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High-strength high-ductility fluorine alkalescent sintered flux

A technology of sintering flux and high toughness, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc. It can solve the problems that cannot meet the requirements of high strength and high toughness, so as to improve the performance of welding process, high and low temperature impact toughness, and guarantee The effect of surface quality

Inactive Publication Date: 2008-12-03
BAOJI YUSHENG WELDING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of existing welding materials cannot meet the welding requirements of high strength and high toughness

Method used

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  • High-strength high-ductility fluorine alkalescent sintered flux
  • High-strength high-ductility fluorine alkalescent sintered flux
  • High-strength high-ductility fluorine alkalescent sintered flux

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1 (flux batch number: 001):

[0017] (1) Flux composition (Wt%): MgO 24.8, CaF 2 25.8, Al 2 o 3 22.2, SiO 2 15.3, CaO5.3, MnO3.8, FeO2.3, Na 2 O 0.462, S 0.009, P 0.029.

[0018] (2) Alkalinity of flux (B IIW ): 2.25

[0019] (3) Preparation method: After the required raw materials are re-inspected, the processes of coarse crushing, fine crushing, and powder grinding are carried out, and processed into powders with different standard particle sizes. After sieving, carry out proportioning and weighing according to the formula, then put it into a dry blender for dry blending, put the evenly stirred powder into a wet blender, add about 20% of water glass for wet blending, stir well, stir well The wet material is sent to the granulator for granulation, and the granulated flux produced is sent to the drying furnace after being dried by hot air, and is dried at a temperature of 150°C to 200°C to remove moisture and then sieve and sieve. The flux within t...

Embodiment 2

[0022] Embodiment 2 (flux batch number: 002):

[0023] (1) Flux composition (Wt%): MgO 24.6, CaF 2 26.1, Al 2 o 3 22.7, SiO 2 15.1, CaO5.6, MnO3.4, FeO2.1, Na 2 O 0.367, S 0.007, P 0.026.

[0024] (2) Alkalinity of flux (B IIW ): 2.25

[0025] (3) Preparation method: same as Example 1.

[0026] (4) Test results of mechanical properties of deposited metal (with YS-H08D welding wire):

[0027]

Embodiment 3

[0028] Example three (flux batch number: 003)

[0029] (1) Flux composition (Wt%): MgO 25.2, CaF 2 25.2, Al 2 o 3 22.5, SiO 2 15.2, CaO5.6, MnO3.6, FeO2.3, Na 2 O 0.362, S 0.009, P 0.029.

[0030] (2) Alkalinity of flux (B IIW ): 2.24

[0031] (3) Preparation method: same as Example 1.

[0032] (4) Test results of mechanical properties of deposited metal (with YS-H08D welding wire):

[0033]

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PUM

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Abstract

The invention relates to a high-strength high-toughness fluoride-basic type sintered flux. The high-strength high-toughness fluoride-basic type sintered flux consists of the following compositions in percentage by weight: 22 to 26 percent of MgO, 25 to 27 percent of CaF2, 21 to 23 percent of Al2O3, 14 to 16 percent of SiO2, 4 to 7 percent of CaO, 3 to 5 percent of MnO, 0.3 to 0.6 percent of Na2, less than or equal to 3 percent of FeO, less than or equal to 0.03 percent of S and less than or equal to 0.04 percent of P. Through controlling a basicity (BI1W) scope of the sintered flux, the oxygen content and the impurity content in the sintered flux are reduced, thereby ensuring the purity of weld metal and improving low-temperature impact toughness of the weld metal. The high-strength high-toughness fluoride-basic type sintered flux is matched with a YS-H08D welding wire to weld a high-strength Q420q bridge structure steel; the weld metal has high low-temperature impact toughness, yield strength and tensile strength; a Charpy impact absorption work Akv(40 DEG C below zero) is between 169 and 202J; and the impact absorption power has small dispersion degree. The high-strength high-toughness fluoride-basic type sintered flux can be matched with a plurality of welding wires and can be used for welding a plurality of low alloy steels such as a spiral seam hidden arc welding steel tube of an X80 steel grade, which also has high low-temperature impact toughness.

Description

technical field [0001] The invention relates to a high-strength and high-toughness fluorine-alkali sintered flux, which is mainly used for submerged arc welding of high-strength Q420q structural steel of railway bridges, and welding of bridge steels such as Q345q and Q375q. Background technique [0002] Flux is a material used for submerged arc automatic welding, which is divided into two categories: melting flux and sintering flux. Sintered flux has the advantages of continuous production, no pollution, high alkalinity, high welding strength, high plasticity and toughness, etc. It is widely used in bridges, pressure vessels, metal structures, shipbuilding, vehicles and petroleum Welding and manufacturing of natural gas transmission pipelines, etc. The sintered flux with low alkalinity, high silicon and manganese slag can easily obtain good process performance, but the impact toughness of the weld is not high. High-basic slag-based sintered flux is easy to obtain high-toug...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/362
Inventor 孟钰竣何少卿杜文利
Owner BAOJI YUSHENG WELDING MATERIAL
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