摘要
本文利用热模拟试验机对高性能耐火耐候建筑用钢WGJ510C2的奥氏体连续冷却转变(CCT)图进行了测定和分析。结果表明:相对于共析钢而言,由于含碳量的降低及多元微合金元素的复合加入,WGJ510C2钢的相变临界点大幅降低,奥氏体的稳定性增强,贝氏体的淬透性增大;在冷却速度小于2.5℃/s时,可以得到F+P+B组织,在冷却速度介于2.5℃/s^25℃/s之间时,可以得到F+B组织。
Thermo-simulation was used to analyze the continuous cooling transformation （CCT） diagram of high grade of fire-resistant and weatherability construction steel WGJ510C2. It shows that WGJ510C2 steel has low critical phase transformation point, stable Austenite and enough hardenability of bainite. Comparing with eutectoid steel, the microstructure of F＋P＋B was observed when the cooling rates down to 2. 5 ℃/s, while the microstructure of F＋B was obtained when the cooling rates ranging from 2.5℃/s to 25 ℃/s.
出处
《物理测试》
CAS
2006年第4期1-2,14,共3页
Physics Examination and Testing
关键词
耐火性能
热模拟
CCT图
fire-resistant
thermo-simulation
CCT diagram
