R, R, C method and equipment for casting amorphous, ultra-microcrystalline, microcrystalline and the like metal profiles

An R,R,C method and equipment for casting amorphous, ultra-microcrystalline, microcrystalline, metal profiles, comprising a working chamber of an exhaust hood, and a working cold source of liquid nitrogen are used, the working chamber of the exhaust hood is located at the outlet of a hot mold, and a fixed thickness of liquid nitrogen layer by a liquid nitrogen ejector, and the ejected liquid nitrogen intersects to pulled-out metal slabs or profiles at cross section C where the temperature and pressure are required to be t=−190° C. and p=1.877 bar, the shape and size of an outlet section of the hot mold is the same as those of the produced slabs or profiles;

• for the casting of metal slabs, a traction mechanism for pulling metal slabs away from the outlet of hot mold with width of B and thickness of E, the traction speed is continuous casting speed u, small length metal slab Δm is pulled out in a time interval Δτ and ejected liquid nitrogen intersects to the pulled-out metal slabs at cross section C;
• in the same time interval Δτ as above, through a heat absorption and gasification process, ejected liquid nitrogen absorbs all the internal heat of small length metal slab Δm from initial rapid solidification and cooling temperature t1 to ending cooling temperature t2;
• the liquid metal of small length metal slabs Δm solidify into corresponding amorphous, ultra-microcrystalline, microcrystalline and fine grain metal structure at different cooling rates Vk, amorphous, ultra-microcrystalline, microcrystalline and fine grain ferrous and non-ferrous metal slabs with different specifications and brands can be casted continuously by repeating the process;
• at the same time with the heat absorption and gasification process of ejected liquid nitrogen, a powerful exhaust system exhausts the nitrogen produced by gasification of the ejected liquid nitrogen out from the working chamber of exhaust hood;
• the working chamber of exhaust hood is set at the outlet of the hot mold and the liquid nitrogen ejector;
• the temperature on cross section C is the ending cooling temperature t2;
• and
• (1) determining the calculation formula of production parameters only related to metal thermal properties and metal structure:
• cooling rate Vk, time interval Δτ of rapid solidification and cooling process, the small length metal slab Δm casted continuously within the time interval Δτ, continuous casting speed u;
• (2) determining the formula of parameters of liquid nitrogen ejection which are used in the technology of high ejection speed and extremely thin liquid film ejection and only related to metal thermal properties and heat contained in metal slabs:
• ejection volume of liquid nitrogen V, thickness of liquid nitrogen ejection layer h, ejection speed of liquid nitrogen K, and the volume of nitrogen Vg produced by the gasification of the ejection volume of liquid nitrogen V;
• (3) determining the calculation programs for casting amorphous, ultra-microcrystalline, microcrystalline and fine grain steel slabs or profiles with maximum thickness Emax and other thickness E;
• wherein, the first letter R in R,R,C method represents room temperature and is the first capital letter of room temperature;
• the second letter R represents rapid solidification and is the first capital letter of rapid solidification;
• the third letter C represents continuous casting and is the first capital letter of continuous casting.