(西安建筑科技大學(xué) 冶金工程學(xué)院，西安 710055)
摘 要: 采用脈沖滲氧的方法在不同溫度、時(shí)間下對(duì)工業(yè)純鈦進(jìn)行滲氧處理，以改善其在應(yīng)用過(guò)程中的耐磨損性能。采用 X 射線衍射儀(XRD)、掃描電鏡(SEM)、納米壓痕儀和摩擦磨損試驗(yàn)機(jī)分別對(duì)試樣表層的特征峰強(qiáng)度、形貌特征、壓痕硬度、表面摩擦因數(shù)及磨痕截面積進(jìn)行測(cè)試。結(jié)果表明：經(jīng)脈沖滲氧處理在工業(yè)純鈦試樣表面形成氧化層和氧擴(kuò)滲層；與連續(xù)滲氧試樣和原始試樣相比，700 ℃脈沖滲氧6 h試樣的表面硬度最大，為15.39 GPa，約為同等參數(shù)下連續(xù)滲氧試樣的1.7倍和原始試樣的7.3倍；800 ℃脈沖滲氧4.5 h試樣的摩擦因數(shù)和磨痕截面積最小，分別為0.24和317.44 μm2.。試樣的黏著磨損被明顯削弱，耐磨損性能得到提高。
關(guān)鍵字: 工業(yè)純鈦；脈沖滲氧；氧化層；氧擴(kuò)滲層；摩擦；磨損
（College of Metallurgy Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China）
Abstract:In order to improve the wear resistance of industrial pure titanium in the process of application, the method of pulse oxidation was used under different temperatures and time. X-ray diffractometer (XRD), scanning electron microscope (SEM), nano indentation tester and friction and wear tester were used to test the characteristic peak strength, morphology characteristics, indentation hardness, surface friction coefficient and wear scar cross-sectional area of the wear mark. The results show that oxidation layer and oxygen diffusion layer form on the surface of industrial pure titanium samples by pulse oxidation. Compared with the continuous oxidation samples and the original samples, the surface hardness of the pulse oxidation sample at 700 ℃ for 6 h is the largest, being 15.39 GPa, which is about 1.7 times of that of the continuous oxidation sample, 7.3 times of that of the original sample. The friction coefficient and wear scar cross-section area of the pulse oxidation sample at 800 ℃ for 4.5 h are the smallest, which are 0.24 and 317.44 μm2, respectively. The adhesive wear of the samples is significantly weakened and the wear resistance is improved.
Key words: industrial pure titanium; pulse oxidation; oxidation layer; oxygen diffusion layer; friction; wear
