Electronic gun chamber for electron beam smelting furnace inflated with argon

Abstract

The invention aims to provide an electronic gun chamber for an electron beam smelting furnace inflated with argon, which is used for solving the problems of stabilizing electron beam deflection and achieving accurate focus scanning. An argon flow control valve is arranged in the electronic gun chamber, the electronic gun chamber is inflated with the argon, the flow of the inflated argon is moderately controlled, the argon is ionized under the effect of a high-voltage electric field to generate positive charge so as to neutralize escaped electrons, and the effects of stabilizing electron beam deflection and achieving accurate focus scanning are achieved. By the electronic gun chamber, the problem of electron beam drift is solved, the smelting effective power can also be fully developed, moreover, the electron beam scanning is accurate and is clear in track, and the quality of ingot is stable and excellent. Moreover, by focus and accurate scanning of an electron beam, the smelting effective power can also be fully developed, and the service lifetime of the electronic gun is remarkably prolonged.

Description

technical field [0001] The invention belongs to the technical field of metal smelting, and relates to an electron beam melting furnace, in particular to an electron gun chamber for an electron beam melting furnace filled with argon. Background technique [0002] Electron beam melting furnace (hereinafter referred to as "electron beam furnace") is in the state of vacuum and high-voltage direct current electric field, usually under the action of 40kv, hot electrons escape to form electron beams, which hit the melting material at a very high speed On the material, the huge kinetic energy is converted into heat energy, melting the high-melting point metal, and the melting temperature is as high as about 3500 degrees Celsius. At present, the smelting and purification of refractory metals such as tantalum, niobium, and tungsten all use electron beam furnaces, and the low-melting point metal impurities are volatilized first, thereby removing impurities to achieve the purpose of met...

AI Technical Summary

Problems solved by technology

However, the electron beam is negatively charged, and it is easy to drift when the beam current is large, and it is often impossible to accurately focus and concentrate the refractory materials, which affects the utilization of the effective power of the electron beam furnace, which is wasteful, and the electron beam scanning trajectory Not clear, also affects the quality of smelted ingots

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