Gr420E大型铸钢件与F36低合金钢厚板焊接工艺研究

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Studying on the welding procedure of heavy casting Gr420E and low alloy steel heavy plate F36

WU Jianxin，CHEN Xiaoxiao，LIU Qin，WU Fengmin COSCO Shipping（Qidong） Offshore Co.，Ltd.，Nantong 22620o，Jiangsu， China

Abstract： Based on the welding fabrication of heavy cast steel components for offshore equipment， welding procedure qualification test is conducted on dissimilar weld joint between casting NORSOK M-122 Gr420E with thickness 150mm and low alloy steel F36 with thickness 75mm .This study details the welding process，，welding consumable selection，groove design，optimization of welding parameters，mechanical property test，and critical point of welding quality control.The results of process test and construction production show that welded joints meeting construction requirements can be obtained through adequate preheating before welding，strict control of interpass temperature and welding heat input.

Keywords：cast steel; heavy plate;welding procedure qualification; CTOD test

1序言

铸钢作为一种常见的焊接结构材料，在载荷大、受力复杂的节点部位有着广泛应用。（剩余4624字）