An iron-based electrode for vertical down welding and a method of manufacturing the same

By using a specific ratio of flux coating and H08A low-carbon steel core iron-based welding rods, the process problems of vertical downward welding were solved, achieving high impact toughness and arc stability of weld metal at low temperatures, making it suitable for all-position welding of high-strength steel structures.

CN122400897APending Publication Date: 2026-07-17SHANDONG JULI WELDING CO LTD +2
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Patent Information

Application Number
CN202610750410.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-28
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing welding electrodes have poor processability when welding vertically downwards, failing to meet the requirements of fast slag solidification speed, moderate arc blowing force, and no weld metal dripping, resulting in poor welding effect.

Method used

Iron-based welding electrodes are prepared by using coatings with specific component ratios, including marble, fluorite, rutile, titanium dioxide, ferrosilicon, electrolytic manganese, nickel powder, and reduced iron powder, through mixing, pressure coating, and drying processes. This results in short slag and low hydrogen characteristics, which, when combined with an H08A low-carbon steel core, improves welding performance.

Benefits of technology

The weld metal maintains high impact toughness at low temperatures, the arc is stable during welding with little spatter, the molten pool is well supported, and the weld formation is aesthetically pleasing. It is suitable for welding high-constraint, high-strength steel structures and meets the requirements for all-position vertical-down welding.

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Abstract

本发明提供一种用于立向下焊接的铁基焊条及其制备方法，涉及焊接材料技术领域。所述铁基焊条包括焊芯和涂覆于所述焊芯表面的药皮，以所述药皮的总质量计，所述药皮包括如下组分及各组分的质量百分比如下：大理石24~27%，萤石1.5~3%，金红石3~7%，钛白粉3~7%，硅铁3.5~5.5%，电解锰4.5~5.5%，镍粉4.5~5.5%，硅微粉0.5~2%，稀土硅铁0.5~1.5%，还原铁粉40~50%，白云石0.5~2%，氧化铝1~2.5%，CMC0.5~1%。本发明的铁基焊条电弧稳定、飞溅小、脱渣容易、熔渣凝固速度快、适合全位置立向下焊接。
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