Low zirconium and fluoride type alkaline sintering welding agent for ship and preparation method thereof

A technology of zirconium fluorine alkali type and sintered flux, applied in welding equipment, welding medium, manufacturing tools, etc., can solve the problems of low-temperature toughness of welded joints to be improved, poor process performance, poor moisture absorption resistance, etc., and achieve slag removal Good, meet the process requirements, smooth weld bead effect

Inactive Publication Date: 2019-10-01
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main problems of domestic marine sintered flux are: poor moisture absorption resistance, poor process performance, especially in high-speed welding, low alkalinity, low melting point, low temperature toughness of welded joints needs to be improved

Method used

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  • Low zirconium and fluoride type alkaline sintering welding agent for ship and preparation method thereof
  • Low zirconium and fluoride type alkaline sintering welding agent for ship and preparation method thereof
  • Low zirconium and fluoride type alkaline sintering welding agent for ship and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] A kind of marine low zirconium fluorine alkali type sintered flux, which contains components by mass percentage: CaF 2 : 97%, ZrO 2 : 3%.

[0041] The preparation method of marine low-zirconium fluorine alkali type sintered flux of the present invention comprises the steps:

[0042] Step 1, mixing ingredients:

[0043] (1) According to the composition ratio of the marine low-zirconium fluoride alkali-type sintered flux, after weighing each raw material, put it into a mixing device, stir evenly, and obtain a dry-blended raw material;

[0044] (2) by mass ratio, water glass: dry mixing raw material=20%, water glass and dry mixing raw material are carried out wet mixing, make wet mixing material; Wherein, water glass is sodium water glass;

[0045] Step 2, granulation:

[0046] (1) The wet mixture is granulated once, and the particles with a particle size of 16 to 50 mesh are selected as semi-finished products;

[0047] (2) Crushing the particles with a particle size ...

Embodiment 2

[0053] A kind of marine low zirconium fluorine alkali type sintered flux, which contains components by mass percentage: CaF 2 : 95%, ZrO: 5%.

[0054] The preparation method of marine low-zirconium fluorine alkali type sintered flux of the present invention comprises the steps:

[0055] Step 1, mixing ingredients:

[0056] (1) According to the composition ratio of the marine low-zirconium fluoride alkali-type sintered flux, after weighing each raw material, put it into a mixing device, stir evenly, and obtain a dry-blended raw material;

[0057] (2) by mass ratio, water glass: dry mixing raw material=15%, water glass and dry mixing raw material are carried out wet mixing, make wet mixing material; Wherein, water glass is potassium water glass;

[0058] Step 2, granulation:

[0059] (1) The wet mixture is granulated once, and the particles with a particle size of 16 to 50 mesh are selected as semi-finished products;

[0060] (2) Crushing the particles with a particle size g...

Embodiment 3

[0066] A kind of marine low zirconium fluorine alkali type sintered flux, which contains components by mass percentage: CaF 2 : 94%, ZrO 2 : 6%.

[0067] The preparation method of marine low-zirconium fluorine alkali type sintered flux of the present invention comprises the steps:

[0068] Step 1, mixing ingredients:

[0069] (1) According to the composition ratio of the marine low-zirconium fluoride alkali-type sintered flux, after weighing each raw material, put it into a mixing device, stir evenly, and obtain a dry-blended raw material;

[0070] (2) by mass ratio, water glass: dry mixing raw material=20%, water glass and dry mixing raw material are carried out wet mixing, make wet mix; Wherein, water glass is sodium water glass and potassium water glass by mass ratio 1:1 mixed;

[0071] Step 2, granulation:

[0072] (1) The wet mixture is granulated once, and the particles with a particle size of 16 to 50 mesh are selected as semi-finished products;

[0073] (2) Crush...

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Abstract

The invention provides a low zirconium and fluoride type alkaline sintering welding agent for a ship and a preparation method thereof. The sintering welding agent comprises a dry mixing raw material and an adhering agent, wherein the dry mixing raw material comprises the following components in percentage by mass: 93-97% of CaF2, and 3-7% of ZrO2; and the mass of the adhering agent is 15-20% of the mass of the dry mixing raw material. The preparation method comprises the steps of preparing materials based on ratio, sequentially performing dry mixing and wet mixing to obtain a wet mixing material, pelletizing and drying, sintering under special temperature, and maintaining the temperature to obtain the low zirconium and fluoride type alkaline sintering welding agent for the ship. The low zirconium and fluoride type alkaline sintering welding agent for the ship can be greatly matched with steel of a low-carbon low-alloy ship board to obtain uniform welding seam components, high welding seam intensity and low-temperature toughness; a welding seam metal welding bead is smooth; the deslagging performance is high; defects are avoided by detecting; and the technical requirement on weldingis met.

Description

technical field [0001] The invention belongs to the technical field of welding, in particular to a marine low-zirconium fluoride-alkali sintered flux and a preparation method thereof. Background technique [0002] As a new welding method developed in the 1940s, submerged arc welding is one of the welding methods with high production efficiency today, and has been widely used in shipbuilding and other fields. Submerged arc welding materials are divided into two parts: welding wire and flux. Flux is one of the main consumable materials of submerged arc welding. Process performance and chemical metallurgical properties are important factors in determining the quality of weld metal. At present, the main problems of domestic marine sintered flux are: poor moisture absorption resistance, poor process performance, especially in high-speed welding, low alkalinity, low melting point, and low-temperature toughness of welded joints needs to be improved. Therefore, how to increase the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/362B23K35/40
CPCB23K35/362B23K35/40
Inventor 王聪杨佳坤张进高俊烽
Owner NORTHEASTERN UNIV
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