Nickel-based welding rod and preparation method thereof

A nickel-based welding rod and welding core technology, which is applied in welding equipment, welding media, manufacturing tools, etc., can solve the problems of unfavorable development of offshore oil and gas industry, difficult quality control, long procurement cycle, etc., to increase the available length and increase the metal The effect of deposition amount and significant economic benefits

Active Publication Date: 2019-03-12
DONGGUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the welding consumables used in my country's LNG transportation and storage tank projects are mainly imported ENiCrMo-6 electrodes, which not only have a long procurement cycle, but also are expensive,

Method used

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  • Nickel-based welding rod and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] After smelting, pouring and drawing, the diameter of the welding core is Ф4mm. After mixing the powder according to the designed formula, carry out dry powder mixing and wet powder mixing, and then press the welding rod with a hydraulic press. After high-temperature drying, an electrode with a coated outer diameter of Ф6.5mm is formed.

[0036] The chemical composition of the welding core, by weight percentage: C≤0.2%, Mn2%, Si0.6-1.8%, Cr15-20%, Al≤0.2%, Ti≤0.3%, W2-6%, S≤0.005% , P≤0.006%, the balance is Ni; the composition of the drug core is calculated according to its weight percentage: marble 20-30%, fluorite 30-45%, quartz 8-12%, rutile 2-7%, titanium dioxide 1-2 %, ferro-vanadium 2-6%, ferro-manganese 2-6%, ferro-tungsten 4-7%, and iron powder as the balance.

[0037] After the welding is completed, a tensile sample of the deposited metal is prepared. The tensile strength is 750Mpa, the elongation is 34%, and the impact energy at -196°C is 88J for welding hot c...

Embodiment 2

[0040] After smelting, pouring and drawing, the diameter of the welding core is Ф4mm. After mixing the powder according to the designed formula, carry out dry powder mixing and wet powder mixing, and then press the welding rod with a hydraulic press. After high-temperature drying, an electrode with a coated outer diameter of Ф6.5mm is formed.

[0041] The chemical composition of the welding core, by weight percentage: C≤0.2%, Mn2%, Si0.6-1.3%, Cr15-18%, Al≤0.2%, Ti≤0.3%, W2-4%, S≤0.005% , P≤0.006%, the balance is Ni; the composition of the drug core is calculated according to its weight percentage: marble 20-30%, fluorite 30-45%, quartz 8-12%, rutile 3-7%, titanium dioxide 4-5% %, ferro-vanadium 2-6%, ferro-manganese 2-6%, ferro-tungsten 4-7%, and iron powder as the balance.

[0042] After the welding is completed, a tensile sample of the deposited metal is prepared. The tensile strength is 756Mpa, the elongation is 32%, and the impact energy at -196°C is 76J for welding hot ...

Embodiment 3

[0045] A preparation method of flux cored wire:

[0046] After smelting, pouring and drawing, the diameter of the welding core is Ф4mm. After mixing the powder according to the designed formula, carry out dry powder mixing and wet powder mixing, and then press the welding rod with a hydraulic press. After high-temperature drying, an electrode with a coated outer diameter of Ф6.5mm is formed.

[0047] The chemical composition of the welding core, by weight percentage: C≤0.2%, Mn5%, Si0.6-1.3%, Cr18-20%, Al≤0.2%, Ti≤0.3%, W6-8%, S≤0.005% , P≤0.006%, the balance is Ni; the composition of the drug core is calculated according to its weight percentage: marble 20-30%, fluorite 30-45%, quartz 8-12%, rutile 3-7%, titanium dioxide 4-5% %, ferro-vanadium 2-6%, ferro-manganese 2-6%, ferro-tungsten 4-7%, and iron powder as the balance.

[0048] After the welding is completed, a tensile sample of the deposited metal is prepared. The tensile strength is 774Mpa, the elongation is 37%, and ...

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Abstract

The invention provides a nickel-based welding rod. The nickel-based welding rod comprises a core wire and a flux coating, wherein the chemical components of the core wire comprise, by weight, less than or equal to 0.2% of C, 2-5% of Mn, 0.6-1.8% of Si, 10-20% of Cr, less than or equal to 0.4% of Al, less than or equal to 0.3% of Ti, 2-8% of W, less than or equal to 0.005% of S, less than or equalto 0.006% of P, and the balance N; the flux coating comprises, by weight, 20-35% of marble, 15-45% of fluorite, 8-18% of quartz, 2-8% of rutile, 1-5% of titanium dioxide powder, 2-6% of ferrovanadium,2-6% of ferromanganese, 4-7% of ferrotungsten, and the balance iron powder. The nickel-based welding rod has the technical effects of low cost, good mechanical performance of welded joints and good weld shaping.

Description

technical field [0001] The invention relates to a welding material, in particular to a nickel-based welding rod and a preparation method thereof. Background technique [0002] At present, the welding consumables used in my country's LNG transportation and storage tank projects are mainly imported ENiCrMo-6 electrodes, which not only have a long procurement cycle, but also are expensive, quality control is difficult, and there are cases of being blocked and controlled due to political and diplomatic reasons. These problems are unfavorable to the development of my country's offshore oil and gas industry. [0003] The welding rod developed by the invention, after successful mass production or industrialization, can break the predicament that my country's oil and gas storage and transportation market is monopolized by Western countries, and it is expected to reduce the purchase cost by 2 / 3, and at the same time, it can greatly reduce the cost of after-sales service. cost, improve...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/368B23K35/40
CPCB23K35/0261B23K35/304B23K35/3605B23K35/368B23K35/404
Inventor 张绍辉胡常华
Owner DONGGUAN UNIV OF TECH
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