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熔化极气体保护弧焊是一种灵活的方法,包括三种型式,即射流过渡、短路过渡(即熔滴过渡)和脉冲弧焊。它可用于各种位置,可自动焊,也可手工焊。平焊一般用射流型式,其他位置焊接用另外两种。在平焊以外位置,熔化极气体保护焊的焊接速度比药皮焊条手工焊高一倍。这种方法焊成的焊缝氢低,广泛用于对氢敏感的合金钢。缺点是当在保护气体中加入少量氧化气体时,焊缝中氧化物相对增多,影响焊接件的韧性。
Fusion Gas Guard Arc Welding is a flexible method that includes three types of jet transitions, short circuit transitions (droplet transitions), and pulsed arc welding. It can be used in a variety of locations, can be automatically welded, but also manual welding. Flat welding generally use the jet type, the other location welding with two other. Outside the flat welding position, the melting gas welding gas welding speed welding rod twice higher than manual welding. This method of welding low hydrogen weld is widely used in hydrogen-sensitive alloy steel. The disadvantage is that when adding a small amount of oxidizing gas in the protective gas, the relative increase in oxide in the weld, affecting the toughness of the weldment.