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研究了3个主要摩擦磨损参数载荷、振幅和频率对Inconel625镍基合金在常温常压下摩擦磨损性能的影响,对摩擦系数和磨损程度进行计算和分析,对磨痕表面形貌进行了观察,并用EDS和XPS分析了磨痕表面的化学成份和相组成,探讨了损伤机理.结果表明:在3个特征参量中,频率对摩擦系数的影响最大,平均摩擦系数随载荷增大略有减小,随振幅增大略有增大,但随频率增大而显著增大;磨损程度随振幅、载荷的增大而加剧;在磨痕不同区域展现出不同的损伤机制:中心磨损区的主要损伤机制是黏着和剥层,滑动损伤区的主要损伤机制是磨粒磨损,而在边缘区则为基体和磨屑的挤压变形;磨痕氧化层的主要组成是铁的氧化物Fe2O3和Fe3O4或FeO,有少量铬和镍的氧化物NiO、Ni2O3和Cr2O3,存在基体元素镍单质.
The effects of load, amplitude and frequency on the friction and wear properties of Inconel625 nickel base alloy under normal temperature and pressure were studied. The friction coefficient and wear degree were calculated and analyzed. The surface morphology of the wear scar was observed. The chemical composition and phase composition of wear scar surface were analyzed by EDS and XPS, and the damage mechanism was discussed.The results showed that the frequency had the most significant influence on the friction coefficient and the average friction coefficient slightly decreased with the increase of load, With the increase of the amplitude slightly increased, but with the increase of frequency increased significantly; degree of wear increased with the amplitude, load aggravating; wear scar in different regions showed different damage mechanisms: the main damage mechanism of the central wear zone is Adhesion and delamination, the main damage mechanism of sliding damage zone is abrasive wear, while in the marginal zone is the matrix and wear debris extrusion deformation; the main component of wear scar oxide is iron oxide Fe2O3 and Fe3O4 or FeO, A small amount of chromium and nickel oxide NiO, Ni2O3 and Cr2O3, there are elements of the base element of nickel.