A reduced titanium type titanate type flux-cored wire and a welding method thereof

By adjusting the composition and welding method of reduced titanium-type titanate flux-cored wire, the problem of high cost of titanate flux-cored wire has been solved, realizing a low-cost, high-performance welding material suitable for bridge and marine engineering fields.

CN117300429BActive Publication Date: 2026-07-21WUHAN TEMO WELDING CONSUMABLES CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN TEMO WELDING CONSUMABLES CO LTD
Filing Date
2023-09-22
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

The high cost of rutile in titanate-cored welding wires leads to low production capacity and high cost, making it difficult to meet the application requirements of demanding fields such as bridge and marine engineering.

Method used

The flux-cored welding wire uses reduced titanium and rutile as the main components. By adjusting the flux composition, including 51-55% reduced titanium, 6-8% rutile, 5-8% feldspar, 2-3% sodium fluoride, 2-4% ferrosilicon, 15-19% Mn, 4-6% magnesium-aluminum alloy, 0.025-0.045% B, with the balance being Fe and unavoidable impurities, the TiO2 and FeO content is controlled to improve the slag properties, and CO2 gas shielded welding is used.

Benefits of technology

It achieves low cost and readily available raw materials, controllable production capacity of flux-cored welding wire, excellent welding performance, beautiful weld formation, high tensile strength, excellent low-temperature impact toughness and low diffusible hydrogen content, and is suitable for all-position welding.

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Abstract

This invention relates to a reduced titanium titanate flux-cored welding wire and its welding method. The flux-cored welding wire comprises a carbon steel sheath and a flux core filled within the carbon steel sheath. The flux core comprises the following components by weight percentage: 51-55% reduced titanium, 6-8% rutile, 5-8% feldspar, 2-3% sodium fluoride, 2-4% ferrosilicon, 15-19% Mn, 4-6% magnesium-aluminum alloy, 0.025-0.045% boron, with the balance being Fe and unavoidable impurities. The flux-cored welding wire of this invention has the advantages of low cost and readily available raw materials, enabling independent control of flux-cored welding wire production capacity. Through adjustment of the flux core composition, it exhibits excellent mechanical and technological properties, with a tensile strength of deposited metal greater than 490 MPa and an elongation greater than 22%. It also possesses excellent low-temperature impact toughness at -20°C, with an average value up to 90 J, and a diffusible hydrogen content of less than 10 ml / 100 g, demonstrating excellent crack resistance.
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