A method for repairing submerged arc welding contact tip based on low pressure cold spraying technology
A contact tip and submerged arc welding technology, which is applied in the field of repairing submerged arc welding contact tips based on low-pressure cold spraying technology, can solve the problems of high cost of repairing contact tips, lack of repair technology and materials, and high equipment and labor costs, achieving a combination of Good strength, excellent wear resistance, good wear resistance effect
Active Publication Date: 2020-04-28
LANZHOU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
The main reason for this phenomenon is that there is no suitable repair technology and materials
If the same material as the contact tip is used for repair, the wear resistance of the repaired contact tip is poor, and it is not as good as the contact tip processed from the processed copper block material.
If the current popular 3D printing technology is used to repair the contact tip, the equipment and labor costs are too high, and the cost of repairing the contact tip is even higher than the price of the new contact tip
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[0025] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
[0026] An embodiment of the present invention provides a method for repairing a submerged arc welding contact tip based on low-pressure cold spray technology, including the following steps:
[0027] S1. Sand blast the damaged submerged arc welding contact tip before spraying;
[0028] S2. Use self-made powder materials to carry out all-round cold spray repair treatment on the damaged submerged arc welding nozzle after sand blasting treatment; the spray parameters are: the working gas of cold spray...
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Abstract
The invention discloses a method for repairing a submerged-arc welding conductive nozzle based on low-pressure cold spraying technology. The method comprises the following steps that S1, blasting treatment is performed on the damaged submerged-arc welding conductive nozzle before spraying; S2, omni-directional cold spraying repair treatment is performed on the damaged submerged arc welding nozzlesubjected to sand blasting treatment by adopting a self-made powder material, wherein the spraying parameters are as follows: cold spraying working gas is compressed air, the carrying temperature is 450-500 DEG C, the carrier gas pressure is 0.6-0.8 MPa, the spraying distance is 10-20mm, and the spraying speed is 0.4-0.6m / s; and S3, the repaired submerged arc welding conductive nozzle is put intoa heat treatment furnace, and after heat treatment for 2 hours, the submerged arc welding conductive nozzle is cooled with the furnace and taken out, and the repaired conductive nozzle is obtained. According to the method, the worn part of the submerged-arc welding conductive nozzle is repaired through the self-made powder, the use function of the conductive nozzle is restored, the cost is saved,the wear resistance of the submerged-arc welding conductive nozzle is improved, and the service life of the submerged-arc welding conductive nozzle is prolonged.
Description
technical field [0001] The invention relates to the field of material repair, in particular to a method for repairing a submerged arc welding contact tip based on a low-pressure cold spraying technology. Background technique [0002] Cold spraying, also known as cold air dynamic spraying method, is a spraying technology based on the principle of aerodynamics. Compared with other spraying technologies, cold air dynamic spraying has the advantages of dense coating structure, low porosity, and particles are not easy to oxidize, phase change, Advantages such as decarburization and tissue change. According to the pressure of the compressed gas, cold air power spraying can be divided into high pressure cold air power spraying (greater than 15 atmospheres) and low pressure cold air power spraying (less than 10 atmospheres). Compared with low-pressure cold air dynamic spraying, the preparation process of high-pressure cold air dynamic spraying has the advantages of high gas pressur...
Claims
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IPC IPC(8): C23C24/04B23P6/00
Inventor 冯力畅继荣安国升李文生李洞亭
Owner LANZHOU UNIVERSITY OF TECHNOLOGY