A prefabricated material for weld crack defects of electric power steel structure and its preparation method

Abstract

The invention discloses a material suitable for prefabrication of electric steel structure weld crack defects and a preparation method thereof, wherein the prefabrication material comprises three layers, which are an inorganic high temperature resistant layer, a carbon fiber tow layer, and an inorganic high temperature resistant layer in sequence from top to bottom , the preparation method is to first coat the inorganic high temperature resistant adhesive on the PVA high temperature water-soluble film substrate, then lay the straight carbon fiber tow on the surface of the inorganic high temperature resistant adhesive in parallel, and then coat a layer of inorganic adhesive on the surface of the carbon fiber layer. High temperature resistant glue is used for encapsulation. After encapsulation, the whole is placed in a vacuum high-temperature furnace to dry and solidify. After drying, it is placed in hot water to dissolve the PVA film matrix, and then vacuum dried. The thickness of the defect prefabricated material prepared by the invention is not more than 0.5mm, and it is easy to cut and process. It is a material that can be used to accurately prefabricate and simulate weld crack defects, and has wide applications in scientific research and testing of steel structure welding defects.

Description

technical field [0001] The invention relates to a prefabricated material for weld crack defects in electric steel structures and a preparation method thereof, belonging to the technical field of electric power. Background technique [0002] In the power industry, steel pipe towers for transmission lines are formed by welding. Due to the limitation of manufacturing level and cost, there are often welding defects such as incomplete fusion, incomplete penetration, and pores during the welding process of steel pipe tower structures. During the operation of the steel pipe tower of the transmission line, it is subjected to alternating stress due to the influence of wind load and temperature difference stress, so cracks will initiate at the original welding defect and spread further. The generation and development of cracks will seriously weaken the bearing capacity of the steel pipe tower, resulting in the breakage or collapse of the transmission tower, resulting in large economic...

AI Technical Summary

Problems solved by technology

The generation and development of cracks will seriously weaken the bearing capacity of the steel pipe tower, resulting in the breakage or collapse of the transmission tower, resulting in large economic losses and social impact

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