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采用双辉离子渗技术对Ti6Al4V钛合金表面渗Nb,利用扫描电子显微镜、X射线衍射仪、显微硬度计、磨损试验机、电化学测试系统研究钛合金表面离子渗Nb合金化层的形态、结构、力学性能、摩擦学性能和电化学腐蚀性能,并探讨渗Nb改性处理对钛合金在3.5%NaCl溶液中腐蚀磨损行为的影响。结果表明,渗Nb工艺参数对合金化层的形态、结构和性能影响显著,高浓度渗Nb合金化改性层表现出良好的强化效果,显著地改善了Ti6Al4V合金的抗大气环境和抗NaCl溶液腐蚀磨损性能。Ti6Al4V合金基材和渗Nb层的耐磨性能在NaCl溶液中优于大气环境,其原因归于溶液的润滑作用和试样的良好耐腐蚀性能。
The surface of Ti6Al4V titanium alloy was infiltrated with Nb by double hull iontophoresis. The morphology of the iontophobized Nb alloying layer on titanium alloy was studied by scanning electron microscopy, X-ray diffraction, microhardness tester, wear tester and electrochemical test system. Structure, mechanical properties, tribological properties and electrochemical corrosion properties. The effects of infiltration Nb on the corrosion and wear behavior of titanium alloy in 3.5% NaCl solution were also investigated. The results show that the infiltration Nb process parameters have a significant effect on the morphology, structure and properties of the alloying layer. The high-strength infiltration Nb alloying modified layer shows good strengthening effect, significantly improving the anti-atmospheric environment and anti-NaCl solution of Ti6Al4V alloy Corrosion wear performance. The wear resistance of Ti6Al4V alloy substrate and infiltration Nb layer is superior to that of the atmosphere in NaCl solution. The reason for this is attributed to the lubricating effect of the solution and the good corrosion resistance of the sample.