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Welding wire powder flux core, flux cored wire, its preparation method, application, ultra-high strength steel welding process

A technology of flux-cored welding wire and welding wire, which is applied in welding equipment, manufacturing tools, welding media, etc., can solve the problems of restricting the development and application of ultra-high-strength steel and the lagging development of ultra-high-strength welding materials, and achieve good welding processability and melting Metallized mechanical properties are good, the effect of no cracks on the surface

Active Publication Date: 2022-05-24
北京智双科技发展有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At the same time, the development of corresponding ultra-high-strength welding materials is seriously lagging behind, which limits the development and application of ultra-high-strength steel.

Method used

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  • Welding wire powder flux core, flux cored wire, its preparation method, application, ultra-high strength steel welding process

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preparation example Construction

[0072] According to a third aspect of the present invention, there is provided a preparation method of the above-mentioned flux-cored welding wire, comprising the following steps:

[0073] First roll the steel strip into a U-shaped cross-section shape, then fill the welding wire powder flux prepared according to the formula into the U-shaped steel strip according to the filling rate of 12-18%, roll and reduce the diameter to a diameter of 1.0-1.6 mm wire.

[0074] Specifically, the welding wire is realized in the following ways:

[0075] Select 12 × 0.8 (width of 12mm, thickness of 0.8mm) SPCC steel strip. Roll it into a U shape first. According to the design of the flux core ratio, the powder is prepared and fully mixed, and the powder is rolled and reduced into a welding wire with a diameter of 1.2mm.

[0076] According to a fourth aspect of the present invention, an application of the above-mentioned flux-cored welding wire in the field of manufacturing pressure vessels ...

Embodiment 1

[0095] A 1500MPa grade ultra-high-strength steel welding flux-cored welding wire, including SPCC hollow welding wire and powder flux core. Iron 6%, titanium iron 5%, nickel powder 10%, bismuth oxide 0.6%, rutile 28%, sodium fluoride 5%, aluminum iron 2.8%, manganese carbonate 0.6%, potassium feldspar 0.4%, iron powder balance, The fill rate is 12.5%.

[0096] The welding process is: voltage 25V; current 230A; wire feeding speed: 410 / min; gas flow rate: 15L / min; distance of welding wire extending from contact tip: 19mm. The above-mentioned process has good welding processability, small spatter, beautiful welding seam shape, and no cracks on the surface. The mechanical properties of the deposited metal are shown in Table 1.

Embodiment 2

[0098] A 1400-1600MPa grade ultra-high-strength steel welding flux-cored welding wire, including SPCC hollow welding wire and powder flux core, the powder flux core ratio is: high carbon ferrochromium 12%, electrolytic manganese 7%, molybdenum ferrous 6% , ferrovanadium 7%, ferrotitanium 2%, nickel powder 15%, rutile 25%, sodium fluoride 3.8%, aluminum ferrous 4%, bismuth oxide 0.5%, manganese carbonate 0.7%, potassium feldspar 1.4%, iron powder remaining The filling rate is 16.5%.

[0099] The welding process is: voltage 26V; current 240A; wire feeding speed: 510 / min; gas flow rate: 25L / min; distance of welding wire extending from contact tip: 25mm. The above-mentioned process has good welding processability, small spatter, beautiful welding seam shape, and no cracks on the surface. The mechanical properties of the deposited metal are shown in Table 1.

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Abstract

The invention provides a welding wire powder flux core, a flux-cored welding wire, its preparation method, application, and an ultra-high-strength steel welding process, and relates to the technical field of welding materials. The welding wire powder flux core includes the following components in weight percentage: Subdivision: high carbon ferrochrome 7‑12%; electrolytic manganese 5‑15%; ferromolybdenum 5‑10%; ferrovanadium 3‑10%; ferrotitanium 1‑5%; %; sodium fluoride 2‑5%; aluminum iron 1‑5%; bismuth oxide 0.3‑0.8%; manganese carbonate 0.4‑1.0%; potassium feldspar 0.4‑2.0%; iron powder balance. The flux-cored material and flux-cored welding wire of the present invention can meet the welding requirements of ultra-high-strength steel with a tensile strength of 1400-1600MPa, and have good welding manufacturability, small spatter, beautiful weld shape, no cracks on the surface, and the formed deposited metal is mechanically Good performance.

Description

technical field [0001] The invention relates to the technical field of welding materials, in particular to a welding wire powder flux core, a flux-cored welding wire, a preparation method and application thereof, and an ultra-high-strength steel welding process. Background technique [0002] In addition to high tensile strength, high-strength steel also requires certain plasticity and toughness, as small a notch sensitivity as possible, high fatigue strength, certain corrosion resistance, good process performance and low price. Ultra-high-strength steel has now developed into an important type of steel with a wide range of applications. It is widely used in fields with special requirements for strength, and its use range is constantly expanding to construction, machinery manufacturing, vehicles and other industrial equipment. . [0003] At the same time, the development of the corresponding ultra-high-strength welding materials is seriously lagging behind, which limits the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/12B23K35/40B23K9/16
CPCB23K35/3066B23K35/0266B23K35/406B23K9/16
Inventor 杨佰超娄宇航陈夷邹付兵
Owner 北京智双科技发展有限公司
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