Gas shielded welding wire, gas shielded welding wire steel wire rod and production method of gas shielded welding wire steel wire rod

Abstract

The invention discloses a gas shielded welding wire, a gas shielded welding wire steel wire rod and a production method of the gas shielded welding wire steel wire rod. The gas shielded welding wire steel wire rod comprises the following chemical components in percentage by mass: 0.03-0.08% of C, 0.5-1.0% of Si, 1.4-1.8% of Mn, 0.013-0.1% of S, less than or equal to 0.0015% of P, less than or equal to 0.8% of Ni, less than or equal to 0.4% of Cr, less than or equal to 0.4% of Mo and the balance of Fe and inevitable impurities. And the mass percentages of C, Si, Mn, P and S meet the conditions that the liquidus temperature TL is equal to 1537-88 [C]-8 [Si]-5 [Mn]-30 [P]-25 [S], the solidus temperature TS is equal to 1536-415 [C]-12 [Si]-6.8 [Mn]-125 [P]-184 [S], and TL-TS is greater than or equal to 25 DEG C and less than or equal to 45 DEG C. Therefore, on the basis of reasonable design of components and mass percentages thereof, the gas shielded welding wire, the gas shielded welding wire steel wire rod and the production method thereof not only reduce the desulfurization cost in the steelmaking process, but also have the advantages of good weld metal flowability, fast solidification of a welding pool, good weld formability and high production efficiency. The problem that weld metal at the twelve o'clock position flows downwards and falls during all-position welding is solved, the weld surface is uniform and smooth during all-position welding, and weld bead forming is attractive.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and relates to a gas shielded welding wire, a gas shielded welding wire steel wire rod and a production method thereof. Background technique [0002] Steel is the most widely used material among metal materials, and it is usually connected by welding, and the most commonly used welding method is gas shielded welding. [0003] In welding, the quality of the welded joint determines the quality of the welding performance. Among them, the mechanical properties and formability of the welded joint are important indicators for evaluating the quality of the welded joint, and one of the important factors affecting these two properties is the performance of the welding wire. . [0004] At present, when the welding wires used in the market are welding, especially for all-position welding such as pipelines, there is often a problem that the weld metal at the twelve o'clock position, that is, the p...

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Problems solved by technology

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a gas shielded welding wire, a gas shielded welding wire steel wire rod and a production method thereof to solve During all-position welding, the weld metal at the twelve o'clock position flows downward and falls, resulting in poor formability and uneven weld bead

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