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A kind of nickel-based welding rod and preparation method thereof

A technology of nickel-based welding rods and welding rods, applied in welding equipment, manufacturing tools, welding media, etc., can solve the problems of long procurement cycle, high price, and difficult quality control, so as to improve the quality of weld forming, improve mechanical properties, reduce Effect of crystallization crack tendency

Active Publication Date: 2022-05-27
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, quality control is difficult, and there are cases of being blocked and controlled due to political and diplomatic reasons. problems, which are not conducive to the development of my country's offshore oil and gas industry

Method used

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  • A kind of nickel-based welding rod and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The diameter of the welding core is Ф4mm obtained by melting, pouring and drawing. After mixing powder according to the designed formula, dry powder stirring and wet powder stirring are carried out, and then the welding rod is pressed by a hydraulic press. The welding rod is dried, dried at low temperature and kept at 350 °C for 2 hours After drying at high temperature, a welding rod with a coating outer diameter of Ф6.5mm is formed.

[0036] The chemical composition of the solder 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 core is based on its weight percentage: marble 20-30%, fluorite 30-45%, quartz 8-12%, rutile 2-7%, titanium dioxide 1-2 %, ferrovanadium 2-6%, ferromanganese 2-6%, ferrotungsten 4-7%, iron powder is the balance.

[0037] After the welding is completed, the deposited metal tensile specimen is prepared, the tensile strength is 750Mpa, the elonga...

Embodiment 2

[0040] The diameter of the welding core is Ф4mm obtained by melting, pouring and drawing. After mixing powder according to the designed formula, dry powder stirring and wet powder stirring are carried out, and then the welding rod is pressed by a hydraulic press. The welding rod is dried, dried at low temperature and kept at 350 °C for 2 hours After drying at high temperature, a welding rod with a coating outer diameter of Ф6.5mm is formed.

[0041] The chemical composition of the solder 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 core is based on its weight percentage: marble 20-30%, fluorite 30-45%, quartz 8-12%, rutile 3-7%, titanium dioxide 4-5 %, ferrovanadium 2-6%, ferromanganese 2-6%, ferrotungsten 4-7%, iron powder is the balance.

[0042] After the welding is completed, the deposited metal tensile specimen is prepared, the tensile strength is 756Mpa, the elonga...

Embodiment 3

[0045] A preparation method of flux-cored welding wire:

[0046] The diameter of the welding core is Ф4mm obtained by melting, pouring and drawing. After mixing powder according to the designed formula, dry powder stirring and wet powder stirring are carried out, and then the welding rod is pressed by a hydraulic press. The welding rod is dried, dried at low temperature and kept at 350 °C for 2 hours After drying at high temperature, a welding rod with a coating outer diameter of Ф6.5mm is formed.

[0047] The chemical composition of the solder 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 core is based on its weight percentage: marble 20-30%, fluorite 30-45%, quartz 8-12%, rutile 3-7%, titanium dioxide 4-5 %, ferrovanadium 2-6%, ferromanganese 2-6%, ferrotungsten 4-7%, iron powder is the balance.

[0048] After the welding is completed, the deposited metal tensile speci...

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Abstract

A nickel-based electrode, including welding core and coating, the chemical composition of the welding core, by weight percentage: C≤0.2%, Mn2‑5%, Si0.6‑1.8%, Cr10‑20%, Al≤0.4% , Ti≤0.3%, W2‑8%, S≤0.005%, P≤0.006%, the balance is Ni; the composition of the drug core is calculated according to its weight percentage: marble 20‑35%, fluorite 15‑45%, quartz 8 ‑18%, rutile 2‑8%, titanium dioxide 1‑5%, ferrovanadium 2‑6%, ferromanganese 2‑6%, ferrotungsten 4‑7%, iron powder as the balance, with low cost, welded joints Good mechanical properties and good technical effect of weld formation.

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 materials 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 and difficult to control quality. The problem is unfavorable to the development of my country's offshore oil and gas industry. [0003] After successful mass production or industrialization, the electrode developed by the invention can break the predicament of my country's oil and gas storage and transportation market being monopolized by western countries, and it is expected to reduce the procurement cost by 2 / 3, and at the same time, it can greatly reduce the after-sales service of the product. Cost, improve service efficiency, effectively reduce the problem of high construction costs of domest...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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