控制冷却对C-Mn钢力学性能的影响  

Effects of Control Cooling on Mechanical Properties of C-Mn Steel

作　　者：周晓光[1] 刘振宇[1] 吴迪[1] 王国栋[1] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2010年第3期362-365,共4页Journal of Northeastern University(Natural Science)

基　　金："十一五"国家科技支撑计划项目(2006BAE03A08);国家高技术研究发展计划项目(2007AA03Z504);中央高校基本科研业务资金资助项目(N090307002)

摘　　要：采用MMS-300热力模拟实验机研究了某C-Mn钢铁素体动态相变前冷却速度对相变前奥氏体晶粒尺寸、室温铁素体晶粒尺寸的影响规律,同时在实验轧机上对实验钢的传统工艺、低温控轧工艺、非低温控轧工艺+前段快冷工艺进行了试轧.结果表明:①随着相变前冷却速度的增加,奥氏体晶粒尺寸呈逐渐减小趋势;②随着相变前冷却速度的增加,室温铁素体晶粒尺寸呈细化趋势;③非低温控轧工艺+前段快冷工艺取得了与低温控轧工艺相当的力学性能,且具有相对较低的屈强比.The effects of cooling rate on both austenite grain size and ferrite grain size at room temperature before ferrite transformation were investigated on MMS-300 thermomechanical simulator with the specimens of a kind of C-Mn steel to which the trial rolling processes were done simultaneously on rolling mills with conventional low-temperature controlling and non-low temperature controlling plus forepart fast cooling technologies.Some results revealed that：① the austenite grain size decreases with the increasing cooling rate before ferrite transformation;②the ferrite grain size at room temperature becomes finer with the increasing cooling rate before ferrite transformation;③the excellent mechanical properties provided by the technology of non-low temperature controlling rolling plus forepart fast cooling are the same to that by the low-temperature rolling technology,but the former has lower yield/tensile ratio.

关 键 词：控制冷却 晶粒尺寸 铁素体相变 热轧 力学性能 

分 类 号：TG142.2[一般工业技术—材料科学与工程]