Q345E钢薄板小变形焊接工艺

吴宪; 丁成钢

doi:10.7512/j.issn.1001-2303.2021.09.10

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Q345E钢薄板小变形焊接工艺
Small deformation welding process of Q345E steel sheet
2021年51卷第9期页码：50-54
纸质出版：2021
DOI： 10.7512/j.issn.1001-2303.2021.09.10
稿件说明：

移动端阅览

吴宪, 丁成钢. Q345E钢薄板小变形焊接工艺[J]. 电焊机, 2021,51(9):50-54. DOI： 10.7512/j.issn.1001-2303.2021.09.10.

WU Xian, DING Chenggang. Small deformation welding process of Q345E steel sheet[J]. Eletric Welding Machine2021, 51(9): 50-54. DOI： 10.7512/j.issn.1001-2303.2021.09.10.

摘要

分别采用高频脉冲MAG焊的打底焊模式与电弧冷焊模式对板厚3 mm的Q345E薄板进行了3种工况的对接焊工艺试验

研究了薄板打底焊与电弧冷焊的小变形对接焊工艺与焊接接头的力学性能

进行了拉伸、弯曲、金相试验并分析了焊接缺陷的形成原因

总结了焊接残余应力及焊接变形的规律。结果表明

高频脉冲MAG焊适用于Q345E钢3 mm的薄板小变形对接焊

组对"0"间隙时

选用打底焊模式的工艺包;组对1 mm间隙时

选用电弧冷焊模式的工艺包。

Abstract

The butt welding tests of Q345E thin plate with thickness of 3 mm were carried out by using high frequency pulse MAG backing welding mode and arc cold welding mode respectively. The small deformation process and mechanical properties of butt welding joint were studied

the metallo-graphic test was carried out

the causes of welding defects were analyzed

and the laws of welding residual stress and welding deformation were summarized. The results show that high frequency pulse MAG welding is suitable for small deformation butt welding of Q345E steel plate with 3 mm gap. When assembling "0" gap

the process package of backing welding mode is selected; when assembling 1 mm gap

the process package of arc cold welding mode is selected.