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张旭志，张家志，丁建武，等.环形光束激光焊接Al-Si镀层22MnB5钢的组织与性能研究［J］.电焊机，2023，53（7）：31-39.
ZHANG Xuzhi, ZHANG Jiazhi, DING Jianwu, et al.Study on Microstructure and Properties of Al-Si Coated 22MnB5 Steel by Ring Beam Laser Welding[J].Electric Welding Machine, 2023, 53(7): 31-39.
使用可调环形光斑光纤激光焊接工艺，对铝硅镀层22MnB5钢进行激光拼焊，研究了中心激光束和环形激光束不同功率配比对焊缝宏观形貌、显微组织和力学性能的影响。结果表明，中心激光束和环形激光束的配比对焊缝熔宽的影响较小，当两者配比为1∶1时，焊缝表面的塌陷量最小。随着环形激光束功率的增大，焊缝中心区域的硬度值先增大后减小，当中心激光束和环形激光束的激光功率均为1 500 W时，取得最大值为448.5 HV。当中心激光束功率为2 000 W、环形激光束功率为0 W时，硬度值最小，为310.2 HV。在环形光斑激光作用区域，熔合线边缘会产生条带状铁素体，拉伸形变过程中裂纹在铁素体处萌生扩展，是焊接接头失效的主要原因。当中心激光束和环形激光束功率均为1 500 W时，接头抗拉强度和延伸率最高，接头断裂在焊缝熔合线附近；当中心激光束功率小于环形激光束功率时，焊缝裂纹从焊缝上边缘熔合线开始萌生；当中心激光束功率大于等于环形激光束功率时，裂纹由下边缘熔合线处萌生。
The effect of different power ratios of the central laser beam and the annular laser beam on the macroscopic morphology, microstructure and mechanical properties of the weld was investigated using an adjustable annular spot fiber laser welding process for laser sputtering of aluminum-silicon coated 22MnB5 steel. The results show that the ratio of the central laser beam and the annular laser beam has a small effect on the weld melt width, and the collapse of the weld surface is minimized when the ratio is 1∶1. The hardness value in the central region of the weld increases and then decreases as the power of the annular laser beam increases, achieving a maximum value of 448.5 HV when the laser power of both the central and annular laser beams is 1 500 W. The minimum hardness value is 310.2 HV when the power of the central laser beam is 2 000 W and the power of the annular laser beam is 0 W. In the area of the annular spot laser action, the fusion line edge will Strip ferrite, tensile deformation process cracks sprouted at the ferrite expansion, is the main cause of failure of welded joints. When the center laser beam and ring laser beam power is 1 500 W, the joint tensile strength and elongation is the highest, the joint fracture in the vicinity of the weld fusion line. When the center laser beam power is less than the annular laser beam power, the weld crack starts from the upper edge of the weld fusion line, and when the center laser beam power is greater than or equal to the annular laser beam power, the crack starts from the lower edge of the fusion line.
铝硅镀层激光焊接环形光斑功率配比力学性能
Al-Si coatinglaser weldingring beamdifferent power ratiomechanical property
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