CAJ | 학술논문

采用粉末冶金技术制备Ni-Cr/hBN自润滑复合材料，研究hBN含量及摩擦载荷对Ni-Cr/hBN复合材料的性能及摩擦磨损行为的影响。结果表明：随hBN含量增大，Ni-Cr/hBN复合材料的密度、抗弯强度和摩擦系数均逐渐减小。当载荷为20 N时，Ni-Cr/hBN复合材料的磨损速率随hBN含量的增大而减小；当载荷为60 N和100 N时，磨损速率随hBN含量增大呈先减小后增大的趋势。当hBN含量不变时，磨损速率随载荷增大而逐渐增大。通过探讨Ni-Cr/hBN自润滑复合材料的润滑与磨损机理可知，材料的摩擦系数取决于hBN的含量，而磨损速率与材料的力学性能有关。当hBN含量为9%（质量分数），摩擦载荷为60 N时，Ni-Cr/hBN自润滑复合材料具有最佳的摩擦学综合性能。
채용분말야금기술제비Ni-Cr/hBN자윤활복합재료，연구hBN함량급마찰재하대Ni-Cr/hBN복합재료적성능급마찰마손행위적영향。결과표명：수hBN함량증대，Ni-Cr/hBN복합재료적밀도、항만강도화마찰계수균축점감소。당재하위20 N시，Ni-Cr/hBN복합재료적마손속솔수hBN함량적증대이감소；당재하위60 N화100 N시，마손속솔수hBN함량증대정선감소후증대적추세。당hBN함량불변시，마손속솔수재하증대이축점증대。통과탐토Ni-Cr/hBN자윤활복합재료적윤활여마손궤리가지，재료적마찰계수취결우hBN적함량，이마손속솔여재료적역학성능유관。당hBN함량위9%（질량분수），마찰재하위60 N시，Ni-Cr/hBN자윤활복합재료구유최가적마찰학종합성능。
The Ni-Cr/hBN self-lubricating composites are prepared by the powder metallurgy technology. The influences of the hBN contents and working load on the properties and tribological performance of the Ni-Cr/hBN composite are investigated. The results show that the density, bending strength and friction coefficient of the Ni-Cr/hBN composites decrease with the increasing of the hBN contents. Under the working load of 20 N, the wear rate of the Ni-Cr/hBN composite decreases with the increasing of hBN contents. However, under the loading of 60 N and 100 N, the wear rate declines first, and then increases with the increasing of hBN contents. The wear rate increases with the increasing of working load, when the hBN content remains constant. According to the lubrication and wear mechanism of the Ni-Cr/hBN self-lubricating composite, the friction coefficient depends on the hBN content, and the wear rate is related with the mechanical properties. The best tribological properties are obtained when the hBN content is 9%( mass fraction) and working load is 60 N.