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Ceramic surfacing-welding electrode for restoring ceramic composite steel pipe and surfacing-welding method

A technology of composite steel pipes and ceramic stacks, which is applied in welding/welding/cutting items, welding media, welding equipment, etc., can solve problems such as difficulty in meeting use requirements, and achieve the effects of low cost, simple equipment and high material utilization rate

Inactive Publication Date: 2010-05-12
江阴东大新材料研究院
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Difficult to meet the use requirements in high temperature environment

Method used

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Embodiment Construction

[0016] The present invention is described in detail below:

[0017] The ceramic surfacing welding electrode and the surfacing welding method for repairing ceramic composite steel pipes that the present invention relates to are as follows:

[0018] by the formula Fe 2 o 3 +2Al=Al 2 o 3 +2Fe+828.894 (kJ) to prepare thermite flux, add different proportions of alumina to the thermite flux and mix them well. Made of thermite fluxes containing different proportions of alumina. A proper amount of water-soluble organic sol is stirred and mixed with the thermite flux containing different proportions of alumina for 4-6 hours. Then, the thermite flux containing water-soluble organosol and alumina is poured into a mold with a filter at the bottom for filtration. Then, according to the volume fraction requirements of the ceramic welding rod preform, a hydraulic press and upper and lower semicircular molds are used to press a certain pressure into a semi-finished round rod-shaped cera...

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Abstract

The invention relates to a ceramic surfacing-welding electrode for restoring a ceramic composite steel pipe and a surfacing-welding method. The surfacing-welding method comprises the following processes: preparing an aluminium thermal soldering flux, adding alumina of different proportions in the aluminium thermal soldering flux and uniformly mixing the mixture respectively so as to prepare the aluminium thermal soldering flux containing the alumina of different proportions, and mixing a water-soluble organosol and the aluminium thermal soldering flux containing the alumina of different proportions; subsequently adopting a hydraulic machine and an upper semi-round die as well as a lower semi-round die to press and prepare a prefabricated blank semi-finished product of the round bar-shaped ceramic electrode; subsequently, arranging the prefabricated blank semi-finished product of the round bar-shaped ceramic electrode in a drying furnace which is vacuum or protected by argon, heating the drying furnace to the temperature of 350 plus or minus 100 DEG C, drying the drying furnace so as to remove the gas for 4 plus or minus 1 hours; burning the gas; burying the semi-finished product in the sand after burning; waiting for natural cooling and obtaining the round bar-shaped ceramic electrode; adopting an argon arc welder to carry out surfacing-welding operation layer by layer at a damaged position of the ceramic composite steel pipe by adopting the ceramic electrode according to the proportion of the alumina from high to low; and completing the restoration after surfacing-welding and grinding. The ceramic composite steel pipe restored by the method has good high temperature resistance.

Description

(1) Technical field [0001] The invention relates to a method for repairing ceramic composite steel pipes. It belongs to the field of welding technology. (2) Background technology [0002] The end part of the ceramic composite steel pipe is easily broken, and the welded part of the composite steel pipe is easy to wear out due to the discontinuity of the ceramic layer, and cracks sometimes appear in the ceramic layer. Currently, these defects are repaired with wear-resistant glue. Wear-resistant rubber has limited high temperature resistance. Difficult to meet the use requirements in high temperature environment. (3) Contents of the invention [0003] The object of the present invention is to overcome the above disadvantages, and provide a ceramic surfacing welding electrode and a surfacing welding method for repairing ceramic composite steel pipes with good high temperature resistance after repair. [0004] The purpose of the present invention is achieved in that a meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/34B23K35/40B23K9/04B23K9/095B23K9/16B23K103/16B23K101/06
Inventor 陈威谭佃龙汤秀山刘礼华李吉峰朱磊郑召全
Owner 江阴东大新材料研究院
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