一、焊接方法及其特点加铁粉单面埋弧自动焊接法如图1所示,是在焊接接头的背面衬以有槽的紫铜衬垫,并于坡口中加入一定数量的铁粉或合金粉末,然后用普通埋弧自动焊机从一面施行焊接,从而实现单面焊接两面同时成型的一种高效率埋弧焊接法。这种方法的一个重要特点是,在焊接过程中,靠近电弧前方的部分铁粉因受电弧热的作用先行熔化,在铜垫的凹槽内形成一个熔融的液态金属层,电弧在这一液态层上燃烧。这样,既保护铜垫免受电弧的直 First, the welding method and its characteristics Add one-sided iron submerged arc welding method is shown in Figure 1, the back of the welded joints lined with grooved copper liner, and in the bevel by adding a certain amount of iron powder or alloy Powder, and then using a common submerged arc welding machine from one side of the implementation of welding, so as to achieve the same time both sides of single-sided welding of a high efficiency submerged arc welding. An important feature of this method is that during the welding process, a portion of the iron powder near the front of the arc is melted by the action of arc heat to form a molten liquid metal layer in the groove of the copper pad. The arc is in this liquid state Burning on the floor. In this way, the copper pad is protected from arcing