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在销盘试验机上对Ｓｉ３Ｎ４／钢摩擦副的摩擦磨损性能进行了研究。选用的速度及载荷变化范围分别为０．８～３．２ｍ／ｓ和５８．８～２３５．２Ｎ。在干摩擦和水润滑条件下，摩擦系数和陶瓷磨损率随速度、载荷均有不同程度的增大，但用油润滑时，较高速度下，Ｓｉ３Ｎ４磨损率略有减小。较低速度下（＜１．６ｍ／ｓ）水对Ｓｉ３Ｎ４／钢摩擦副的摩擦性能无明显改善，速度大于１．６ｍ／ｓ时，水使Ｓｉ３Ｎ４／钢摩擦副摩擦系数降低。同干摩擦相比，水的润滑作用减小了Ｓｉ３Ｎ４的磨损率。润滑油对Ｓｉ３Ｎ４／钢摩擦副的摩擦和磨损性能的改善均很显著。表面分析结果表明，Ｓｉ３Ｎ４／钢摩擦副中Ｓｉ３Ｎ４的磨损主要由粘着和微断裂引起，摩擦面温度升高会加速元素的扩散，从而加剧粘着磨损。高载荷下微断裂磨损也十分严重。对水润滑条件下的Ｓｉ３Ｎ４磨损表面进行Ｘ射线衍射分析发现有ＦｅＳｉＯ３，ＦｅＯ等摩擦化学产物生成。这些摩擦化学产物对抑制摩擦面粘着，减小Ｓｉ３Ｎ４磨损起到了一定的作用
The friction and wear properties of Si3N4 / steel friction pair were studied on the pin plate tester. The selected speed and load range of 0.8 ~ 3.2m / s and 58.8 ~ 235.2N. Under the conditions of dry friction and water lubrication, the friction coefficient and the wear rate of ceramics increase with different degrees of speed and load. However, the wear rate of Si3N4 slightly decreases at higher speed when lubricated with oil. Under low speed (<1.6m / s), the friction performance of Si3N4 / steel pair was not improved obviously. When the velocity was more than 1.6m / s, the friction coefficient of Si3N4 / steel pair was decreased by water. Compared with dry friction, water lubrication reduces the wear rate of Si3N4. Lubricants on Si3N4 / steel friction pairs and friction and wear performance improvement are significant. The surface analysis results show that the wear of Si3N4 in Si3N4 / steel friction pair is mainly caused by the adhesion and micro-fracture. The increase of the temperature of the friction surface will accelerate the diffusion of the elements, thus aggravating the adhesion wear. Micro-fracture under high load wear is also very serious. X-ray diffraction analysis of the wear surface of Si3N4 under water-lubricated conditions shows that there are tribochemical products such as FeSiO3 and FeO. These tribochemical products play a role in inhibiting the adhesion of friction surfaces and reducing the wear of Si3N4