A high-performance flux-cored welding wire

Abstract

The invention discloses a high-performance flux-cored wire which comprises a mild-carbon steel strip outer skin and a flux core, wherein the flux core is prepared from the following raw materials in weight percent: 3-5% of titanium dioxide, 1-5% of silicon dioxide, 1-5% of calcium carbonate, 1-2% of magnesia, 1-5% of sodium hexafluorozirconate, 0.5-3% of boron carbide, 1-5% of zirconium oxide, 0.1-2% of cobaltous oxide, 3-12% of manganese powder, 1-3% of nickel powder, 2-10% of chromium powder, 0.5-1.5% of molybdenum powder, 0.5-2% of vanadium powder, 0.05-0.5% of iron-cerium alloy, 1-5% of tungsten powder, 0.1-0.9% of copper powder, 1-3% of ferroboron, 0.2-1% of aluminite powder, 3-10% of Fe-Ti composite powder, 2-8% of silicon iron and the balance of iron powder. The high-performance flux-cored wire is stable in electric arc and slightly splashes; an obtained coating has high bonding strength with a substrate and is excellent in impact toughness and crack resistance; and soldering seam formation is attractive.

Description

A high-performance flux-cored welding wire technical field The invention relates to the field of welding wire technology, in particular to a high-performance flux-cored welding wire. Background technique Due to the higher deposition efficiency compared with solid wire, flux cored wire has been widely used in many fields, such as large structural industries such as shipbuilding and marine engineering, to reduce costs. At present, there are various types of flux-cored welding wires, but in the actual application process, there are still uneven powder feeding, instability, and uneven melting degree. The coating obtained by spraying on the substrate has low bonding strength, high porosity, and poor toughness. Layers are prone to cracking. Contents of the invention Based on the technical problems existing in the background technology, the present invention proposes a high-performance flux-cored welding wire, which has a stable arc, less spatter, high bonding strength betwee...

AI Technical Summary

Problems solved by technology

At present, there are various types of flux-cored welding wires, but in the actual application process, there are still uneven powder feeding, instability, and uneven melting degree. The coating obtained by spraying on the substrate has low bonding strength, high porosity, and poor toughness. The phenomenon that the layer is easy to crack