Effect of Nb-V Microalloying on Microstructures and Mechanical Properties of Medium Carbon Non-Quenched and Tempered Steel

查看全文 作　　者：CHENG Hui-jing 1,WANG Fu-ming 1,LI Chang-rong 2,ZHANG Bo 1,XIA Yun-jin 1 (1.School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083;2.School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083)

出　　处：《Journal of Iron and Steel Research(International)》索引2011年第18卷第S1期,共6页

摘　　要：Based on optical microscope(OM),transmission electron microscope(TEM) and mechanical performance measurement,the microstructures and mechanical properties of Nb-V micro-alloying non-quenched and tempered steels have been studied.The results showed that the microstructure consists of ferrite and pearlite,in which there exists a lot of intragranular ferrite.Niobium carbide is the main form of carbonitrides,Nb-enriched carbonitrides refine grains,V-enriched carbonitrides have precipitation strengthening effect,which promotes the toughness of the studied steel.The mechanical properties for steels 1,2 and 3 have met the standards required by high load automobile crankshaft,in which the comprehensive property for No.2 is the best. 关键词：non-quenched and tempered steel Nb-V MICROALLOYING STRENGTH and toughness-enhanced mechanism

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Effect of Nb-V Microalloying on Microstructures and Mechanical Properties of Medium Carbon Non-Quenched and Tempered Steel

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