550 MPa-grade flux-cored wire with excellent moisture resistance

A flux-cored wire, moisture-resistant technology, used in welding equipment, welding media, welding/cutting media/materials, etc.

Active Publication Date: 2021-06-08
WUHAN TEMO WELDING CONSUMABLES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These flux-cored wires can only meet the impact toughness requirements at temperatures above -20°C

Method used

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  • 550 MPa-grade flux-cored wire with excellent moisture resistance
  • 550 MPa-grade flux-cored wire with excellent moisture resistance

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Embodiment Construction

[0035] The following clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0036] The flux core formula of the 550MPa grade flux cored wire with excellent moisture resistance provided by Examples 1-5 is shown in Table 1. The carbon steel sheath is SPCC steel strip, which is made by conventional flux cored wire manufacturing process, and the flux core powder is used in Before manufacturing flux-cored wire, put it into a powder mixer and heat-preserve and mix powder at 270-280°C for 50-60 minutes.

[0037] See Table 2 for the chemical composition and mechanical properties of the deposited metal of the flux-c...

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Abstract

The invention belongs to the technical field of welding materials, and particularly relates to a 550 MPa-grade flux-cored wire with excellent moisture resistance. The flux-cored wire comprises a carbon steel sheath and a flux core. The flux core comprises the following components in percentage by mass: 34-42% of rutile, 2-6% of electrolytic manganese, 10-15% of silicon-manganese alloy, 14-18% of nickel powder, 2-6% of ferrotitanium, 1-5% of aluminum-magnesium alloy, 1-3% of sodium fluoride, 1-4% of zircon sand, 4-8% of ferroboron, 1-3% of potassium titanate, 2-6% of silicon iron, 1-6% of magnesium powder, 2-5% of feldspar, 1-5% of fluorinated ethylene propylene and the balance iron powder. According to the 550 MPa-grade flux-cored wire with the excellent moisture resistance, pure CO2 serves as shielding gas, the 550 MPa-grade flux-cored wire can be used in a maritime work construction working environment, the impact toughness requirement at -40 DEG C is met, the diffusible hydrogen content is lower than 5 ml / 100 g, the yield strength grade of the flux-cored wire is 460 MPa grade, the tensile strength grade reaches 550 MPa grade, and the flux-cored wire is good in cold crack resistance, extremely high in moisture absorption resistance and high in pore resistance.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a 550MPa-grade flux-cored welding wire with excellent moisture resistance. Background technique [0002] Gas-shielded flux cored wire has been more and more used in shipbuilding, ocean engineering and other industries because of its good all-position welding process performance and high welding efficiency. In addition to 355MPa grade steel in marine engineering construction, steel plates with a yield strength of 400-460MPa grade are widely used, such as E40, EH420, EH460, etc. The construction of marine engineering equipment requires the use of flux-cored wire with good low-temperature impact toughness, because of its use environment requirements , must also have excellent moisture resistance and ultra-low diffusible hydrogen content. However, most of the current flux-cored wires that can meet the impact toughness requirements at -40°C low temperature and w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/368
CPCB23K35/3066B23K35/368B23K35/3608B23K35/0266
Inventor 陈成刘东吴光辉汪涛刘飞张翔
Owner WUHAN TEMO WELDING CONSUMABLES CO LTD
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