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Low dust high crack-resistance flux-cored wire all position flux-cored wire and preparation thereof

A technology of flux-cored welding wire and high crack resistance, applied in welding equipment, welding medium, manufacturing tools, etc., can solve problems that affect the reliability of welding structures, large smoke/dust generation, cold welds, hot cracks, etc. Achieve the effect of stable welding arc, reducing welding fume and beautiful welding seam

Inactive Publication Date: 2008-08-13
TIANJIN SAINTEAGLE WELDING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional titanium welding wire generates a lot of smoke / dust during high-current welding, which is harmful to the health of workers
In addition, the amount of hydrogen diffused in the weld metal is high, the yield ratio is high, and the content of S and P is high, which will easily cause cold and hot cracks in the weld and affect the reliability of the welded structure. It is very necessary for all-position flux-cored welding wire with low smoke and dust and high crack resistance to be harmful to the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Flux-cored welding wire is manufactured by using a steel strip with a chemical composition of 0.02%C, 0.2%Mn, 0.01%Si, 0.007%S, and 0.015%P. The steps on both sides of the steel strip are 0.5mm high and 0.4mm wide. The filling rate is 10% to 15%, the diameter of the welding wire is Ф1.2mm, and the chemical composition of the powder is 32% TiO 2 , 10% SiO 2 , 5% ZrO 2 , 1% Na 2 SiF 6 , 1% rare earth fluoride, 2% Si, 12% Mn, 3% Al, 5% Mg, 0.6% Ti, 0.2% B 2 o 3 , 0.4% Re, 0.2% Na 2 O, 0.2%K 2 O, the rest is iron powder. The wire lubricant is: 45% unsaturated fatty acid, 15% talc, 40% MoS 2 .

[0021] Technical effect: When welding with this welding wire, the arc is stable, the spatter is small, the smoke is small, and the welding performance is good in all positions. .

Embodiment 2

[0022] Embodiment 2: Using SPCC-SD steel strip (its chemical composition is 0.028%C, 0.3%Mn, 0.026%Si, 0.013%S, 0.013%P, 49ppmO, 36ppmN) to manufacture flux-cored welding wire, the steps on both sides of the steel strip are high 0.5mm, width 0.4mm, filling rate of powder is 10%~13%, wire diameter is 1.0mm, chemical composition of powder is 40% TiO 2 , 5% SiO 2 , 2% ZrO 2 , 2% Na 2 SiF 6 , 1% rare earth fluoride, 1% Si, 20% Mn, 1% Al, 4% Mg, 0.6% Ti, 0.2% B 2 o 3 , 0.4% Re, 0.2% Na 2 O, 0.2%K 2 O, the rest is iron powder, of which SiO 2 , ZrO 2 , Na 2 SiF 6 , B 2 o 3 , Na 2 O, K 2 Minerals such as O are added after high temperature treatment at 960°C. The wire lubricant is: 40% unsaturated fatty acid, 15% talc, 45% WS 2 .

[0023] Technical effect: When welding with this welding wire, the arc is stable, the spatter is small, the weldability in all positions is good, the shape is beautiful, [H]=2.0ml / 100g (mercury method), and the impact absorption energy of the...

Embodiment 3

[0024] Embodiment 3: adopt SPCC-SD steel strip (its chemical composition is 0.01%C, 0.1%Mn, 0.012%Si, 0.005%S, 0.009%P) to manufacture flux-cored welding wire, the steps on both sides of the steel strip are 0.5mm high and wide 0.4mm, the filling rate of the powder is 15% to 18%, the diameter of the welding wire is 1.6mm, and the chemical composition of the powder is 44% TiO 2 , 10% SiO 2 , 3% ZrO 2 , 4% Na 2 SiF 6 , 0.5% rare earth fluoride, 4% Si, 9% Mn, 3% Al, 8% Mg, 1.2% Ti, 0.3% B 2 o 3 , 0.5% Re, 0.5% Na 2 O, 0.3%K 2 O, the rest is iron powder. The wire lubricant is: 30% unsaturated fatty acid, 25% talc, 35% MoS 2 , 10% titanium dioxide.

[0025] Technical effect: When welding with this welding wire, the arc is stable, the spatter is small, the smoke is small, and the welding performance is good in all positions, [H]=2.5ml / 100g (mercury method), the impact absorption energy of the deposited metal is 90J at -20℃ .

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Abstract

A low-dust crack-resistant full-position flux-cored wire is characterized in that the medicinal powder used by the flux-cored wire is composed of chemical components according to following percentage by weight: 25% of TiO2, 2% of SiO2, 1% of ZrO2, 1% of fluoride, 0.5% of Si, 8% of Mn, 1% of Al, 3% of Mg, 0.3% of Ti, 0.1% of boride, 0.1% of Re, 0.1% of Na2O, 0.1% of K2O, residue percent is iron powder; the preparing method comprises following steps: steel band longitudinal shearing, edge preprocessing, rolling, wire drawing, and winding. The advantages of the invention are: the weld dust is reduced, and the crack resistant property of welding joint is increased; the welding wire is provided with stable welding arc, little splash, good all position welding performance, good-looking weld joint, excellent detachability and good mechanical performance.

Description

(1) Technical field: [0001] The invention relates to a flux-cored welding wire and a preparation method thereof, in particular to an all-position flux-cored welding wire with low smoke and dust and high crack resistance and a preparation method thereof. (two) background technology: [0002] At present, flux cored wire has a series of advantages such as high efficiency and energy saving, and has been widely used in shipbuilding, steel structure, petrochemical and other fields. However, the traditional titanium-type welding wire generates a lot of smoke / dust during high-current welding, which endangers the health of workers. In addition, the amount of hydrogen diffused in the weld metal is high, the yield ratio is high, and the content of S and P is high, which will easily cause cold and hot cracks in the weld and affect the reliability of the welded structure. Low smoke and high crack resistance all-position flux-cored wires that are harmful to the environment are very neces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/368B23K35/40
Inventor 张智陈邦固
Owner TIANJIN SAINTEAGLE WELDING CO LTD
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