Flux-cored wire

Abstract

The invention discloses a flux-cored wire, and belongs to the technical field of flux-cored wires. The flux-cored wire comprises an outer skin and a flux core filling the interior of the outer skin, wherein the flux core comprises, in percentage by weight, 4.5%-6.5% of chromium, 1.2%-1.8% of molybdenum, 0.8%-1.0% of nickel, 3.5%-4.5% of niobium, 1.5%-2.0% of manganese, 0.5%-0.8% of titanium, 1.5%-2.0% of silicon and the balance iron and inevitable impurities. The flux-cored wire has the advantages of being wide in application range, resistant to heat and abrasion, high in hardness, good in impact resistance and capable of meeting the requirements for abrasion-resistant welding wire materials in actual production.

Description

Technical field [0001] The invention belongs to the technical field of flux-cored welding wires, and specifically relates to a flux-cored welding wire. Background technique [0002] The use of wear-resistant, heat-resistant, and impact-resistant surfacing materials, matching appropriate submerged arc fluxes, and submerged arc surfacing technology to re-repair various decommissioned metallurgical rolls are currently the most widely used technology for roll repair in the world. It belongs to the category of green remanufacturing. In particular, the application of the repair of profiled steel pass rolls greatly reduces the cost of rolling steel and saves a lot of precious metals such as chromium, molybdenum and vanadium. [0003] In the process of repair and remanufacturing, the applicability of surfacing welding consumables is very important and determines the service life of the roll after repair. Conventional repairs generally use welding materials such as 3Cr13, 6Cr13, 25Cr3Mo2Mn...

AI Technical Summary

Problems solved by technology

[0003] In the repair and remanufacturing process, the applicability of surfacing welding consumables is very important, which determines the service life of the repaired roll. Conventional repairs generally use 3Cr13, 6Cr13, 25Cr3Mo2MnVA or 30CrMnSi and other welding consumables. Although such welding consumables can be compared The base material increases the rolling capacity by 30-60%, but the repaired rolls often cannot meet the production needs, especially when rolling low-temperature steel or alloy steel with special requirements, due to the high hardness of the rolled material, there is a high impact on the rolling groove. requirements, the above welding consumables cannot meet the production requirements