Duplex metal welding rod and manufacturing method thereof

Abstract

The invention discloses a duplex metal welding rod and a manufacturing method thereof. The duplex metal welding rod comprises a metal core wire and a coating, the metal core wire comprises an operating part and a clamping part which are fixedly connected, the diameter of the operating part is the same as that of the clamping part, the operating part is made from iron alloy wires, the clamping part is made from aluminum magnesium alloy wires, and the atomic ratio of aluminum and magnesium in the aluminum magnesium alloy wires is 3:2. The method comprises the steps of welding the operating part and the clamping part to form the core wire in a friction way, and coating the coating on the outer surface of the core wire. According to the duplex metal welding rod provided by the invention, the clamping part and a welded joint can be automatically separated; furthermore, the aluminum magnesium alloy is served as the clamping part, on one aspect, the clamping end planes of soldering pliers have good conductivities; meanwhile, spinel phase welding slag of MgO (Magnesium Oxide) and Al2O3 (Aluminum Oxide) is formed on a bonding interface of the clamping part when the total operating part is molten in the welding process, and the duplex metal welding rod has a stronger separating capacity from the welded joint of a molten state.

Description

technical field [0001] The invention relates to a welding rod for manual arc welding, in particular to a bimetallic welding rod 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 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 hidden weld has just been completed when the working part of the electrode burns out, the welder may simply release the clamp, leaving the electrode tip behind and solidifying at the end of the weld