快速加热条件下BH钢再结晶规律  

Recrystallization Mechanism of BH Steel Under Rapid Heating

作　　者：徐德超[1] 李俊[1,2] 孟庆格[2] 刘沿东[1] 李佩[3] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004 [2]宝钢集团中央研究院,上海201900 [3]上海交通大学材料科学与工程学院,上海200240

出　　处：《钢铁》2013年第10期63-69,共7页Iron and Steel

基　　金："十二五"国家科技支撑计划资助项目(2011BAE13B03)

摘　　要：通过Gleeble-3500热模拟试验机以及运用金相、显微硬度、EBSD技术等研究方法,研究了不同加热速率对BH钢再结晶退火组织和织构演变的影响。结果表明:再结晶温度随加热速率的提高而升高。加热速率的提高,缩短了BH钢完成再结晶所需时间。快速加热条件下,BH钢再结晶晶粒得到细化,再结晶织构组分强度降低。EBSD分析发现:提高加热速率,再结晶完成后,再结晶织构仍以有利于深冲性能的管状γ织构为主。再结晶结束后,升高温度和增加保温时间有助于{111}织构的发展。在780℃保温一定时间的条件下,低加热速率形成以{111}<112>组分为主的再结晶织构,而快加热速率下{111}<110>织构组分得到一定的发展,γ织构强度分布更加均匀,有利于BH钢的成型性能。The development of recrystallization and recrystallization texture after annealing by normal heating rate and rapid heating rate in cold-rolled BH steel was investigated using Gleeble;3500, microhardness tester, metallurgical microscopy, electron back scattered diffraction： orientation imaging microscopy （EBSD： OIM）. The results show that the recrystallization temperature and the velocity of recrystallization increase with increasing heating rate. In addition, increasing heating rate decreased recrystallized grain sizes. The strong ）＇ texture can be obtained under conditions of rapid or normal heating rate. It is helpful for { 111 } （112） texture to raise temperature and increase soaking time after the recrystallization. The { 111 } （110） texture increased after soaking certain time at 780 ℃ with the heating rate increasing, the γ texture get more homogenous.

关 键 词：加热速率 再结晶织构 BH钢 EBSD 

分 类 号：TG142.1[一般工业技术—材料科学与工程]