建筑高性能结构钢Q550GJC的焊接技术

高性能结构钢具有强度高、延性好、省材等优势,并有着优越的性能和显著的经济效益,已逐渐在高层和大跨度建筑以及公路桥梁中得到推广应用。由武汉钢铁(集团)公司研发的Q550GJC是一种新型建筑高性能结构钢,目前在国内建筑钢结构领域中尚无应用实例。在研究钢材焊接性与焊接材料的选用等必要试验的基础上,对Q550GJC的埋弧自动焊SAW、手工电弧焊SMAW、熔化极气体保护焊GMAW、药芯焊丝电弧焊FCAW等工艺方法进行焊接工艺评定试验,评定结果满足GB 50661—2011《钢结构焊接规范》的要求,可为今后工程施工应用以及有关规范标准的制定、修订提供有益的参考。

WELDING PROCESS OF BUILDING HIGH-PERFORMANCE STRUCTURAL STEEL Q550GJC

High performance structural steel features high strength,good ductility and material-saving,which has a superior performance and remarkable economic benefits,it is getting more popularization and application in tall and large span buildings as well as highway bridges. Developed by WISCO Q550GJC is a new type of building high performance structural steel. So far,it has not been applied in the field of domestic construction steel structure. On the basis of the research in necessary test such as steel weldability and the selection of welding material,it was qualified and summarized the WPS of Q550GJC including SAW,SMAW,GMAW and FCAW,which could meet the requirements of national standard Code for Welding of Steel Structures GB50661—2011. The WPS provided the beneficial reference for the future engineering application and the development of relevant standards.