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Seamless flux-cored powder and submerged arc welding wire for LPG ship welding and preparation and application

A technology of submerged arc welding wire and flux core powder, which is applied in the direction of welding equipment, welding medium, welding/cutting medium/material, etc., which can solve the problems of late start, achieve strong moisture absorption resistance, good fusion, and reduce the content of diffusible hydrogen Effect

Active Publication Date: 2018-11-13
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the welding materials used in LPG ship construction, domestic related research started relatively late, and some experience has been accumulated, but it still needs to be further improved and improved.

Method used

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  • Seamless flux-cored powder and submerged arc welding wire for LPG ship welding and preparation and application
  • Seamless flux-cored powder and submerged arc welding wire for LPG ship welding and preparation and application
  • Seamless flux-cored powder and submerged arc welding wire for LPG ship welding and preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A seamless core powder for LPG ship welding, comprising the following components by mass percentage:

[0056]

[0057]

[0058] A preparation method for submerged arc welding wire, comprising the steps of:

[0059] (1) Distributing and mixing the components of the seamless core powder for LPG ship welding to obtain the seamless core powder for LPG ship welding;

[0060] (2) The seamless flux core powder for LPG ship welding obtained in the step (1) of wrapping the low-carbon steel strip on the outer skin is rolled (including steel strip mouth welding) and reduced in diameter to obtain a submerged arc welding wire, wherein the LPG ship The mass of the seamless flux core powder for welding is 12% of the total mass of the submerged arc welding wire.

[0061] (3) The submerged arc welding wire prepared in step (2) is further coiled, packaged, and put into storage.

Embodiment 2

[0063] A seamless core powder for LPG ship welding, comprising the following components by mass percentage:

[0064]

[0065] A preparation method for submerged arc welding wire, comprising the steps of:

[0066] (1) Distributing and mixing the components of the seamless core powder for LPG ship welding to obtain the seamless core powder for LPG ship welding;

[0067] (2) The seamless flux core powder for LPG ship welding obtained in the step (1) of wrapping the low-carbon steel strip on the outer skin is rolled (including steel strip mouth welding) and reduced in diameter to obtain a submerged arc welding wire, wherein the LPG ship The mass of the seamless flux core powder for welding is 15% of the total mass of the submerged arc welding wire.

[0068] (3) The submerged arc welding wire prepared in step (2) is further coiled, packaged, and put into storage.

Embodiment 3

[0070] A seamless core powder for LPG ship welding, comprising the following components by mass percentage:

[0071]

[0072]

[0073] A preparation method for submerged arc welding wire, comprising the steps of:

[0074] (1) Distributing and mixing the components of the seamless core powder for LPG ship welding to obtain the seamless core powder for LPG ship welding;

[0075] (2) The seamless flux core powder for LPG ship welding obtained in the step (1) of wrapping the low-carbon steel strip on the outer skin is rolled (including steel strip mouth welding) and reduced in diameter to obtain a submerged arc welding wire, wherein the LPG ship The mass of the seamless flux core powder for welding is 9% of the total mass of the submerged arc welding wire.

[0076] (3) The submerged arc welding wire prepared in step (2) is further coiled, packaged, and put into storage.

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Abstract

The invention belongs to the technical field of welding materials, and particularly relates to a seamless flux-cored powder and submerged arc welding wire for LPG ship welding and preparation and application. The seamless flux-cored powder for LPG ship welding comprises the following compositions of, by mass, 1.2-4.5% of metallic nickel, 0.3-1.8% of ferromolybdenum, 14-20 % of metallic manganese,1-3% of rare earth ferrosilicon, 0.5-2% of titanium iron, 0.2-0.6% of boron iron, 0.2-0.6% of zirconium iron and the balance metallic iron. The invention further provides the submerged arc welding wire comprising the flux-cored powder. The welding wire is matched and combined with F7A(P)8 flux conforming to ASME II SFA-5.17, the characteristics of good moisture absorption resistance, stable electric arc and beautiful welding line formation are achieved, the technology capability is good, low temperature toughness of welding line metal is good, the anti-crack sensitivity is good, high heat input welding for LPG ship construction is suitable, and great market promotion prospects and good economic benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a seamless core powder for LPG ship welding, a submerged arc welding wire and its preparation and application. Background technique [0002] With the rapid development of our country's economy, the development of LPG (liquefied petroleum gas) has become a hot spot in our country's energy development. And with the shortage of oil resources in our country and the strengthening of national environmental protection, liquefied petroleum gas has been paid more and more attention as a clean energy source. In recent years, liquefied petroleum gas projects have flourished, and LPG ship construction projects have gradually increased. The demand for welding consumables matching the welding and forming of LPG ship construction is also gradually increasing, especially submerged arc welding consumables, which are mainly imported from South Korea, Japan and other countries...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/3086B23K35/40
Inventor 宋聚海朱官朋
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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