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Amorphous smelting flux and preparation method and application thereof

A technology of smelting flux and amorphous state, which is applied in the welding of structural steel for ships and ocean engineering, amorphous smelting flux and its preparation, can solve the problem of affecting the safe use performance of marine equipment, the decline of weld mechanical properties, and the inability to To meet service requirements and other issues, achieve the effects of reducing defects, improving mechanical properties, and improving low-temperature impact toughness

Active Publication Date: 2021-11-26
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, when marine steel is welded under high heat input, especially when the heat input is greater than 50kJ / cm, the mechanical properties of the weld will be seriously reduced, even lower than the mechanical properties of the base steel plate, and sometimes hydrogen embrittlement
The above problems will affect the safe use performance of marine engineering equipment, causing it to fail to meet service requirements

Method used

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  • Amorphous smelting flux and preparation method and application thereof
  • Amorphous smelting flux and preparation method and application thereof
  • Amorphous smelting flux and preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0082] The amorphous smelting flux provided in this embodiment is made of the following components in terms of mass percentage: CaF 2 25%, CaO 35%, SiO 2 35% and TiO 2 5%.

[0083] The preparation method of the amorphous molten flux provided in this embodiment comprises the following steps:

[0084] (1) After crushing each raw material to a particle size of 80 mesh, weigh it according to the above mass percentage, then pour each weighed raw material into a blender, mix and stir for 30 minutes, and put it into an electric furnace for melting after stirring evenly. The temperature is 1450°C, and the temperature is kept for 20 minutes to obtain the molten material;

[0085] (2) Water quenching and granulation of the molten material obtained in step (1) to obtain a semi-finished product of gray-black amorphous flux particles; the mass ratio of the molten material to the water used for water quenching is 1:12;

[0086] (3) Put the semi-finished product of amorphous flux parti...

Embodiment 2

[0088] The amorphous smelting flux provided in this embodiment is made of the following components in terms of mass percentage: CaF 2 23%, CaO 33%, SiO 2 33% and TiO 2 11%.

[0089] The preparation method of the amorphous molten flux provided in this embodiment comprises the following steps:

[0090] (1) After crushing each raw material to a particle size of 120 mesh, weigh it according to the above mass percentage, then pour each weighed raw material into a blender, mix and stir for 20 minutes, and put it into an electric furnace for melting after stirring evenly. The temperature is 1480°C, and the temperature is kept for 20 minutes to obtain the molten material;

[0091] (2) Water-quenching and granulating the molten material obtained in step (1) to obtain a semi-finished product of gray-black amorphous flux particles; the mass ratio of the molten material to the water used for water quenching is 1:15;

[0092] (3) Put the semi-finished product of amorphous flux partic...

Embodiment 3

[0094] The amorphous smelting flux provided in this embodiment is made of the following components in terms of mass percentage: CaF 2 20%, CaO 32.5%, SiO 2 32.5% and TiO 2 15%.

[0095] The preparation method of the amorphous molten flux provided in this embodiment comprises the following steps:

[0096] (1) After crushing each raw material to a particle size of 100 mesh, weigh it according to the above mass percentage, then pour each weighed raw material into a blender, mix and stir for 25 minutes, and put it into an electric furnace for melting after stirring evenly. The temperature is 1500°C, and the temperature is kept for 15 minutes to obtain the molten material;

[0097] (2) Water-quenching and granulating the molten material obtained in step (1) to obtain a gray-black semi-finished product of amorphous flux particles; the mass ratio of the molten material to the water used for water quenching is 1:14;

[0098] (3) Put the semi-finished product of amorphous flux pa...

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Abstract

The invention relates to the technical field of welding, in particular to an amorphous smelting flux and a preparation method and application thereof. The amorphous smelting flux is prepared from the following components including, by mass percent, 20%-25% of CaF2, 30%-35% of CaO, 30%-35% of SiO2 and 5%-15% of TiO2. The amorphous smelting flux has the advantages of being free of moisture absorption, good in slag detachability, capable of effectively reducing the contents of harmful elements such as P and S in a welding seam and the like by adopting the specific components and dosages thereof. Meanwhile, the flux is in an amorphous state, the welding seam obtained after welding is uniform in composition, the mechanical property of the welding seam is excellent, and particularly the low-temperature toughness of the welding seam is good.

Description

technical field [0001] The present invention relates to the field of welding technology, in particular, to an amorphous smelting flux and its preparation method and application, more specifically, to an amorphous smelting flux and its preparation method, and structures for ships and marine engineering Steel welding methods. Background technique [0002] With the development of resource mining from shallow sea to deep sea and polar alpine regions, the application environment of marine engineering equipment is more complex, so the requirements for materials are getting higher and higher. Marine steel is welded with large heat input energy during use, and the large heat input submerged arc welding technology can significantly improve the efficiency of welding operations. Therefore, the large heat input submerged arc welding technology has gradually become an important means of efficient manufacturing of marine engineering steel. [0003] However, when marine steel is welded un...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/362B23K35/40B23K9/18
CPCB23K35/3602B23K35/362B23K35/0255B23K35/40B23K9/18
Inventor 王聪张燕云王占军钟明袁晓波
Owner NORTHEASTERN UNIV LIAONING
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