摘要
By measuring the content of oxygen and nitrogen in welds of six kinds of self-shielded flux-cored wires,the effect of oxygen on nitrogen content in weld is studied and the different absorptive mechanisms of nitrogen at a low oxygen level([O] lower than 0.02%) and a high oxygen level ([O] higher than 0.03%) have been discovered.The results indicate that the content of nitrogen in weld can be made lowest by modifying the composition of flux and controlling the content of oxygen to the range of 0.02%～0.03%.
通过测定 6种焊缝中的氮、氧含量 ,研究了氧对焊缝金属吸氮量的影响 ,发现液态金属在低氧 ([O] <0 .0 2 % )和高氧 ([O] >0 .0 3 % )条件下不同的吸氮机制 ,并且提出通过调整药芯成分 ,将焊缝氧含量控制在 0 .0 2 %～ 0 .0 3 %范围内 ,可使焊缝吸氮量最低 .
