The influence of RE on the microstructure and hardness of welded joint was studied by the experiments adding RE in electrode covering.
通过在药皮中添加稀土合金的试验，研究了稀土对高钒焊条焊补铸铁接头组织与硬度的影响。
Small amounts of boron were transferred from the electrode to weld metal by adding boron oxide or ferroboron powder to the electrode covering.
通过在焊条药皮中加入氧化硼或硼铁向焊缝渗入微量硼。
The invention relates to a welding rod material for sulfur resisting dew point corrosion steel, in particular to an electrode covering for sulfur resisting dew point corrosion steel.
本发明涉及抗硫露点腐蚀钢的焊条材料，特别涉及一种用于抗硫露点腐 蚀钢的焊条药皮。
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