| 摘要 |
PURPOSE:To improve the low-temp. toughness and sea water corrosion resistance of a weld metal by coating a coating material which contains a specific ratio of Cu and is added with adequate ratios of Si, Ni, and Ti, Al, Mg as well as metallic carbonate and metallic fluoride onto a carbon steel core wire. CONSTITUTION:The coating material contg. 1.2-2.9wt% Cu, 1.1-3.8% Si, 0.9-4.8% Ni, 3.1-5.8% >=1 kinds among Ti, Al, Mg, 33-60% metallic carbonate, 12-25% metallic fluoride, and deoxidizing agent, arc stabilizer, slag forming agent, binder and if necessary, <=0.6% Cr, <=0.8% Mo is prepd. Such coating material is coated on the carbon steel core wire. Since such low hydrogen type coated electrode has the excellent sea water corrosion resistance and low-temp. toughness and therefore, the electrode is effective for welding of ocean structures in frozen ocean areas, building of icebreakers, etc.
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