根据现代焊接基础理论,氢元素不仅是焊缝金属中气孔的来源之一,而且也是形成焊缝金属冷裂纹的三大要素之一。氢的来源较为广泛,如焊条药皮或某些组成物(如铁锈等)中的水份(吸附水、结晶水)、工件表面的汕污、以及钢中的残存氢……等,尤以前者(药皮中的水份)影 According to modern welding theory, hydrogen is not only one of the sources of pores in weld metal, but also one of the three major factors that form a cold crack in weld metal. Hydrogen sources more widely, such as electrode coating or some of the composition (such as rust, etc.) in the water (adsorbed water, crystal water), the workpiece surface Shantou, as well as residual hydrogen steel ... ... and so on, especially before (Skin in the film) shadow