氧化膜对14Cr12Ni2WMoVNb钢QPQ渗层的室温摩擦磨损和腐蚀性能的影响  

Effect of oxide film on tribological properties at room temperature and corrosion performance of QPQ nitride layers on 14Cr12Ni2WMoVNb steel

作　　者：张乐[1,2] 张津[1,2] 余强[1] 李洪 连勇[1,2] 高文[1,2] 任青松[4] ZHANG Le ZHANG Jin YU Qiang LI Hong LIAN Yong GAO Wen REN Qing-song(Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China Beijing Key Laboratory for Corrosion, Erosion and Surface Technology, Beijing 100083, China Guangdong Institute of New Materials, Guangzhou 510650, China Manufacturing Technology Department, Chongqing Jianshe Industry （Group） Co. Ltd, Chongqing 400054, China)

机构地区：[1]北京科技大学新材料技术研究院,北京100083 [2]北京市腐蚀,磨蚀与表面技术重点实验室,北京100083 [3]广东省新材料研究所,广州510650 [4]重庆建设工业(集团)有限责任公司制造技术部,重庆400054

出　　处：《工程科学学报》2017年第7期1047-1054,共8页Chinese Journal of Engineering

基　　金：北京市腐蚀;磨蚀与表面技术重点实验室和北京市教委共建资助项目(SYS100080419)

摘　　要：为了研究14Cr12Ni2WMoVNb钢QPQ(淬火—抛光—淬火)处理后的氧化膜对渗层室温摩擦磨损和腐蚀性能的影响,利用金相、X射线衍射分析、扫描电镜、能谱分析、划痕仪、摩擦磨损试验机和电化学工作站对试样进行了表征.结果表明:氧化膜对渗层室温摩擦学性能的影响与载荷大小有关.在摩擦时间均为4 min情况下,载荷较小(50 N)时,氧化膜可以降低摩擦系数和体积磨损率;载荷较大(100 N)时,氧化膜被破坏无法降低体积磨损率.氧化膜可明显提高渗层的耐腐蚀性能.含氧化膜试样的极化曲线有明显的钝化区,点蚀电位为-13 mV,去除氧化膜试样在盐雾腐蚀12 h后表面有大范围的腐蚀区域,而含氧化膜试样盐雾腐蚀48 h后才有大区域腐蚀发生.This study analyzed the effects of the oxide film of 14Cr12Ni2WMoVNb steel with QPQ（quench—polish—quench）treatment on tribological properties at room temperature and corrosion resistance of the layers.The microstructure and properties of specimens with and without oxide film were studied by metallographic analysis,X-ray diffraction（XRD）,scanning electron microscopy（SEM）,energy dispersive spectrometry（EDS）,a scratch tester,friction and wear tester,and at an electrochemical workstation.Results show that the effects of the oxide film on tribological properties of the layers are related to load.When the friction time is 4 min and the load is low（50 N）,the friction coefficient of the oxide film and the volume wear rate are effectively decreased.However,with a friction time of 4 min and a high load（100 N）,the oxide film is destroyed,there is thus no reduction in the volume wear rate.The study also shows that the oxide film obviously improves the corrosion resistance of the layers.The Tafel polarization curve of the specimen with oxide film has an obvious passivation region,and the pitting potential is -13 mV.The surface of the specimen with the oxide film removed has a wide area of corrosion after salt spray corrosion for 12 h,whereas a large area of corrosion only occurs after 48 h of salt spray for the specimen with the oxide film.

关 键 词：14Cr12Ni2WMoVNb钢 氧化膜 摩擦学性能 腐蚀性能 

分 类 号：TG156.8[金属学及工艺—热处理]