摘要
采用热膨胀法结合金相分析建立了 0 9CuPCrNiMoNb耐候钢未变形和变形奥氏体的连续冷却转变曲线 (CCT曲线 )。试验钢变形奥氏体的CCT曲线具有较宽的铁素体析出区可作为“速度窗口” ;同时 ,在铁素体 贝氏体区与珠光体转变区之间有一半开口型奥氏体稳定区 ,可作为“卷取窗口” ,以上特点为试验钢热轧双相化提供了条件。根据变形奥氏体的CCT曲线提出了试验钢热轧双相化工艺 ,并在热模拟试验机上进行了热轧双相化模拟 。
The continuous cooling transformation (CCT) diagrams of austenite undeformed and deformed were constructed by means of a combined method of dilatometry and metallography for 09CuPCrNiMoNb weathering steel. The CCT diagram of deformed austenite is characterized by a bay between the ferrite-pearlite transformation and the bainitic transformation, but this bay is of the half-open-window type. At the other hand, the ferrite transformation range is very wide, which provides a wide velocity window. Both the special features of the deformed austenite CCT diagram provide a basic condition for production of hot-rolled dual phase steel. Based on the CCT diagram of deformed austenite of experiment steel, the technology of hot rolled dual-phase treatment was established and simulated on a thermal simulation testing machine. Dual-phase microstructure of ferrite and martensite with some bainite phase was obtained.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2004年第4期37-40,共4页
Transactions of Materials and Heat Treatment
基金
河北省科学技术研究与发展计划资助项目(0 1 2 1 2 1 1 75D)
