High-strength solid wire made of weathering resistant steel through gas shielded welding

Abstract

The invention discloses a high-strength solid wire made of weathering resistant steel through gas shielded welding. Chemical compositions of the solid wire include, by weight percentage, 0.05 to 0.15 of C, 1.65 to 2.10 of Mn, 0.40 to 0.80 of Si, smaller than or equal to 0.010 of S, smaller than or equal to 0.015 of P, 0.25 to 0.55 of Cu, 0.90 to 1.25 of Cr, 0.65 to 0.95 of Ni, 0.12 to 0.18 of Ti, 0.02 to 0.10 of Nb and the balance iron and other impurities. Deposited metal and welding connectors obtained through the solid wire have good atmospheric corrosion resistance. The solid wire has the advantages of being high in strength, high in weathering resistance and the like. Meanwhile, the solid wire has good comprehensive performance, the extension strength of the solid wire is larger than or equal to 680MPa, the yield strength of the solid wire is larger than or equal to 550MPa, the elongation of the solid wire is larger than or equal to 22%, and low-temperature impact Akv at 40 DEG C below zero is larger than or equal to 148J.

Description

technical field [0001] The invention belongs to the field of welding materials, in particular to a high-strength, high-toughness, atmospheric corrosion-resistant steel gas-shielded solid welding wire with a tensile strength of deposited metal ≥ 680 MPa. Background technique [0002] At present, with the development of science and technology, my country's rail transit, high-speed locomotives, railway vehicles, construction machinery, bridges, containers, etc. have been used in different regions, different climates, and different seasons, and the strength level has also been continuously improved. From the original Tensile strength ≥ 500MPa, has been increased to ≥ 550, ≥ 600MPa level, especially the continuous improvement of the speed and load capacity of rolling stock in my country, the increase of bridge construction, the large number of applications of containers, the atmospheric corrosion resistance (weathering steel) welding wire Higher requirements are also put forward. I...

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Problems solved by technology

At present, Chinese patent 200810047484X discloses a 600MPa-level gas-shielded welding wire. Although the strength of the welding wire has been improved, it cannot stably meet the strength requirements of ≥680MPa, and the ratio of various corrosion-resistant alloy elements is not ideal. At the same time, the weather resistance is also poor. not ideal

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