作　　者： ; ; ; ; ; ;

机构地区： 东北大学材料与冶金学院轧制技术及连轧自动化国家重点实验室

出　　处： 《钢铁》 2010年第9期77-81,共5页

摘　　要： 通过热轧试验,利用扫描电镜,TEM观察和EBSD技术等分析显微组织与力学性能之间的关系。研究结果表明：显微组织以GB＋AF组织为主,AF组织呈典型的长条针状;以块状形式转变的准多边形铁素体为主,内部含有大量位错,高位错密度形成位错胞,位错线上分布着细小的析出相,具有高强度和良好冲击韧性;大角度晶界占整个分析区域内晶界的88%,大角度晶界主要分布在30°~60°,对冲击韧性非常有利。 The relationship between microstructure and mechanical properties were investigated through hot-rolling tests,scanning electron microscopy,TEM observation and analysis of EBSD technology.The results show that GB＋AF are the primary microstructures,and AF is typical of long needle-like structure.the quasi-polygonal ferrite transformed from massive ferrite is the main structure,containing a lot of interior dislocation and further forming the high dislocation density of dislocations cell,and distributing small precipitates in dislocation lines with high strength and good impact toughness.The wide-angle grain boundary is about 88% of the total grain boundary observed,wide-angle grain boundary are mainly distributed in 30°-60°,which is very beneficial to toughness.

关 键 词： 管线钢 针状铁素体 控轧控冷

领　　域： [金属学及工艺] [一般工业技术] [金属学及工艺]