A flux-cored wire with good toughness and high hardness

Abstract

The invention discloses a high-tenacity high-hardness flux-cored wire. The high-tenacity high-hardness flux-cored wire is formed by wrapping a low-carbon cold-rolled steel strip sheath around the outer side of a flux core. The flux core comprises the raw materials including, by weight, 30-40 parts of high-carbon ferrochrome, 5-15 parts of chrome, 11-25 parts of rare earth fluoride, 1-2.8 parts of calcium carbonate, 1-4 parts of ferromolybdenum, 1-4 parts of ferrovanadium, 6-10 parts of cobalt powder, 2-6 parts of electrolytic manganese, 1-1.8 parts of graphite, 6-10 parts of nickel-chromium alloy, 0.5-1.5 parts of tungsten powder, 2-8 parts of aluminum oxide, 9-14 parts of titanium diboride powder, 6-8 parts of low-silicon iron, 1-5 parts of feldspar, 1-2 parts of magnesite and 100-180 parts of iron powder. The high-tenacity high-hardness flux-cored wire is reasonable in chemical component ratio and high in tenacity and corrosion resistance, and the hardness of a welded joint is high.

Description

technical field [0001] The invention relates to the technical field of flux-cored welding wire, in particular to a flux-cored welding wire with good toughness and high hardness. Background technique [0002] Surfacing welding is an economical and fast process for material surface modification, which can effectively change the wear resistance, corrosion resistance and other mechanical properties of the material surface, and is beneficial to improving the service life of parts, rational use of materials, and improvement of product performance. , Cost reduction has a significant effect, and it is more and more widely used in the manufacture and repair of mechanical parts. The welding quality and welding efficiency are determined by the welding material and welding process, especially the welding material is the key to welding, the surfacing material is an important factor affecting the wear resistance of the surfacing alloy, and the production efficiency of the flux-cored wire ...

AI Technical Summary

Problems solved by technology

[0003] At present, the repair of wear-resistant parts is mainly welded by wear-resistant surfacing welding flux-cored welding wire. At present, the chemical composition ratio of wear-resistant surfacing welding flux-cored welding is unreasonable, and the toughness, welded joint hardness and corrosion resistance are low, so that the surfacing alloy Can not meet the use requirements, resulting in the life of metal components is not high