Effect of Nb-V Microalloying on Microstructures and Mechanical Properties of Medium Carbon Non-quenched and Tempered Steel
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 2＃ is the best.
Non-quenched and tempered steel Nb-V microalloying strength and toughness-enhanced mechanism
CHENG Hui-jing WANG Fu-ming LI Changrong ZHANG Bo XIA Yun-jin
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Be School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 1
国际会议
The 6th International Conference on High Strength Low Alloy Steels(第六届高强度低合金钢国际会议HSLA Steels2011)
北京
英文
845-851
2011-05-31（万方平台首次上网日期，不代表论文的发表时间）