| abstract |
Carbon steel steel product, intended to be galvanized, characterized in that it is in the form of a strip or a sheet obtained from a continuous cast half-product of composition by weight: - 0 , 0005% <= C <= 0.15%; - 0.08% <= Mn <= 2%; - If <= 0.040%, preferably <= 0.030%; Total Al <= 0.010%, preferably <= 0.004%; Soluble Al <0.004%; - 0.0050% <= 0 total <= 0.0500%, and preferably <= 0.0300%; P <= 0.20%, preferably <= 0.03%; S <= 0.10%, preferably <= 0.03%; each of Cu, Cr, Ni, Mo, W, Co <= 1%, preferably <= 0.5%; each of Ti, Nb, V, Zr <= 0.5%, preferably <= 0.2%; each of Sn, Sb, As <= 0.1%; B <= 0.1%, preferably <= 0.01%; N <= 0.0400%, preferably <= 0.0150%; the rest being iron and impurities resulting from the elaboration. Process for obtaining a steel semi-finished product, characterized in that: - a liquid steel whose contents in C, Mn, Si, Al, P, S, Cu, Cr, Ni, Mo, W, Co, Ti, Nb, V, Zr, Sn, Sb, As, B and N are as before, and whose dissolved oxygen content is maintained between 0.0050 and 0.0500% thanks to the establishment of a chemical balance between the metal and the pocket slag; and said steel is cast on a continuous casting machine. |