| Q345FRE耐火钢SH-CCT曲线测定与分析 |
| |
| 引用本文： | 刘攀,王红鸿,鄢文泽,彭思远.Q345FRE耐火钢SH-CCT曲线测定与分析[J].金属热处理,2022,47(10):88-93. |
| |
| 作者姓名： | 刘攀 王红鸿 鄢文泽 彭思远 |
| |
| 作者单位： | 1.武汉科技大学 理学院, 湖北 武汉 430065;2.武汉科技大学 省部共建耐火材料与冶金国家重点实验室, 湖北 武汉 430081;3.武汉科技大学 高性能钢铁材料及其应用省部共建协同创新中心, 湖北 武汉 430081 |
| |
| 摘 要： | 利用Gleeble-3500试验机对Q345FRE耐火钢进行了焊接热模拟,结合膨胀法、杠杆法、金相分析与硬度测试,测得了Q345FRE耐火钢焊接热影响区在不同t8/5条件下的相变温度,并绘制了焊接热影响区连续冷却转变曲线(SH-CCT),研究了其焊接热影响区在不同t8/5条件下的组织变化规律。结果表明,当t8/5为3~80 s时,Q345FRE耐火钢热影响区组织为贝氏体;当t8/5为80~300 s时,其组织为贝氏体、铁素体和珠光体;当t8/5为300~600 s时,其组织为铁素体和珠光体。随着t8/5的增大,其焊接热影响区的组织硬度减小。为保持组织稳定性,Q345FRE耐火钢焊接线能量的适当选取范围为15~150 kJ/cm。
|
| 关 键 词： | Q345FRE耐火钢 SH-CCT曲线 显微组织 硬度 |
| 收稿时间： | 2022-05-27 |
Determination and analysis of SH-CCT curve of Q345FRE fire-resistant steel |
| |
| Liu Pan,Wang Honghong,Yan Wenze,Peng Siyuan.Determination and analysis of SH-CCT curve of Q345FRE fire-resistant steel[J].Heat Treatment of Metals,2022,47(10):88-93. |
| |
| Authors: | Liu Pan Wang Honghong Yan Wenze Peng Siyuan |
| |
| Affiliation: | 1. College of Science, Wuhan University of Science and Technology, Wuhan Hubei 430065, China;2. State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan Hubei 430081, China;3. Hubei Collaborative Innovation Center for Advanced Steels, Wuhan University of Science and Technology, Wuhan Hubei 430081, China |
| |
| Abstract: | Welding thermal simulation of Q345FRE fire-resistant steel was carried out by using Gleeble-3500 testing machine. And the phase transition temperature of welding HAZ in the Q345FRE steel under different t8/5 conditions was measured by means of expansion method, lever method, metallographic analysis and hardness, then SH-CCT curve of the Q345FRE steel was drawn, and the microstructure change of welding HAZ in the Q345FRE steel under different t8/5conditions was studied. The results show that the microstructure of HAZ in the Q345FRE steel is bainite when t8/5 is in the range of 3-80 s; when t8/5 is in the range of 80-300 s, the microstructure is bainite, ferrite and pearlite; when t8/5 is in the range of 300-600 s, the microstructure is ferrite and pearlite. As t8/5 increases, the hardness of HAZ in the Q345FRE steel decreases. In order to maintain the microstructure stability, it is suggested that the proper welding line energy of the Q345FRE fire-resistant steel should be selected in the range of 15-150 kJ/cm. |
| |
| Keywords: | Q345FRE fire-resistant steel SH-CCT curve microstructure hardness |
|
| 点击此处可从《金属热处理》浏览原始摘要信息 |
|
点击此处可从《金属热处理》下载全文 |
|
