High-strength gas-defended welding wire material

Abstract

The invention belongs to the full position automatic welding material making field, in particular to a high strength gas protecting welding wire of synthesis mechanics good function in the welding line by adopting the rich argon gas protecting welding. The specific ingredient weight percent of the welding wire is that C is less than 0.05 percent, Si is ranged from 0.1 percent to 0.8 percent, Mn is ranged from 0.5 percent to 2.0 percent, S is less than 0.01 percent, P is less than 0.015percent, Ni is ranged from 0.5 percent to 2.0 percent, Cr is ranged from 0.05 percent to 0.50 percent , Mo is ranged from 0.1 percent to 0.5 percent, Cu is less than 0.3 percent, Ti is ranged from 0.01 percent to 0.25 percent, Re 0.05 is ranged from percent to 0.5 percent, B is ranged from 0.001 percent to 0.030 percent and remained iron. Compared with the prior art, the invention welding wire material has fine synthesis mechanics function of reasonable, simple, economic ingredient design of the welding wire material, high strength and low temperature toughness of the welding line smelt apply metal. The invention is characterized in that the wide applicable range of CO2 content in the gas is protected and the full position automatic welding has good manufacturability.

Description

technical field [0001] The invention belongs to the field of manufacturing all-position automatic welding materials. Especially after argon-rich gas shielded welding is used, the high-strength gas shielded welding wire material with good comprehensive mechanical properties at the weld. Background technique [0002] In the prior art, the gas shielded welding wire material used in the X80 pipeline steel has unsatisfactory comprehensive mechanics, which limits the wide application of the steel. For example, the published patent (application number: 01128326.2) introduces a kind of 'micro-titanium-boron high-toughness gas-shielded welding wire'. The application of this gas-shielded welding wire is to adopt Ar+20% CO2 gas for shielded welding. It has good low-temperature toughness, but the strength of the deposited metal at the welding place cannot meet the use conditions of X80 steel. Currently, only the welding wire material of X70 strength grade steel is used. In addition, p...

AI Technical Summary

Problems solved by technology

At present, the gap between the low-temperature toughness level of welding materials and the toughness level of steel is still relatively large, and the performance of the weld in the welded structure restricts the performance of the steel and the improvement of the overall performance of the structure.

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