Self-protection flux-cored wire for downward welding and horizontal position welding

Abstract

The invention discloses a self-protection flux-cored wire for downward welding and horizontal position welding and provides a self-protection flux-cored wire through which the plasticity of welding line metal of the self-protection flux-cored wire can be improved, the splash degree is reduced, downward welding and horizontal position welding are facilitated and the slag removal performance and the weld molding are improved. According to the technical scheme, the flux core of the self-protection flux-cored wire comprises the following components by weight percent: 3-10 percent of manganese, 1-4 percent of nickel, 1-5 percent of aluminum, 1-9 percent of magnesium, 10-20 percent of carbonate, 1-10 percent of fluoride, 1-7 percent of titanium dioxide, 7-10 percent of magnesium oxide, 3-13 percent of silicon dioxide and 25-50 percent of iron powder. The self-protection flux-cored wire has the advantages that the plasticity and the strength are good, the splash is slight, only fine particles splash, the welding performances of downward welding and horizontal position welding are excellent, the slag removal performance and the weld molding property are obviously improved, the S element content of the deposited metal is extremely low, and the hot crack resistance is excellent.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and relates to a flux-cored welding wire, in particular to a self-shielding flux-cored welding wire for flat welding and horizontal welding. Background technique [0002] Self-shielded flux cored wire has the advantages of easy operation, high welding efficiency, low overall cost, strong wind resistance, more suitable for field operations than gas shielded wire, good welding process performance, and good quality of welded joints, so it has been widely used. However, adding a large amount of deoxidizing agent and denitrifying agent to the usual formula at present will reduce the plasticity of the weld; or adding a large amount of fluoride to protect the arc from air intrusion, but the addition of a large amount of fluoride will cause the welding effect to deteriorate and spatter Disadvantages such as large particles, uneven weld bead during flat welding and horizontal welding, and poor s...

AI Technical Summary

Problems solved by technology

However, adding a large amount of deoxidizing agent and denitrifying agent to the usual formula at present will reduce the plasticity of the weld; or adding a large amount of fluoride to protect the arc from air intrusion, but the addition of a large amount of fluoride will cause the welding effect to deteriorate and spatter Disadvantages such as large particles, uneven weld bead during flat welding and horizontal welding, poor slag removal

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