摘要
采用热模拟技术和显微分析方法,对X100管线钢在连续冷却转变下的显微组织的变化规律进行了研究。通过X100管线钢CCT曲线的建立和组织分析表明：当冷却速度低于0.2℃/s时,组织类型以多边形铁素体（PF）为主。在0.5-10℃/s的冷却速度范围,主体组织为准多边形铁素体（QF）和粒状铁素体（GF）。当冷却速度大于20℃/s,组织以贝氏体铁素体（BF）为主。大于50℃/s的冷却速度,将形成马氏体（M）。
Microstructure in a continuously cooled X100 high strength pipeline steel was investigated by means of heat simulation technique on a Gleeble-1500 simulator,optical microssope（OM）and transmission electron microscopy（TEM）.The results show that the microstructure of X100 high strength pipeline steel is mainly composed of polygonal ferrite（PF）when the cooling rate is lower than（0.2 ℃/s.） Quasi-polygonal ferrite and granular ferrite（QF＋GF）prevails in the steel with the cooling rate of 0.5-10 ℃/s.When the cooling rate is higher than 20 ℃/s,the microstructure of X100 pipeline steel mainly consists of bainitic ferrite（BF）.Martensite（M）forms in the steel with the cooling rate higher than 50 ℃/s.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2010年第1期62-66,共5页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金项目(50874090)
关键词
X100管线钢
显微组织
连续冷却转变
X100 pipeline steel microstructure continuous cooling transformation
