發(fā)布時間：2018-09-09 08:19

【摘要】：在純鈦相變溫度下,利用等電位空心陰極輝光放電技術在純鈦表面進行無氫滲碳處理。分別利用掃描電子顯微鏡、能譜儀和X射線衍射儀對試樣的表面形貌、成分分布和相組成進行分析;利用摩擦磨損試驗儀對試樣的摩擦學性能進行研究;利用電化學工作站,在室溫靜態(tài)條件下對試樣在3.5%Na Cl水溶液中的耐蝕性能進行研究。結果顯示,經(jīng)過無氫滲碳處理,在純鈦表面形成了高硬度的合金改性層,改性層的最大厚度是7.5μm,最大HV_(0.2)顯微硬度為12.98 GPa,是基體硬度的5.43倍。由于表面硬度的提高,試樣的耐磨性能也顯著增強,試樣的平均摩擦系數(shù)是0.312,較原始試樣的0.746明顯降低。在3.5%NaC l水溶液中,試樣的最低年腐蝕速率是原始試樣的1/11。因此,在保證基體力學性能的前提下,試樣的耐磨耐蝕性能明顯提高。
[Abstract]:Hydrogen free Carburizing was carried out on the surface of pure titanium by using the constant potential hollow cathode glow discharge technique at the phase change temperature of pure titanium. The surface morphology, composition distribution and phase composition of the sample were analyzed by scanning electron microscope, energy spectrometer and X-ray diffractometer, the tribological properties of the sample were studied by friction and wear tester, and the electrochemical workstation was used to study the tribological properties of the sample. The corrosion resistance of samples in 3.5%Na Cl aqueous solution was studied at room temperature. The results show that after hydrogen-free Carburizing, a high hardness alloy modified layer is formed on the surface of pure titanium. The maximum thickness of the modified layer is 7.5 渭 m and the maximum HV_ _ (0.2) microhardness is 12.98 GPa, which is 5.43 times of the matrix hardness. Because of the increase of surface hardness, the wear resistance of the sample is also significantly enhanced. The average friction coefficient of the sample is 0.312, which is obviously lower than that of the original sample (0.746). In 3.5%NaC l aqueous solution, the lowest annual corrosion rate of the sample is 1 / 11 of the original sample. Therefore, on the premise of ensuring the mechanical properties of the matrix, the wear resistance and corrosion resistance of the samples are obviously improved.
【作者單位】： 北京石油化工學院;北京科技大學;北京化工大學;
【基金】：Beijing Institute of Petrochemical Technology Breeding Project of Outstanding Academic Leaders(BIPT-BPOAL-2013)
【分類號】：TG156.81

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