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首页> 外文期刊>Journal of Materials Engineering and Performance >Tribological Performance of M50-Ag-TiC Self-Lubricating Composites at Elevated Temperature
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Tribological Performance of M50-Ag-TiC Self-Lubricating Composites at Elevated Temperature

机译：升高温度下M50-AG-TIC自润滑复合材料的摩擦学性能

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摘要

M50 steel is widely used in aero-engine bearings and other high-temperature bearings. However, the poor wear of M50 steel resistance restrains its further applications. In this paper, the sliding tribological behaviors of M50 steel, M50-Ag composites (MAC) and M50-Ag-TiC composites (MATC) against Si3N4 ball were investigated from 150 to 600 A degrees C at 15 N-0.2 m/s. MATC showed better tribological properties in comparison with M50 and MAC. Especially at 450 A degrees C, MATC obtained the lowest friction coefficient of 0.15 and smallest wear rate of 1.3 x 10(-5) mm(3) N-1 m(-1). The excellent tribological performance of MATC during the friction test was attributed to the continuous lubricating film containing lubricant Ag and reinforcement TiC, as well as the subsurface compacted layer that could well support the lubricating film to prevent it from being destroyed. At 600 A degrees C, because of the tribo-chemical reaction between Ag and Mo oxide during sliding process, the newly formed Ag2MoO4 lubricating film was well spread out on the friction surface, which could continuously improve the tribological behavior of MATC. This investigation was meaningful to improve the anti-friction and wear resistance of M50 matrix bearing over a wide temperature range.
机译：M50钢广泛用于航空发动机轴承和其他高温轴承。然而，M50钢耐磨损较差的耐磨性抑制了其进一步的应用。在本文中，在15n-0.2m / s的150至600℃下，研究了M50钢，M50-Ag复合材料（MAC）和M50-Ag复合材料（MATC）对Si3N4球的滑动摩擦学行为。与M50和MAC相比，MATC显示出更好的摩擦学特性。特别是在450℃下，MATC获得的最低摩擦系数为0.15，最小的磨损率为1.3×10（-5）mm（3）n-1m（-1）。在摩擦试验期间MATC的优异摩擦学性能归因于含有润滑剂AG和钢筋TIC的连续润滑膜，以及可以很好地支持润滑膜以防止其被破坏的地下压实层。在600℃下，由于在滑动过程中Ag和Mo氧化物之间的摩擦化学反应，新形成的Ag2moo4润滑膜在摩擦表面上展开，这可能不断改善MATC的摩擦学行为。本研究有意义，可以提高M50基质轴承在宽温度范围内的抗摩擦和耐磨性。

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