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Low-density surfacing flux with long-fiber wollastonite as frame and preparation method thereof

A wollastonite and long fiber technology is applied in the field of low-density surfacing flux and its preparation, which can solve the problems of affecting flux permeability and arc stability, flux particles easily collided and fragmented, and gas indentation on the surface of the weld bead, etc. Achieve the effect of avoiding gas indentation on the surface of the weld bead, good wear resistance, and delaying the rate

Active Publication Date: 2021-06-04
SICHUAN XIYE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these measures have brought about the problems that the powders of the flux raw materials are agglomerated and loose, and the bonding strength is insufficient.
Insufficient particle strength of the flux will lead to the collision and fragmentation of the flux particles during production, transportation and application, and the amount of fine powder produced will increase significantly, which will affect the permeability of the flux and the stability of the arc, and will easily produce gas indentations on the surface of the weld bead. Not suitable for stainless steel strip surfacing welding technology with high process requirements

Method used

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  • Low-density surfacing flux with long-fiber wollastonite as frame and preparation method thereof
  • Low-density surfacing flux with long-fiber wollastonite as frame and preparation method thereof

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preparation example Construction

[0035] The preparation method of the low-density surfacing welding flux with long fiber wollastonite as the frame comprises the following steps:

[0036] S1: Mix the above-mentioned raw materials uniformly in proportion, then add pure potassium water glass and stir evenly, the weight of pure potassium water glass is 20-25% of the total weight of raw materials, and the mixed raw materials are obtained;

[0037] S2: The prepared mixed raw materials are rolled and granulated by rotating the swash plate, followed by low-temperature drying at 120-160°C, sieving, and crushing of flux particles. The sieving particle size is 8-40 mesh, and then high-temperature drying at 650-720 Dry, that is, the finished flux is produced.

Embodiment 1

[0039] This embodiment provides a low-density surfacing flux with long-fiber wollastonite as the frame, including the following raw materials in mass percentages: 41% long-fiber wollastonite, 25% alumina, 13% fluorite, and 15% potassium feldspar , Cr powder 3%, Mn powder 1.5% and SiFe1.5%.

[0040] Wherein, the prepared long-fiber wollastonite is in the shape of a slender rod with a length of 500 μm and an aspect ratio ≥ 10:1.

[0041] This embodiment also provides a method for preparing low-density surfacing flux with long-fiber wollastonite as a frame, comprising the following steps:

[0042] S1: Mix the above-mentioned raw materials in proportion, then add pure potassium water glass and stir evenly, the weight of pure potassium water glass is 22% of the total weight of raw materials, and the mixed raw materials are obtained;

[0043] S2: The prepared mixed raw materials are rolled and granulated by rotating the swash plate, followed by low-temperature drying at 120°C, siev...

Embodiment 2

[0045] This embodiment provides a low-density surfacing flux with long-fiber wollastonite as the frame, including the following raw materials in mass percentages: 45% long-fiber wollastonite, 25% alumina, 13% fluorite, and 12% potassium feldspar , Cr powder 3%, Mn powder 1% and SiFe 1%.

[0046] Wherein, the prepared long-fiber wollastonite is in the shape of a slender rod with a length of 1000 μm and an aspect ratio ≥ 10:1.

[0047] This embodiment also provides a method for preparing low-density surfacing flux with long-fiber wollastonite as a frame, comprising the following steps:

[0048] S1: Mix the above-mentioned raw materials in proportion, then add pure potassium water glass and stir evenly, the weight of pure potassium water glass is 20% of the total weight of the raw materials, and the mixed raw materials are obtained;

[0049] S2: The prepared mixed raw materials are rolled and granulated by rotating the swash plate, followed by low-temperature drying at 140°C, si...

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Abstract

The invention relates to the field of surfacing flux, and provides a low-density surfacing flux with long-fiber wollastonite as the frame and a preparation method thereof, comprising the following raw materials in mass percentages: 40-45% of long-fiber wollastonite, 23% of aluminum oxide 27%, 10~14% fluorite, 12~15% potassium feldspar, 2~3% Cr powder, 1~2% Mn powder and 1~2% SiFe. Also provided is a preparation method for low-density surfacing flux with long-fiber wollastonite as the frame. The low-density surfacing flux with long-fiber wollastonite as the framework produced by the present invention has a lower original bulk density, thereby having good welding process performance; the low-density welding flux with long-fiber wollastonite as the framework provided by the present invention The preparation method of the surfacing flux can prepare a flux with suitable bonding strength and high wear resistance, which can better meet the higher technical requirements in the production, transportation and application processes.

Description

technical field [0001] The invention relates to the field of surfacing flux, in particular to a low-density surfacing flux with long-fiber wollastonite as a frame and a preparation method thereof. Background technique [0002] Stainless steel strip submerged arc surfacing is the most commonly used corrosion-resistant surfacing material technology in nuclear power, petrochemical, and chemical containers; by using stainless steel welding strips of different widths (15~120mm) and matching stainless steel strip surfacing flux, it can Obtain a smooth and large-width surfacing weld bead, and realize rapid and large-area surfacing of the stainless steel corrosion-resistant layer of the pressure vessel. Commonly used types of stainless steel welding strips and corrosion-resistant layers include 309L, 308L, 309LMo, 316L, 309LNb, 347, 2209 and other austenitic stainless steels and duplex stainless steels, and their weld composition and corrosion resistance requirements are different; ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/362B23K35/40
CPCB23K35/362B23K35/40
Inventor 范阳阳郑若锋
Owner SICHUAN XIYE NEW MATERIAL
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