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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.
In order to study the influence of the oxide film on the frictional wear and corrosion resistance of the infiltrated layer after quenching-polishing-quenching of 14Cr12Ni2WMoVNb steel, the microstructure, X-ray diffraction, Wear tester and electrochemical workstation.The results show that the influence of oxide film on the tribological properties at room temperature is related to the load size.When the friction time is 4 min, the load is small (50 N) , The oxide film can reduce the coefficient of friction and the volumetric wear rate; when the load is large (100 N), the oxide film can not reduce the volumetric wear rate when the oxide film is damaged. The oxide film can obviously improve the corrosion resistance of the layer. Polarization curve has a clear passivation zone with a pitting potential of -13 mV. After the oxide film is removed for 12 h, there is a wide range of corrosion area on the surface of the oxide film. After the sample containing the oxide film is eroded for 48 h by salt spray, Only a large area of corrosion occurred.