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采用定量PF模型对2A14合金焊接熔池显微组织演变过程进行了模拟,探索了焊接功率对2A14合金焊接熔池界面形态、界面液相一侧溶质浓度和界面尖端速度的影响,并与相同焊接工艺条件下的钨极惰性气体保护焊(TIG)实验结果进行了对比。结果表明,不同焊接功率下PF模型计算得到的失稳波长与实验结果较为接近,失稳波长并未随着焊接功率的增大而发生明显变化;整体而言,不同焊接功率下的失稳波长都集中在一个较小范围内。
The quantitative PF model was used to simulate the microstructure evolution of 2A14 alloy weld pool, and the effect of welding power on the morphology of weld pool, the solute concentration on the liquid phase side and the tip speed of 2A14 alloy was explored. Compared with the same welding TIG test results under process conditions were compared. The results show that the buckling wavelength calculated by PF model at different welding power is close to the experimental one, and the buckling wavelength does not change obviously with the increase of welding power. On the whole, the buckling wavelength under different welding power Are concentrated in a smaller range.