【摘要】 用化学液相沉积方法,在高强度灰铸铁活塞环表面实现了NbC覆层.盘销摩擦磨损试验表明,无论在有无润滑的情况时,NbC镀层表面要比镀Cr表面或铸铁原始表面具有更高的耐磨性,可以延长活塞环使用寿命,而NbC镀层与铸铁之间低的磨擦系数可使S195柴油机摩擦损失降低0.35kW,降低比油耗9～5g/(kW·h).更多还原

【Abstract】 By employing Toyota diffusion coating process, the NbC-coating on the substrate of high strength grey cast iron has been obtained in this paper. The friction and wear tests show that the NbC-coating, in comparison with uncoated grey cast iron or electro-deposited Cr, has an excellent wear resistance and a lower frictional coefficient under the conditions of both nonlubrication and lubrication. The application of NbC-coating on the surface of piston ring in S195 diesel engine exhibits that the frictional loss between piston ring and cylinder liner reduces 0.35 kW and the specific fuel consumption cuts down 9～15g/(kW.h).更多还原