Thermodynamics and Kinetics Study on Improving the Microstructure of High Chromium Cast Iron by Multi-alloying

摘要：

　　The effects of multi-alloyings(V,Ti and Nb)on carbides precipitation and as-cast microstructure of eutectic high chromium cast iron containing 2.8 wt.%carbon and 31.0wt.%chromium were investigated.The results showed that with the increase in the amount of alloy elements,the cast microstructure of 2.8C-31Cr high chromium cast iron changed gradually from refinement to coarsening and the total volume fraction of carbides decreased.When the addition of alloy was0.4V-0.40Ti-0.40Nb-0.35Mo,the solidification microstructure was largely improved,the distribution of carbides was reasonably uniform.The existence form of strong carbides forming elements(V,Ti,Nb)and the reasons of microstructure change were investigated from thermodynamics and kinetics considerations.

关键词： carbides solidification microstructure precipitation

作者: Ma You-ping Li Xiu-lan Wang Da-cheng Wang Xiang-bo Song Shao-feng Dang Xiao-ming

作者单位: School of Metallurgic Engineering,Xian University of Architecture & Technology,Xian,710055,China The Technology Center of Rainbow Group,Xian,710000,China The Science Institute,Air Force Engineering University,Xian,710051,China

会议类型: 国际会议

会议名称: The 7th International Conference on Electromagnetic Processing of Materials(第七届冶金与材料电磁过程国际大会)

会议地点: 北京

会议语种:英文

页码: 1-7

在线出版日期: 2012-10-22（万方平台首次上网日期，不代表论文的发表时间）