激光技术2024，Vol.48Issue(2)：229-234,6.DOI:10.7510/jgjs.issn.1001-3806.2024.02.013
Q345B/304异种钢激光填丝焊接工艺与性能研究
Laser filler welding process and mechanical properties of Q345B/304 dissimilar steel joints
摘要
Abstract
In order to improve the quality of dissimilar steel welding.Adopting laser welding technology welding of two heterogeneous materials,Q345B low alloy steel,and the 304 stainless steel.Under different laser powers,the welded joints were thoroughly characterized and analyzed using metallographic microscopy,scanning electron microscopy,and energy dispersive spectroscopy.Experimental data indicates that when the laser power is higher than 3 kW,the joint can be fully welded,and the weld sections of 4 kW,4.5 kW and,5 kW all present the waist phenomenon.The weld microstructure is typical lath martensite.The size of the lath martensite in the weld of 5 kW is smaller,showing the highest hardness value.The tensile strength of the weldment of 4 kW reaches 590 MPa.With the increase of laser power,the tensile strength of the weldment gradually decreases.In the weld,there are no M23C6 and σ phases,which have a great influence on the quality,but mainly Cr2Ni3,Fe2Ni3,and α-Fe phases.The results indicate that using laser wire filling welding technology can achieve high-quality welding of Q345B/304 dissimilar steel.关键词
激光技术/异种钢/激光焊接/激光功率/焊缝组织/力学性能Key words
laser technique/dissimilar steel/laser welding/laser power/weld microstructure/mechanical property分类
金属材料引用本文复制引用
刘海,陈辉..Q345B/304异种钢激光填丝焊接工艺与性能研究[J].激光技术,2024,48(2):229-234,6.基金项目
机械结构优化及材料应用泸州市重点实验室科研课题(SCHYZSB-2023-02) （SCHYZSB-2023-02）
四川化工职业技术学院自然科学重点资助项目(SCHYA-2023-01) （SCHYA-2023-01）
