(1. 武汉钢铁（集团）公司技术中心, 武汉 430080;
2. 武汉科技大学, 武汉 430081)
摘 要: 对大线能量焊接耐火耐候建筑用钢WGJ510C2的力学性能、 焊接性能及其典型应用进行了研究。 试验结果表明： 该钢具有优良的综合力学性能，在600℃温度下的屈服强度均高于其室温下屈服强度的2/3， 完全满足建筑结构用钢耐火安全性的强度许用指标；该钢具有低的焊接冷裂纹敏感性， 能承受大线能量（50~100kJ/cm）焊接；该钢在大型建筑应用中的实际效果良好。
关键字: 耐火性能; 耐候性能; 力学性能; 焊接性能; 大线能量焊接; 建筑钢
（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
