PROCESS FOR PRODUCING CHROMIUM-CONTAINING STAINLESS STEEL STRIP WITH EXCELLENT TOUGHNESS OF HIGH TENSION CHROME-STAINLESS STEEL

摘要

In order to produce thin strip strips with high cast strip toughness from thin strip cast strips of Cr-stainless steel containing Nb, Ti and Al in an amount of 0.05% or more, the process is characterized in that the steel contains 13-25% by weight of Cr, 0.05 to 1% by weight of one or more of Ti, Al and V, 0.03% by weight or less of C, 0.03% by weight or less of N, and 0.3-3% Or less Casting a thin sheet cast strip of Cr-stainless steel, having a p-value of 10 mm or less; Hot-rolling the thin sheet strip at a reduction rate of 5-50% at a temperature of 1150-950C to form a thin strip; At a temperature of 1150-950C, the thin strip is cooled slowly at a rate of 20C / sec or less, or 5 seconds or more of the thin strip is left; RTI ID = 0.0 700 C /RTI ;P (%) = 420C + 470N + 23Ni + 9Cu + 7Mn-11.5Cr-11.5Si-12Mo-23V-47Nb-49Ti-52Al + 189