钒对低钼耐火钢组织及性能的影响
党莹1,潘复生1,陈杰1,2,左汝林1，李聪1,2
1. 重庆大学材料科学与工程学院， 重庆 400044；2. 攀枝花钢铁(集团)公司技术中心， 四川 攀枝花 617000
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
摘要 采用扫描、透射电镜对不同钒含量的低钼耐火钢的组织进行分析，确定出热轧状态的组织为先共析铁素体、粒状组织/粒状贝氏体。同时还发现V的析出物在热轧钢中主要固溶于铁素体基体内，600 ℃重新加热时以细小的V（C，N）弥散析出，从而起到高温析出强化的作用。
关键词 ：
耐火钢 ,
V ,
粒状组织/粒状贝氏体
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.
Key words ：
fireresistant steel
V
granular structure/granular bainite
收稿日期: 1900-01-01
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2007, Vol. 42 
