(1) It can accurately control the heat input and the size of the molten pool to the workpiece, improve the anti-burn through and weld pool protection ability of the weld, and easily obtain uniform penetration, especially suitable for all-position welding and single sheet of thin plate (thin to 0.1mm) Face welding is formed on both sides.
(2) Each solder joint is heated and cooled rapidly. During the soldering process, the molten metal of the molten pool is fast and the residence time of the high temperature is short, which can reduce the tendency of the heat sensitive material to crack when soldered.
(3) The pulse arc can obtain a larger penetration depth with a lower heat input, so the heat affected zone can be reduced under the same conditions. When welding heat sensitive materials, reducing the pulse current passage time and the base current value can reduce the range of the heat affected zone to a minimum, so that the welding deformation is small, which is especially important for thin plate and ultrathin plate welding.

(4) Prevent burn-through, in thin-plate welding or thick-plate bottom welding, by means of peak current passage time, weld the weldment, and then transfer to the base current before the molten pool is obviously depressed, so that the metal solidifies. Moreover, there is a small current to maintain the arc until the next peak current cycle.
(5) Increase the aspect ratio of the weld, and increase the weld width to 2:1 when welding stainless steel.
(6) Increasing the stirring action of the molten pool. At the same average current value, the peak current value of the pulse current is larger than the constant current, so the arc force is large and the stirring effect is strong, which helps to reduce the possible occurrence of pores at the bottom of the joint. Fusion phenomenon. In small current welding, a large pulse current peak current enhances arc stiffness and eliminates arc drift.