High-strength and high-flexible acid electrode for ships

Abstract

The invention discloses a high-strength and high-flexible acid electrode for ships, belonging to the technical field of welding materials and welding. The high-strength and high-flexible acid electrode comprises a welding core and a coating, wherein the welding core is H08A steel; and the coating comprises the following components in mass percentage: 15-45 of reduced ilmenite, 3-30 of rutile, 6-30 of marble, 3-20 of illite, 3-10 of sericite, 1-10 of mica, 5-15 of mid-carbon fe-mn, 0.1-6 of aluminum, 0.05-6 of magnesium, 0.5-3 of ferrosilicon and 1-5 of cellulose. By adopting a manganese and aluminum-magnesium-silicon combined deoxidation mode, the oxidation of manganese is reduced, thereby improving the efficiency of manganese as an alloy agent being transmitted to a welding seam; and the usage amount of manganese and the material cost in the coating are decreased and the manganese content in welding fly dust is reduced, thereby decreasing the toxicity of the welding fly dust, protecting the health of a welder and saving the manganese resources at the same time. The invention has excellent welding process property and excellent deposited metal and welded joint comprehensive property, and is particularly suitable for the steel plate 3Y-level welding seam welding and the assembly spot welding and repairing for DH36 and EH36 ships.

Description

technical field [0001] The invention relates to a welding rod, in particular to a marine high-strength and high-toughness acid welding rod. The invention belongs to the field of welding materials and welding technology. Background technique [0002] Oxygen will react with the metal during the welding process and affect the mechanical properties of the weld metal. Therefore, alloy powder must be added to the electrode coating as a deoxidizer to protect the weld metal and the alloy elements that need to transition to the weld. At present, the acid electrodes used in the market all use ferromanganese as a deoxidizer. At the same time, because manganese is very important to ensure the mechanical properties such as low temperature toughness of the acid electrodes, ferromanganese is also used as an alloying agent. In order to ensure the manganese content of the weld, a large amount of ferromanganese must be added to the electrode coating. Excessive addition of manganese will red...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the excessive content of ferromanganese in the existing acid welding rod, low transition efficiency, low weld strength and low temperature impact toughness, and provide a high transition efficiency of manganese, low toxicity of welding smoke, Low-cost marine high-strength and high-toughness acid welding rod

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