防止S31803双相钢5mm热连轧卷板边裂的工艺实践  

Process Practice to Prevent Edge Crack of 5mm Hot Continuous-Rolled Strip Coil of S31803 Duplex Stainless Steel

作　　者：李国平[1] 张威[1] 李俊[1] 范新智 

机构地区：[1]太原钢铁(集团)有限公司技术中心,太原030003

出　　处：《特殊钢》2010年第1期36-37,共2页Special Steel

摘　　要：S31803双相不锈钢(%:0.019C、22.50Cr、5.40Ni、3.15Mo、0.18N)200 mm连铸坯热轧成5 mm卷板易产生边裂。通过控制钢中S含量≤0.005%,加RE-Si-Fe合金变质硫化物,将钢中氧含量由53×100^(-6)降至26×10^(-6),提高铸坯等轴晶比例,控制铸坯加热温度1150～1250℃,有效地防止5 mm热连轧卷板边裂的产生。Edge crack of 5 mm strip coil of S31803 duplex stainless steel （% ：0. 019C,22. 50Cr,5.40Ni,3.15Mo, 0. 18N） rolled from 200 mm slab is often occurred. It is available to prevent the formation of edge crack of 5 mm hot con- tinuous-rolled strip coil by controlling S content in steel ≤0. 005% and adding RE-Si-Fe alloy to modify sulfide, decreasing oxygen content in steel from 53 ×10-6 to 26×10-6, increasing equiaxed zone ratio in cast slab, and.controlling slab heating temperature at 1 150 - 1 250 ℃.

关 键 词：双相不锈钢 热连轧卷板 边裂 工艺改进 

分 类 号：TG335.11[金属学及工艺—金属压力加工]