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A kind of seamless flux core powder, submerged arc welding wire for lpg ship welding and its 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 and achieve strong moisture absorption resistance, good weld shape, and low temperature toughness stable effect

Active Publication Date: 2020-12-18
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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  • A kind of seamless flux core powder, submerged arc welding wire for lpg ship welding and its preparation and application
  • A kind of seamless flux core powder, submerged arc welding wire for lpg ship welding and its preparation and application
  • A kind of seamless flux core powder, submerged arc welding wire for lpg ship welding and its preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0056]

[0057]

[0058]A preparation method of submerged arc welding wire includes the following steps:

[0059] (1) Distribute each group of seamless core powder for LPG ship welding and mix them evenly to obtain seamless core powder for LPG ship welding;

[0060](2) The seamless flux core powder for LPG ship welding obtained in step (1) is wrapped with the outer skin low carbon steel strip and rolled (including steel strip welding) and reduced to obtain submerged arc welding wire. Among them, LPG ship The quality of seamless flux core powder for welding is 12% of the total mass of submerged arc welding wire.

[0061](3) The submerged arc welding wire produced in step (2) is further wound, packaged, and stored.

Embodiment 2

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

[0064]

[0065]A preparation method of submerged arc welding wire includes the following steps:

[0066](1) Distribute each group of seamless core powder for LPG ship welding and mix them evenly to obtain seamless core powder for LPG ship welding;

[0067](2) The seamless flux core powder for LPG ship welding obtained in step (1) is wrapped with the outer skin low carbon steel strip and rolled (including steel strip welding) and reduced to obtain submerged arc welding wire. Among them, LPG ship The quality of seamless flux core powder for welding is 15% of the total mass of submerged arc welding wire.

[0068](3) The submerged arc welding wire produced in step (2) is further wound, packaged, and stored.

Embodiment 3

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

[0071]

[0072]

[0073]A preparation method of submerged arc welding wire includes the following steps:

[0074](1) Distribute each group of seamless core powder for LPG ship welding and mix them evenly to obtain seamless core powder for LPG ship welding;

[0075](2) The seamless flux core powder for LPG ship welding obtained in step (1) is wrapped with the outer skin low carbon steel strip and rolled (including steel strip welding) and reduced to obtain submerged arc welding wire. Among them, LPG ship The quality of seamless flux core powder for welding is 9% of the total mass of submerged arc welding wire.

[0076](3) The submerged arc welding wire produced in step (2) is further wound, packaged, and stored.

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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 specifically relates to a seamless flux core powder for LPG ship welding, a submerged arc welding wire, and preparation and application thereof.Background technique[0002]With the rapid development of my country's economy, LPG (liquefied petroleum gas) development has become a hot spot in my country's energy development. And with the shortage of petroleum resources in my country and the increase in national environmental protection efforts, LPG as a kind of clean energy has been paid more and more attention. In recent years, LPG projects have flourished, and LPG ship construction projects have gradually increased. The demand for welding consumables for the construction of LPG ships has also gradually increased, especially submerged arc welding consumables, which are currently mainly imported from South Korea, Japan and other countries. The procurement cost is high and the procurement cycle is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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