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以建筑钢结构用Q345钢板为对象,研究了焊接功率、焊接电流和电弧高度对其熔深和焊缝宽度的影响,并探讨了焊接工艺参数对焊接质量的作用机理。结果表明,要得到较为理想的焊接品质,焊接过程中,焊接功率、焊接电流和电弧高度需要控制在一定范围内,焊接工艺参数优化结果表明合适的焊接功率为3 000~3 500 A,焊接电流为105~145 A,电弧高度为3~4 mm。
The effect of welding power, welding current and arc height on penetration depth and weld width of Q345 steel plate for building steel structures was studied. The mechanism of welding process parameters on welding quality was also discussed. The results show that in order to obtain a better welding quality, the welding power, welding current and arc height need to be controlled within a certain range. The optimization of welding process parameters shows that the suitable welding power is 3 000 ~ 3 500 A and the welding current 105 ~ 145 A, the arc height is 3 ~ 4 mm.