Microstructure and wear resistance of highchromium cast iron containing niobium

查看全文 作　　者：Zhang [1,2]Zhiguo;Yang [1,2]Chengkai;Zhang [1,2]Peng;Li [1,2]Wei

机构地区：[1]Department of Materials Science and Engineering, Jinan University;[2]Engineering Research Center for Wear Resistant Materials, Jinan University

出　　处：《China Foundry》索引2014年第11卷第3期,共6页

基　　金：financially supported by the Science and Technology Plan Project of Guangdong Province(Nos.2010A080407002,2011A080802003,2011A091000035,2012B090600030);the Fundamental Research Funds for the Central Universities(No.21612105) 摘　　要：In the paper, the effect of niobium addition on the microstructure, mechanical properties and wear resistance of high chromium cast iron has been studied. The results show that the microstructure of the heattreated alloys is composed of M7C3 and M23C6 types primary carbide, eutectic carbide, secondary carbide and a matrix of martensite and retained austenite. NbC particles appear both inside and on the edge of the primary carbides. The hardness of the studied alloys maintains around 66 HRC, not significantly affected by the Nb content within the selected range of 0.48%-0.74%. The impact toughness of the alloys increases with increasing niobium content. The wear resistance of the specimens presents little variation in spite of the increase of Nb content under a light load of 40 N. However, when heavier loads of 70 and 100 N are applied, the wear resistance increases with increasing Nb content. 关键词：high chromium cast irons NbC,hardness impact TOUGHNESS wear resistance

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Microstructure and wear resistance of highchromium cast iron containing niobium

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