Mixed-gas protection high-tenacity carbon steel flux-cored wire

Abstract

The invention relates to a mixed-gas protection high-tenacity carbon steel flux-cored wire. A flux core comprises, by mass, 32% to 49% of rutile, 20% to 25% of iron powder, 14.5% to 17% of silicon manganese alloy, 1.0% to 1.5% of low-carbon ferromanganese, 2% to 4% of quartz, 2.5% to 3.5% of aluminum oxide, 2.5% to 5% of zircon sand, 2% to 3.8% of fluoride, 3% to 6% of alloy elements and 2% to 5% of rare elements. The fluoride is one or more kinds of barium fluoride, calcium fluoride and aluminum fluoride. The alloy elements are any combination of titanium, potassium, nickel and chrome. The rare elements are one or two kinds of vanadium, niobium, boron and molybdenum. According to the mixed-gas protection high-tenacity carbon steel flux-cored wire in the formula, the adding quantity of slagging components and the adding quantity of other functional components in the flux core are optimized and coordinated; as the adding amount of the silicon manganese alloy is controlled, the adding quantity of the alloy elements is reduced, and burning losses of the alloy elements are reduced, the microelements such as the boron in the formula are accurately controlled, and the mechanical property of deposited metal is more stable; particularly, the low-temperature impacting property is greatly improved, and the impacting property can further be more stable.

Description

technical field [0001] The invention relates to a metal welding flux-cored welding wire, in particular to a mixed gas protection high-toughness carbon steel flux-cored welding wire. Background technique [0002] Flux-cored wire is a new type of welding material that has developed rapidly in recent years. Flux-cored wire is widely used in aviation, aerospace, shipbuilding, nuclear power, automobile manufacturing, bridges, machinery, construction, petrochemical and other fields. Compared with manual electrode and argon arc welding wire, flux-cored wire has obvious technological advantages, mainly because it changes the intermittent welding process into a continuous production mode, thereby reducing the number of welding joints, improving the quality of welds, and improving Production efficiency, saving energy. At the same time, various welding materials for different purposes can be conveniently designed by adjusting the types and proportions of the flux core additives. Beca...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a mixed gas protected high toughness carbon steel flux cored wire in view of the low temperature impact performance of the current flux cored wire which is generally low and not stable enough.

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