用统计试验法确定了钨极气体保护电弧焊脉冲参数如频率、幅值和波形对熔深、深—宽比的影响,和离焊缝中心线不同距离上达到的最高温度。结果表明,在三个脉冲参数中,脉冲幅值是最重要的,波形和频率也是重要的。用脉冲电流和普通钨极气体保护电弧焊焊接既定熔深焊缝热输入的比较证实,脉冲电流焊接的热输入比普通钨极气体保护电弧焊的少。 The influence of pulse parameters such as frequency, amplitude and waveform of tungsten arc gas shielded arc welding on penetration depth and aspect ratio as well as the maximum temperature reached at different distances from the weld centerline were determined by statistical tests. The results show that the pulse amplitude is the most important among the three pulse parameters, and the waveform and frequency are also important. The comparison of the pulse current and the conventional TIG welding arc welding with the heat input of a given penetration weld confirms that the heat input of the pulse current welding is less than that of an ordinary tungsten gas shield arc welding.