L, R, C METHOD AND EQUIPMENT FOR CONTINUOUS CASTING AMORPHOUS, ULTRACRYSTALLITE AND CRYSTALLITE METALLIC SLAB OR STRIP

摘要

The present invention relates to a continuous casting equipment and a L,R,C method thereof for manufacturing amorphous, ultracrystallite and crystallite metallic slab or strip. A workroom (8) of which constant temperature t_b is -190°C and constant pressure p_b is 1 bar, and liquid nitrogen of -190°C and 1.877bar are used as cold source. Liquid nitrogen ejector (5) ejects said liquid nitrogen to the surface of ferrous or non-ferrous metal slab or strip (7) with a different injection quantity v and a different jet velocity k. The ejected liquid nitrogen contacts the slab or strip at the section c showing in figure 2. The method adopts ultrathin film ejecting technology, the constant thickness of said film is 2mm and the ejecting speed Kmax of said liquid nitrogen is 30m/s. During interval ?t corresponding different cooling rate Vk, a guiding traction mechanism (6) pulls different length ?m of metal slab or strip from the mold outlet (4) with different continuous casting speed u. Due to the cooling of ejected liquid nitrogen, the metal slab or strip is solidified rapidly and cooled to be an amorphous ultracrystallite, crystallite metal structure.