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Gas-shielded flux-cored wire with recyclable welding slag

A technology of flux-cored welding wire and gas shielding, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of resource scarcity, achieve good moisture absorption resistance, reduce welding smoke and oxygen content in welds Reduced effect

Inactive Publication Date: 2011-08-03
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to this calculation method, the reserves of (natural) rutile in my country are not enough to maintain the application of 50 years, even more scarce than resources such as oil

Method used

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  • Gas-shielded flux-cored wire with recyclable welding slag
  • Gas-shielded flux-cored wire with recyclable welding slag
  • Gas-shielded flux-cored wire with recyclable welding slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment one: the chemical composition (% by weight) of powder is: the welding slag powder (TiO 2 : 65%, MnO: 15%, MgO: 5%, SiO 2 : 5%, Fe 2 o 3 : 6%, Al 2 o 3 : 4%), 36.1% natural rutile with a purity of 97%, 7% Si, 8% Mn, 0.5% Al-Mg, 11.52% Na 2 CO 3 , 5% Mg, the rest is iron powder, and the filling rate is 12%. (wire 1)

[0045] The welding slag after this flux-cored welding wire is collected, and is processed through aforementioned processing steps, carries out the secondary utilization of welding slag powder, and used proportion is: the chemical composition (weight %) of powder is: 28% welding slag powder (TiO 2 : 52%, MnO: 12%, MgO: 8%, SiO 2 : 9%, Fe 2 o 3 : 12%, Al 2 o 3 : 7%), 30% pure 97% natural rutile, 7% Si, 6% Mn, 3% Al-Mg, 10% Na 2 CO 3 , 3% Mg, the rest is iron powder, and the filling rate is 16%. (wire 2)

[0046] The welding slag after this flux-cored welding wire is collected, and through the aforementioned processing steps, the weld...

Embodiment 2

[0047] Embodiment two: the chemical composition (weight %) of medicated powder is: the E81T-1K of 35% 2 (E551T-1K 2 ) type flux cored wire welding slag powder (TiO 2 : 35%, MnO: 5%, MgO: 15%, SiO 2 : 15%, Fe 2 o 3 : 15%, Al 2 o 3 : 15%), 15.5% (natural) rutile (97% TiO 2 ), 2% Si, 6% Mn, 5% Al-Mg, 8% 8.85% K 2 CO 3 , 1% Mg, the rest is iron powder, and the filling rate is 18%. (wire 4)

[0048] The welding slag after this flux-cored welding wire is collected, processed through the aforementioned processing steps, and the secondary utilization of the welding slag powder is carried out, and the used proportion is: 26% welding slag powder (TiO 2 : 47%, MnO: 14%, MgO: 9%, SiO 2 : 12%, Fe 2 o 3 : 8%, Al 2 o 3 : 10%), 22% rutile (97% TiO 2 ), 2% Si, 7% Mn, 4% Al-Mg, 8.85% K 2 CO 3 , 1% Mg, the rest is iron powder, and the filling rate is 17%. (wire 5)

Embodiment 3

[0050] 30% E91T-1K 2 (E551T-1K 2 ) type flux cored wire welding slag powder (TiO 2 : 55%, MnO: 10%, MgO: 12%, SiO 2 : 12%, Fe 2 o 3 : 5%, Al 2 o 3 : 6%, 20% rutile (97% TiO 2 ), 6% Si, 3% Mn, 4% Al-Mg, 7% K 2 CO 3 , 3% Mg, the rest is iron powder, and the filling rate is 14%. (wire 6)

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Abstract

A gas-shielded flux-cored wire with recyclable welding slag belongs to the welding field. In the invention, the skin of the gas-shielded flux-cored wire is made from a mild steel strip, and welding slag powder is partially or completely instead of natural rutile, thus the purposes of saving the resource and reducing the cost are achieved. The powder of the flux-cored wire comprises the following chemical components in percentage by weight: 15-35% of the welding slag powder of the flux-cored wire (including 20-65% of TiO2, 5-15% of MnO, 5-15% of MgO, 5-15% of SiO2, 1-10% of Fe2O3 and 1-10% of Al2O3), 15-35% of TiO2, 2-7% of Si, 3-8% of Mn, 0.5-5% of Al-Mg, 0-5% of Na, 0-5% of K, 1-5% of Mg and the balance of ferrous powder. When the flux-cored wire manufactured by adopting the welding slag powder is applied to welding, the gas-shielded flux-cored wire has the advantages of excellent technical performance of welding and omnibearing welding adaptability, attractive appearance good humidity resistance, low content of diffusible hydrogen in a welding seam, excellent crack resistance, high connection strength and good low-temperature impact toughness.

Description

technical field [0001] The invention belongs to the field of welding in material processing engineering, and in particular relates to a flux-cored welding wire used in gas shielded welding. Background technique [0002] Gas-shielded flux-cored wire has the advantages of welding rod and gas-shielded solid wire. It has high production efficiency and good welding process performance. It is widely used in the processing and manufacturing fields of ships, bridges, offshore platforms, and steel structures. This type of flux-cored wire mainly uses (natural) rutile to form slag, shape and stabilize the arc. The usual addition amount accounts for 20%-50% of the mineral powder, which is the main component of the cost of the flux-cored wire powder. The production of gas-shielded flux-cored wire has a great demand for rutile. At present, my country's shipbuilding industry is developing rapidly, and the consumption of flux-cored wire has increased sharply. According to the current annual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/36B23K35/40
CPCB23K35/3608B23K35/3605B23K35/362B23K35/40B23K35/3602
Inventor 栗卓新史传伟李国栋
Owner BEIJING UNIV OF TECH
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