高强特厚板焊接施工工艺监造.doc

高强特厚板焊接施工工艺监造


摘 要：通过对高强特厚板材料热影响区的脆化、冷裂纹和层状撕裂等焊接性能的分析，得出Q345GJC钢材焊接性能较差的结论。通过对高强特厚板焊接工艺质量控制要点进行深入研究，并应用于广州越秀城建国际金融中心（广州“西塔”)钢结构制作监造中，焊缝合格率达到100%，有效的保证了工程的质量。

关键词：高强特厚板，预热温度，层间温度，焊接线能量，碳当量

WELDING TECHNOLOGY OF HIGH STRENGTH THICK PLATE

Abstract：Based on the research of the welding performance of high strength thick plate, including brittleness in weld heat-affected zone, cold welding Cracks, lamellar tearing, we can draw a conclusion that high strength thick plate makes a poor performance in welding. According to the deep research of the key quality control point for welding technology for high strength thick plate, and apply it to the supervision of manufacturing for steel structural components of Guangzhou West Tower, the qualified rate of welding reached to 100%, ensuring the project quality efficiently.
Key word: high strength thick plate; Preheating Temperature, inter-pass temperature, weld heat input, carbon equivalent