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A high-strength and high-toughness gas-shielded flux-cored welding wire for bridge steel

A flux-cored welding wire and bridge technology, applied in welding equipment, welding medium, welding equipment, etc., can solve the problems that the welding wire cannot meet the requirements of engineering use, and achieve excellent performance, good crack resistance, and low diffusible hydrogen content.

Active Publication Date: 2018-12-14
TIANJIN YONGCHANG WELDING WIRES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing welding wire cannot meet the engineering requirements of this type of steel plate. In order to match the welding work of high-performance Q500qE steel plate, it is necessary to develop a special gas-shielded flux-cored welding wire for this bridge steel.

Method used

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  • A high-strength and high-toughness gas-shielded flux-cored welding wire for bridge steel
  • A high-strength and high-toughness gas-shielded flux-cored welding wire for bridge steel
  • A high-strength and high-toughness gas-shielded flux-cored welding wire for bridge steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A high-strength and high-toughness gas-shielded flux-cored welding wire for bridge steel, the flux core includes the following components in weight fractions: 42% rutile, 4% feldspar, 2.5% quartz, 1.5% zirconium quartz, 1.5% sodium fluoride, and fluorine Lithium 0.4%, potassium sodium arc stabilizer 3%, silicon-manganese alloy 16%, metal manganese 3%, magnesium powder 3%, nickel powder 9%, titanium iron 0.4%, boron iron 0.2%, and the balance is iron powder, The weight fractions of the above ingredients add up to 100%.

[0019] The mass fraction of titanium dioxide contained in the rutile is 95%.

[0020] The outer skin is an SPCC-SD cold-rolled low-carbon steel strip.

[0021] The ratio of the flux core to the total weight of the welding wire is 17%.

[0022] Welding wire deposited metal composition detection, its weight percentage is carbon 0.042%, sulfur 0.006%, manganese 1.49%, silicon 0.38%, phosphorus 0.013%, chromium 0.019%, nickel 1.32%, molybdenum 0.007%, vana...

Embodiment 2

[0026] A high-strength and high-toughness gas-shielded flux-cored welding wire for bridge steel, the flux core includes the following components by weight: 40% rutile, 5% feldspar, 3% quartz, 2% zirconium quartz, 2% sodium fluoride, and fluorine Lithium 0.6%, potassium sodium arc stabilizer 4%, silicon manganese alloy 18%, metal manganese 4%, magnesium powder 4%, nickel powder 10%, titanium iron 0.6%, boron iron 0.3%, the balance is iron powder, The weight fractions of the above ingredients add up to 100%.

[0027] The mass fraction of titanium dioxide contained in the rutile is 95%.

[0028] The outer skin is an SPCC-SD cold-rolled low-carbon steel strip.

[0029] The ratio of the flux core to the total weight of the welding wire is 15%.

[0030] Welding wire deposited metal composition detection, its weight percentage is carbon 0.043%, sulfur 0.007%, manganese 1.52%, silicon 0.40%, phosphorus 0.012%, chromium 0.018%, nickel 1.35%, molybdenum 0.008%, vanadium 0.013%, and th...

Embodiment 3

[0034] A high-strength and high-toughness gas-shielded flux-cored welding wire for bridge steel, the flux core includes the following components in weight fractions: 37% rutile, 5% feldspar, 3.5% quartz, 2.5% zirconium quartz, 2.5% sodium fluoride, and fluorine Lithium 0.8%, potassium sodium arc stabilizer 4%, silicon manganese alloy 19%, metal manganese 5%, magnesium powder 5%, nickel powder 11%, titanium iron 0.8%, boron iron 0.5%, the balance is iron powder, The weight fractions of the above ingredients add up to 100%.

[0035] The mass fraction of titanium dioxide contained in the rutile is 95%.

[0036] The outer skin is an SPCC-SD cold-rolled low-carbon steel strip.

[0037] The ratio of the flux core to the total weight of the welding wire is 13%.

[0038] Welding wire deposited metal composition detection, its weight percentage is carbon 0.048%, sulfur 0.007%, manganese 1.57%, silicon 0.43%, phosphorus 0.013%, chromium 0.021%, nickel 1.34%, molybdenum 0.009%, vanadiu...

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Abstract

The invention provides a high-strength and high-toughness gas shielded flux-core wire used for bridge steel. The high-strength and high-toughness gas shielded flux-core wire comprises a skin and a flux core wrapped by the skin. The flux core comprises, by weight, 30%-50% of rutile, 2%-8% of feldspar, 1%-6% of quartz, 0.5%-5% of zircon, 0.5%-5% of sodium fluoride, 0.1%-1.5% of lithium fluoride, 1%-8% of potassium-sodium arc stabilizers, 10%-25% of silicon-manganese alloys, 1%-8% of manganese metal, 1%-6% of magnesium powder, 5%-15% of nickel powder, 0.1%-1.5% of ferrotitanium, 0.05%-0.6% of ferroboron, and the balance iron powder, and the weight percents of the ingredients add up to 100%. According to the high-strength and high-toughness gas shielded flux-core wire used for the bridge steel, all the gradients and properties of the wire can meet the engineering using requirements of high-strength steel plates, and the wire is especially suitable for welding of Q500qE.

Description

technical field [0001] The invention belongs to the technical field of welding materials, in particular to a high-strength and high-toughness gas-shielded flux-cored welding wire for bridge steel. Background technique [0002] In order to increase the strength of bridges, more and more projects use high-strength steel plates. For example, the major domestic bridge project Hutong Yangtze River Bridge uses high-strength steel plate grades Q500qE, and many technical indicators are higher than GB / T 714-2008 " Structural Steel for Bridges" requirements. [0003] However, the existing welding wire cannot meet the engineering requirements of this type of steel plate. In order to match the welding work of high-performance Q500qE steel plate, it is necessary to develop a special gas-shielded flux-cored welding wire for this bridge steel. Contents of the invention [0004] In view of this, the present invention aims to propose a high-strength and high-toughness gas-shielded flux-co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/368B23K35/30B23K9/16B23K101/18B23K101/28B23K103/04
CPCB23K9/16B23K35/0266B23K35/3053B23K35/3608B23K35/368B23K2101/18B23K2101/28B23K2103/04
Inventor 李华军徐向军侯杰昌贝玉成
Owner TIANJIN YONGCHANG WELDING WIRES
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