Stainless steel AUSTENITIC FERRITIC, the manufacturing process of a plate, a belt or a coil hot rolled steel.The manufacturing process of a bar or a wire, hot rolled steel, the manufacturing process of a profiled steel and the manufacturing process of a forged part in steel.

摘要

AUSTENITIC FERRITIC STAINLESS action with machinability is improved.The present invention relates to a composition of Austenitic - ferritic stainless steel, the composition comprises in% by weight 0.01% 243 C 243 0,10%, 20% 243 CR 243 24.0%, 1.0% 243 Ni 243 3.0%, 0.12% 243 n 243 n 243 0.20%, 0.5% 243 Mn 2.0%, 1.6% 243 Cu 3.0 243%, 0,5% I 243 243 1.0% w 243 0,15%, 0.05% I + 243 w / 2 243 1.0%, 0.2 243 you 1,5%, Al 243 0.05% V 243 0,5% Nb 243 0,5%, Ti 243 0,5%, b 243 0.003%.Ci 243 0,5% REM 243 0,1%, CA 243 0.03%, Mg 243 1% and 243 0005%, 243 0,01% s 243 0.030%, P 23 40%,The rest being iron and impurities resulting from the production and the microstructure consisting of austenite and ferrite 35 to 65% by volume, the composition while respecting, in addition,The following relationships: 40 243 If 243 6 with if = 10% Cr + 5,1% Mo + 1.4% Mn + 24.3% Si + 35% Nb + Ti 595,4 71.5%% C - 245,1% n - 9.3% Ni - 3.3% Cu and 99.8 irchcu 32, with 242 ircgcu =% Cr + 3.3% Mo + 2% Cu + 16% N + 2.6% Ni 0.7% Mn and 0 243 UI 243 6,0 with UI = 3% Ni +% Cu +% Mn - 100% C - 25% n - 2 (% Cr +% Si) - 6% Mo + 45, as well as a process for manufacturing plates, tape, coil, bar. Wire, profiled, forgings.Molded parts in the steel