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Gas protection welding wire for high-strength weathering steel and steel for gas protection welding wire

A technology of gas-shielded welding wire and weather-resistant steel, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of high cost and dependence on imports, and achieve beautiful shape, small spatter, and excellent welding process performance Effect

Inactive Publication Date: 2015-12-30
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent with the publication number CN102441745A proposes a weather-resistant gas-shielded welding wire for high-speed train bogies. The weather-resistant gas-shielded welding wire of the bogie has been dependent on imports, and the cost is high. The welding wire has a certain weather resistance, but it is only suitable for welding steel with a strength lower than 500MPa

Method used

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  • Gas protection welding wire for high-strength weathering steel and steel for gas protection welding wire
  • Gas protection welding wire for high-strength weathering steel and steel for gas protection welding wire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The basic chemical composition of the steel for gas shielded welding wire for high-strength weathering steel is (weight percent):

[0019] C: 0.02%; Mn: 1.05%; Si: 0.44%; Ni: 0.82%; Cu: 0.25%; Cr: 0.01%; Nb: 0.066%; S: 0.004%; P: 0.011%; unavoidable impurities.

[0020] The basic chemical composition of the gas-shielded welding wire for high-strength weathering steel is (weight percent):

[0021] C: 0.02%; Mn: 1.05%; Si: 0.44%; Ni: 0.82%; Cu: 0.36%; Cr: 0.01%; Nb: 0.066%; S: 0.004%; P: 0.011%; unavoidable impurities.

[0022] The conventional electroless plating technology is used to plate copper on the surface of the above welding wire, and the copper plating layer accounts for 0.11% of the total weight of the welding wire.

Embodiment 2

[0024] The basic chemical composition of the steel for gas shielded welding wire for high-strength weathering steel is (weight percent):

[0025] C: 0.042%; Mn: 1.10%; Si: 0.42%; Ni: 0.85%; Cu: 0.22%; Cr: 0.01%; Nb: 0.056%; S: 0.0034%; P: 0.010%; unavoidable impurities.

[0026] The basic chemical composition of the gas-shielded welding wire for high-strength weathering steel is (weight percent):

[0027] C: 0.042%; Mn: 1.10%; Si: 0.42%; Ni: 0.85%; Cu: 0.35%; Cr: 0.01%; Nb: 0.056%; S: 0.0034%; P: 0.010%; unavoidable impurities.

[0028] Copper is plated on the surface of the above welding wire by conventional electroless plating technology, and the copper plating layer accounts for 0.13% of the total weight of the welding wire.

Embodiment 3

[0030] The basic chemical composition of the steel for gas shielded welding wire for high-strength weathering steel is (weight percent):

[0031] C: 0.044%; Mn: 1.40%; Si: 0.64%; Ni: 0.84%; Cu: 0.19%; Cr: 0.01%; Nb: 0.049%; S: 0.0043%; P: 0.011%; unavoidable impurities.

[0032] The basic chemical composition of the gas-shielded welding wire for high-strength weathering steel is (weight percent):

[0033] C: 0.044%; Mn: 1.40%; Si: 0.64%; Ni: 0.84%; Cu: 0.33%; Cr: 0.01%; Nb: 0.049%; S: 0.0043%; P: 0.011%; unavoidable impurities.

[0034] The conventional electroless plating technology is used to plate copper on the surface of the above-mentioned welding wire, and the copper plating layer accounts for 0.14% of the total weight of the welding wire.

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Abstract

The invention provides a gas protection welding wire for high-strength weathering steel and steel for the gas protection welding wire. The steel for the gas protection welding wire comprises 0.015-0.08% of C, 0.70-1.50% of Mn, 0.20-0.80% of Si, 0.50-1.30% of Ni, 0.1-0.4% of Cu, 0.03-0.10% of Nb, 0.20% or less of Cr, 0.015% or less of S and 0.020% or less of P. The welding wire comprises 0.015-0.08% of C, 0.70-1.50% of Mn, 0.20-0.80% of Si, 0.50-1.30% of Ni, 0.15-0.50% of Cu, 0.03-0.10% of Nb, 0.20% or less of Cr, 0.015% or less of S and 0.020% or less of P. A copper plating layer is arranged on the surface of the welding wire, and the content of Cu accounts for 0.05-0.25% of the total weight of the welding wire. The welding wire is used for welding of steel of 600 MPa; when 80% Ar and 20% CO2 protection is adopted, deposited metal ReL is larger than or equal to 500 MPa, Rm is larger than or equal to 600 MPa, A is larger than or equal to 25%, and AKv at the temperature below -40 DEG C is larger than or equal to 40 J. The welding wire has the excellent welding technological performance, and is stable in welding arc, small in splashing, free of air hole, attractive in appearance and applicable to all-position welding.

Description

technical field [0001] The invention belongs to the technical field of welding materials, in particular to steel and welding wire for gas-shielded welding wire for high-strength weather-resistant steel, and is especially suitable for welding steel and welding wire for gas-shielded welding wire with high strength and high weather resistance requirements. Background technique [0002] Gas shielded welding has the advantages of high production efficiency, good welding processability, low welding cost, energy saving, adaptability to all-position welding, easy automation, and good weld quality. It has been widely used in construction machinery, vehicles and ships, railway bridges, Welding production of important structural parts such as high-rise buildings and pressure vessels. In recent years, with the continuous development of smelting technology and the application of controlled rolling, controlled cooling and microalloying elements, the properties of steel are developing towa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/36
Inventor 魏世同刘仁东吕冬林利徐荣杰陆晓峰
Owner ANGANG STEEL CO LTD
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