1000 MPa-level high-strength all-position ultra-low hydrogen flux-cored wire and welding method thereof

A flux-cored wire, high-strength technology, used in welding media, welding equipment, welding equipment, etc., to achieve good all-position adaptability, excellent process performance, and high joint safety.

Active Publication Date: 2017-08-18
WUHAN TEMO WELDING CONSUMABLES CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

[0003] However, the use of ultra-high-strength steel plates poses a greater challenge to welding technology. It is required to select welding materials with matching strength, and have good welding performance, crack

Method used

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  • 1000 MPa-level high-strength all-position ultra-low hydrogen flux-cored wire and welding method thereof
  • 1000 MPa-level high-strength all-position ultra-low hydrogen flux-cored wire and welding method thereof
  • 1000 MPa-level high-strength all-position ultra-low hydrogen flux-cored wire and welding method thereof

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Embodiment 1000

[0034] Embodiment 1000MPa level high-strength all-position ultra-low hydrogen flux-cored welding wire carbon steel sheath adopts low S, P carbon steel steel strip, its chemical composition and content account for the mass percentage of steel strip as shown in Table 1; in this carbon steel sheath Fill the core powder with a filling rate of 15-19%. After drawing and reducing the diameter, it is made into a finished welding wire with a diameter of 1.0-1.4mm. The core components and their mass percentages in the core are as follows: Table 2 shows.

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Abstract

The invention provides a 1000 MPa-level high-strength all-position ultra-low hydrogen flux-cored wire which comprises a carbon steel sheath and a flux core. The flux core comprises the ingredients of, in percentage by mass, 2-4% of SrCO3, 3-6% of CaF2, 25-35% of TiO2, 3-10% of feldspar, 2-5% of Si-Fe; 2-5% of Mg, 0.2-0.5% of C, 0.4-1.0% of Zr-Fe, 8-15% of Mn, 3-6% of Cr, 18-20% of Ni, 3-7% of Mo, 1.5-3% of Fe3O4 and the balance Fe of the total amount of the flux core. A titanium alkali type slag system is adopted for the flux-cored wire, a slagging constituent and an arc stabilizing substance are added into the flux core, molten slag can completely cover weld metal, the tensile strength Rm of the deposited metal is larger than or equal to 980 MPa, the elongation rate A is larger than or equal to 13%, the deposited metal charpy impact KV2 (-60 DEG C) is larger than or equal to 34 J, and the 1000 MPa-level high-strength all-position ultra-low hydrogen flux-cored wire is suitable for all-position welding.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a 1000MPa-level high-strength all-position ultra-low hydrogen flux-cored welding wire and a welding method thereof, which can be applied to 1000MPa-level low-alloy high-strength steel welding. Background technique [0002] With the continuous development of steelmaking technology, steel companies have developed steel grades with ultra-high strength and high plasticity and toughness by using refining technology, micro-alloying technology, and controlled rolling and controlled cooling (TMCP) technology. Especially since entering the 21st century, my country's low The research and development of high-strength alloy steel has entered a stage of rapid development. World-leading steel grades with a tensile strength of 400-1000 MPa have been continuously developed and widely used in construction machinery, marine structures, bridge construction and other fields. [...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/368B23K9/16
CPCB23K9/16B23K35/3033B23K35/368
Inventor 刘玉双黄会强田海成张亚平李磊桂建平杨恒闯韩海峰
Owner WUHAN TEMO WELDING CONSUMABLES CO LTD
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