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Flux cored wire for gas shielded welding of weathering steel

A technology of gas shielded welding and medication, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., which can solve the problems of poor welding process performance, no flux-cored welding wire, and unsightly weld formation, so as to suppress the shortcomings Effect

Inactive Publication Date: 2010-06-23
WUHAN TEMO WELDING CONSUMABLES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there is no flux-cored welding wire matching weathering steel Q450NQR1 in my country, but solid core welding wire TH550-NQ-II is mainly used to weld weathering steel Q450NQR1
Compared with flux-cored wire welding, welding with solid-cored wire has disadvantages such as poor welding process performance, large spatter and unsightly weld formation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A flux-cored welding wire for weather-resistant steel gas shielded welding, which is composed of a steel strip and a flux core. The steel strip is a carbon steel strip, wherein the composition of the flux core is:

[0017] TiO 2 : 34%, NaF 2 : 2.0%, SiO 2 : 5%, Mn: 11%, Ti-Fe: 5%, Si-Fe: 5%, Mg: 5%, Ni: 2%, Cr: 3.0%, Cu: 2.0%, Zr: 0.3%, iron powder : 25.7%.

Embodiment 2

[0019] A flux-cored welding wire for weather-resistant steel gas shielded welding, which is composed of a steel strip and a flux core. The steel strip is a carbon steel strip, wherein the composition of the flux core is:

[0020] TiO 2 : 38%, NaF 2 : 2.0%, SiO 2 : 3%, Mn: 12%, Ti-Fe: 3%, Si-Fe: 6%, Mg: 3%, Ni: 3%, Cr: 4.0%, Cu: 2.5%, Zr: 0.2%, iron powder : 23.3%.

Embodiment 3

[0022] A flux-cored welding wire for weather-resistant steel gas shielded welding, which is composed of a steel strip and a flux core. The steel strip is a carbon steel strip, wherein the composition of the flux core is:

[0023] TiO 2 : 36%, NaF 2 : 2.0%, SiO 2 : 4%, Mn: 11%, Ti-Fe: 4%, Si-Fe: 6%, Mg: 4%, Ni: 2.5%, Cr: 3.5%, Cu: 2.4%, Zr: 0.1%, iron powder : 24.5%.

[0024] The filling rates of the drug cores in the above-mentioned embodiments are all 14.5%-15%.

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PUM

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Abstract

The present invention relates to a flux cored wire for the gas shielded welding of weathering steel. The wire consists of a steel strip and a core. The steel strip is a carbon steel strip. The core comprises components of the following percentages by weight: 34 to 38% of TiO2, 2.0% of NaF2, 3 to 5% of SiO2, 11 to 12% of Mn, 3 to 5% of Ti-Fe, 5 to 6% of Si-Fe, 3 to 5% of Mg, 2 to 3% of Ni, 3.0 to 4.0% of Cr, 2.0 to 2.5% of Cu, 0.1 to 0.3% of Zr and the balance of ferrous powder. The flux cored wire has excellent welding technical performance, mechanical properties and anti-corrosion properties. The chemical compositions, the mechanical properties and the anti-corrosion properties of deposited metal all meet the welding requirements of weathering steel Q450NQR1. The present invention provides a flux cored wire suitable for weathering steel Q450NQR1.

Description

technical field [0001] The invention relates to a flux-cored welding wire, in particular to a flux-cored welding wire for weather-resistant steel gas shielded welding. Background technique [0002] Flux-cored welding wire is a new generation of welding material, which is produced with the development of welding technology. Flux-cored welding wire has been widely valued for its high production efficiency, good process performance, excellent welding quality, low welding cost, easy slag removal, beautiful weld shape, simple operation, and easy automation and semi-automation. [0003] The low-alloy weathering steel Q450NQR1 is widely used in the manufacture of railway freight wagons at home and abroad because of its excellent atmospheric corrosion resistance, welding process performance and relatively low cost. Compared with non-weathering steel vehicles, the factory repair period of weathering steel vehicles can be increased by three years. About 20,000 new railway freight ca...

Claims

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Application Information

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IPC IPC(8): B23K35/30
Inventor 杨恒闯马洪峰刘东
Owner WUHAN TEMO WELDING CONSUMABLES CO LTD