DEVICE FOR DIFFUSION METALLISATION IN MEDIUM OF LOW-MELTING LIQUID METAL SOLUTIONS Russian patent published in 2019 - IPC C23C10/18 C23C2/04 

FIELD: technological processes.

SUBSTANCE: device relates to installations for diffusion metallisation of articles for imparting the required physical and chemical properties to surface layers and can be used in machine building, tool industry and other fields. Device for diffusion metallization of articles in a low-melting liquid metal melt comprises a sealed housing in which there is a furnace with a bath with low-melting liquid metal melt for diffusion metallisation, sluice chambers, a device for moving coated articles inside the housing and a system for evacuation and filling the housing with an inert gas. Housing is made in the form of closed shaft divided by vertical heat-insulating baffle into two chambers – cold and hot, at that to the housing from the cold chamber side loading and unloading lock chambers are tightly connected. Vacuum gates are installed between the sluice chambers and the body, at the same time in the hot chamber there are at least two furnaces of elongated shape. First furnace is a furnace with a bath with low-melting liquid metal melt for diffusion metallisation, in the second furnace there is a bath with salt melt, which provides for cleaning of items from melt traces and, if necessary, isothermal quenching of material of articles. Device for moving coated articles inside the body is a suspension closed monorail conveyor with carriages placed in the upper part of the body, to which unsealed loading containers are attached, inside which the coated articles are placed. On said containers there are covers for sealing baths with low-melting liquid metal melt and with salt melt.

EFFECT: enabling application of diffusion coatings on long items such as pipes, screws and similar articles from medium of low-melting liquid metal solutions under conditions of mass production with simultaneous combination of coating processes with thermal treatment of material of articles.

1 cl, 2 dwg