Flux-cored wire for wear-resistant coating of dredging pipeline and preparation method of flux-cored wire

By using flux-core welding wire of specific components on the dredged pipe for arc welding, a high hardness and wear resistance surfacing layer is formed, which solves the problem of cracks, deformation and insufficient bonding force in the welding process of traditional coating materials, and achieves high-efficiency wear resistance and long life of the welding layer.

CN119635080AActive Publication Date: 2025-03-18JIANGSU JUXIN PETROLEUM STEEL PIPE
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Patent Information

Application Number
CN202411875074.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-19
Publication Date
2025-03-18
Estimated Expiration
2044-12-19

AI Technical Summary

Technical Problem

Traditional wear-resistant coating materials are prone to cracks, deformation and insufficient bonding during welding, which affects the coating performance and life. The hardness of iron-based wear-resistant welding wires on the market is generally insufficient, and the prepared coatings are prone to cracking.

Method used

It adopts an wear-resistant coating flux core welding wire specially designed for dredging pipelines. The flux core consists of Cr, C, Ti, Ni, TiC, Mn, Si, B and other components, and forms a high hardness and high wear resistance surfacing layer through arc surfacing technology.

Benefits of technology

It significantly improves the hardness and wear resistance of the welding layer, extends the service life, reduces maintenance costs, and improves the efficiency and safety of the project.

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Abstract

The invention discloses a flux-cored wire for a wear-resistant coating of a dredging pipeline and a preparation method of the flux-cored wire, the flux-cored wire is composed of an outer skin and a flux core, and when the flux-cored wire is used for robot MIG, the flux-cored wire has excellent mechanical properties and good hardness. Flux core alloy components of the metal type flux-cored wire are composed of the following components in percentage by mass: 16.0%-18.0% of Cr, 4.3%-8.0% of C, 5.43%-9.0% of Ti, 1.9%-3.0% of Ni, 15.0%-20.0% of TiC, 1.3%-1.5% of Mn, 0.4%-0.5% of Si, 4.6%-7.85% of B and the balance of Fe and inevitable impurities, and the sum of the mass percentages of the components is 100%. In the working process, the hardness of a cladding layer can reach 59 HRC to the maximum, and the shearing performance of the cladding layer and base metal can reach 620 MPa.
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