18Ni(300)钢高速干滑动摩擦磨损特性研究

利用销盘高速干滑动摩擦磨损试验机,对18Ni(300)马氏体时效钢的摩擦磨损性能进行了研究,应用JSM-6390A型扫描电子显微镜和X-衍射方法对摩擦磨损表面进行观察,表征其摩擦表面的微观形貌、摩擦磨损的磨屑以及由于摩擦产热而引起的氧化物,进而推断出磨损机制.结果表明:摩擦副的摩擦系数随载荷和速度的增加而下降;随着转速和载荷的增加,销表面氧化物逐渐由FeO转变为Fe_3O_4,其磨损机制由黏着磨损转变为严重的氧化磨损.

Friction and Wear Characteristics of 18Ni(300) Steel at High Speed Dry Sliding Condition

18Ni(300) Steel had exceptional strength and toughness, which were used in the field of aviation and aerospace. In this study, using a high-speed tribo-tester, tribological behaviors of 18Ni(300) steel were investigated under high speed dry sliding conditions. Morphologies of the worn surfaces and the debris were analyzed by scanning electron microscope and the oxides of worn surfaces caused by friction heat were detected by X-ray diffraction. The results show that:friction coefficient of frictional pair declined with increasing load and speed; With increasing speed and load, oxides on worn pin surface varied from FeO to Fe₃O₄ and the wear mechanism transited from adhesive wear into severe oxidation wear.