Huang Zhiping, Zhang Haohan, Ni Jing, Yang Lingqi, Feng Kai
School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China.
Materials (Basel). 2023 Jul 18;16(14):5074. doi: 10.3390/ma16145074.
YG8 is a common cemented carbide material with excellent mechanical properties and mechanical properties, so it is widely used in the actual industry. However, due to the active chemical properties and strong affinity of tungsten alloy steel, it is easy to produce bonding and peeling in application, resulting in an unstable process and short service life. In order to control and reduce the surface wear of YG8 cemented carbide, groove-textured surface (GS) and flocking surface (FS) were prepared on smooth surface (SS). The friction characteristics of the samples were studied under different applied load conditions. The results show that the average friction coefficient of SS, GS and FS is inversely proportional to the load in dry/oil environment. Compared with SS, FS exhibits the lowest friction coefficient, which is reduced by 30.78% (dry friction) and 13.13% (oil lubrication). FS effectively improves the tooth jump phenomenon of the sample and the amplitude of the friction coefficient, friction force and load, and has the best anti-friction characteristics. At the same time, the FS with the fastest contact angle drop at any time also showed excellent wetting ability, and the wear rate decreased by an order of magnitude. The implantation of fibers in the groove inhibits the spalling and furrow of wear track, which is attributed to the effect of fibers on damage repair. In the friction process, FS increases the content of the O element and induces the formation of oxides. The friction mechanism is mainly chemical wear. The excellent tribological properties of FS have a good guiding significance and theoretical support for improving the tribological properties of high hardness material surfaces.
YG8是一种具有优异力学性能的常用硬质合金材料，因此在实际工业中得到广泛应用。然而，由于钨合金钢化学性质活泼且亲和力强，在应用中容易产生粘结和剥落现象，导致加工过程不稳定且使用寿命短。为了控制和减少YG8硬质合金的表面磨损，在光滑表面（SS）上制备了沟槽纹理表面（GS）和植绒表面（FS）。研究了不同加载条件下样品的摩擦特性。结果表明，在干/油环境中，SS、GS和FS的平均摩擦系数与载荷成反比。与SS相比，FS的摩擦系数最低，干摩擦时降低了30.78%，油润滑时降低了13.13%。FS有效改善了样品的跳齿现象以及摩擦系数、摩擦力和载荷的波动幅度，具有最佳的减摩特性。同时，FS在任何时刻接触角下降最快，也表现出优异的润湿性，磨损率降低了一个数量级。沟槽中纤维的植入抑制了磨损轨迹的剥落和犁沟，这归因于纤维对损伤修复的作用。在摩擦过程中，FS增加了O元素的含量并诱导了氧化物的形成。摩擦机制主要是化学磨损。FS优异的摩擦学性能对提高高硬度材料表面的摩擦学性能具有良好的指导意义和理论支撑。
