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Sintered flux for stainless steel surfacing with band electrode

A technology of sintering flux and stainless steel strip, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc. It can solve the problems of uneven flux quality, corrosion resistance and hydrogen stripping resistance that cannot meet the design requirements of pressure vessels, etc.

Active Publication Date: 2012-07-18
BEIJING JINWEI WELDING MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The quality of domestic matching flux is uneven, and the welding process, weld quality, especially the corrosion resistance and hydrogen stripping resistance of the surfacing metal are far from meeting the design requirements of pressure vessels

Method used

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  • Sintered flux for stainless steel surfacing with band electrode
  • Sintered flux for stainless steel surfacing with band electrode
  • Sintered flux for stainless steel surfacing with band electrode

Examples

Experimental program
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Embodiment 1

[0139] According to the component content designed in the present invention, each of the two kinds of fluxes is prepared with 6 kinds of flux powders, and the sintered flux for submerged arc (SAW) is denoted as S1~S6; E1~E6.

[0140] The flux components and the weight percentage of each component are shown in Table 1. The flux preparation method is as follows:

[0141] Sieve the required raw materials and weigh according to the formula. After rechecking the total weight, put the dry powder into the dry mixer for dry mixing. After dry mixing evenly, put it into the wet mixer, and add about 20% water glass for wet mixing. After mixing evenly, the wet powder is sent to the granulation tray through the conveyor belt for granulation. After the granulation is completed, it is sent to the drying furnace through the conveyor belt and dried at 250 ° C ~ 300 ° C. After removing moisture, the flux is sieved. The sieved flux within the standard particle size range is sent to the sinterin...

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Abstract

The invention relates to a sintered flux for stainless steel surfacing with band electrode. One technical scheme of the sintered flux for stainless steel surfacing with band electrode includes that the sintered flux is formed by sintering the following components and the proportioned raw materials or materials, including 15-30 parts of CaF2, 20-50 parts of MgO, 1-10 parts of Al2O3, 15-30 parts of CaO, 25-50 parts of SiO2, and 1-5 parts of alloy powder. The another technical scheme includes that the sintered flux for stainless steel surfacing with band electrode comprises the following components and the proportioned raw materials or materials including 60-80 parts of CaF2,20-40 parts of Al2O3, 1-5 parts of CaO, 1-5 parts of SiO2, and 1-5 parts of alloy powder. The sintered flux has excellent performance and can meet the service requirements completely.

Description

technical field [0001] The invention belongs to the field of welding materials, and in particular relates to a sintered flux for surfacing welding of stainless steel strips. The sintered flux for surfacing welding of stainless steel strips is widely used in the surfacing welding of stainless steel on the inner wall of thick-walled pressure vessels in the fields of petroleum and chemical industry. Background technique [0002] In recent years, with the development of the petrochemical industry, high-temperature, high-pressure, and corrosion-resistant pressure vessels tend to be large-scale and large-scale, such as thick-walled pressure vessels such as hydrogenation reactors, raw flow synthesis towers, and coal liquefaction reactors. In the manufacture of such thick-walled pressure vessels, in order to reduce costs, the common manufacturing method is to use low-alloy steel forging or thick plate coiling to make the cylinder and head, and then surfacing stainless steel lining o...

Claims

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Application Information

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IPC IPC(8): B23K35/362
Inventor 夏毅冰王学东李伟陈波王士山李柱王磊卢兰志李钊
Owner BEIJING JINWEI WELDING MATERIAL
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