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在高应力滚滑动(滑动率约为0.5%,5%,10%)条件下,利用自制的磨损试验机研究了高钒高速钢的摩擦磨损性能,并利用电子显微镜分析了失效行为。结果表明:高应力滚滑动接触使高钒高速钢中的奥氏体转化为马氏体,并使马氏体发生严重的碎化。滑动率对高钒高速钢的摩擦磨损行为有显著影响。当滑动率为5.12%时,摩擦系数最高,滑动率升高或降低均使摩擦系数降低。随着滑动率增加,高钒高速钢的磨损率增加,其磨损失效方式逐渐由疲劳磨损为主转变为滑动磨损为主。
The friction and wear properties of high vanadium high speed steel were studied by self-made wear tester under the conditions of high stress rolling (sliding rate of about 0.5%, 5%, 10%), and the failure behavior was analyzed by electron microscope. The results show that the high-stress rolling contact makes the austenite in the high-vanadium high-speed steel transform to martensite and the martensite is severely shredded. The sliding rate has a significant effect on the friction and wear behavior of high vanadium high speed steel. When the sliding rate is 5.12%, the friction coefficient is the highest, and the friction coefficient decreases with the increase or decrease of the sliding rate. With the increase of sliding rate, the wear rate of high vanadium high speed steel increases, and the wear failure mode gradually changes from fatigue wear to sliding wear.