DH590钢板激光束焊的焊接特性研究

对厚1.5mm规格DH590钢板进行激光束焊焊接试验,研究该钢板的激光束焊焊接特性以及焊接接头性能。结果表明,1.5 mm规格的DH590+Z钢板单板的最大焊接速度为6.8 m/min,搭接板最大焊接速度为3.2m/min;连续搭接试验的平均最大抗剪力为41.6 k N,断续搭接试验的平均最大抗剪力为18.9 k N,焊接接头的平均最大抗拉力为12.5 k N;焊接接头焊缝区的显微硬度分布均匀,热影响区不存在明显的软化点;对焊接接头进行X光探伤检测,未发现气孔和裂纹缺陷,焊缝质量良好。

Research on laser beam welding characteristics of DH590 steel

Through the laser beam welding experiments of 15 mm DH590 steel plate,the welding characteristics and welding joint performance are investigated.The results show that the maximum welding speed for single sheet thickness of DH590 is 6.8 m/min and the maximum welding speed on a lap joint is 3.2 m/min.The maximum shear tensile force for continuous lap welds and stitched lap welds are 41.6 kN and 18.9 kN,respectively.The maximum cross tension force of welding joints is 12.5 kN.The microhardness distribution of fusion zone in welding joint is homogeneous and there are no softening points in the heat affected zone X-ray detections are carried out on the welding joints and the porosity and crack defects are not found,which indicates the good welding quality of the welded joints.