,high velocity oxygen fuel spray(HVOF)technology was used to prepare WC10Co4Cr coating on 35CrMo steel substrate.The scanning electron microscope(SEM),Xray energy dispersive spectrometer(EDS),Xray diffractometer(XRD),micro-hardness tester,Vickers hardness tester and friction and wear tester were used to analyze the microstructure,mechanical properties and friction and wear behavior of the coating.The results showed that the WC10Co4Cr coating prepared by HVOF technology had a dense microstructure and excellent mechanical properties.The porosity of the coating was 1.3±0.1%,with the microhardness of 1392±45 HV0.3,and the fracture toughness of 7.11±0.10 MPa·m^1/2.Compared with 35CrMo steel substrate,the coating has more excellent wear resistance,and with the increase of sliding speed,the friction coefficient of WC10Co4Cr coating decreases and the wear rate increases;The wear failure mechanism of coating mainly includes abrasive wear,adhesive wear and fatigue wear.
作者
周永宽
康嘉杰
岳文
付志强
梁健
朱丽娜
王成彪
ZHOU Yongkuan;KANG Jiajie;YUE Wen;FU Zhiqiang;LIANG Jian;ZHU Lina;WANG Chengbiao(School of Engineering and Technology, China University of Geosciences, Beijing 100083, China;Institute of Exploration Techniques, CAGS, Langfang Hebei 065000, China;Zhengzhou Institute, China University of Geosciences 〈Beijing〉, Zhengzhou Henan 451283, China;Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, CAGS, Zhengzhou Henan 450006, China)
出处
《探矿工程（岩土钻掘工程）》
2020年第4期72-79,共8页
Exploration Engineering:Rock & Soil Drilling and Tunneling
基金
国家重点研发计划项目“5000米智能地质钻探技术装备研发及应用示范”课题三“高性能薄壁绳索取心钻杆研制”(编号:2018YFC0603403)
国家自然科学基金面上项目“深海钻具腐蚀冲蚀磨损失效规律及其防护机理研究”(编号:41772389)
装备预研领域基金重点项目“空间用超润滑固体薄膜制备技术”(编号:61409230603)
装备预研教育部联合基金青年人才基金项目“发动机缸体强化延寿涂层设计制造技术”(编号:6141A02033120)。
