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Self-protection flux-cored wire capable of generating slag coating with special protection performance and preparing method

A technology of flux-cored welding wire and protective performance, applied in welding equipment, welding medium, manufacturing tools, etc., can solve the problem of one-time preparation and molding of metal structural parts without double-layer function, no slag beneficial coating, unfavorable fast operation, etc. problems, to achieve the effect of improving labor intensity, eliminating slag removal process, and improving material utilization

Inactive Publication Date: 2020-03-27
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] On the one hand, slag removal after welding is a necessary welding process; on the other hand, in order to make the weld after welding meet special performance requirements such as weather resistance and corrosion resistance, secondary coating treatment is required, which greatly wastes man-hours and increases energy consumption, waste of resources
For example, when welding repairs to ships or other water body structures, using traditional welding materials not only requires a post-weld slag removal procedure, but also requires coating of seawater corrosion-resistant coatings on the welds after welding, which is very unfavorable for rapid on-site operations
[0004] Up to now, humans still treat slag as a waste slag that must be removed. There is no report on using slag as a beneficial coating that can achieve surface modification, and there is no use of welding technology for double-layer functional metal structural parts. Related reports on one-time preparation and molding

Method used

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  • Self-protection flux-cored wire capable of generating slag coating with special protection performance and preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035]A self-shielding flux-cored welding wire that generates a slag coating with special protective properties, including a low-carbon steel strip and a flux core, the flux core is filled in the steel strip, and the composition of the flux core is prepared according to the following quality: The core and the drug core are filled in the steel strip. The H08A composition of the steel strip is C 0.1%, Mn 0.3-0.55%, Si 0.3%, S≤0.03%, P≤0.03%. The drug core components are prepared according to the following quality: 60g of glass powder, 8g of zirconia powder, 0.05g of graphene powder, 6g of sodium potassium carbonate powder, 3g of potassium titanate powder, 5g of rutile powder, and 1g of corundum powder , 1g of sodium fluorosilicate powder, 15.95g of iron powder, the core powder accounts for 13% of the total weight of the welding wire. All powders were sieved through a 150-mesh sieve. Put the various powders taken into the powder mixer, mix for 30 minutes, and then add the mixed ...

Embodiment 2

[0037] A self-shielding flux-cored welding wire that generates a special protective slag coating, including a low-carbon steel strip and a flux core, the flux core is filled in the steel strip, and the composition of the steel strip H08A is C: 0.1%, Mn: 0.3-0.55% , Si: 0.3%, S: ≤0.03%, P: ≤0.03%. The drug core components are prepared according to the following quality: 70g of glass powder, 2g of zirconia powder, 0.25g of graphene powder, 8g of sodium potassium carbonate powder, 2g of potassium titanate powder, 3g of rutile powder, and 5g of corundum powder , 2g of sodium fluorosilicate powder, 7.75g of iron powder, the core powder accounts for 25% of the total weight of the welding wire. All powders were sieved through a 150-mesh sieve. Put the various powders taken into the powder mixer, mix for 30 minutes, and then add the mixed powder into the U-shaped 0.9×14mm H08A carbon steel belt groove. Then close the U-shaped groove so that the powder is wrapped therein. Then make ...

Embodiment 3

[0039] A self-shielding flux-cored welding wire that generates a special protective slag coating, including a low-carbon steel strip and a flux core, the flux core is filled in the steel strip, and the composition of the steel strip H08A is C: 0.1%, Mn: 0.3-0.55% , Si: 0.3%, S: ≤0.03%, P: ≤0.03%. The drug core components are prepared according to the following quality: 80g of glass powder, 3g of zirconia powder, 0.85g of graphene powder, 2g of sodium potassium carbonate powder, 1g of potassium titanate powder, 2g of rutile powder, and 3g of corundum powder , 3g of sodium fluorosilicate powder and 5.15g of iron powder, the core powder accounts for 18% of the total weight of the welding wire. All powders were sieved through a 150-mesh sieve. Put the various powders taken into the powder mixer, mix for 30 minutes, and then add the mixed powder into the U-shaped 0.8×12mm H08A carbon steel belt groove. Then close the U-shaped groove so that the powder is wrapped therein. Then le...

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Abstract

The invention discloses a self-protection flux-cored wire capable of generating slag coating with special protection performance and a preparing method. The self-protection flux-cored wire comprises alow-carbon steel belt and core powder. The low-carbon steel belt is filled with the core powder. The core powder comprises, by mass, 60-80% of glass powder, 2-8% of zirconium oxide powder, 0.05-0.85%of graphene powder, 2-8% of sodium potassium carbonate powder, 1-3% of potassium titanate powder, 2-5% of rutile powder, 1-5% of corundum powder, 1-3% of sodium fluosilicate powder and the balance iron powder, wherein the core powder accounts for 13-25% of the total weight of the flux-cored wire. The self-protection flux-cored wire has the advantages of omitting the slag removal process, reducingslag discharge, and increasing the material utilization rate, and the slag coating has special protection functions of preventing seawater corrosion and the like. The traditional pursuit of improvement of slag detachability is changed, the strong 'bonded slag' welding wire is developed for the first time, the slag is turned into the protection coating, slag is turned into coating, the slag function is expanded, and the base body / coating integral forming preparation technology is developed.

Description

technical field [0001] The invention belongs to the field of welding in material processing engineering, and in particular relates to a self-shielding flux-cored welding wire for forming a slag coating with special protective performance and a preparation method thereof. Background technique [0002] Since the birth of welding technology, although welding slag has played an important role in the welding metallurgical process, it has been treated as an inevitable by-product. It needs to be cleaned after welding, which consumes a lot of man-hours, and the discharge of waste slag is also harmful to the environment. cause serious pollution. When developing self-shielding flux-cored welding wire, slag removal is one of the key process performance indicators, and the sticky slag is often difficult to remove, which restricts the welding process performance. [0003] On the one hand, slag removal after welding is a necessary welding process; on the other hand, in order to make the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/368B23K35/40
CPCB23K35/3601B23K35/368B23K35/406B23K35/0266B23K35/3602B23K35/3608B23K35/362B23K35/361B23K35/3607B23K2103/52B23K2103/54
Inventor 刘大双魏萍龙伟民吴铭方王加友钟素娟
Owner JIANGSU UNIV OF SCI & TECH
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