摘要
采用Gleeble-1500D型热模拟机测定了不同含铌量低碳微合金钢在不同冷却速度下,过冷奥氏体连续冷却相变点,分析观察了显微组织,测定了其显微硬度.得出:在同一冷却速度下,随着含铌量的提高,过冷奥氏体连续冷却相变点降低,容易出现条片状贝氏体铁素体,显微硬度提高;在相同成分下,随着冷却速度的增加,含铌钢中铁素体越来越细小,由等轴状大块铁素体组织向条片状贝氏体铁素体转变.
The phase transfomation temperature was determined by Gleeblc-1500 thermo-mechanical simulator with different Nb content for the low carbon and low alloy steel. The microstructure and hardness were studied, showing that under the same cooling rate, the austenite phase transformation temperature decreased with increasing Nb content,while the microstructure was long slip bainite ferrite and its hardness was also increasing. Under the same Nb content, the austenite phase transformation temperature decreased with increasing the cooling rate, and the microstructure became tiny fine while the big equiax ferrite grain changed into long lath bainite ferrite.
出处
《包头钢铁学院学报》
2005年第3期254-257,共4页
Journal of Baotou University of Iron and Steel Technology
基金
内蒙古高校科学研究基金资助项目(NJ04025)
关键词
NB
低碳微合金钢
贝氏体铁素体
Nb
the low carbon and low alloy steel
bainite ferrite
作者简介
赵莉萍（1964-）,女,内蒙古包头人,内蒙古科技大学教授.
