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气孔是低碳钢焊接时常见的一种缺陷。在造成焊缝返工的缺陷中,气孔缺陷占相当大的比例。长期以来,人们对气孔的形成机理进行了大量地研究。一般认为,气孔是由于溶解在金属中的气体或冶金反应的气态产物析出所形成的气泡被凝固金属包围所致。氢、氮以及由于在熔池金属中碳被氧
Stomatal is a common defect in mild steel welding. Among the defects causing weld rework, stomatal defects account for a significant proportion. For a long time, people have done a lot of research on the formation mechanism of stomatal. It is generally believed that the pores are due to the solidification of the gas bubbles formed by the precipitation of gaseous or metallurgical products dissolved in the metal. Hydrogen, nitrogen and due to oxygen in the bath metal are carbon