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Welding wire for gas shielded arc welding for 60 kilogram level high-tensile structural steel

A gas-shielded welding wire, high-strength technology, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of increased cost, increased welding wire cost, and easy cold cracks in the weld to achieve production cost reduction , improve strength and toughness, and prevent cold cracks

Inactive Publication Date: 2008-08-13
金秋生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Contains a high content of the precious metal nickel in this welding wire, thus greatly increasing its cost
In addition, when using this welding wire to weld low-alloy high-strength steel, due to the problem of alloy ratio, there is still a problem that the low-alloy high-strength steel to be welded must be preheated at a temperature above 150°C and the weld is still prone to cold. crack defect
In addition, boron is contained in the wire, although it improves its hardenability, it also increases the cost of the wire

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The steel with both S and P less than 0.020% by weight is selected for smelting the welding wire steel, and there is no special requirement for the smelting process. During the smelting process, the following elements by weight percentage are added: C: 0.04, Mn: 2.00, Si: 0.50, Ti: 0.10, V: 0.04, and the balance is iron and its unavoidable impurities.

Embodiment 2

[0016] The steel with both S and P less than 0.025% by weight is selected for smelting welding wire steel, and there is no special requirement for the smelting process. During the smelting process, the following elements C: 0.12, Mn: 1.90, Si: 0.60, Ti: 0.15, V: 0.03 are added in the weight percentage, and the balance is iron and its unavoidable impurities. After being drawn into welding wire, the welding wire is copper-plated, and the amount of copper plating is 0.5% of the iron content in the welding wire.

Embodiment 3

[0018] The steel with both S and P less than 0.015% by weight is selected for smelting welding wire steel, and there is no special requirement for the smelting process. During the smelting process, the following elements by weight percentage are added: C: 0.08, Mn: 1.50, Si: 0.80, Ti: 0.18, V: 0.05, and the balance is iron and its unavoidable impurities. After being drawn into welding wire, the welding wire is copper-plated, and the amount of copper plating is 0.3 percent of the iron content in the welding wire.

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PUM

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Abstract

The invention pertains to welding wire technique field, disclosing a welding wire for gas shielded arc welding used for a 60 kilogram level high-tensile structural steel. The welding wire is composed of elements according to following percentage: 0.04-0.124555344f C, 1.20-2.2021455027f Mn, 0.40-0.90551375040f Si, 0.03-0.2025023440f Ti, 0.03-0.061f V, less than of equal to 0.025 of S, less than or equal to 0.025555366310f P, and residue percent of Fe and unavoidable impurity. Microalloying of weld joint can be realized and generation of cold check phenomenon of weld joint is avoided by using the welding wire to weld high-tensile structural steel; pre-heating is not needed during welding, so that operational environment of welders is improved, welding cost is reduced; weld joint crystal grain is further refined, thereby the durability of the weld joint is increased, splash during welding is decreased, and production cost of each ton solder is reduced by more than 1500 yuan.

Description

technical field [0001] The invention belongs to the field of welding wire technology, in particular to a gas-shielded welding wire for 60-kilogram high-strength structural steel specially used for welding low-alloy high-strength steel. Background technique [0002] Low-alloy high-strength steel is a steel with excellent low-temperature impact toughness and high strength. It has the advantages of reducing material consumption, reducing structural weight, and improving structural performance and safety. Therefore, it has been used in construction machinery, railway bridges, marine facilities and high-pressure Containers and other projects are widely used. The tensile strength of this kind of steel is about 600Mpa (called 60 kg grade), yet the welding wire matching the welding strength of this kind of steel is very scarce. At present, when welding the above-mentioned low-alloy high-strength steel, either Er55 series welding wire with a strength of 550-5...

Claims

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Application Information

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IPC IPC(8): B23K35/30
Inventor 金秋生
Owner 金秋生