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Sintered flux for hydrogen-resistant steel, preparation method of sintered flux, and deposited metal

A technology for sintering flux and depositing metal, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve problems such as large differences in susceptibility to hydrogen sulfide corrosion, and achieve good arc protection, good corrosion resistance, and low cracks. effect of sensitivity

Active Publication Date: 2021-03-16
SICHUAN XIYE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The types and contents of alloying elements in hydrogen-resistant steel materials are different, which makes the susceptibility of materials to hydrogen sulfide corrosion quite different.

Method used

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  • Sintered flux for hydrogen-resistant steel, preparation method of sintered flux, and deposited metal

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preparation example Construction

[0049] Second, the present invention provides a method for producing a sintered flux of hydrogen steel, including the following steps:

[0050] S1 mixes all components of the sintered flux to be uniform, then add the adhesive to stir evenly and granulate, obtain a material;

[0051] S2 uses material baking;

[0052] S3 screens the baking material to screen;

[0053] S4 will be sintered after the screening is tested by high temperature, and the fine particles were sized to give a sintered flux.

[0054] In the present invention, in S1, the adhesive is 3.1 potassium sodium glass glass.

[0055] In the present invention, in S1, the addition of the adhesive is 18 to 21% of the total weight of the flux.

[0056] In the present invention, in S2, the baked process is baked at 200 to 230 ° C for 40 min.

[0057] In the present invention, S3, the screening process is used, and a particle outside of the 8-mesh and 40 mesh screen is used.

[0058] In the present invention, the process of hig...

Embodiment 1

[0066] A sintered flux for hydrogen-hydrogen steel, and the weight ratio of each component is shown in Table 1.

[0067] The preparation method is, according to each component of the flux, each component feedstock is placed in the mixer, and the mixture is mixed and mixed and uniform, and the powder is added to the 38 ° Bé of 38 ° Bé, stirred.......... Mixed, potassium sodium water gauge is about 18% of the total powder. At the same time, the powder is mixed to form particles, granulation, and then baked for 40 min, low temperature after 200 ~ 230 ° C, after drying, using a screen to screen (8 ~ 40), 780 ~ 810 ° C high temperature Sintering 40 min, sieving again, selecting 40 mesh screening of fine powder to give a flux 1 of 2.7.

Embodiment 2

[0069] A sintered flux for hydrogen-hydrogen steel, and the weight ratio of each component is shown in Table 1.

[0070] The preparation method is that each component of the flux is proportionally referred to, and each component feedstock is placed in a mixer, and the mixture is mixed and mixed, and the powder is obtained, and the 3.1 mold potassium water glass of 41 ° Bé is added to stir. Mixed, potassium sodium water glass is added to 20% of the total weight of the powder. At the same time, the powder is mixed to form particles, granulation, and then baked for 40 min, low temperature after 200 ~ 230 ° C, after drying, using a screen to screen (8 ~ 40), 780 ~ 810 ° C high temperature Sintering 40 min, sieving again, select 40 mesh screening of fine powder to give the flux No. 2 having an alkalinity of 3.0.

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Abstract

The invention relates to the technical field of welding materials, and discloses a sintered flux for hydrogen-resistant steel, a preparation method of the sintered flux and deposited metal. The sintered flux for the hydrogen-resistant steel comprises the following components of, in percentage by weight, 25-38% of magnesite, 21-30% of white corundum, 1.5-3.0% of wollastonite, 6.0-9.8% of smelting flux slag, 33.4-40% of basic fluoride and 0.05-0.2% of rare earth. The invention further discloses the preparation method of the flux and the deposited metal. According to the flux, by controlling sources of S and P harmful elements in raw materials and the content of Mn and Ni in the deposited metal, a reasonable slag system and deposited metal chemical components are designed, the flux which is low in oxidability is developed, hydrogen-resistant steel base metal is easy to weld, arc protection is good during welding, [O], [N] and [H] in air are effectively isolated, and effective desulfurization, dehydrogenation and deoxidation are carried out through a special slag design, so that a high-quality welding seam matched with the hydrogen-resistant steel is obtained.

Description

Technical field [0001] The present invention belongs to the technical field of welding material, and in particular, a sintered flux of hydrogen steel and a preparation method thereof, and a weld metal. Background technique [0002] A large number of pressure vessels in the petrochemical industry, which generally have a problem of hydrogen sulfide corrosion. In production, the cause of hydrogen caution (HIC) and hydrogen sulfide stress corrosion cracking (SSC) were causing hydrogen and hydrogen sulfide stress etching. The Q235 / 345R (HIC) hydrogen-hydrogen is a steel commonly used in petrochemical pressure vessels. The Q235 / 345R (HIC) hydrogen steel and its supporting welding material also requires strict control of S, P content (p ≤ 0.015, s≤0.004), S, P ≤ 0.004), weld S, P ≤ 0.004) The control amount is S ≤ 0.010%, p ≤ 0.020%, and must have ultra-low diffusion hydrogen content, good hydrogen caution (HIC) and hydrogen sulfide stress corrosion cracking (SSC). This new steel (h...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K35/36B23K35/40
CPCB23K35/3073B23K35/3601B23K35/40
Inventor 韦性竹
Owner SICHUAN XIYE NEW MATERIAL