稀土钨电极对TIG焊缝熔深和熔宽的影响

以不锈钢板为母材，对W－La2O3、W－Y2O3、W－CeO2和参照的W－ThO24种TIG焊用钨电极进行了直流焊接试验，对比了它们焊缝的熔深和熔宽．试验结果表明，4种电极的熔宽相差不大，熔深由大到小的顺序为：W－Y2O3最大，W－CeO2和W－La2O3居中，W－ThO2最小.研究发现，熔深的大小与电极电子发射能力的好坏有较好的对应关系：电极的电子发射能力越好，其焊接熔深越深．

The Influence of Rare Earth-W Electrodes on TIG Welding Penetration and Width

The welding penetration and width of four types of Tungsten electrodes,W-La2O3, W-Y2O3, W-CeO2 and W-ThO2 (for reference) are measured and compared by means of DC TIG welding with stainless steel as the base metal. As it turns out that,there is no significant difference among the four types of electrods in terms of welding width, under the same experimental condition, and W-Y2O3 electrode exhibits the deepest welding penetration followed by W-CeO2 and W-La2O3 as the medium and W-ThO2 as the smallest. Studies indicate that the welding penetration has corresponding relationship with the electrode's hot emission ability, that is, the better the emission ablity, the deeper the welding penetration.