PROCESS FOR THE CONTINUOUS CASTING OF AN AUSTENITIC STAINLESS STEEL ONTO ONE OR BETWEEN TWO MOVING WALLS, AND CASTING PLANT FOR APPLYING THE PROCESS

摘要

The invention relates to a process for the continuous casting of an austenitic stainless steel strip onto one or between two moving walls and to a casting plant for applying the process. According to the invention, the process consists of the continous casting of an austenitic stainless steel strip directly from the liquid metal with the following composition expressed by weight percentage: C0.08%, Si1%, Mn2%, P0.045%, S0.030%, Cr between 17.0 and 20%, Ni between 8.0 and 10.5%, using a machine for casting onto one or between two moving walls whose external surface is provided with dimples, the region surrounding the meniscus being inert, with an inert gas of controlled composition, the ratio Cr echiv./Ni echiv. of the liquid metal being higher than 1.55, where Cr echiv.=% Cr+1.37x % Mo+1.5 x % Si+2 x % Nb+3 x % Ti and Ni echiv.= % Ni+0.31 x % Mn +22 x % C + 14.2 x %N +% Cu. The claimed installation for applying the process comprises one or several moving walls provided on their entire surface with touching dimples whose diameter ranges between 100 and 1500 mium and whose depth ranges between 20 and 150 mium. An inert gas consisting, at least in part, of a steel-soluble gas is employed.