Weather-proof gas shield welding wire capable of being welded with large current

Abstract

The invention relates to a weather-resistant gas-shielded welding wire capable of high-current welding. The chemical composition of the welding wire is: C ≤ 0.1%, Si 0.65-1.35%, Mn 1.0-2.0%, S 0.01-0.05%, P 0.01‑0.05%, Ti 0.02~0.3%, Cu 0.2‑0.5%, and the balance is Fe and impurity elements. With an inert gas mixture of 50% or more, the wire can be used for high-speed welding with a current of 300-600A and a speed of 30-60cm / min. The technology can be applied to the welding of ultra-high-strength steel plates in fields such as engineering machinery, buildings and bridges.

Description

technical field [0001] The invention relates to a weather-resistant gas-shielded welding wire, which belongs to the technical field of welding materials, in particular to a solid-core welding wire for gas-shielded welding that can adapt to high-current welding Background technique [0002] The use of weathering steel can avoid protective coating, shorten construction period and reduce production cost. At present, weather-resistant steel is gradually being applied in large-scale welded structures, such as bridges, buildings, etc.; and the large-scale application of such steel plates is inseparable from the weather-resistant gas shielded welding wire used for welding. [0003] The weather-resistant gas-shielded welding wire needs to meet the general mechanical properties, and its welded joints should have the same weather resistance as the base metal. Existing technologies 200310108200.0, 201410013357.x, 200710010787.x, 200810047484.x, 200910187781.9 and 201310057555.5 provid...

AI Technical Summary

Problems solved by technology

But the prior art has the following deficiencies: 1) It is used for welding with a current below 280A; 2) It is basically designed with Cr-Cu-Ni alloy, and the cost is high

Weather-resistant gas-shielded welding wire suitable for high-current welding above 300A has not been reported

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