我們从倉庫里領出来一批焊条,如果把它們烘烤一下使用,就觉得比較好,例如:飞濺减少了,气孔避免了,电弧也比較稳定了。但是,如果我們把焊条烤得过火,那么在焊接的时候反而又感到不好用了。这是为什么呢? 焊条外面都包有一層藥皮。各种不同牌号的焊条,它的藥皮成分也是不同的。但是藥皮中总有一部分原材料能够吸收空气中的潮气;即使焊条放在很干燥的倉庫里,水气仍然会跑到焊条中去。当焊条藥皮中有苏打、鉀碱、粘土等吸水物質时,焊条就更容易發生反潮現象了。通常焊条在制造完畢后要进行一次干燥,把藥皮中的水分降低 We took out a batch of welding rods from the warehouse and felt better if they were to be baked for a while. For example, the spatter was reduced, the pores were avoided, and the arc was stable. However, if we bake the electrode too much, then we feel it is not good at welding. Why is this? Electrodes are covered with a layer of skin outside. Various brands of welding rod, its composition is also different from the skin. However, there is always some raw material in the skin that absorbs the moisture in the air; even if the electrode is placed in a dry warehouse, the moisture still runs into the electrode. When the electrode coating soda, potash, clay and other water-absorbing material, the electrode is more prone to reverse tide phenomenon. Usually after the electrode is manufactured to be carried out once the drying, the skin to reduce the water