Warm compacted NbC particulate reinforced iron-base composite(Ⅱ)--Microstructure and properties  

作　　者：李元元 肖志瑜 倪东惠 夏伟 陈维平 

出　　处：《中国有色金属学会会刊：英文版》2002年第4期664-668,共5页Transactions of Nonferrous Metals Society of China

基　　金：Project ( 5 0 135 0 2 0 )supportedbytheNationalNaturalScienceFoundationofChina ;Project ( 2 0 0 1AA3370 10 )bytheNation alAdvancedTechnologyResearchandDevelopmentCommitteeofChina ;Project ( [2 0 0 0 ]No .1)byFoundationofExcellentPersonalfor 2 1s

摘　　要：Effects of different sintering temperature and sintering time on the relative density of the sintered compacts were studied to obtain the optimal sintering parameters for the fabrication of NbC parti culate reinforced iron base composite. With optimal sintering temperature of 1?280?℃ and sintering time of 80?min, wear resisting, high density NbC particulate reinforced iron base composites can be obtained using warm compaction powder metallurgy. The microstructure, relative density, mechanical properties and tribological behaviors of the sintered composites were studied. The results indicate that the mechanical properties of the sintered compacts were closely related to the sintered density. The iron base composite materials with different combinations of mechanical properties and tribological behaviors were developed for different applications. One of the developed composite, which contains 10%NbC, possesses a high strength of 815?MPa with a remarkable friction and wear behaviors. The other developed composite, which contains 15%NbC, possesses a lesser strength of 515?MPa but with excellent friction and wear behaviors.Effects of different sintering temperature and sintering time on the relative density of the sintered compacts were studied to obtain the optimal sintering parameters for the fabrication of NbC parti culate reinforced iron base composite. With optimal sintering temperature of 1?280?℃ and sintering time of 80?min, wear resisting, high density NbC particulate reinforced iron base composites can be obtained using warm compaction powder metallurgy. The microstructure, relative density, mechanical properties and tribological behaviors of the sintered composites were studied. The results indicate that the mechanical properties of the sintered compacts were closely related to the sintered density. The iron base composite materials with different combinations of mechanical properties and tribological behaviors were developed for different applications. One of the developed composite, which contains 10%NbC, possesses a high strength of 815?MPa with a remarkable friction and wear behaviors. The other developed composite, which contains 15%NbC, possesses a lesser strength of 515?MPa but with excellent friction and wear behaviors.

关 键 词：MMCS 显微组织 碳化铌 颗粒增强 铁基复合材料 性质 

分 类 号：TB33[一般工业技术—材料科学与工程]