Low alloy steel welding rod and manufacturing method thereof

Abstract

The invention discloses a low alloy steel welding rod. The low alloy steel welding rod comprises a metal welding core and a covering, wherein the metal welding core comprises a working part and a clamping part which are fixedly connected; the diameters of the working part and the clamping part are the same; the working part is an iron alloy wire; the clamping part is an aluminum magnesium alloy wire; the atomic ratio of aluminum to magnesium in the aluminum magnesium alloy wire is 3:2; the covering comprises the following components in parts by weight: 1-2 parts of feldspar, 2-5 parts of synthetic mica, 6-8 parts of rutile, 5-10 parts of fluorite, 2-4 parts of electrolytic manganese, 1-3 parts of sodium carbonate, 6-8 parts of nickel powder, 1-3 parts of zircon sand, 13-16 parts of iron powder and 30-40 parts of marble serving as a base. The components of the covering are rational, the quality of a weld joint can be effectively improved, and full combustion of the welding rod can be realized; automatic separation of a discharge electrode can be realized when the welding rod is used up, so the remaining of the discharge electrode is completely avoided, and the welding rod is particularly suitable for manual electric arc welding of a complex structure.

Description

technical field

[0001] The invention relates to an electrode for manual arc welding, in particular to a low-alloy 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 gas-slag combined protection metal 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 bonding interface between the workpieces. It has the advantages of good flexibility, convenient operation, low assembly requirements before welding, and simple equipment. Therefore, although automatic welding equipment such as gas shielded welding machines and welding robots have been widely used in steel structure manufacturing, traditional arc welding with electrodes is still required for manual welding in some complex welds.

[0003] The tool usually used in manual arc weldi...