散焦激光束对焊SUS304和Inconel718管

IF 1.7 4区 工程技术 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Laser Applications Pub Date : 2023-11-01 DOI:10.2351/7.0001086
Jian Cheng, Feng Xie, Yulong Chen, Xingpeng Zhang, Zhongshen Zhai, Fengping Li, Dun Liu
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引用次数: 0

摘要

目前,将不锈钢与高温合金结合在航空和汽车工业中具有广泛的应用前景。然而,传统焊接在熔合区容易出现裂纹和奥氏体晶粒粗化等缺陷。由于SUS304不锈钢和Inconel718高温合金圆管具有精确的局部热输入和精度,本研究采用激光焊接方法进行了连接。通过改变离焦距离、焊接速度和激光功率对焊接特性的影响,研究了离焦距离、焊接速度和激光功率对焊接特性的影响,表明不同的工艺参数对焊缝的截面形貌和形状有很大的影响。此外,利用有限元仿真软件对温度场分布进行了模拟。结果表明,随着激光功率的逐渐降低,温度场会出现一个缓冲区,这明显反映了激光功率的降低对消除焊缝凹坑的影响。因此,在实际焊接过程中,通过同步调节激光功率,可以有效地消除焊接开始和结束时激光束加速和减速造成的弹坑缺陷。
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Butt welding of SUS304 and Inconel718 tubes by using defocused laser beam
Joining stainless steel to superalloy is currently of extensive interest for applications in aviation and automotive industries. However, conventional welding is prone to encounter defects such as cracks and austenite grain coarsening in the fusion zone. In the present study, laser welding was applied to join SUS304 stainless steel and Inconel718 superalloy circular tubes due to their precise local heat input and accuracy. The effects of defocusing distance, welding speed, and laser power on welding characteristics were studied by changing the values of the mentioned parameters, which manifested that different process parameters exerted a tremendous impact on the cross section morphology and shape of the weld seam. In addition, finite element simulation software was used to simulate temperature field distribution. The results revealed that there would be a buffering region on the temperature field once the laser power gradually decreased, which remarkably reflected the effect of the laser power descending on eliminating weld craters. Therefore, the crater defects caused by laser beam accelerating and decelerating at the start and end of welding could be effectively eliminated through synchronously regulating laser power in the real welding process.
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来源期刊
CiteScore
3.60
自引率
9.50%
发文量
125
审稿时长
>12 weeks
期刊介绍: The Journal of Laser Applications (JLA) is the scientific platform of the Laser Institute of America (LIA) and is published in cooperation with AIP Publishing. The high-quality articles cover a broad range from fundamental and applied research and development to industrial applications. Therefore, JLA is a reflection of the state-of-R&D in photonic production, sensing and measurement as well as Laser safety. The following international and well known first-class scientists serve as allocated Editors in 9 new categories: High Precision Materials Processing with Ultrafast Lasers Laser Additive Manufacturing High Power Materials Processing with High Brightness Lasers Emerging Applications of Laser Technologies in High-performance/Multi-function Materials and Structures Surface Modification Lasers in Nanomanufacturing / Nanophotonics & Thin Film Technology Spectroscopy / Imaging / Diagnostics / Measurements Laser Systems and Markets Medical Applications & Safety Thermal Transportation Nanomaterials and Nanoprocessing Laser applications in Microelectronics.
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