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本文研究了在干滑动摩擦情况下,GCr15钢与YG8硬质合金对磨时的摩擦系数与法向载荷及滑动速度的关系。结果表明,摩擦系数是随着法向载荷和滑动速度的增加而降低。根据磨损表面发生的变化和磨损表面温度计算,作者认为法向载荷和滑动速度的增加使闪温增高,从而导致了摩擦磨损表面的局部熔化,即形成了边界润滑,故此摩擦系数降低,而且在较高的载荷和滑动速度条件下,不同显微组织材料的摩擦系数之差减小。
In this paper, the relationship between the friction coefficient and the normal load and sliding speed of GCr15 steel and YG8 cemented carbide on the condition of dry sliding friction was studied. The results show that the friction coefficient decreases with the increase of normal load and sliding velocity. According to the change of wear surface and wear surface temperature, the authors think that the increase of normal load and sliding speed make the flash temperature increase, which leads to the local melting of the friction and wear surface, that is, the boundary lubrication is formed, so the friction coefficient decreases. Under the condition of higher load and sliding speed, the difference of the friction coefficient of different microstructure materials decreases.