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对滑动速度与载荷在干摩擦下等离子喷涂Ｃｒ_２Ｏ_３与ＡＩＳＩＤ２钢相对滑动摩擦与磨损进行研究，其试验是在不同负荷且速度测试范围为０．１２５～８ｍ／ｓ下进行。试验结果表明，干摩擦时等离子喷涂Ｃｒ２Ｏ３涂层磨损随着负荷的增加．而增大，其次Ｃｒ２Ｏ３涂层在干摩擦滑动下出现一个最小磨损滑动速度（０．５ｍ／ｓ）和一个最大磨损滑动速度（３ｍ／ｓ）。文中分析了产生最低磨损速度和最高磨损速度的原因，提出了一个切向碰撞磨损模型。在速度为０．１２５～０．５ｍ／ｓ范围内，随着速度的增加，Ｃｒ２Ｏ３涂层的磨损减小，然后速度从０．５ｍ／ｓ到３ｍ／ｓ，磨损又急剧上升，随后又减小。磨损量的大变化对速度而言，在低速度时用粘着滑动来解释；在中速时用切线冲击效应来解释而在高速时用瞬现温度软化效应来解释。此外，Ｃｒ２Ｏ３涂层相对于ＡＩＳＩＤ２钢在干摩擦滑动下的机械磨损在抵速时是粘着滑动，在中速时是脆性断裂，而在高速时是粘着和脆性断裂的混合。
The sliding friction and wear of plasma sprayed Cr 2 O 3 and AISID 2 steel under dry friction with sliding speed and load were studied. The tests were carried out under different loads with a speed range of 0.125 ~ 8 m / s. The experimental results show that the wear resistance of plasma sprayed Cr2O3 coatings increases with load when dry friction is applied. While the Cr2O3 coating shows a minimum wear slip velocity (0.5 m / s) and a maximum wear slip velocity (3 m / s) under dry friction slip. In this paper, the causes of the lowest wear rate and the highest wear rate are analyzed. A tangential collision wear model is proposed. At speeds of 0.125-0.5 m / s, the wear of the Cr2O3 coating decreases with increasing speed, and then the wear rate increases sharply from 0.5 m / s to 3 m / s and then decreases again small. The large change in wear is explained by the stick-slip at low speeds for speed, by the tangent impact effect at medium speeds, and by the instantaneous temperature softening effect at high speeds. In addition, the mechanical wear of the Cr2O3 coating relative to AISID2 steel under dry friction slip is slip-on-stick when slip-on, brittle fracture at medium speed and mixture of sticky and brittle fracture at high speed.