Patent ID: 6358338
Filing Date: 2002-03-19
Classification: C21D,C22C

Abstract:
A process for producing strip made of an iron-carbon-manganese alloy comprising:casting a thin strip, having a thickness of 1.5 to 10 mm, directly on a casting machine from a liquid metal composition having, in percentages by weight: C ranging between 0.001 and 1.6%; Mn ranging between 6 and 30%; Ni&lE;10% and with (Mn+Ni) ranging between 16 and 30%; Si&lE;2.5%; Al&lE;6%; Cr&lE;10%; (P+Sn+Sb+As)&lE;0.2%; (S+Se+T)&lE;0.5%; (V+Ti+Nb+B+Zr+rare earths)&lE;3%; (Mo+W)&lE;0.5%; N&lE;0.3%; Cu&lE;5%, the balance being iron and impurities resulting from the smelting; 0.5%; (V+Ti+Nb+B+Zr+rare earths)&lE;3%; (Mo+W)&lE;0.5%; N&lE;0.3%; Cu&lE;5%, the balance being iron and impurities resulting from the smelting; cold rolling said strip with a reduction ratio ranging between 10 and 90% in one or more steps; and recrystallization annealing said strip.