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

发布时间：2019-01-24 16:59

【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.
[Abstract]:In order to study the effect of QPQ (quenching, polishing and quenching) treatment on the friction, wear and corrosion properties of 14Cr12Ni2WMoVNb steel at room temperature, metallography, X-ray diffraction analysis, scanning electron microscope, energy spectrum analysis and scratch tester were used. The samples were characterized by friction and wear tester and electrochemical workstation. The results show that the effect of oxide film on the tribological properties of the layer at room temperature is related to the load. When the friction time is 4 min and the load is smaller (50 N), the friction coefficient and volume wear rate can be reduced, but when the load is larger (100N), the volume wear rate can not be reduced when the oxide film is destroyed. The oxidation film can obviously improve the corrosion resistance of the coating. The polarization curve of the sample containing oxide film has obvious passivation zone, and the pitting potential is -13 mV, to remove the oxidation film sample. After 12 h of salt spray corrosion, there is a wide range of corrosion area on the surface of the sample. However, the corrosion occurred in a large area after 48 h of salt spray corrosion of the sample containing oxide film.
【作者单位】：北京科技大学新材料技术研究院;北京市腐蚀、磨蚀与表面技术重点实验室;广东省新材料研究所;重庆建设工业(集团)有限责任公司制造技术部;
【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)
【分类号】：TG174.4;TJ203

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