Ultralow-hydrogen and high-tenacity metal powder core type seamless flux-cored welding wire for all-position welding

Abstract

The invention provides an ultralow-hydrogen and high-tenacity metal powder core type seamless flux-cored welding wire for all-position welding. The seamless flux-cored welding wire comprises outer skin and flux core powder, wherein the inner part of the outer skin is filled with the flux core powder, and the outer skin is a low-carbon steel band. The seamless flux-cored welding wire is characterized in that the flux core powder comprises the following components in a percent by weight: 10-15% of low-carbon ferromanganese, 15-20% of atomized ferrosilicon, 2-5% of rutile, 1-5% of cryolite, 1-3% of atomized nickel powder, 1-2% of quartz, 0.5-2% of feldspar and the balance of iron powder. The seamless flux-cored welding wire is suitable for the all-position welding of carbon steel and low-alloy steel which are welded under the protection of mixed gas containing 75-85% of Ar and 15-25% of CO2. The seamless flux-cored welding wire is great in welding machinability, stable in mechanical properties, great in crack resistance, low in hydrogen dispersion and high in moisture absorbability and can be used for all-position welding.

Description

technical field

[0001] The invention relates to the field of welding materials, in particular to an ultra-low-hydrogen high-toughness metal powder-cored seamless flux-cored welding wire for all-position welding. Background technique

[0002] Metal powder flux-cored welding wire is a new trend in international development in recent years. At present, Japan and the United States have taken the less-slag-type metal powder flux-cored welding wire as one of the focuses of research and development. Metal powder type flux cored wire is relative to slag type flux cored wire, most of its flux core is metal powder (iron powder, deoxidizer), only a small amount of arc stabilizer and slagging agent. The reason why it is evaluated as "a welding material that replaces solid wire" is that it combines the advantages of a solid wire with less slag content with the advantages of a high deposition rate, excellent weld bead formation, and a low-spatter type flux-cored wire. , and the hydrogen ...