Preparing method for lightning prevention and ablation resisting alloy

Abstract

The invention relates to a preparing method for a lightning prevention and ablation resisting alloy and belongs to the technical field of preparing of alloys. The preparing method includes the steps that firstly, nickel, tungsten and other metal are smashed and screened, and mixed powder is obtained; then, graphite is treated, and expanded graphite is obtained, wherein the graphite has good lightning prevention and arc ablation resistance properties; after the graphite is oxidized, active sites are led into the graphite through the microbial action, and then rare earth metal resistant to arc ablation is led into the graphite through in-situ deposition; and then alloy powder is pressed into a blank, the expansion graphite is wrapped at the outer portion of the alloy through the polydopamine action, a lightning prevention and arc ablation resisting film is formed after pressing to protect the alloy, and therefore the lightning prevention and ablation resisting alloy is obtained. The prepared lightning prevention and ablation resisting alloy has the relatively high arc ablation resisting capability and is not likely to be burnt out during arc combustion, the service life of the alloy is prolonged, and a wide application prospect is achieved.

Description

technical field [0001] The invention relates to a method for preparing a lightning protection and ablation resistant alloy, belonging to the technical field of alloy preparation. Background technique [0002] Overhead transmission lines are mostly located in remote areas, and are prone to lightning flashover and pollution flashover, threatening the safety of the power system. arc angle), when the overhead line is struck by lightning, a high lightning overvoltage is generated on the insulator string, but because the lightning impulse discharge voltage of the protection gap is lower than the discharge voltage of the insulator string, the protection gap discharges first, and the subsequent power frequency arc is Under the action of electromotive force and thermal stress, the discharge channel formed by the parallel gap is drawn to the end of the arc angle and fixed at the end of the arc angle to burn, thereby protecting the insulator string from arc burning, and then protecting...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the problem that the traditional materials for making lightning protection gaps have poor arc ablation resistance, and are easily burned when arcs burn, which reduces their service life, a graphite expansion, After oxidation treatment, microbes are used to increase the active sites inside the expanded graphite, and then the rare earth metals are deposited in situ, and then the graphite filled with rare earth metals is formed on the surface of the alloy by polydopamine to form a graphite film to prepare lightning protection The method of the ablation-resistant alloy, the present invention first crushes and sieves metals such as nickel and tungsten to obtain mixed powder, and then processes graphite to obtain expanded graphite, which has excellent lightning protection and arc ablation resistance, and then After its oxidation, the active sites are introduced into the interior through the action of microorganisms, and then the rare earth metals resistant to arc ablation are introduced into the interior through in-situ deposition, and then the alloy powder is pressed into a billet, and the expanded graphite is wrapped in the polydopamine. On the outside of the alloy, a lightning-proof and arc-resistant film is formed to protect the alloy after being pressed, thereby obtaining a lightning-proof and ablation-resistant alloy. burnout, which prolongs its service life and has broad application prospects