Electric welding electrode

Abstract

The invention discloses an electric welding electrode which consists of a welding core, a copper pipe and a coating from inside to outside. The welding core, the copper pipe and the coating account for the following percentages of the total mass of the electric welding electrode respectively: 36 percent to 40 percent; 33 percent to 37 percent; and 23 percent to 31 percent. The welding core is made of H08A steel and the coating is the coating of a J422 welding electrode; the components of the copper pipe are as follows (account for percentages of the total mass of the copper pipe): 0.21 to 1.34 percent of C; 1.28 to 3.59 percent of Mn; 0.53 to 0.98 percent of Ni; 0.38 to 0.7 percent of Si; 0.32 to 0.7 percent of Cr; 0.86 to 2.7 percent of P; 0.075 to 0.09 percent of S; and the balance of Cu and unavoidable impurities.

Description

technical field [0001] The invention relates to a metal welding material, in particular to an electric welding rod. Background technique [0002] Cast iron is widely used, but when welding cast iron and cast iron or cast iron and ordinary carbon steel, due to the high carbon content, high brittleness and poor plasticity of cast iron itself, the residual internal stress of the weld after welding is often difficult. Elimination, so that the weld is prone to welding defects such as cracks. [0003] Structural steel electrodes (such as J422 electrodes) or nickel-based cast iron electrodes (such as Z308 electrodes) are often used in the market to weld between cast irons or between cast iron and steel. [0004] J422 is a common carbon steel electrode. This type of electrode generally uses H08A steel as the welding core, and the coating uses titanium-calcium type coating. It is generally used for welding low-carbon steel structures and low-alloy steels of the same strength level. ...

AI Technical Summary

Problems solved by technology

But because of its pure nickel core, it is expensive