Vacuum electron beam cold hearth smelting furnace system capable of reducing evaporation coatings

Abstract

The invention discloses a vacuum electron beam cold hearth smelting furnace system which comprises a smelting unit, a vacuum pumping unit and an evaporation material pumping unit. The smelting unit comprises an EB furnace body, and a casting crucible and a horizontal crucible are arranged in the EB furnace body; the vacuum pumping unit comprises a diffusion pump, and the EB furnace body is communicated with the diffusion pump through a vacuum pumping pipeline; the evaporation material pumping unit comprises a powder settling cavity and a diffusion pump, the EB furnace body is communicated with the diffusion pump through an evaporation material pumping pipeline, and an inlet of the evaporation material pumping pipeline is formed above the horizontal crucible; the evaporated material extraction pipeline comprises a plurality of sections, the axis directions of the adjacent sections are different, and a powder settling cavity is formed in the bottom of the joint of the adjacent sections. Through the arrangement of the evaporation material pumping unit, evaporation materials generated by evaporation of impurities and raw materials are collected, contact between the EB furnace body and the evaporation materials is greatly reduced, and the forming rate of an evaporation coating is greatly decreased.

Description

technical field [0001] The invention relates to a vacuum electron beam cooling bed melting furnace, in particular to a vacuum electron beam cooling bed melting furnace system for reducing evaporation coating. Background technique [0002] Vacuum electron beam cooling bed melting furnace, also called EB melting furnace, is an electric furnace that uses high-speed moving electrons to bombard materials in a vacuum state for energy exchange, so that the materials are heated and melted and cast into shape. It is mostly used for melting low-oxygen materials. In process. Evaporation coating, also known as slag, is the melting and casting process of raw materials. When the boiling point of individual impurities and raw materials is reached, individual impurities and raw materials evaporate, and a layer of metal coating will be formed in the EB furnace working room, which is easy to fall off and affect the quality of casting products. , affecting the cooling effect of the working ch...

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Problems solved by technology

[0005] The invention designs a vacuum electron beam cooling bed smelting furnace system, which is used to solve the defects that the evaporation coating affects the casting quality of materials and hinders the mass production of materials

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