High-toughness and anti-hydrogen induction sulfide stress corrosion crack metal powder flux-cored wire and preparation method

A technology of stress corrosion cracking and flux-cored welding wire, applied in metal processing equipment, welding medium, manufacturing tools, etc., can solve the problems of poor welding process performance of welding wire, high content of diffusible hydrogen, and inability to weld, etc., and achieve good welding process performance , low diffusible hydrogen content, and the effect of reducing the amount of slag

Active Publication Date: 2013-05-01
ATLANTIC CHINA WELDING CONSUMABLES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing welding wire has poor welding process performance, high content of diffusible hydrogen, and slag after welding, so it cannot be welded

Method used

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  • High-toughness and anti-hydrogen induction sulfide stress corrosion crack metal powder flux-cored wire and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The steel strip (width × thickness) 14×0.9mm is used as the outer skin of the welding wire, and its chemical composition is C 0.28wt%, Mn 0.23wt%, Si 0.014wt%, S 0.005wt%, P 0.007wt%, and the balance is iron.

[0034] The weight of the flux core for producing 100Kg welding wire is 15Kg (the flux core accounts for 15wt% of the entire welding wire weight), and the components in the core are: ferrosilicon powder 0.5Kg, titanium iron powder 0.04Kg, manganese iron powder: 1.6kg, fluoride 0.02 Kg, add iron powder 12.84Kg to the total weight of the core ingredients 15Kg. Mix the ingredients of the drug core evenly before use;

[0035] Place the steel strip in the welding wire forming machine, and successively inject the to-be-used flux core mixture into the groove of the steel strip that is bent into a "U" shape in the transverse direction, and then coil it into a wire, and then it is finely drawn to Φ1.2mm. .

Embodiment 2

[0037] Except for the different content of the core components, the other conditions are the same as in Example 1.

[0038] The components in the drug core are: ferrosilicon powder 0.4Kg, ferro-titanium powder 0.1Kg, ferromanganese powder: 1.8kg, fluoride 0.2Kg, and iron powder 12.5Kg.

Embodiment 3

[0040] Except for the different content of the core components, the other conditions are the same as in Example 1.

[0041] The components in the drug core are: ferrosilicon powder 0.6 Kg, titanium iron powder 0.02Kg, manganese iron powder: 2kg, fluoride 0.08Kg, and iron powder 12.3Kg.

[0042] When the flux-cored wire of Examples 1-3 is welded, the arc is stable, there is basically no spatter, the slag removal performance is good, the all-position welding performance is excellent, the weld seam is beautifully formed, and the weld bead height is moderate.

[0043] The welding parameters of this embodiment: I=250-260A, U=28-30V, gas flow rate 20L / min, 80%Ar+surplus CO 2 .

[0044] The chemical composition of deposited metal is shown in Table 1, and the mechanical properties of deposited metal (mixed gas) are shown in Table 2. Diffusion hydrogen content: 3.0mL / 100g.

[0045] Table 1 Chemical composition of deposited metal (%)

[0046] CMn Si SP 0.041.350.690.0070.010

[0047] Table 2 Me...

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Abstract

The invention discloses a high-toughness and anti-hydrogen induction sulfide stress corrosion crack metal powder flux-cored wire which comprises outer skin and a flux core; the outer skin is a low-carbon steel thin strip; the weight of the flux core accounts for 12 percent to 20 percent of the total weight of the wire; and the diameter of the flux core is 1.20mm to 2.4mm. According to the wire welding process, the process performance and physical and chemical properties are good, the amount of slag after welding is effectively reduced, welding of a plurality of layers is carried out without clearing the slag, so that the overall performance and the welding efficiency of a welding seam are effectively improved, the performance of the welding process is good, the electric arc is stable, splashing seldom occurs, the welding seam has attractive appearance, such purposes as vertical downward welding can be achieved through short-circuit transition; and good mechanical properties and the anti-hydrogen induced crack purpose are achieved.

Description

Technical field [0001] The invention relates to a welding wire, in particular to a metal powder type flux-cored welding wire with high toughness, resistance to hydrogen induced and sulfide stress corrosion cracking and a production method thereof. Background technique [0002] Generally speaking, most oil and gas fields are distributed in vast wilderness, grassland, desert and boundless ocean, while petrochemical companies, especially the oil and gas consumption market, are located in densely populated and economically developed large and medium cities and surrounding areas. The two may be far apart Hundreds or even thousands of meters. Hydrogen-induced corrosion (HIC) and sulfide stress corrosion (SSC) in the storage and transportation of petroleum, natural gas and other resources and some chemical products have attracted more and more attention, and the requirements for corresponding materials have become higher and higher. . In the early stage of drilling and development of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/04B23K35/24B23K35/40
Inventor 郭栖利兰志刚
Owner ATLANTIC CHINA WELDING CONSUMABLES
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