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Sintered flux for welding hsla steel and preparation method thereof

A sintered flux and post-welding technology, applied in welding equipment, welding equipment, welding media, etc., can solve the problems of weld metal performance degradation, etc., and achieve high tensile strength, optimized formability, and optimized physical and chemical properties.

Active Publication Date: 2022-02-22
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It solves the problems of weld metal performance degradation and defects caused by excessive oxygen content in the prior art

Method used

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  • Sintered flux for welding hsla steel and preparation method thereof
  • Sintered flux for welding hsla steel and preparation method thereof
  • Sintered flux for welding hsla steel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] The sintering flux for welding HSLA steel provided by the present embodiment comprises the following components in terms of mass percentage: CaF 2 53%, ZrO 2 30%, SiO 2 15% and Na 2 O 2%.

[0065] The preparation method of the sintered flux for welding HSLA steel provided by the present embodiment comprises the following steps:

[0066] (1), 530gCaF 2 , 300gZrO 2 and 110gSiO 2 Putting into a V-shaped mixer with a frequency of 0.5Hz and stirring evenly, then adding 170g of water glass (the modulus is 2.8, and the water content of the water glass is 50%) to it, after mixing and stirring for 50min, a mixed material is obtained; The mixed material is placed in an XH433 PS granulator for granulation to obtain mixed granules with a particle size of 20-50 mesh;

[0067] (2) Place the mixed particles with a particle size of 20~50 mesh in a tube furnace and dry at 350°C for 2 hours, then place the dried mixed particles in a muffle furnace and sinter at 460°C for 3 hour...

Embodiment 2

[0071] The sintering flux for welding HSLA steel provided by the present embodiment comprises the following components in terms of mass percentage: CaF 2 54%, ZrO 2 30%, SiO 2 13% and Na 2 O 3%.

[0072] The preparation method of the sintered flux for welding HSLA steel provided by the present embodiment comprises the following steps:

[0073] (1), 540gCaF 2 , 300gZrO 2 and 80gSiO 2 Putting into a V-shaped mixer with a frequency of 0.5 Hz and stirring evenly, then adding 255g water glass (the modulus is 2.8, and the water content of the water glass is 50%) to it, after mixing and stirring for 55min, a mixed material is obtained; The mixed material is placed in an XH433 PS granulator for granulation to obtain mixed granules with a particle size of 20-50 mesh;

[0074] (2) Place the mixed particles with a particle size of 20-50 mesh in a tube furnace and dry at 350°C for 2 hours, then place the dried mixed particles in a muffle furnace and sinter at 490°C for 3 hours ...

Embodiment 3

[0078] The sintering flux for welding HSLA steel provided by the present embodiment comprises the following components in terms of mass percentage: CaF 2 59%, ZrO 2 25%, SiO 2 13% and Na 2 O 3%.

[0079] The preparation method of the sintered flux for welding HSLA steel provided by the present embodiment comprises the following steps:

[0080] (1), 590gCaF 2 , 250gZrO 2 and 80gSiO 2 Putting into a V-shaped mixer with a frequency of 0.5 Hz and stirring evenly, then adding 255g water glass (the modulus is 2.8, and the water content of the water glass is 50%) to it, and after mixing and stirring for 60min, a mixed material is obtained; The mixed material is placed in an XH433 PS granulator for granulation to obtain mixed granules with a particle size of 20-50 mesh;

[0081] (2) Place the mixed particles with a particle size of 20~50 mesh in a tube furnace and dry at 300°C for 2.5 hours, then place the dried mixed particles in a muffle furnace and sinter at 500°C 3h, to...

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Abstract

The invention relates to the field of welding technology, in particular to a sintered flux for welding HSLA steel and a preparation method thereof. The sintering flux for welding HSLA steel includes the following components in terms of mass percentage: CaF 2 50%~60%, ZrO 2 25%~35%, SiO 2 13%~17% and Na 2 O 2%~5%; the welding method is submerged arc welding. The sintered flux has good surface morphology, low temperature toughness and slag removal performance in the welding process, uniform weld composition and structure, high tensile strength of weld metal, no defects, strong stability during welding, and high safety performance .

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a sintered flux for welding HSLA steel and a preparation method thereof. Background technique [0002] Submerged arc welding flux plays an important role in submerged arc welding. It is one of the main consumable materials in the process of high energy input welding. It not only protects the weld metal from oxidation, but also transitions to the weld through alloy transition. Beneficial metal elements to improve the mechanical properties of the weld metal (such as tensile strength, low temperature impact toughness, etc.). [0003] There are many types of flux, mainly including bonding flux, melting flux and sintering flux. Among them, sintered flux is a high-quality, high-efficiency, energy-saving and environmentally friendly flux. Sintered flux is smokeless, odorless, arc-free, and spatter-free during welding, and has the advantages of no environmental pollution in the manufa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/362B23K9/18
CPCB23K35/362B23K35/3605B23K9/18
Inventor 王聪陈昂然王占军钟明张进
Owner NORTHEASTERN UNIV LIAONING
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