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Fluorine alkaline sintered flux and preparation method and application thereof

A technology of sintering flux and controller, applied in welding equipment, welding medium, manufacturing tools, etc., can solve the problems of oxide slag inclusion, pores, cracks, not suitable for X70 pipeline steel, impact toughness, etc., to achieve easy slag removal , Easy to operate, stable performance

Inactive Publication Date: 2020-09-18
济南市金材焊接材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As an important classification of sintered flux, basic sintered flux can effectively reduce the oxygen content of the weld, but due to the influence of the composition of the sintered flux, it is easy to cause oxide slag inclusions, pores, and cracks in the weld, resulting in poor impact toughness. Insufficient, especially in the welding process of X70 pipeline steel
X70 pipeline steel has become an international oil and natural gas long-distance pipeline because it can meet the requirements of forward large-diameter and high-pressure transmission required in the oil and gas pipeline transportation process, and it also has high strength, low-temperature toughness and excellent welding performance. The most used steel grade in steel, it also requires excellent low-temperature toughness for the flux used, but the general alkaline sintered flux cannot meet this requirement, so it is not suitable for X70 pipeline steel

Method used

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  • Fluorine alkaline sintered flux and preparation method and application thereof
  • Fluorine alkaline sintered flux and preparation method and application thereof
  • Fluorine alkaline sintered flux and preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example 1

[0043] Preparation of nickel manganese alloy:

[0044] S1: Take 1 part by weight of nickel and 3 parts by weight of manganese, respectively add them to the crucible in the high-temperature evaporator, check that the airtightness of the reaction system is qualified, vacuumize the reaction system, and then open the nitrogen gas arranged at the bottom of the high-temperature evaporator Valve, the reaction system is filled with nitrogen, so that the atmosphere in the reaction system is inert and the internal pressure of the reaction system is 1.4 atmospheres;

[0045] S2: Turn on the plasma gun arranged on the top of the high-temperature evaporator, use the generated high-frequency plasma nitrogen as a heating source to heat and evaporate the nickel and manganese raw materials, and heat the nickel and manganese raw materials to a boiling state to form nickel vapor and manganese vapor. A mixed vapor of nickel vapor and manganese vapor is formed in the high-temperature evaporator, a...

Embodiment 1

[0049]Weigh each raw material by weight, be placed in mixer, add the potassium sodium water glass of 21 weight parts and carry out mechanical stirring 5min; After stirring, enter granulator and carry out granulation, enter drying machine after and dry; Screening is carried out, and materials with a particle size of 10-40 mesh are taken into a sintering furnace for sintering at a temperature of 850°C. The sintered materials are placed in a cooling cylinder for natural cooling to obtain the product. The specific raw materials and dosage are shown in Table 1.

Embodiment 2

[0051] Take each raw material by weight, be placed in mixer, add the potassium sodium water glass of 23 weight parts and carry out mechanical stirring 5min; After stirring, enter granulator and carry out granulation, enter drying machine after and dry; Screening is carried out, and materials with a particle size of 10-40 mesh are taken into a sintering furnace for sintering at a temperature of 810°C. The sintered materials are placed in a cooling cylinder for natural cooling to obtain the product. The specific raw materials and dosage are shown in Table 1.

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Abstract

The invention discloses a fluorine alkaline sintered flux. The fluorine alkaline sintered flux is formed in the manner that the raw materials comprising, by weight, 4-5 parts of manganese ores, 22-27parts of alumina, 27-33 parts of dead-burned magnesia, 20-25 parts of fluorite powder, 1-2 parts of ferrosilicon and 5-10 parts of wollastonite are added to 21-27 parts of sodium potassium silicate and undergo sintering. The prepared fluorine alkaline sintered flux has excellent low-temperature impact resistance. The invention also provides a specific preparation method of the fluorine alkaline sintered flux and the application of the fluorine alkaline sintered flux to X70 pipeline steel welding. The fluorine alkaline sintered flux prepared through sintering can be completely applied to X70 pipeline steel.

Description

technical field [0001] The invention relates to the technical field of flux, more specifically, it relates to a fluorine-alkali sintered flux, and provides its preparation method and application. Background technique [0002] Submerged arc welding is one of the mechanized welding methods with high production efficiency today. The conductive length of the welding wire is shortened, and the current and current density are increased. Therefore, the penetration depth of the arc and the deposition efficiency of the welding wire are greatly improved. Function, there is basically no heat radiation loss on the arc, and there is less spatter, so its production efficiency is high. In addition, the slag has a good protection effect in insulating the air. The welding parameters can be kept stable through automatic adjustment, and the technical level of welders is not high. The composition of the weld is stable, and the mechanical properties are relatively good. At the same time, it has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/362
CPCB23K35/362
Inventor 张才林李长斌尹兆杰
Owner 济南市金材焊接材料有限公司
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