微合金化低碳钢的动态应变时效行为  

Dynamic strain ageing behavior of micro-alloyed low carbon steel

作　　者：蔡大勇[1,2] 董海锋[1] 廖波[1] 关玉佐[2] 陈礼斌[2] 史东日[2] 

机构地区：[1]亚稳材料制备科学与技术国家重点实验室,燕山大学,河北秦皇岛066004 [2]唐山钢铁股份有限公司,河北唐山063016

出　　处：《材料热处理学报》2008年第5期86-88,共3页Transactions of Materials and Heat Treatment

基　　金：河北省自然科学基金资助项目(E2007000374)

摘　　要：采用Gleeble3500热模拟试验机研究5种微合金化低碳钢的动态应变时效行为。结果表明,在应变量0.1时,试验中的A（0.011C-0.45Cr-0.054Ti）钢、C（0.013C-0.54Cr-0.096Ti-0.004B）钢及E（0.007C-0.31Cr-0.068Ti）钢的流变应力在300-400℃出现一个峰值,在试验给定的温度和应变速率范围内,试验钢出现了明显的动态应变时效现象。与之对比,B（0.011C-0.50Cr-0.085Ti）钢及D（0.013C-0.37Cr-0.086Ti）钢的流变应力随着形变温度的升高而单调下降,没有发现明显的动态应变时效现象。可见,适量微合金化元素Cr、Ti、B的加入,可使低碳钢的动态应变时效效应大大降低,应变速率敏感性减小。Dynamic strain ageing behavior of the micro-alloyed low carbon steels was studied on a Gleeble 3500 simulator.The results show that a peak stress exists at 300～400 ℃ for the experimental steel A（0.011C-0.45Cr-0.054Ti）,C（0.013C-0.54Cr-0.096Ti-0.004B） and E（0.007C-0.31Cr-0.068Ti）,which indicates that obvious dynamic strain ageing occurs.By contrast,the flow stress decresses monotonously with the increase of deformation temperature,and evident dynamic strain ageing phenomenon is not observed for the steel B（0.011C-0.50Cr-0.085Ti） and steel D（0.013C-0.37Cr-0.086Ti）.It can be conclued that the dynamic strain ageing behvior of low carbon steel can be effectively suppressed through the adding of appropriate amount of Cr,Ti and B elements.

关 键 词：低碳钢 铁素体轧制 微合金化 动态应变时效 

分 类 号：TG142.4[一般工业技术—材料科学与工程]