A: SKF aircraft engine bearing new materials

one M50NiL bearing steel, aviation engine high speed and high temperature has higher request to the rolling bearing, M50NiL in addition to the fracture toughness increased, compared with other high temperature hardening bearing material, the microstructure and fatigue strength are also very good. One reason is that no large particles in the M50iL carbide, therefore, this kind of steel is not sensitive to carbide caused by fatigue crack. two Ceramic materials for high efficiency of aircraft gas turbine engine, engine working conditions of the main shaft bearing requirement is very high, SKF developed high-performance ceramic material, under the condition of high temperature above 1100 ℃, the ceramic material, hot pressing silicon nitride or silicon nitride (such as pressure 文中介绍) 。 Silicon nitride is an ideal material, because it has good high temperature strength and hardness, and favorable relationship between strength/weight. 3. Solid lubricant due to the calculation of future aircraft engine operating temperature is very high, to this kind of work effectively under the condition of bearing lubrication, it is well known that when temperature more than liquid lubricant is allowed to limit, can be used to contain various chemical elements of oxide and sulfide and fluoride solid compound for the high temperature resistant, stable performance. SKF silicon nitride by high temperature and additives of lubricating graphite, its surface can form a layer of chemical film rubbing, it can reduce the friction coefficient of silicon nitride, to minimize the friction temperature rise.