Flux-cored wire, preparation and application thereof

Abstract

The invention discloses a flux-cored wire, which consists of a sheath and a flux core, wherein the sheath is made from low-carbon steel; the flux core is 14 to 22 percent based on the mass of the flux-cored wire; based on the total mass, the flux core comprises the following components in percentage by mass: 1.6 to 5.0 percent of TiO2, 0.4 to 1 percent of SiO2, 1.0 to 3.0 percent of Mn, 0.2 to 0.4 percent of Si, 0.20 to 0.50 percent of MgO, 0.10 to 0.20 percent of Al2O3, 0.10 to 0.20 percent of CaCO3, 0.21 to 0.41 percent of CaF2, 0.6 to 1.4 percent of Cr, 0.8 to 2.0 percent of Mo, 3 to 6 percent of Ni, 0.05 to 0.10 percent of V, 0.01 to 0.02 percent of Re, 0.15 to 0.35 percent of Mg, 0.15 to 0.35 percent of Al, and the balance of Fe. The flux-cored wire provided by the invention has the advantages of high intensity, toughness and crack resistance.

Description

technical field [0001] The invention relates to a flux-cored welding wire and its preparation and application. Background technique [0002] Flux-cored wire is a high-efficiency welding material developed in the 1950s. It not only inherits the advantages of adjustable electrode components, but also overcomes the shortcomings of non-continuous and automatic welding of electrodes. Its deposition efficiency is as high as 4 times that of electrodes. It has the advantages of beautiful weld shape and small welding deformation. [0003] With the advancement of science and technology, and the popularization and application of new processes, new materials, and new technologies, flux-cored welding wire, a new type of high-efficiency welding material, has been accepted by people for its high efficiency and excellent welding quality. Widely used in steel structure, shipbuilding and other industries. High-strength steel has the advantages of reducing weight, reducing plate thickness, a...

AI Technical Summary

Problems solved by technology

In some developed countries, high-strength steel has its matching flux-cored welding wire, but at present, most of the welding materials used for high-strength steel in my country are manual welding and gas-shielded welding solid-core welding wire, and the matching flux-cored welding wire for high-strength steel is still blank.

Images