LIU Yao, WANG Lei, TANG Yingying, et al.Numerical Simulation of Keyhole Behavior and Porosity Suppression Methods of Electron Beam Partial Penetration Welding[J].Electric Welding Machine, 2023, 53(6): 1-7.
LIU Yao, WANG Lei, TANG Yingying, et al.Numerical Simulation of Keyhole Behavior and Porosity Suppression Methods of Electron Beam Partial Penetration Welding[J].Electric Welding Machine, 2023, 53(6): 1-7. DOI: 10.7512/j.issn.1001-2303.2023.06.01.
Numerical Simulation of Keyhole Behavior and Porosity Suppression Methods of Electron Beam Partial Penetration Welding
Porosity defects are often occurred in electron beam welded locked butt joint of aero-engine. A 3D numerical model of the transient keyhole and molten pool dynamics during electron beam welding was established to simulate the welding process. By comparing the experimental results with simulation results, the reason of porosity formation is the cavity from collapse of unstable keyhole captured by the solidified front. The simulation of pulsed electron beam welding proved that, the higher the pulsed frequency, the more stable the keyhole. When the frequency is 1000 Hz, the keyhole was dynamically stable, and porosity defect was effectively suppressed. The results provide a theoretical basis for the suppression of porosity defects in non-penetration electron beam welding.
关键词
电子束焊接匙孔行为气孔缺陷脉冲束流数值模拟
Keywords
electron beam weldingkeyhole behaviorporositypulsed beamnumerical simulation
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