Overlaying welding flux-cored wire for S pipe valve, glass-like plate and wear ring of concrete pump

Abstract

The invention relates to an overlaying welding flux-cored wire for an S pipe valve, a glass-like plate and a wear ring of a concrete pump. The flux-cored wire comprises the following chemical compositions in percentage by weight: 3.0 to 4.0 percent of carbon, 2.5 to 3.5 percent of vanadium, 28 to 34 percent of chromium, 2.5 to 3.5 percent of niobium, 1.0 to 3.0 percent of manganese, 0.5 to 1.5 percent of boron, 0.5 to 2.0 percent of silicon, 2.5 to 3.0 percent of rare earth, 6.0 to 8.0 percent of tungsten, 2.5 to 3.5 percent of molybdenum, and the balance of iron. The sheath is made of a low carbon steel belt, and the core part is filled with alloy powder of the compositions and is drawn into the flux-cored wire. The overlaying welding flux-cored wire manufactured according to the chemical compositions has good overlaying welding performance, nice appearance, high strength, high hardness, excellent impact resistance, good wear resistance and long service life, has hardness reaching HRC of more than or equal to 65, and is the perfect overlaying welding flux-cored wire for manufacturing and repairing the S pipe valve, the glass-like plate and the wear ring of the concrete pump in the construction industry.

Description

technical field [0001] The invention relates to a surfacing welding wire, in particular to a surfacing flux-cored welding wire used for S-pipe valves, spectacle plates and wear-resistant rings of concrete delivery pumps in the construction industry. technical background [0002] At present, the S-pipe valve, eye plate and wear-resistant ring of the concrete delivery pump manufactured in the construction industry use surfacing electrodes. Due to the continuous delivery of concrete, the above-mentioned components are severely worn and the delivery pump cannot work normally and has a short service life. The above-mentioned components of the concrete delivery pump are required to have sufficient hardness, strength, impact resistance, and good wear resistance for welding rod surfacing. And there is no surfacing welding wire of special-purpose concrete delivery pump in the prior art; Although general surfacing welding electrodes have high hardness, they have poor wear resistance a...

AI Technical Summary

Problems solved by technology

However, there is no dedicated surfacing welding wire for concrete delivery pumps in the prior art; although general surfacing welding electrodes have high hardness, they have poor wear resistance and short service life.

Therefore, the existing surfacing welding electrodes cannot meet the technical requirements of the delivery pump S pipe valve, eye plate and wear ring in the construction manufacturing industry.