A wear-resistant surfacing flux-cored welding wire

Abstract

The invention belongs to the technical field of welding materials, and particularly relates to a wear-resistant surfacing flux-cored wire. The flux-cored wire is prepared by coating flux core powder with a low-carbon cold-rolled steel strip; a flux core is prepared from components in percentage by mass as follows: 1.0%-1.8% of nano diamond, 2.0%-4.0% of nano aluminum oxide, 2.5%-5.0% of low-carbonferrochromium, 4.0%-6.0% of ferromolybdenum, 3.0%-6.0% of ferronickel, 2.0%-4.0% of ferroboron, 1.5%-3.0% of ferroniobium, 2.0%-5.0% of ferrosilicon, 5.0%-8.0% of ferromanganese, 5.0%-10.0% of feldspar, 2.0%-5.0% of cryolite, 4.0%-8.0% of titanium dioxide, 2.0%-5.0% of zirconite and the balance of reduced iron powder FHT100*25; the particle size of the nano diamond ranges from 30 nm to 80 nm; theparticle size of the nano aluminum oxide ranges from 40 nm to 100 nm; the mass of the flux core accounts for 20%-35% of the total mass of the flux-cored wire; and the diameter of the wire ranges from1.2 mm to 2.4 mm.

Description

technical field [0001] The invention relates to the field of welding materials, in particular to a wear-resistant surfacing flux-cored welding wire. [0002] technical background [0003] Wear is one of the main causes of mechanical failure. With the development of modern industry, the requirements for the wear resistance of materials in the use of mechanical equipment and its parts are getting higher and higher, and its service life has become more and more affecting the production efficiency of mechanical equipment. more important factor. For example, vertical mill rollers and discs and squeeze rollers in cement plants, coal mill rollers and discs in thermal power plants, crusher hammers and drums, and shovel teeth of excavators cannot be used due to local wear and damage during use. , the loss is huge. [0004] Surfacing welding technology is a commonly used surface modification and repair method, which is mainly used in cement, steel, electric power, mining and other in...

AI Technical Summary

Problems solved by technology

However, nano-scale graphene, nano-scale chromium carbide, and nano-scale rare earth are added to the drug core formula, and the preparation cost is high, especially graphene and rare earth. production is limited

[0007] Chinese patent CN105798484B discloses a high-carbon, high-chromium, high-vanadium wear-resistant surfacing self-shielding flux-cored wire, in which the mass percentages of high-carbon ferrochrome chemical components are: 5%~25%, chromium carbide 30%~60% , graphite 1%~5%, which results in a high value of carbon content. Although the hardness is increased to a certain extent, the patent text does not disclose how to avoid the relatively coarse grains and microstructure in the weld when the carbon content is high. The problem of uneven distribution, and the use of the affinity of vanadium and carbon to generate extremely fine carbides VC and V 2 C, but there is no mention of what measures to use to make it evenly distributed, and the remaining C will still form coarse grains, and the patent text does not propose a treatment method, so the paragraph 0012 in the patent text will not reduce the surfacing There is no corresponding scientific basis for the toughness of the alloy

[0008] Chinese patent CN106041364B discloses a wear-resistant surfacing welding flux-cored wire, the average hardness is in the range of 45~58HRC, which can meet the wear-resisting requirements under certain working conditions, but cannot meet the grinding rollers, grinding discs and extrusion rollers of cement plant vertical mills , Coal mill grinding rollers and grinding discs in thermal power plants, crusher hammers and drums, excavator shovel teeth, etc. require more than 60HRC

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