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Agglomerated flux for strip submerged arc surfacing

A technology of submerged arc surfacing and sintering flux, applied in welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of insufficient effective chemical composition of surfacing layer, high oxidizing property, difficulty in slag removal, etc. Excellent resistance to intergranular corrosion, less carburizing effect of weld metal, and easy slag removal

Inactive Publication Date: 2011-09-28
LUOYANG SHUANGRUI SPECIAL ALLOY MATERIALS
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  • Description
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Problems solved by technology

The sintered flux has a small loose-to-load ratio, and the appropriate alloy agent can be added to the flux, so the amount of flux consumed during the welding process is small, and the chemical composition of the surfacing layer is easy to meet the requirements. Carburization, sulfur, and phosphorus effects of the welding layer; due to its high oxidizing properties, the smelting flux is likely to cause insufficient effective chemical composition and carburization of the surfacing layer, especially due to the oxidation of niobium during surfacing welding of niobium-containing steel strips. Difficulty in removing slag

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  • Agglomerated flux for strip submerged arc surfacing

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Embodiment Construction

[0021] The present invention can be explained in more detail with reference to the following examples; however, the present invention is not limited to these examples.

[0022] According to the design component content of the present invention, 5 kinds of flux powders were prepared, water glass was used as the binder, and the fluxes were sintered at high temperature as test fluxes, respectively recorded as F1-F5.

[0023] The five kinds of flux components are listed in Table 1 below. They are respectively matched with 309L and 347L steel strips with a width of 60mm and a thickness of 0.5mm for surfacing tests. The test steel plates are 40mm16MnR steel plates;

[0024] Among them, the chemical composition of the steel strip and the base metal is listed in Table 2;

[0025] The surfacing welding process parameters are shown in Table 3;

[0026] Among them, the flux surfacing process performance is listed in Table 4;

[0027] In order to carry out the chemical composition analy...

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Abstract

The present invention discloses an agglomerated flux for strip submerged arc surfacing, belonging to the field of welding material technology. According to the weight percentage, the agglomerated flux comprises the following chemical compositions: 3.0-12.0% of CaF2, 20.0-40.0% of SiO2, 0-2.0% of MnO, 9.0-30.0% of Al2O3, 15.0-35.0% of MgO, 1.0-15.0% of CaO, 0-1.5% of NaF, 0-5.0% of ZrO2, 1.0-5.0% of alloying agent and the balance of unavoidable impurities. The agglomerated flux for strip submerged arc surfacing has reasonably designed composition, ensures excellent corrosion-resistant performance of the surfacing layer, has wide welding parameters, and is especially applicable to the corrosion-resistant layer surfacing of stainless strips. welding parameters, and is especially applicable to the corrosion-resistant layer surfacing of stainless strips.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a sintered flux for submerged-arc surfacing welding with electrodes that can be used for large-area surfacing welding of inner linings of pressure vessels such as nuclear reactors, petroleum hydrogenation reactors, and fertilizer synthesis towers. Background technique [0002] With the development of petroleum, chemical and nuclear industries, the demand for thick-walled pressure vessels has greatly increased. Such containers operate under high temperature and high pressure environment, and most of them are corroded by the medium, so the flux is required to have sufficient corrosion resistance. Due to the large wall thickness of the container, if the whole is made of stainless steel, it is not economical and difficult. Therefore, the currently widely used manufacturing method is to carry out stainless steel surfacing welding on the inner wall of the containe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/362
Inventor 孔红雨周浩鲁晓声
Owner LUOYANG SHUANGRUI SPECIAL ALLOY MATERIALS
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