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Self-shielded flux-cored welding wire with in-situ glass slag coating and preparation method thereof

A technology of in-situ generation, flux-cored welding wire, applied in welding equipment, manufacturing tools, welding media, etc., can solve problems such as no beneficial coating, environmental pollution, waste slag discharge, etc., to improve material utilization and avoid waste slag discharge. , to avoid the effect of wasting working hours

Active Publication Date: 2021-06-11
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, welding slag can also have adverse effects, such as difficult slag removal, so slag removal has become one of the key indicators of welding process performance; and the removal of slag after welding produces a large amount of material waste and waste slag discharge, polluting the environment
[0003] Up to now, humans still treat slag as a kind of waste that must be removed, and there is no report on using slag as a beneficial coating that can achieve surface modification

Method used

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  • Self-shielded flux-cored welding wire with in-situ glass slag coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A self-shielding flux-cored welding wire with a glass slag coating formed on the surface of the weld bead in situ, including a low-carbon steel strip and flux core powder, the flux core powder 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 powder is prepared according to the following quality: 80g of ferroboron, 6g of wollastonite powder, 3g of ferrosilicon, 3g of white clay powder, 1g of sodium fluoride powder, 2g of potassium titanate powder, 5g of iron powder . All powders are passed through a 200 mesh sieve. Put the various powders taken into the powder mixer, mix for 30 minutes, then add the mixed powder into the U-shaped 0.9×14mm H08A carbon steel belt groove, and the flux core powder accounts for 22% of the total weight of the welding wire. Then close the U-shaped groove so that the powder is wrapped therein. Then let it pass through the diameters of 4.2mm, 3.8...

Embodiment 2

[0034] A self-shielding flux-cored welding wire with a glass slag coating formed in situ on the surface of a weld bead comprises a low-carbon steel strip and a flux core, and the flux core is filled in the steel strip. The composition of 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: 60g of ferroboron, 12g of wollastonite powder, 7g of ferrosilicon, 5g of white clay powder, 2g of sodium fluoride powder, 3g of potassium titanate powder, 11g of iron powder . All powders are passed through a 200 mesh sieve. Put the various powders taken into the powder mixer, mix for 30 minutes, then add the mixed powder into the U-shaped 0.9×14mm H08A carbon steel belt groove, and the flux core powder accounts for 12% of the total weight of the welding wire. Then close the U-shaped groove so that the powder is wrapped therein. Then let it pass through the diameters of 4.2mm, 3.8mm, 3.5mm, 3....

Embodiment 3

[0036] A self-shielding flux-cored welding wire with a glass slag coating formed on the surface of the weld bead in situ, 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 ferroboron, 8g of wollastonite powder, 6g of ferrosilicon, 1g of white mud powder, 3g of sodium fluoride powder, 1g of potassium titanate powder, 11g of iron powder . All powders are passed through a 200 mesh sieve. Put the various powders taken into the powder mixer, mix for 30 minutes, then add the mixed powder into the U-shaped 0.8×12mm H08A carbon steel belt groove, and the flux core powder accounts for 18% of the total weight of the welding wire. Then close the U-shaped groove so that the powder is wrapped therein. Then make it pass through drawing dies with diameters of 4.2m...

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Abstract

The invention discloses a self-protecting flux-cored welding wire with a glass slag coating formed in situ and a preparation method thereof, which comprises a low-carbon steel strip and a flux-core powder, and the flux-core powder is filled in the steel strip, and the flux-core powder is manufactured according to The mass percentage includes the following components: 60-80% ferroboron, 5-12% wollastonite powder, 3-7% ferrosilicon, 1-5% white mud powder, 1-3% fluorine Sodium chloride powder, 1-3% potassium titanate powder, the balance being iron powder, the core powder accounts for 12-22% of the total weight of the welding wire. The welding wire provided by the invention not only eliminates the slag removal process, reduces waste slag discharge, improves material utilization, but also expands the slag function for the first time, and proposes the in-situ generation of slag coating technology. The in-situ generated glass slag coating has Anti-corrosion and anti-oxidation, with the function of protecting the weld.

Description

technical field [0001] The invention belongs to the field of welding in material processing engineering, and in particular relates to a self-protecting flux-cored welding wire with a glass slag coating formed in situ and a preparation method thereof. Background technique [0002] Welding slag plays an important role in welding metallurgy. It mainly plays the role of protecting liquid metal from air intrusion, metallurgical purification of weld seam, and assisting weld seam forming. However, welding slag can also have adverse effects, such as difficult slag removal, so slag removal becomes one of the key indicators of welding process performance; and the removal of slag after welding produces a large amount of material waste and waste slag discharge, polluting the environment. [0003] Up to now, humans still treat slag as a waste slag that must be removed, and there is no report on using slag as a beneficial coating that can achieve surface modification. Contents of the i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/0266B23K35/3053B23K35/406
Inventor 刘大双魏萍吴铭方钟素娟王加友张雷丁天然
Owner JIANGSU UNIV OF SCI & TECH
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