中厚板低合金钢Q345R埋弧焊接工艺研究

Research on Submerged Arc Welding Technology of Medium Thick Low Alloy Q345R Steel Plate

摘要: 研究了Q345R低合金钢H10Mn2焊丝和SJ101焊剂焊接工艺，结果表明，焊接接头抗拉强度达到517 MPa，大于母材最低值490 MPa，-20℃V型低温冲击功吸收值最小值98 J，高于最低要求41 J；焊接接头达到NB/T 47013.2-2011能标Ⅰ级要求，选择的焊接材料和制定的焊接工艺满足Q345R中厚板低合金钢埋弧焊的质量要求。

Abstract: The welding process of Q345 R with H10 Mn2 as welding wire and SJ101 as welding flux was studied.Resultsshowed that the tensile strength of the welding joint reached 517 MPa, higher than the minimum 490 MPa of the base material, and that the minimum value of -20℃ low temperature V-shaped impact energy absorption was 98 J, higher than the minimum requirement of 41 J, so the welding joint could meet the I grade requirement of NB/T 47013.2-2011. It manifested that the chosen welding materials and the welding process could satisfy the quality requirement for the submerged arc welding of Q345 R medium thick low alloy steel.