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采用销盘式摩擦副,在干滑动摩擦条件下,结合OM、SEM结果,探讨稀土添加量和滑移速度对合金摩擦磨损行为的影响,结果表明,稀土添加量为0.6%时,铝合金的耐磨性达到较好状态,而在相同的稀土添加量条件下,随着滑移速度的增大,磨损率有所增大,而摩擦系数有所减小。不同实验条件表现出的磨损机制也不同,滑移速度恒定200 r·min-1时,ADC12基体和0.9%稀土铝合金主要为疲劳磨损、剥层磨损以及热软化磨损,0.6%稀土铝合金表现为稳定的磨粒磨损为主,而0.3%添加量的合金则为三体磨粒磨损。固定稀土含量为0.6%时,在滑移速度较小的100 r·min-1前提下,稀土合金以剥离磨损为主要磨损机制,150 r·min-1条件下则以三体磨损为主要磨损机制。
The friction and wear behavior of the alloy was investigated by using the pin-plate type friction pair under the condition of dry and sliding friction combined with OM and SEM results. The results show that when the rare earth content is 0.6% Wear resistance reached a good state, and with the same addition of rare earth conditions, with the slip speed increases, the wear rate increases, while the friction coefficient decreases. Different experimental conditions show different wear mechanisms. At a constant sliding speed of 200 r · min-1, the fatigue strength, wear and heat-softening wear of the ADC12 matrix and 0.9% For the stable abrasive wear-based, and 0.3% of the added amount of the alloy is three-body abrasive wear. When the content of fixed rare earth is 0.6%, under the premise of 100 r · min-1 with small slip velocity, the wear mechanism of rare earth alloy is the main wear mechanism. Under the condition of 150 r · min-1, the three-body wear is the main wear mechanism.