工业纯钛表面渗铝及其耐摩擦磨损性能研究

    Research on Surface Aluminization of Industrial Pure Titanium and Its Friction and Wear Resistance

    • 摘要: 对TA2工业纯钛进行包埋渗铝工艺试验。为获得最佳性能渗铝层的工艺参数,同时减少试验次数,以Al粉含量、保温时间、保温温度为因素,设计了9组正交试验方案。利用SEM、EDS、XRD对渗铝层的截面微观形貌和相组成进行分析,采用显微维氏硬度计和摩擦磨损试验机对渗铝层的硬度和摩擦性能进行检测,研究了不同包埋渗铝工艺参数对渗铝层结构和性能的影响。结果表明:当渗剂中Al粉含量为15%,保温时间为4 h,保温温度为900℃时,渗层耐磨性表现最好,平均摩系数最小,硬度大幅提高。渗源Al粉含量对渗层的耐磨性能影响最大,保温温度次之。

       

      Abstract: Embedded aluminum infiltration process tests of industrial pure titanium TA2 were carried out. In order to obtain the best process parameters and reduce the number of tests, 9 orthogonal test schemes were designed with Al powder content, holding time and holding temperature as the factors. SEM, EDS and XRD were used to analyze the section micromorphology and phase composition of the aluminum infiltration layers, and micro-Vickers hardness tester and friction and wear testing machine were used to detect the hardness and tribological properties of the aluminum infiltration layers. The influence of different embedded aluminum infiltration process parameters on the structure and performance of aluminum infiltration layers was studied. The results show that when Al powder content in the infiltrant is 15%, the insulation time is 4 h,and the insulation temperature is 900 ℃, the wear resistance of the infiltration layer is best, the average friction coefficient is the minimum, and the hardness increases obviously. The Al powder content in the infiltrant has the greatest impact on the wear resistance of the infiltration layer, followed by the holding temperature.

       

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