TA2钛合金真空感应碳氮共渗组织及耐磨损和耐腐蚀性能

通过真空感应碳氮共渗技术对纯钛合金(TA2)在900 ℃下进行表面改性处理,并研究了经过碳氮共渗处理后TA2钛合金表面强化层的组织结构、耐磨损及腐蚀性能。结果表明:经900 ℃碳氮共渗处理后,TA2钛合金表面生成了一层以C_0.3N_0.7Ti为主的复合层;表层的显微硬度高达2236 HV0.25,相较于未经碳氮共渗处理的试样提高了约4.4倍;碳氮共渗后试样表现出典型的氧化轻微磨损特征。在模拟体液(SBF)溶液中,碳氮共渗TA2钛合金试样的腐蚀电位向正移动,自腐蚀电流密度明显降低,耐蚀性提高。

Microstructure,wear and corrosion resistant properties of TA2 titanium alloy after vacuum induction carbonitriding

Pure titanium alloy(TA2)was modified by vacuum induction carbonitriding at 900℃,and the microstructure,wear and corrosion resistance properties of the surface strengthening layer of TA2 titanium alloy after carbonitriding were studied.The results show that a composite layer of C_0.3N_0.7Ti is formed on the surface of TA2 titanium alloy after carbonitriding at 900℃,the microhardness of the surface layer is as high as 2236 HV0.25,which is about 4.4 times higher than that of the specimen without carbonitriding.After carbonitriding,the specimen shows typical mild oxidation wear characteristics.In addition,in simulated body fluid(SBF)solution,corrosion potential of the TA2 titanium alloy after carbonitriding moves forward,the self-corrosion current density decreases obviously and the corrosion resistance improves.