Stainless steel welding rod and manufacturing method thereof

Abstract

The invention discloses a stainless steel welding rod and a manufacturing method thereof. The stainless 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 working part and the clamping parts have same diameter; the working part is an iron alloy wire; the clamping part is an aluminum-magnesium alloy wire; the working part comprises the following components in percentage by weight: smaller than or equal to 0.03 percent of C, 0.4-1.2 percent of Mn, 0.5-1.0 percent of Si, 13-15 percent of Cr, 5-6 percent of Ni and the balance of iron and inevitable impurities. According to the method, the working part and the clamping part are in friction welding to form the welding core, and the outer surface is coated with the covering. The stainless steel welding rod can realize automatic separation of the clamping part and a weld joint. The material of the covering of the working part is improved to be more suitable for welding of stainless steel to adapt to welding of various containers and pipelines in the fields such as chemical industry, energy sources and foods.

Description

technical field [0001] The invention relates to a covered electrode for arc welding, in particular to a stainless 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...

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