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A kind of flux-cored welding wire for underwater welding and preparation method

A technology of flux-cored welding wire and underwater welding, which is applied in the direction of welding equipment, welding medium, welding/cutting medium/material, etc. It can solve the problems of weld cracks, welding spatter and slag peeling performance, etc., and achieve slag Good stripping performance, easy to promote, small splash effect

Active Publication Date: 2020-05-29
QINGDAO RUNQIAN HI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Patent 201310061500.1 proposes a self-shielding flux-cored welding wire, which improves the appearance of the weld seam and reduces the accumulation of hydrogen and oxygen in the weld seam, but currently there is no technical solution to simultaneously solve weld cracks, welding spatter and slag peeling performance

Method used

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  • A kind of flux-cored welding wire for underwater welding and preparation method
  • A kind of flux-cored welding wire for underwater welding and preparation method
  • A kind of flux-cored welding wire for underwater welding and preparation method

Examples

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Effect test

Embodiment 1

[0048]A flux-cored welding wire for underwater wet welding, the core composition of the flux-cored welding wire is as follows: 1.0% calcium oxide, 1.0% magnesium oxide, 7.5% titanium oxide, 4.0% iron oxide, silicon oxide 0.4%, calcium fluoride 0.5%, lithium fluoride 0.2%, barium fluoride 1.5%, calcium carbonate 1.8%, magnesium carbonate 0.8%, barium carbonate 0.8%, manganese 1.0%, nickel 0.7%, aluminum 0.4%, iron 4.0 %, silicon 0.4%, titanium 0.6%, magnesium 0.4%, boron 0.2%.

Embodiment 2

[0050] A flux-cored welding wire for underwater wet welding, the core composition of the flux-cored welding wire is as follows: 1.0% calcium oxide, 1.0% magnesium oxide, 7.0% titanium oxide, 5.2% iron oxide, silicon oxide 0.4%, Calcium Fluoride 1.5%, Lithium Fluoride 0.6%, Calcium Carbonate 1.8%, Magnesium Carbonate 0.8%, Manganese 1.8%, Nickel 1.2%, Aluminum 0.4%, Iron 4.0%, Silicon 0.4%, Titanium 0.6%, Magnesium 0.4%, Boron 0.2%.

Embodiment 3

[0052] A flux-cored welding wire used for underwater wet welding. The core composition of the flux-cored welding wire is as follows: 1.0% calcium oxide, 1.0% magnesium oxide, 8.0% titanium oxide, 4.2% iron oxide, silicon oxide 0.4%, calcium fluoride 0.7%, lithium fluoride 0.3%, barium fluoride 1.1%, calcium carbonate 1.8%, magnesium carbonate 0.8%, barium carbonate 0.8%, manganese 1.0%, nickel 0.8%, iron 5.0%, silicon 0.4 %, titanium 0.6%.

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Abstract

The invention discloses a flux-cored wire for underwater welding and a preparation method. The flux-cored wire is composed of outer skin and a flux core. The flux-cored wire is characterized in that the outer skin is made from low-carbon steel, the flux core is prepared from oxide, carbonate, fluoride and metal powder, the oxide is the mixture of calcium oxide, magnesium oxide, titanium oxide, iron oxide and silicon oxide, the fluoride is the mixture of calcium fluoride, lithium fluoride and barium fluoride, the carbonate is the mixture of calcium carbonate, magnesium carbonate and barium carbonate, and the metal powder is the mixture of silicon, aluminum, titanium, magnesium, nickel, iron, manganese and boron. The flux-cored wire enables underground wet welding to have the advantages thatelectric arc is stable, less splash is produced, molten slag stripping performance is excellent, welding seam forming performance is good, and welding seam structure performance is excellent.

Description

technical field [0001] The invention belongs to the field of welding wire technology, and in particular relates to a flux-cored welding wire used for underwater wet welding. Background technique [0002] Underwater welding plays an important role in the construction of marine engineering. With the development of various modern marine engineering constructions such as offshore drilling platforms, submarine oil pipelines, and cross-sea bridges in China, the demand for high-quality and high-efficiency underwater welding technology is becoming more and more urgent. [0003] Underwater welding technology can generally be divided into dry method, wet method and partial wet method. Among them, wet welding refers to the welding technology in which the welding material is directly in contact with the water, and the arc is ignited in the water and the arc is kept burning in the continuously generated air bubbles. It has become an underwater welding technology because of its low cost,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/22B23K35/30B23K35/40
CPCB23K35/0266B23K35/22B23K35/3073B23K35/406
Inventor 解宏伟盖新清
Owner QINGDAO RUNQIAN HI TECH CO LTD
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