摘要
在连铸连轧生产线采用铁素体轧制技术制备了低碳钢热轧薄板,并对所制备的薄板进行了力学性能、组织及织构分析。结果表明,铁素体轧制低碳钢薄板的组织为完全再结晶铁素体和少量珠光体,平均晶粒尺寸30μm左右。相对于常规奥氏体轧制,铁素体轧制薄板的屈服强度下降了20%左右,伸长率及应变硬化指数与之相当。横向、纵向及45°方向的塑性应变比值分别为0.76、0.35、0.70,明显低于常规奥氏体轧制。低碳钢的动态应变时效行为是导致其铁素体轧制薄板塑性应变比值较低的主要原因。
Low carbon steel strip is produced by ferrite rolling on Flexible Thin Slab Rolling Production Line （FTSR） at Tangshan Iron ＆Steel Group Co. , Ltd. The mechanical properties, microstructure and texture of the strip were studied. The results showed that the microstructure of the strip is characterized by full recrystallized ferrite, of about 30 μm in grain size, and small amount of pearlite. Compared with the strip produced by conventional austenite rolling, the yield strength of the ferrite rolled strip was lower by about 20%, with same elongation and strain hardening exponent. The plastic strain ratios were 0.76,0.35 and 0.70 in transverse direction, longitudinal direction, and 45° direction respectively. The dynamic strain aging of low carbon steel is the main reason of low plastic strain ratios value of the ferrite rolled strip.
出处
《钢铁》
CAS
CSCD
北大核心
2008年第5期71-74,共4页
Iron and Steel
基金
河北省自然科学基金资助项目(E2007000374)
关键词
低碳钢
铁素体轧制
力学性能
织构
low carbon steel
ferrite rolling
mechanical property
texture
