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All-position flux-cored wire for alkaline gas protection

A technology of flux-cored welding wire and alkaline gas, which is applied in the direction of welding medium, welding equipment, welding equipment, etc., can solve the problems of low-temperature impact toughness decline, etc., and achieve the improvement of welding performance, the reduction of deposited metal impurities, and the reduction of welding spatter Effect

Inactive Publication Date: 2012-11-21
天津雷公焊接材料有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the rutile slag-based welding wire has its weakness, because the rutile slag-based TiO2 transitions to Ti in the deposited metal, resulting in a decrease in low-temperature impact toughness
In addition, when welding large rigid components, rutile welding wire is more prone to cold and hot cracks than alkaline slag welding wire

Method used

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  • All-position flux-cored wire for alkaline gas protection
  • All-position flux-cored wire for alkaline gas protection

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Embodiment Construction

[0006] The invention is an alkaline slag-based flux-cored welding wire. The outer surface of the welding wire is wrapped with SPCC or a low-carbon steel strip with similar performance, and the cross-sectional shape is O-shaped butt joint or lap joint. The steel strip is rolled into a semicircle, and then a powder mixture with a specific ratio is added, then sealed and then reduced to 1.2mm by drawing. The drug core includes slagging agent, arc stabilizing agent, deoxidizer, and a certain amount of alloying agent and iron powder are also added. The above flux cores are mixed evenly in a certain proportion and then added to the welding wire. Several typical formulas are listed below, and the corresponding filling rate is 20%.

[0007]

[0008] Tests show that F1 and F2 have better all-position welding performance, while F3 and F4 cannot perform all-position welding. The mechanical properties of F1 and F2 are as follows;

[0009]

[0010] Professionals can make many chang...

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PUM

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Abstract

The invention discloses an all-position flux-cored wire for alkaline gas protection, which has both strong impact toughness and strong crack resistance and is suitable for protection of gas such as CO2 or CO2+Ar. The flux-cored wire is manufactured by drawing SPCC (steel plate cold commercial) steel strips or similar mild-carbon steel strips wrapping flux core in specific component proportion. By adopting an alkaline slag system, weld metal can be purified, hydrogen and oxygen contents of the weld metal can be reduced, so that excellent impact toughness and cracking resistance can be obtained. Desulphuration capacity of the alkaline slag system is utilized so as to further purify the weld metal and improve the cracking resistance.

Description

technical field [0001] The invention relates to an alkaline slag-based flux-cored welding wire, in particular to an all-position alkaline gas-protected flux-cored welding wire. Background technique [0002] As we all know, in the flux-cored wire, the wire that can be welded in all positions is made of rutile slag, which is the opposite of the electrode. Among the flux-cored welding wires, the rutile slag series has the characteristics of short slag and excellent all-position welding performance. And the shape is beautiful, the slag is easy to remove, and the splash is small. Although the basic slag-based flux-cored wire has excellent mechanical properties, the slag is long and difficult to operate in all positions. Therefore, people tend to use rutile slag system to improve the mechanical properties on the basis of it. However, the rutile slag-based welding wire has its weakness. Because the rutile slag-based TiO2 transitions to Ti in the deposited metal, the low-temperat...

Claims

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Application Information

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IPC IPC(8): B23K35/368B23K9/16
Inventor 雷万钧陈泽荣
Owner 天津雷公焊接材料有限公司
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