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Solid welding wire for high-toughness structural steel

A technology of solid welding wire and structural steel, applied in welding medium, welding equipment, welding equipment, etc., can solve the problems that cannot meet the needs of gas shielded welding of low-alloy high-strength steel plates, is not suitable for large-scale promotion, and has a single variety. Rolling and wire drawing processes are easy to implement, reducing production and use costs, and the effect of stable quality

Active Publication Date: 2010-12-08
YICHANG MONKEY KING WELDING WIRE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the gas shielded welding wire used for welding low alloy high strength steel plates (such as Q460, Q550) in China is single, which is far from meeting the growing demand for gas shielded welding of low alloy high strength steel plates.
Domestically, ER55-D2Ti welding wire or 60kg nickel-molybdenum-containing welding wire is generally used for welding low-alloy high-strength steel plates, but its cost is high and it is not suitable for large-scale promotion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A 90-ton furnace is used to smelt welding wire steel with low S and P billets. The steel for welding wire is refined and rolled into steel wire rod for welding. After wire drawing, copper plating and winding processes, a welding wire of Ф1.2mm is produced. . The chemical composition of the welding wire is calculated by weight percentage: C 0.076, Mn 1.95, Si 0.65, Cr 0.22, Ni 0.15, S 0.009, P 0.010, and the balance is iron and unavoidable impurities. Copper is plated on the surface after being drawn to make welding wire, and the copper content of the welding wire is 0.10%.

[0032] Using the above Ф1.2mm welding wire, use CO 2 Gas protection, the mechanical properties test of the deposited metal is carried out on the Q345 steel plate. The welding specifications are: welding current 260-290A, welding voltage 27-31V, welding speed 33±1.5cm / min, gas flow 20L / s, welding line energy 17kJ / cm. The tensile strength of the deposited metal is 685MPa, the yield strength is 585...

Embodiment 2

[0036] A 90-ton furnace is used to smelt welding wire steel with low S and P billets. The steel for welding wire is refined and rolled into steel wire rod for welding. After wire drawing, copper plating and winding processes, a welding wire of Ф1.2mm is produced. . The chemical composition of the wire is by weight percentage: C 0.076, Mn 1.86, Si 0.60, Cr 0.18, Ni0.08, Ti 0.08, S 0.0043, P 0.013, and the balance is iron and unavoidable impurities. Copper is plated on the surface after being drawn to make welding wire, and the copper content of the welding wire is 0.10%.

[0037] Using the above Ф1.2mm welding wire, use CO 2Gas shielding, the mechanical properties test of the deposited metal is carried out on the Q345 steel plate. The welding specification is: welding current 260-290A, welding voltage 27-31V, welding speed 33±1.5cm / mi, gas flow rate 20L / s, welding line energy 17kJ / cm . The tensile strength of the deposited metal is 685MPa, the yield strength is 585MPa, the e...

Embodiment 3

[0041] A 90-ton furnace is used to smelt welding wire steel with low S and P billets. The steel for welding wire is refined and rolled into steel wire rod for welding. After wire drawing, copper plating and winding processes, a welding wire of Ф1.2mm is produced. . The chemical composition of the welding wire is calculated by weight percentage: C 0.083, Mn 1.72, Si 0.59, Ti0.08, S 0.010, P 0.015, Ni 0.13, Cr 0.24, and the balance is iron and unavoidable impurities. The surface of the welding wire is plated with copper after drawing, and the copper content of the welding wire is 0.12%.

[0042] Using the above Ф1.2mm welding wire, use CO 2 Gas protection, the mechanical properties test of the deposited metal is carried out on the Q345 steel plate. The welding specifications are: welding current 260-290A, welding voltage 27-31V, welding speed 33±1.5cm / min, gas flow 20L / s, welding line energy 17kJ / cm. The tensile strength of the deposited metal is 665MPa, the yield strength i...

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Abstract

The invention provides a solid welding wire for high-toughness structural steel, which comprises the following chemical components by weight percent: C: 0.06-0.12, Si: 0.4-0.8, Mn: 1.2-2.4, Ni: 0.05-0.30, Cr: 0.15-0.30, S: not more than 0.015, P: not more than 0.020 and the balance of Fe and other unavoidable impurities. As for the solid welding wire for the high-toughness structural steel provided by the invention, yield strength for deposited metal is more than 500MPa and tensile strength is more than 600MPa; after welding, welding seams have beautiful shaping, little splash and low crack sensitivity, thus meeting the welding requirement for a low-alloy high strength steel plate; and relative to an ER55-D2Ti welding wire or a 60kg of welding wire containing Ni-Mo system, the solid welding wire of the invention lowers production cost and use cost on the premise of guaranteeing intensity and impact toughness, thus being suitable for large-scale popularization and application.

Description

technical field [0001] The invention relates to a gas-shielded welding wire for welding metal materials, in particular to a solid welding wire for high-toughness structural steel used for welding low-alloy high-strength steel plates. Background technique [0002] At present, the gas shielded welding wire used for welding low-alloy high-strength steel plates (such as Q460, Q550) in China is single in variety, which is far from meeting the growing demand for gas-shielded welding of low-alloy high-strength steel plates. ER55-D2Ti welding wire or 60 kg grade welding wire containing nickel and molybdenum is generally used in China for welding low-alloy high-strength steel plates, but its cost is high and it is not suitable for large-scale promotion. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a solid core welding wire for high toughness structural steel, the yield strength of the deposited metal is greater than 50...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K9/16B23K103/04
Inventor 戴敦乐
Owner YICHANG MONKEY KING WELDING WIRE
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