Carbon steel welding rod and manufacturing method thereof

Abstract

The invention discloses a carbon steel welding rod and a manufacturing method thereof. The carbon steel welding rod comprises a metal core and a coating. The metal core comprises a work part and a clamping part which are fixedly connected. The outer surface of the work part is coated with the coating, the coating contains 17.0-20.0% of magnetite, 13.0-14.0% of ferromanganese, 12.0-16.0% of starch, 4.0-6.0% of ilmenite, 6.0-8.0% of rutile, 5.0-7.0% of magnesia, 4.0-7.0% of manganese carbonate, 1.0-2.0% of magnesuim-aluminium alloy and the balance microcrystalline cellulose. The work part is made of iron alloy wires, and the clamping part is made of copper-coated aluminum wires. The method includes the step that the work part and the clamping part are coated with the coating after rubbing with each other and being welded. According to the structure of copper-coated aluminum, on one hand, the clamping portion of welding tongs has good conductivity; meanwhile, oxidation failure of the clamping portion is also effectively avoided; moreover, color of a copper-coated layer has remarkable identifiability compared with a welding rod coating and a steel structure.

Description

Technical field [0001] The invention relates to an electrode for manual arc welding, in particular to a carbon steel electrode and a manufacturing method thereof. Background technique [0002] Electrode arc welding is the most widely used welding method in industrial production. It belongs to the gas-slag combined protection molten electrode arc welding. Its principle is to use the heat generated by arc discharge to melt the electrode and the workpiece and form a weld after condensation. , So as to obtain a firm interface between the workpieces. It has the advantages of good flexibility, convenient operation, low pre-welding assembly requirements, and simple equipment. Therefore, although automatic welding equipment such as gas shielded welders and welding robots have been widely used in the manufacture of steel structures, manual welding of traditional electrode arc welding is still required in some complex welds. [0003] The tool usually used in manual arc welding is a welding...

AI Technical Summary

Problems solved by technology

[0004] In complex large-scale steel structures such as cranes, offshore drilling platforms and ships, the special position of some welds makes their welding and inspection very difficult

If a concealed weld has just been completed when the working part of the electrode burns out, the welder may release the welding tongs directly, causing the electrode tip to remain and solidify at the end of the weld, and there is a risk that the electrode tip will fall off and get stuck in the mechanical device