High-toughness gas-electric vertical welding flux-cored wire for corrosion-resistant cot steel and preparation method thereof

A flux-cored wire, gas-electric vertical welding technology, applied in welding equipment, welding medium, manufacturing tools, etc., can solve the problem of not finding welding materials, and achieve the effect of good welding process performance, good corrosion resistance, and accelerated construction

Active Publication Date: 2018-01-16
ATLANTIC CHINA WELDING CONSUMABLES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Wuyang Steel Works has newly developed a corrosion-resistant COT steel WNS36 steel plate for crude oil tanker oil tanks, which belongs to the steel plate used for crude oil tanker cargo tanks with a thickness of 8-100mm at the 36 kg level. It is in urgent need of matching welding materials, but so far no suitable other steel plates have been found. Welding materials

Method used

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  • High-toughness gas-electric vertical welding flux-cored wire for corrosion-resistant cot steel and preparation method thereof
  • High-toughness gas-electric vertical welding flux-cored wire for corrosion-resistant cot steel and preparation method thereof
  • High-toughness gas-electric vertical welding flux-cored wire for corrosion-resistant cot steel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056]Carbon steel strip is used as the outer skin of the welding wire, C: 0.01-0.08%; Mn: 0.1-0.4%; Si: 0.01-0.03%; S: 0.005-0.010%; P: 0.005-0.015%; the balance is iron Low-carbon steel thin strip is used as the metal sheath of the welding wire; taking the preparation and production of 100Kg welding wire as an example, the components in the flux core are: copper (Cu) powder: 0.32kg, tungsten powder: 0.06kg, antimony powder: 0.07kg, calcium fluoride : 0.58kg, sodium carbonate: 0.65kg, potassium carbonate: 0.4kg, aluminum (Al) powder: 0.08kg, electrolytic manganese: 1.3kg, ferrosilicon: 0.3kg, nickel powder: 0.55kg, iron powder: 18kg; The components in the drug core are mixed uniformly and then used;

[0057] Put the steel strip in the welding wire forming machine, inject the ready-to-use flux core mixture into the groove of the steel strip bent transversely into a "U" shape, and then roll it into wire, and then finely draw it to ￠1.6mm. .

[0058] In this embodiment, weldin...

Embodiment 2

[0065] The sheath of welding wire is identical with embodiment 1, is example with preparation and production 100Kg welding wire, each composition in the flux core is: copper (Cu) powder: 0.32kg, tungsten powder: 0.06kg, antimony powder: 0.07kg, calcium fluoride: 0.6 kg, sodium carbonate: 0.65kg, potassium carbonate: 0.4kg, aluminum (Al) powder: 0.08kg, electrolytic manganese: 1.5kg, ferrosilicon: 0.3kg, nickel powder: 0.60kg, iron powder: 19kg; 1, the chemical composition of the deposited metal of the welding wire is shown in Table 3, and the mechanical properties of the deposited metal are shown in Table 4:

[0066] Table 3 Deposit metal chemical composition (wt%)

[0067] C

mn

Si

S

P

Ni

W

Sb

Cu

0.078

1.21

0.20

0.0082

0.015

0.42

0.42

0.49

0.21

[0068] The balance is Fe and impurities

[0069] Table 4 Deposited metal mechanical properties

[0070]

[0071]

[0072] Diffusion hydrogen content: 3.9...

Embodiment 3

[0074] The outer skin of the welding wire is the same as in Example 1. Taking the preparation of 100Kg welding wire as an example, the components in the flux core are: copper (Cu) powder: 0.33kg, tungsten powder: 0.07kg, antimony powder: 0.07kg, calcium fluoride: 0.7 kg, sodium carbonate: 0.65kg, potassium carbonate: 0.4kg, aluminum (Al) powder: 0.09kg, electrolytic manganese: 1.7kg, ferrosilicon: 0.4kg, nickel powder: 0.7kg, iron powder: 19kg; Mix the ingredients in the mixture evenly before use;

[0075] The preparation method of this embodiment is the same as that of Example 1.

[0076] In this embodiment, the welding parameters are the same as those in Embodiment 1 except that the gas flow rate is 30 L / min. The chemical composition of the deposited metal of the welding wire is shown in Table 5, and the mechanical properties of the deposited metal are shown in Table 6:

[0077] Table 5 Chemical composition of deposited metal (wt%)

[0078] C

mn

Si

S

...

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Abstract

The invention discloses a high-toughness electrogas vertical welding flux-cored wire matched with corrosion-resistant COT steel and a preparation method thereof. The high-toughness electrogas vertical welding flux-cored wire comprises a low-carbon steel sheath and a flux core wrapped in the low-carbon steel sheath, wherein the flux core is prepared from the following components: 0.32-0.33 weight part of copper powder, 0.06-0.07 weight part of tungsten powder, 0.07 weight part of antimony powder, 0.58-0.6 weight part of calcium fluoride, 0.55-0.85 weight part of sodium carbonate, 0.4 weight part of potassium carbonate, 0.08 weight part of aluminum powder, 1.3-1.7 weight parts of electrolytic manganese, 0.3-0.4 weight part of silicon iron, 0.55-0.7 weight part of nickel powder and 18-19 weight parts of iron powder. Compared with the prior art, through the organic preparation of the components of the flux core and the matching of the flux core and the low-carbon steel sheath, the electrogas vertical welding flux-cored wire has good corrosion resistance, a good welding process property and good physical and chemical properties.

Description

technical field [0001] The invention relates to a welding material, in particular to a high-toughness gas-electric vertical welding flux-cored welding wire for supporting corrosion-resistant COT steel and a preparation method thereof. Background technique [0002] With the rapid growth of social economy, my country's crude oil import demand is increasing, and crude oil mainly depends on sea transportation, and 80% of imported crude oil is corrosive crude oil such as high sulfur and high acid. The internal corrosion environment of the crude oil tank of the tanker is complex and unique. In the steam space of the crude oil tank, the interior includes O 2 、H 2 O, SO 2 and H 2 Harmful gases composed of S, etc., dissolve in the condensate liquid film on the upper deck, forming a corroded primary battery, which becomes one of the most severely corroded parts of a cargo ship, dissolves in the sewage layer between the lower floor and crude oil, and forms in the Cl -, SO 4 2- Un...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/3073B23K35/40
Inventor 郭栖利蒋勇陈维富明廷泽张晓柏李欣雨
Owner ATLANTIC CHINA WELDING CONSUMABLES
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