李平和1, 習天輝1， 2, 卜 勇1
(1. 武漢鋼鐵（集團）公司技術(shù)中心, 武漢 430080;
2. 武漢科技大學, 武漢 430081)
摘 要: 對大線能量焊接耐火耐候建筑用鋼WGJ510C2的力學性能、 焊接性能及其典型應(yīng)用進行了研究。 試驗結(jié)果表明： 該鋼具有優(yōu)良的綜合力學性能，在600℃溫度下的屈服強度均高于其室溫下屈服強度的2/3， 完全滿足建筑結(jié)構(gòu)用鋼耐火安全性的強度許用指標；該鋼具有低的焊接冷裂紋敏感性， 能承受大線能量（50~100kJ/cm）焊接；該鋼在大型建筑應(yīng)用中的實際效果良好。
關(guān)鍵字: 耐火性能; 耐候性能; 力學性能; 焊接性能; 大線能量焊接; 建筑鋼
LI Ping-he1, XI Tian-hui1, 2, BU Yong1
（1. NETC of Wuhan Iron and Steel (Group) Corporation， Wuhan 430080, China;
2. Wuhan University of Science and Technology， Wuhan 430081, China）
Abstract:The mechanical performance, weldability and usage of high fire-resistant and weathering construction steel named WGJ510C2 were evaluated. The results show that this steel has fine integrated mechanical performance and the yield strength of the steel at 600℃ is more than 2/3 of the yield strength at room temperature, which is suitable for the fire-resistant safety of constructions. The steel has low cold-cracking sensitivity and can bear high heat input (50-100kJ/cm). The practical use in huge constructions is excellent
Key words: fire-resistant; weathering; mechanical performance; weldability; high heat input; construction steel
