191问答库 > 氩弧焊机焊口发黑跟氩气流量大小有关系吗？怎么改正

氩弧焊机焊口发黑跟氩气流量大小有关系吗？怎么改正

2025-03-16 08:50:55
推荐回答（2个）
回答1：

1、氩弧焊时焊缝背面应提前送气，流量适当加大，空气排出后，流量逐渐减小。焊接过程中应不问断地向管内充氩。停焊时滞后停气，使焊缝得到充分的保护。另外应特别注意的是，空气排净后才能进行焊接，否则影响充氩的保护效果。

回答2：

氩弧焊即GTAW 一般采用的钨极规格为2.0或者2.5/2.4mm,铈钨极. 电流控制在80~140之间,根据板厚或者壁厚确定. 气体一般是说流量,很少谈及压力,只要瓶中压力不低于0.5MPa就可以,流量一般在10~15L/Min. 正常情况焊接黑色金属为DCEN即直流正接.

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