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众所周知,熔铸高温难熔活性金属(例如钨、钼、钽、铌、钛、铀等)技术关键是:熔点高,高温时化学性能活泼,在熔融状态下几乎同所有物质都能发生化学反应。到目前为止,熔铸高温活性金属的设备只有一种即:“真空凝壳炉”。即在真空状态下,采用能使被熔金属外表结成薄壳的坩埚,用电弧、电子束或等离子束从坩埚中心加热的设备。这种炉子的特点是:1.熔化和浇铸都在真空
It is well-known that the key technologies of melting and casting high-temperature refractory active metals (such as tungsten, molybdenum, tantalum, niobium, titanium and uranium) are: high melting point, active chemicality at high temperature and chemical reaction with almost all substances in the molten state. So far, there is only one type of equipment for casting high-temperature active metals, namely: “vacuum coagulation furnace”. That is, in a vacuum state, a crucible made of a thin shell made of molten metal, a device for heating from the center of the crucible with an arc, an electron beam or a plasma beam is used. The characteristics of this stove are: 1. Both melting and casting are under vacuum