X80管线钢和管线钢管的组织细化  

GRAIN REFINEMENT OF X80 PIPELINE STEEL AND PIPELINE STEEL PIPE

作　　者：霍向东[1] 李烈军[2] 黎剑锋[1] 刘世泽[1] 黄克坚[1] 

机构地区：[1]番禺珠江钢管有限公司,广东广州511450 [2]华南理工大学机械与汽车工程学院,广东广州510641

出　　处：《冶金丛刊》2014年第2期30-34,共5页Metallurgical Collections

摘　　要：为满足X80管线钢和管线钢管的高强韧性要求,采取的组织细化的方法包括:反复再结晶细化奥氏体晶粒;结合Nb微合金化技术的未再结晶区控制轧制;添加Mo推迟高温相变,采用加速冷却,获得针状铁素体组织;利用TiN等第二相粒子阻止奥氏体晶粒长大;控制钢中夹杂物的组成、尺寸和分布,诱导晶内针状铁素体形核,得到细小的HAZ组织。In order to achieve high strength and good toughness in X80 pipeline steel,the present paper introduces following methods for grain refinement：1.Austenite grain refinement through repeated recrystallization.2.Controlling rolling at unrecrystallizaiton region,combined with niobium micro-alloying technology.3.Achieving acicular ferrite microstructure through accelerated cooling and molybdenum addition for inhibiting pearlite transformation.4.Inhibiting austenite grain growth through titanium nitride pinning grain boundary.5.Controlling the composition,size and distribution of inclusions,which induce nucleation of intra-granular ferrite for obtaining fine microstructure in heat affected zone.

关 键 词：组织细化 控轧控冷 针状铁素体 析出物 氧化物冶金 

分 类 号：TG335.1[金属学及工艺—金属压力加工] TG335.12