High-strength carbon dioxide protecting surfacing flux-cored wire

Abstract

The invention discloses a high-strength carbon dioxide protecting surfacing flux-cored wire. The raw material of the wire is a common low-carbon cold rolled steel band, and the filled flux core powder accounts for 17 to 22 percent of the total weight of the wire. The flux core comprises 13 to 30 percent of rutile, 5 to 26 percent of fluoride, 3 to 14 percent of magnesia clinker, 0 to 10 percent of quartz, 2 to 8 percent of potassium feldspar, 2 to 5 percent of aluminum magnesium alloy, 14 to 33 percent of metal chrome, 5 to 15 percent of flake graphite, 2 to 5 percent of No.45 ferrosilicon, 7to 11 percent of metal manganese, 5 to 12 percent of ferromolybdenum, 0 to 6 percent of ferrovanadium, 0 to 5 percent of ferroboron, 6 to 12 percent of metal tungsten, 2 to 8 percent of rare earth and the balance of iron. In the invention, the wire welding process is advanced, the electric arc is stable during welding, all position welding is realized, slag covering is good, deslagging is easy, and the weld joint is elegant, no crack is formed after multiplayer welding, the impact resistance is high, the Rockwell hardness (HRC) of the welding layer can reach 55 to 61, and the wear resistance is high.

Description

technical field [0001] The invention relates to a technique in the field of welding, in particular to a high-hardness carbon dioxide gas shielded surfacing welding flux-cored welding wire. Background technique [0002] Surfacing welding technology is a welding process that makes the surface of parts obtain deposited metal with special properties such as wear resistance, corrosion resistance and heat resistance. It has been widely used in the manufacture and repair of parts in metallurgical machinery, mining machinery, agricultural machinery, construction machinery, petrochemical equipment, transportation, nuclear power equipment, aerospace industry and other departments. With the continuous development of the country's industrialization, urgent requirements are put forward for the development of new cemented carbide materials and corresponding surfacing materials. Compared with other welding materials, flux-cored wire has the advantages of flexible and convenient alloy...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a hard carbon dioxide gas shielded surfacing welding flux-cored wire, thereby overcoming the poor toughness of the current high-hardness surfacing welding flux-cored welding wire and the thin diameter CO 2 The problem of fewer types of gas-shielded surfacing flux-cored wires;