摘要
利用Gleeble-1500热模拟机研究了变形量和冷却速度2个工艺参数对X70针状铁素体管线钢中M/A岛状组织的形貌、尺寸及分布的影响,结果表明,在保证再结晶区合适变形量基础上,提高未再结晶区的变形量,或在合理范围内提高冷却速度,都可以均匀、细化M/A岛组织。最后,结合现场实际,给出了获得理想M/A岛组织的变形量和冷却速度的范围。
The influence of deformation amount and cooling rate on the structure of Martensite/Austenite （M/ A） islands of X70 acicular ferrite pipeline steels was investigated by Gleeble--1500 thermo mechanical simulator, The morphology, size and distribution of M/A islands was observed. Experimental results show that structures of M/A islands are homogenized and refined under the conditions of appropriately increasing the de- formation amount in non--recrystallization region on basis of rational deformation amount in recrystallization region and cooling rate after deformation, respectively. Finally, according to the situation of practical production, rational deformation amount and cooling rate were given to obtain ideal structure of M/A islands.
出处
《轧钢》
2007年第4期7-10,共4页
Steel Rolling
关键词
X70管线钢
针状铁素体
M/A岛
变形量
冷却速度
X70 pipeline steel
acicular ferrite
martensite/austenite islands
deformation amount
cooling rate
