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| Effect of Vanadium on Performance and Microstructure of LowMo FireResistant Steel |
| DANG Ying1,PAN Fusheng1,CHEN Jie1,2, ZUO Rulin1,LI Cong1,2 |
| 1. College of Materials Science and Engineering, Chongqing University , Chongqing 400044，China ; 2. Technical center, Panzhihua Iron and Steel (Group) Co., Panzhihua 617000, Sichuan, China |
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Abstract The microstructure of experimental hot rolled low Mo fireresistant steels containing different V were investigated by means of scanning electron microscope and transmission electron microscope. The results revealed that the microstructure of hot rolled steels consists of proeutectoid ferrite and granular structure/granular bainite.Ｍost of precipitates are dissolved in ferrite,and a large number of fine V(C.N) are precipitated after reheated at 600 ℃,which contributes to a increase of hightemperature strength by precipitation strengthening.
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Received: 01 January 1900
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2007, Vol. 42 
